CN105226977A - A kind of control method of inverter, device and uninterrupted power supply - Google Patents
A kind of control method of inverter, device and uninterrupted power supply Download PDFInfo
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- CN105226977A CN105226977A CN201410233955.1A CN201410233955A CN105226977A CN 105226977 A CN105226977 A CN 105226977A CN 201410233955 A CN201410233955 A CN 201410233955A CN 105226977 A CN105226977 A CN 105226977A
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Abstract
Embodiments provide a kind of control method, device and the uninterrupted power supply that comprise the inverter of RB-IGBT, in order to solve the T-shaped tri-level inversion topology of existing employing RB-IGBT when there is overcurrent, RB-IGBT wherein can bear reverse voltage, thus produces the problem of reverse leakage current.The method comprises: determine T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in this T-shaped three-level inverter is RB-IGBT.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to a kind of control method, device and the uninterrupted power supply that comprise the inverter of RB-IGBT.
Background technology
Three-level topology has the advantages that voltage withstand class is high, the aberration rate of voltage and current is low, traditional three-level structure can be divided into diode clamp formula, capacitor-clamped formula and tandem type, wherein diode clamp formula structure simple, be widely used, obtain general concern.From the topological T-shaped three-level inverter be derived of diode clamp type in low switching frequency efficient advantage more topological than diode clamp type, therefore widely used by industry gradually.The auxiliary brachium pontis of tradition T-shaped tri-level inversion topology adopts two device for power switching to join end to end, and the T-shaped tri-level inversion topology of current one, as shown in Figure 1, auxiliary brachium pontis adopts RB-IGBT (reverse blocking insulated gate bipolar transistor, ReversingBlockingInsulatedGateBipolarTransistor), namely switch transistor T 2 and switch transistor T 3 compose in parallel, RB-IGBT, due to the particularity of its technique and structure, makes loss be better than other producer's Same Efficieney grade power devices.The main distinction of traditional IGBT and RB-IGBT is the reverse blocking capability of RB-IGBT.Common IGBT does not possess reverse blocking capability.RB-IGBT possesses and bears oppositely withstand voltage ability, does not therefore need anti-and diode.
T-shaped tri-level inversion topology shown in Fig. 1, can on-off switching tube T1, switch transistor T 2, switch transistor T 3 and switch transistor T 4 when there is overcurrent.At generation forward overcurrent, namely electric current flows to neutral point N from the output OUT of T-shaped tri-level inversion topology and (between output OUT and neutral point N, is in series with filter and load, not shown in Fig. 1) time, T-shaped tri-level inversion topology shown in Fig. 1 carries out afterflow by diode D2, therefore, output OUT is pulled to negative busbar BUS-voltage, and the reverse voltage that switch transistor T 3 is born is the half of the difference of positive and negative busbar voltage.At generation negative sense overcurrent, namely electric current flows to output OUT from the neutral point N of T-shaped tri-level inversion topology and (between output OUT and neutral point N, is in series with filter and load, not shown in Fig. 1) time, T-shaped tri-level inversion topology shown in Fig. 1 carries out afterflow by diode D1, therefore, output OUT is pulled to positive bus-bar BUS+ voltage, and the reverse voltage that switch transistor T 2 is born is the half of the difference of positive and negative busbar voltage.
Because RB-IGBT is bearing reverse voltage, have reverse leakage current, and reverse leakage fails to be convened for lack of a quorum and causes the temperature of RB-IGBT sharply to rise, and finally may cause RB-IGBT overheating failure, cause great difficulty to its application.
In sum, when there is overcurrent in the T-shaped tri-level inversion topology of existing employing RB-IGBT parallel connection, RB-IGBT wherein can bear reverse voltage, thus produces reverse leakage current, this can cause the temperature of RB-IGBT sharply to rise, and finally may cause RB-IGBT overheating failure.
Summary of the invention
Embodiments provide a kind of control method, device and the uninterrupted power supply that comprise the inverter of RB-IGBT, in order to solve the T-shaped tri-level inversion topology of existing employing RB-IGBT parallel connection when there is overcurrent, RB-IGBT wherein can bear reverse voltage, thus produces the problem of reverse leakage current.
