CN117200551B - Temperature control method of switching power supply and switching power supply - Google Patents
Temperature control method of switching power supply and switching power supply Download PDFInfo
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- CN117200551B CN117200551B CN202311467619.9A CN202311467619A CN117200551B CN 117200551 B CN117200551 B CN 117200551B CN 202311467619 A CN202311467619 A CN 202311467619A CN 117200551 B CN117200551 B CN 117200551B
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Abstract
The invention discloses a temperature control method of a switch power supply and the switch power supply, the switch power supply comprises a substrate and a plurality of power supply circuits, the plurality of power supply circuits are distributed in a plurality of working areas on the substrate, the method comprises the following steps: acquiring temperature values of all working areas; the temperature values of all the working areas are weighted according to the balance temperature value calculation model and then averaged to obtain the balance temperature value of the switching power supply; determining overall reduced power of the power supply circuits according to the balance temperature values, determining power reduction coefficients according to target power of each power supply circuit, wherein the power reduction coefficient of the power supply circuit with higher target power is smaller; multiplying the overall reduced power by the power reduction coefficient of each power supply circuit to obtain the power to be reduced of each power supply circuit; and reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit and outputting the target power. The present invention aims to control the output power of a switching power supply to keep the temperature of the switching power supply within a normal range.
Description
Technical Field
The invention relates to the field of switching power supplies, in particular to a temperature control method of a switching power supply and the switching power supply.
Background
At present, a plurality of power supply circuits are arranged in the switch power supply to supply power to different loads or working modules in the switch power supply, and when the temperature of the switch power supply is too high, the normal operation of the switch power supply can be influenced, and at the moment, one or more power supply circuits with higher power can be controlled to reduce the output power or stop working, so that the overall temperature of the switch power supply is reduced. At this time, it cannot be ensured that normal power supply can be performed to a plurality of loads or working modules.
Disclosure of Invention
The invention mainly aims to provide a temperature control method of a switching power supply and the switching power supply, and aims to control the output power of the switching power supply so as to keep the temperature of the switching power supply within a normal range.
In order to achieve the above object, the present invention provides a temperature control method of a switching power supply, the switching power supply includes a substrate and a plurality of power circuits, the substrate has a plurality of working areas, the plurality of power circuits are distributed in the plurality of working areas, the method includes the following steps:
acquiring the temperature value of each working area;
weighting and calculating the temperature value of each working area according to the balance temperature value calculation model, and then averaging to obtain the balance temperature value of the switching power supply;
determining overall reduced power of a plurality of power supply circuits according to the balance temperature value, and determining a power reduction coefficient according to target power of each power supply circuit, wherein the power reduction coefficient of the power supply circuit with higher target power is smaller;
multiplying the overall reduced power by the power reduction coefficient of each power supply circuit to obtain the power to be reduced of each power supply circuit;
and reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit, and controlling each power supply circuit to output according to the reduced target power.
Optionally, the temperature control method of the switching power supply further includes the following steps:
obtaining a plurality of reduced power upper limit values of the power supply circuits;
when the power to be reduced of any one of the power supply circuits exceeds the upper limit value of the reduced power of the power supply circuit, reducing the target power of the power supply circuit according to the upper limit value of the reduced power, and obtaining a reduced power difference value by making a difference between the power to be reduced and the upper limit value of the reduced power;
inquiring a power supply circuit with the power to be reduced smaller than the upper limit value of the reduced power, and recording the power supply circuit as a power supply circuit which is not full;
and determining the priority according to the target power of the non-full power supply circuit, and reducing the target power of the non-full power supply circuit according to the priority of the non-full power supply circuit by a reduced power difference value, wherein the higher the target power is, the lower the priority of the non-full power supply circuit is.
Optionally, the temperature control method of the switching power supply further includes the following steps:
when the temperature value of any one of the working areas is larger than a first preset temperature value corresponding to the working area, controlling a power circuit of the working area to output the lowest power;
when the temperature value of any one working area is larger than a second preset temperature value corresponding to the working area, performing fault judgment on the power supply circuit of the working area, if no fault exists, controlling the power supply circuit of the working area to continuously output the lowest power, and if the fault exists, controlling the power supply circuit of the working area to stop working; the first preset temperature value is less than the second preset temperature value.
Optionally, the fault judgment for the power circuit of the working area specifically includes the following steps:
acquiring an input voltage value and an output voltage value of a power supply circuit of the working area;
calculating a ratio of the input voltage value to the output voltage value;
when the ratio is within a preset ratio range, the power circuit of the working area has no fault;
and when the ratio is not in the preset ratio range, the power circuit of the working area fails.