Based on the problems referred to above, a kind of control method comprising the inverter of RB-IGBT that the embodiment of the present invention provides, comprising:
Determine T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter;
From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
A kind of control device comprising the inverter of RB-IGBT that the embodiment of the present invention provides, comprising:
Determination module, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
Control module, for stopping exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
A kind of uninterrupted power supply that the embodiment of the present invention provides, comprise the T-shaped three-level inverter and controller that comprise RB-IGBT, the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT; Described controller, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal;
Described T-shaped three-level inverter, for being converted to alternating voltage by direct voltage under the control of described controller.
The beneficial effect of the embodiment of the present invention comprises:
The control method of what the embodiment of the present invention provided the comprise inverter of RB-IGBT, device and uninterrupted power supply, due to when T-shaped three-level inverter generation overcurrent, the switching tube on the main brachium pontis in this T-shaped three-level inverter can be stopped to export control signal, and from the moment stopping exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter, after the first preset duration, the switching tube that can bear reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, switching tube on auxiliary brachium pontis in this T-shaped three-level inverter is RB-IGBT, this that is, the method can be closed and have no progeny by the switching tube on the main brachium pontis in T-shaped three-level inverter, make the RB-IGBT conducting of the auxiliary brachium pontis in described T-shaped three-level inverter bearing reverse voltage, thus make this RB-IGBT bearing reverse voltage no longer bear reverse voltage, avoid the generation of leakage current, and then avoid this temperature of bearing the RB-IGBT of reverse voltage and sharply rise, protect this RB-IGBT.
Accompanying drawing explanation
Fig. 1 is the structural representation comprising the T-shaped three-level inverter of RB-IGBT of the prior art;
The structural representation comprising the T-shaped three-level inverter of RB-IGBT that Fig. 2 provides for the embodiment of the present invention;
What Fig. 3 provided for the embodiment of the present invention comprises one of flow chart of the control method of the inverter of RB-IGBT;
The flow chart two comprising the control method of the inverter of RB-IGBT that Fig. 4 a provides for the embodiment of the present invention;
The flow chart three comprising the control method of the inverter of RB-IGBT that Fig. 4 b provides for the embodiment of the present invention;
The flow chart four comprising the control method of the inverter of RB-IGBT that Fig. 5 a provides for the embodiment of the present invention;
The flow chart five comprising the control method of the inverter of RB-IGBT that Fig. 5 b provides for the embodiment of the present invention;
The flow chart six comprising the control method of the inverter of RB-IGBT that Fig. 5 c provides for the embodiment of the present invention;
The flow chart seven comprising the control method of the inverter of RB-IGBT that Fig. 6 a provides for the embodiment of the present invention;
The flow chart eight comprising the control method of the inverter of RB-IGBT that Fig. 6 b provides for the embodiment of the present invention;
The flow chart nine comprising the control method of the inverter of RB-IGBT that Fig. 6 c provides for the embodiment of the present invention;
The structural diagrams intention comprising the control device of the inverter of RB-IGBT that Fig. 7 provides for the embodiment of the present invention.
Embodiment
The control method of what the embodiment of the present invention provided the comprise inverter of RB-IGBT, device and uninterrupted power supply, when T-shaped three-level inverter generation overcurrent, switching tube on main brachium pontis in T-shaped three-level inverter can be turned off, and the switching tube on main brachium pontis in described T-shaped three-level inverter closes and has no progeny, the switching tube conducting of the auxiliary brachium pontis in described T-shaped three-level inverter bearing reverse voltage can be made, because the switching tube on the auxiliary brachium pontis in this T-shaped three-level inverter is RB-IGBT, this can make this RB-IGBT bearing reverse voltage no longer bear reverse voltage, avoid the generation of leakage current, and then avoid this temperature of bearing the RB-IGBT of reverse voltage and sharply rise, protect this RB-IGBT.
The guard method that what the embodiment of the present invention provided comprise the inverter of RB-IGBT is applied in the T-shaped three-level inverter circuit shown in Fig. 2, T-shaped three-level inverter circuit shown in Fig. 2 comprises controller 21, filter 22 and load 23 and T-shaped three-level inverter, wherein, T-shaped three-level inverter receives the direct voltage on positive direct-current bus BUS+ and negative DC bus BUS-, and to load 23 output AC voltage, T-shaped three-level inverter comprises the first switch transistor T 1, second switch pipe T2, 3rd switch transistor T 3, 4th switch transistor T 4, with the antiparallel first diode D1 of the first switch transistor T 1 and second diode D2 antiparallel with the 4th switch transistor T 4, wherein, second switch pipe T2 and the 3rd switch transistor T 3 are positioned on the auxiliary brachium pontis of T-shaped three-level inverter, second switch pipe T2 and the 3rd switch transistor T 3 are RB-IGBT, first switch transistor T 1 and the 4th switch transistor T 4 are positioned on the main brachium pontis of T-shaped three-level inverter, first switch transistor T 1 and the 4th switch transistor T 4 are traditional IGBT.Also comprise in Fig. 2 that to be connected on the point that the first electric capacity C1 between positive direct-current bus BUS+ and negative DC bus BUS-and the second electric capacity C2, the first electric capacity C1 and the second electric capacity C2 be connected be mid point N.
Below in conjunction with Figure of description, the embodiment of the control method of the inverter of a kind of RB-IGBT of comprising that the embodiment of the present invention provides, device and uninterrupted power supply is described.
A kind of control method comprising the inverter of RB-IGBT that the embodiment of the present invention provides, as shown in Figure 3, comprising:
S301, determine T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Wherein, control signal comprises and a series ofly opens signal and cut-off signals; Control signal switches between turn-on and turn-off for the switching tube controlled in T-shaped three-level inverter, thus the voltage that T-shaped three-level inverter is exported switches between the voltage and negative busbar BUS-voltage of positive bus-bar BUS+ voltage, neutral point N; Open signal for the conducting of control switch pipe; Cut-off signals is used for control switch pipe and turns off;
S302, stop on the main brachium pontis in described T-shaped three-level inverter switching tube export control signal; Namely stop exporting control signal to the first switch transistor T 1 in Fig. 2 and the 4th switch transistor T 4, the first switch transistor T 1 and the 4th switch transistor T 4 are all turned off;
S303, from described stopping on the main brachium pontis in described T-shaped three-level inverter switching tube export control signal moment, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
As shown in Figure 2, the switching tube on the main brachium pontis in T-shaped three-level inverter is in the state receiving control signal, refers to that the first switch transistor T 1 in T-shaped three-level inverter and the 4th switch transistor T 4 are all in the state receiving control signal.
Above-mentioned T-shaped three-level inverter generation overcurrent comprises two kinds of situations: one is T-shaped three-level inverter generation forward overcurrent, namely in shown in fig. 2 T-shaped three-level inverter circuit, electric current flows to neutral point N from filter 22, load 23, and the electric current on inductance in filter 22 in T-shaped three-level inverter circuit is greater than current threshold; Another kind is type three-level inverter generation negative sense overcurrent, namely in shown in fig. 2 T-shaped three-level inverter circuit, current direction flows to filter 22 from neutral point N, load 23, and the electric current on inductance in filter 22 in T-shaped three-level inverter circuit is greater than current threshold.
As shown in Figure 2, if T-shaped three-level inverter generation forward overcurrent, after stopping exporting control signal to the switching tube on the main brachium pontis in this T-shaped three-level inverter, the first switch transistor T 1 in this T-shaped three-level inverter and the 4th switch transistor T 4 all turn off, therefore, this T-shaped three-level inverter is by the second diode D2 afterflow, the voltage of the tie point of the first switch transistor T 1 and the 4th switch transistor T 4 is the voltage of negative busbar BUS-, the switching tube auxiliary brachium pontis of now this T-shaped three-level inverter bearing reverse voltage is the 3rd switch transistor T 3, therefore, S303 is: from stopping to the first switch transistor T 1 in described T-shaped three-level inverter and the 4th switch transistor T 4 export the moment of control signal, after the first preset duration, export to the 3rd switch transistor T 3 in described T-shaped three-level inverter and open signal.