Optionally, the fault judgment for the power circuit of the working area specifically includes the following steps:
acquiring an input voltage value and an output voltage value of a power supply circuit of the working area;
when the input voltage value of the power supply circuit of the working area is in a preset input voltage range and the output voltage value of the power supply circuit of the working area is in a preset output voltage range, the power supply circuit of the working area has no fault;
and when the input voltage value of the power supply circuit of the working area is not in a preset input voltage range or the output voltage value of the power supply circuit of the working area is not in a preset output voltage range, the power supply circuit of the working area fails.
Optionally, the switching power supply further comprises a cooling module, and the temperature control method of the switching power supply further comprises the following steps:
when the temperature value of any one of the working areas is larger than the early warning temperature value of the working area, the cooling module is controlled to work so as to cool the working area.
Optionally, the temperature control method of the switching power supply further includes the following steps:
acquiring initial temperature values and end temperature values of a plurality of preset time periods of the working areas, and calculating to obtain a temperature value difference value according to the initial temperature values and the end temperature values;
calculating according to the preset time period and the temperature value difference value to obtain temperature rising trend values of a plurality of working areas;
and when the temperature rising trend value of any one of the working areas is larger than the safety trend value of the working area, controlling the power supply circuit of the working area to output the lowest power.
The invention also proposes a switching power supply comprising:
a substrate;
the substrate is provided with a plurality of working areas, and the power supply circuits are distributed in the working areas;
the temperature detection module is used for detecting temperatures of a plurality of working areas of the substrate and outputting a plurality of temperature detection signals;
the control module is used for carrying out weighted calculation on the temperature values of the working areas according to the balanced temperature value calculation model and then carrying out averaging so as to obtain the balanced temperature value of the switching power supply; determining overall reduced power of a plurality of power supply circuits according to the balance temperature value, and determining a power reduction coefficient according to target power of each power supply circuit, wherein the power reduction coefficient of the power supply circuit with higher target power is smaller; multiplying the overall reduced power with the power reduction coefficient of each power supply circuit to obtain the power to be reduced of each power supply circuit; reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit, and controlling each power supply circuit to output according to the reduced target power;
and a memory module storing a computer program which, when executed by the control module, implements the steps of the temperature control method of the switching power supply as described above.
Optionally, the switching power supply further includes:
the shell is provided with a containing cavity, and the substrate, the temperature detection module, the control module and the storage module are arranged in the shell;
the cooling module is arranged in the shell, and the control module is further used for controlling the cooling module to work when the temperature value of any one working area is larger than the early warning temperature value of the working area so as to cool the working area.
According to the technical scheme, the temperature value of each working area is obtained, the balance temperature value of the switching power supply is calculated according to the balance temperature value calculation model, then the overall reduction power of a plurality of power supply circuits is determined according to the balance temperature value, and the power reduction coefficient is determined according to the target power of each power supply circuit, so that the power to be reduced of each power supply circuit is obtained. And finally, reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit, and controlling each power supply circuit to output according to the reduced target power. Therefore, the whole temperature of the switching power supply can be reduced, and the output power of each power supply circuit can be kept in a normal working range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart illustrating steps of a method for controlling a temperature of a switching power supply according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a method for controlling a temperature of a switching power supply according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps of a method for controlling a temperature of a switching power supply according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a method for controlling a temperature of a switching power supply according to still another embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps of a method for controlling the temperature of a switching power supply according to another embodiment of the present invention;
FIG. 6 is a flowchart illustrating steps of a method for controlling the temperature of a switching power supply according to another embodiment of the present invention;
fig. 7 is a schematic diagram of functional modules of an embodiment of the switching power supply of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a temperature control method of a switching power supply, which comprises a substrate and a plurality of power supply circuits, wherein the substrate is provided with a plurality of working areas, and the power supply circuits are distributed in the working areas.
Referring to fig. 1, in an embodiment of the present invention, a temperature control method of a switching power supply includes the steps of:
s100, acquiring temperature values of all the working areas;
s200, carrying out weighted calculation on the temperature values of the working areas according to a balanced temperature value calculation model, and then averaging to obtain a balanced temperature value of the switching power supply;
s300, determining overall reduced power of a plurality of power supply circuits 10 according to the balance temperature value, and determining a power reduction coefficient according to target power of each power supply circuit 10, wherein the power reduction coefficient of the power supply circuit 10 with higher target power is smaller;
s400, multiplying the overall reduced power with the power reduction coefficient of each power supply circuit 10 to obtain the power to be reduced of each power supply circuit 10;
s500, reducing the target power of each power supply circuit 10 according to the power to be reduced of each power supply circuit 10, and controlling each power supply circuit 10 to output according to the reduced target power.