As shown in Figure 2, if T-shaped three-level inverter generation negative sense overcurrent, after stopping exporting control signal to the switching tube on the main brachium pontis in this T-shaped three-level inverter, the first switch transistor T 1 in this T-shaped three-level inverter and the 4th switch transistor T 4 all turn off, therefore, this T-shaped three-level inverter is by the second diode D1 afterflow, the voltage of the tie point of the first switch transistor T 1 and the 4th switch transistor T 4 is the voltage of positive bus-bar BUS+, the switching tube auxiliary brachium pontis of now this T-shaped three-level inverter bearing reverse voltage is second switch pipe T2, therefore, S303 is: from stopping to the first switch transistor T 1 in described T-shaped three-level inverter and the 4th switch transistor T 4 export the moment of control signal, after the first preset duration, export to the second switch pipe T2 in described T-shaped three-level inverter and open signal.
Wherein, the first preset duration can preset, and the first preset duration can be the time span of Dead Time.
Alternatively, as shown in fig. 4 a, S301 specifically comprises:
Electric current on inductance in the filter that S401a, the output obtaining described T-shaped three-level inverter connect;
S402a, when the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal.
In actual applications, after electric current on the inductance in the filter that the output obtaining T-shaped three-level inverter connects, not only can judge whether it is greater than current threshold according to the electric current obtained, sense of current can also be determined, thus judge it is that forward overcurrent occurs, or there is negative sense overcurrent.
Alternatively, as shown in Figure 4 b, S301 specifically comprises:
S401b, obtain in described T-shaped three-level inverter auxiliary brachium pontis on each switching tube in the reverse voltage that bears of two ends except control end;
As shown in Figure 2, namely obtain the voltage difference Vce2 between the collector electrode c of the second switch pipe T2 on the auxiliary brachium pontis in T-shaped three-level inverter and emitter e, and obtain the voltage difference Vce3 between the collector electrode c of the 3rd switch transistor T 3 on the auxiliary brachium pontis in T-shaped three-level inverter and emitter e
S402b, when having a reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
In fig. 2, when Vce2 is greater than voltage threshold, determine T-shaped three-level inverter generation forward overcurrent; When Vce3 is greater than voltage threshold, determine T-shaped three-level inverter generation negative sense overcurrent.
Further, the control method of what the embodiment of the present invention provided the comprise inverter of RB-IGBT, as shown in Fig. 5 a, Fig. 5 b or Fig. 5 c, also comprises:
S501, from the switching tube bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter export open signal start time, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
As shown in Figure 2, when T-shaped three-level inverter generation forward overcurrent, the switching tube auxiliary brachium pontis in this T-shaped three-level inverter bearing reverse voltage is the 3rd switch transistor T 3, therefore, S501 is: from opening the start time of signal to the 3rd switch transistor T 3 output on the auxiliary brachium pontis in described T-shaped three-level inverter, after the second preset duration, stop exporting control signal to the second switch pipe T2 on the auxiliary brachium pontis in described T-shaped three-level inverter.
As shown in Figure 2, when T-shaped three-level inverter generation negative sense overcurrent, the switching tube auxiliary brachium pontis in this T-shaped three-level inverter bearing reverse voltage is second switch pipe T2, therefore, S501 is: from opening the start time of signal to the second switch pipe T2 output on the auxiliary brachium pontis in described T-shaped three-level inverter, after the second preset duration, stop exporting control signal to the 3rd switch transistor T 3 on the auxiliary brachium pontis in described T-shaped three-level inverter.
Wherein, the second preset duration can preset, and the second preset duration can be the time span of Dead Time.
Alternatively, if after T-shaped three-level inverter generation overcurrent, be not for a long time by this T-shaped three-level inverter shutdown, but will after T-shaped three-level inverter generation overcurrent, temporarily by this T-shaped three-level inverter shutdown, and after T-shaped three-level inverter overcurrent disappears, again this T-shaped three-level inverter is opened machine, so, what the embodiment of the present invention provided comprises the guard method of the T-shaped three-level inverter of RB-IGBT as Fig. 6 a, shown in Fig. 6 b or Fig. 6 c, stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, also comprise:
S601, determine that described T-shaped three-level inverter overcurrent disappears;
When the electric current on the inductance in the filter that the output by obtaining T-shaped three-level inverter connects judges whether this T-shaped three-level inverter overcurrent occurs, S601 is specially: determine that the electric current got is not more than current threshold;
When the reverse voltage born when the two ends in each switching tube on the auxiliary brachium pontis by obtaining in described T-shaped three-level inverter except control end judges whether this T-shaped three-level inverter overcurrent occurs, S601 is specially: determine that the reverse voltage got is not more than voltage threshold, namely Vce2 and Vce3 is all not more than voltage threshold;
S602, on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal;
As shown in Figure 2, after the forward overcurrent of T-shaped three-level inverter disappears, S602 is specially: export control signal to the second switch pipe T2 switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter; After the negative sense overcurrent of T-shaped three-level inverter disappears, S602 is specially: export control signal to the 3rd switch transistor T 3 switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter;
S603, to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal;
As shown in Figure 2, after the forward overcurrent of T-shaped three-level inverter disappears, S603 is specially: from the start time exporting control signal to the second switch pipe T2 on the auxiliary brachium pontis in described T-shaped three-level inverter, after the 3rd preset duration, export control signal to the 3rd switch transistor T 3 on the auxiliary brachium pontis in described T-shaped three-level inverter; After the negative sense overcurrent of T-shaped three-level inverter disappears, S603 is specially: from exporting the start time of control signal to the 3rd switch transistor T 3 switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter, after the 3rd preset duration, export control signal to the second switch pipe T2 on the auxiliary brachium pontis in described T-shaped three-level inverter; Wherein, the 3rd preset duration can preset, and the 3rd preset duration can be the time span of Dead Time.
S604, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal;
As shown in Figure 2, after the forward overcurrent of T-shaped three-level inverter disappears, S604 is specially: from exporting the start time of control signal to the 3rd switch transistor T 3 on the auxiliary brachium pontis in described T-shaped three-level inverter, after the 4th preset duration, export control signal respectively to the first switch transistor T 1 in described T-shaped three-level inverter and second switch pipe T2; After the negative sense overcurrent of T-shaped three-level inverter disappears, S604 is specially: from the start time exporting control signal to the second switch pipe T2 on the auxiliary brachium pontis in described T-shaped three-level inverter, after the 4th preset duration, export control signal respectively to the first switch transistor T 1 in described T-shaped three-level inverter and second switch pipe T2; Wherein, the 4th preset duration can preset, and the 4th preset duration can be the time span of Dead Time.
What the control method that what the embodiment of the present invention provided comprise the inverter of RB-IGBT can also be applied to other comprises in the inverter circuit of RB-IGBT series connection or parallel connection, as long as when comprising the inverter circuit generation overcurrent of RB-IGBT series connection or parallel connection, control comprises the RB-IGBT conducting of bearing reverse voltage in the inverter circuit of RB-IGBT series connection or parallel connection and RB-IGBT can be avoided to occur leakage current, thus it is overheated to avoid RB-IGBT to occur, the even problem such as inefficacy.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of control device and the uninterrupted power supply that comprise the inverter of RB-IGBT, the principle of dealing with problems due to this device and uninterrupted power supply is similar to the aforementioned control method comprising the inverter of RB-IGBT, therefore the enforcement of this device see the enforcement of preceding method, can repeat part and repeats no more.
The control device of what the embodiment of the present invention provided the comprise inverter of RB-IGBT, as shown in Figure 7, comprising:
Determination module 71, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
Control module 72, for stopping exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
Alternatively, determination module 71 specifically for: obtain described T-shaped three-level inverter output connect filter in inductance on electric current; When the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal.
Alternatively, determination module 71 specifically for: obtain the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born; When having the reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal.
Further, control module 72 also for: from the switching tube bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter export open signal start time, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
Further, determination module 71 also for: stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, determine that described T-shaped three-level inverter overcurrent disappears;
Control module 72 also for: on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal; From to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal; From on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal.
The uninterrupted power supply that the embodiment of the present invention provides comprises the T-shaped three-level inverter circuit comprising RB-IGBT shown in Fig. 2, and this uninterrupted power supply comprises T-shaped three-level inverter and controller 21; This T-shaped three-level inverter is the inverter be made up of the first switch transistor T 1, second switch pipe T2, the 3rd switch transistor T 3, the 4th switch transistor T 4, first diode D1 and the second diode D2 in Fig. 2, wherein, second switch pipe T2 and the 3rd switch transistor T 3 are all arranged on the auxiliary brachium pontis of T-shaped three-level inverter, and are RB-IGBT; Controller 21, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal;
T-shaped three-level inverter, for being converted to alternating voltage by direct voltage under the control of controller 21.
Alternatively, controller 21 specifically for: obtain described T-shaped three-level inverter output connect filter in inductance on electric current; When the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal.
Wherein, controller 21 obtain described T-shaped three-level inverter output connect filter in inductance on electric current, comprise two kinds of situations: one be controller 21 detect described T-shaped three-level inverter output connect filter in inductance on electric current; Two is also comprise testing circuit in uninterrupted power supply, and the electric current on the inductance in the filter that the output detecting T-shaped three-level inverter by testing circuit connects, controller 21 obtains testing circuit and electric current detected from testing circuit.
Alternatively, controller 21 specifically for: obtain the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born; When having the reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal.
Wherein, the reverse voltage that two ends in each switching tube on auxiliary brachium pontis in T-shaped three-level inverter described in controller 21 except control end are born, comprises two kinds of situations: one is the reverse voltage that the two ends in each switching tube on controller 21 detects in described T-shaped three-level inverter auxiliary brachium pontis except control end are born; Two is also comprise testing circuit in uninterrupted power supply, detected the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born by testing circuit, controller 21 obtains testing circuit and voltage detected from testing circuit.
Further, controller 21 also for: from the switching tube bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter export open signal start time, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
Further, controller 21 also for: stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, determine that described T-shaped three-level inverter overcurrent disappears; On the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal; From to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal; From on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (15)
1. comprise a control method for the inverter of reverse blocking insulated gate bipolar transistor RB-IGBT, it is characterized in that, comprising:
Determine T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter;
From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
2. the method for claim 1, is characterized in that, describedly determines T-shaped three-level inverter generation overcurrent, specifically comprises:
Electric current on inductance in the filter that the output obtaining described T-shaped three-level inverter connects;
When the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent.
3. the method for claim 1, is characterized in that, describedly determines T-shaped three-level inverter generation overcurrent, specifically comprises:
Obtain the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born;
When having the reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent.
4. the method as described in as arbitrary in claims 1 to 3, it is characterized in that, described method also comprises:
From the start time of signal is opened in the switching tube output of bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
5. method as claimed in claim 4, is characterized in that, stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, described method also comprises:
Determine that described T-shaped three-level inverter overcurrent disappears;
On the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal;
From to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal;
From on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal.
6. comprise a control device for the inverter of reverse blocking insulated gate bipolar transistor RB-IGBT, it is characterized in that, comprising:
Determination module, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal;
Control module, for stopping exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT.
7. device as claimed in claim 6, is characterized in that, described determination module specifically for:
Electric current on inductance in the filter that the output obtaining described T-shaped three-level inverter connects;
When the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal.
8. device as claimed in claim 6, is characterized in that, described determination module specifically for:
Obtain the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born;
When having the reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal.
9. the device as described in as arbitrary in claim 6 ~ 8, is characterized in that, described control module also for:
From the start time of signal is opened in the switching tube output of bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
10. device as claimed in claim 9, is characterized in that, described determination module also for:
Stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, determine that described T-shaped three-level inverter overcurrent disappears;
Described control module also for:
On the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal; From to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal; From on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal.
11. 1 kinds of uninterrupted power supplys, comprise the T-shaped three-level inverter comprising reverse blocking insulated gate bipolar transistor RB-IGBT, and the switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter is RB-IGBT, it is characterized in that, also comprises controller;
Described controller, for determining T-shaped three-level inverter generation overcurrent, and the switching tube on main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal;
Described T-shaped three-level inverter, for being converted to alternating voltage by direct voltage under the control of described controller.
12. uninterrupted power supplys as claimed in claim 11, is characterized in that, described controller specifically for:
Electric current on inductance in the filter that the output obtaining described T-shaped three-level inverter connects; When the electric current got is greater than current threshold, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal.
13. uninterrupted power supplys as claimed in claim 11, is characterized in that, described controller specifically for:
Obtain the reverse voltage that the two ends in each switching tube on the auxiliary brachium pontis in described T-shaped three-level inverter except control end are born; When having the reverse voltage being greater than voltage threshold in the reverse voltage got, determine described T-shaped three-level inverter generation overcurrent; And determine that the switching tube on the main brachium pontis in described T-shaped three-level inverter is in the state receiving control signal; Stop exporting control signal to the switching tube on the main brachium pontis in described T-shaped three-level inverter; From described stopping to the moment that the switching tube on the main brachium pontis in described T-shaped three-level inverter exports control signal, after the first preset duration, the switching tube bearing reverse voltage on the auxiliary brachium pontis in described T-shaped three-level inverter exports opens signal.
14. as arbitrary in claim 11 ~ 13 as described in uninterrupted power supply, it is characterized in that, described controller also for:
From the start time of signal is opened in the switching tube output of bearing reverse voltage to the auxiliary brachium pontis in described T-shaped three-level inverter, after the second preset duration, stop on the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal.
15. uninterrupted power supplys as claimed in claim 14, is characterized in that, described controller also for:
Stop on the main brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal after, determine that described T-shaped three-level inverter overcurrent disappears; On the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export control signal; From to the auxiliary brachium pontis in described T-shaped three-level inverter except described in bear reverse voltage switching tube except switching tube export the start time of control signal, after the 3rd preset duration, on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal; From on the auxiliary brachium pontis in described T-shaped three-level inverter, described in bear reverse voltage switching tube export control signal start time, after the 4th preset duration, on the main brachium pontis in described T-shaped three-level inverter, switching tube exports control signal.
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| CN110299696A (en) * | 2019-06-21 | 2019-10-01 | 科华恒盛股份有限公司 | T-type three-level current transformer and its short-circuit protection circuit |
| CN111257716A (en) * | 2020-02-24 | 2020-06-09 | 漳州科华技术有限责任公司 | IGBT over-current detection circuit, chip and electronic equipment |
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| CN105515353A (en) * | 2016-01-27 | 2016-04-20 | 东南大学 | Four-port power electronic transformer based on hybrid modular multilevel converter (MMC) |
| CN105610336A (en) * | 2016-01-27 | 2016-05-25 | 东南大学 | Dual-capacitor module based MMC type multi-port power electronic transformer |
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| CN108551159A (en) * | 2018-04-08 | 2018-09-18 | 厦门科华恒盛股份有限公司 | Reverse blocking IGBT short-circuit protection circuit, method and system and storage medium |
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| CN110299696A (en) * | 2019-06-21 | 2019-10-01 | 科华恒盛股份有限公司 | T-type three-level current transformer and its short-circuit protection circuit |
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| CN111257716A (en) * | 2020-02-24 | 2020-06-09 | 漳州科华技术有限责任公司 | IGBT over-current detection circuit, chip and electronic equipment |
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