In this embodiment, step S100 may obtain temperature values of a plurality of working areas on the substrate, where the plurality of power circuits 10 are distributed in the plurality of working areas, or one power circuit 10 may be disposed in each working area, or a plurality of power circuits 10 may be disposed in each working area, for example, power circuits 10 with the same output power or close output power are disposed in the same working area; the method can be specifically set according to actual conditions and user requirements. After the temperature values of the working areas are obtained, the balance temperature of the whole switching power supply can be further calculated. So as to adjust the output power of the power supply circuit 10 in different operating areas of the switching power supply, thereby controlling the overall temperature of the switching power supply.
Step 200, performing weighted calculation on the temperature values of the working areas according to a preset balance temperature value calculation model, and then averaging to obtain a balance temperature value of the switching power supply; for example, the temperature values of the three working areas are A, B, C, and weights corresponding to the three working areas in the preset calculation model are a, B and C, so that the equilibrium temperature value of the switching power supply is q= (a×a+b×b+c×c)/(3) can be calculated. The weight corresponding to each working area may be set according to the output power of the power supply circuit 10 in practical application, for example, if the average output power of the power supply circuit 10 in one working area is higher, the higher weight may be set. Because the substrate of the switching power supply is usually a metal material, the metal material has heat conducting capability, and therefore, the overall temperature on the substrate of the switching power supply is affected by the high temperature of one working area in the working process; the higher the temperature of the power supply circuit 10 at a higher output power, the greater the effect on the overall temperature of the switching power supply.
In step S300, the overall reduced power of the power supply circuits 10 may be determined according to the calculated balance temperature value, for example, if the balance temperature value is higher, this indicates that the overall temperature value of the switching power supply is higher at this time, which may affect the service life of the switching power supply or cause some electronic components in the switching power supply to fail to operate normally, so that the output power of the power supply circuits 10 in each working area needs to be reduced, thereby reducing the overall temperature of the switching power supply. It will be appreciated that power supply circuits 10 in different operating regions may have different target output powers, such as power supply circuits 10 for powering loads, the target output power being higher, and power supply circuits 10 for powering the switching power supply internally, the target output power being lower. For a switching power supply, the power supply circuit 10 with a higher target output power represents a heavier task, and thus needs to ensure its output capability. The power reduction coefficient can be determined according to the target power of each power supply circuit 10, the higher the target power, the smaller the power reduction coefficient of the power supply circuit 10. Such as the power supply circuit 10 supplying power to the load, needs to output larger power, and the reduction coefficient is smaller; the power supply circuit 10 for supplying power to the inside of the switching power supply needs to output smaller power, and the reduction coefficient is larger. Compared with the means for reducing the output power of the high-power supply circuit to reduce the temperature, the comprehensive requirements in the embodiment consider that the means for reducing the overall power is utilized to ensure that the output with high power is not excessively reduced, so that the temperature of the switching power supply is not excessively high, and the output power of the switching power supply to the load is ensured to be kept within a normal working range. The specific overall reduction power, the target power of each power supply circuit 10, and the determination of the power reduction coefficient may be set according to actual conditions.
Step S400 is to multiply the overall reduced power and the power reduction coefficient of each power supply circuit 10 to obtain the power to be reduced of each power supply circuit 10 after obtaining the overall reduced power and the power reduction coefficient of each power supply circuit 10 through the step S300. For example, the overall power reduction is 100W, and the power reduction coefficient of one power supply circuit 10 is 0.1, so that the power to be reduced of the power supply circuit 10 is 10W; if the power reduction coefficient is 0.5, the power to be reduced of the power supply circuit 10 is 50W.
Step S500 is to reduce the target power of each power supply circuit 10 after determining the power to be reduced of each power supply circuit 10 in step S400, and control each power supply circuit 10 to output according to the reduced target power. For example, the target power of one power supply circuit 10 is 100W, and the target power of the power supply circuit 10 after the reduction is 70W when the power to be reduced is 30W.
According to the technical scheme, the temperature value of each working area is obtained, the balance temperature value of the switching power supply is calculated according to the balance temperature value calculation model, then the overall reduction power of the power supply circuits 10 is determined according to the balance temperature value, and the power reduction coefficient is determined according to the target power of each power supply circuit 10, so that the power to be reduced of each power supply circuit 10 is obtained. Finally, the target power of each power supply circuit 10 is reduced according to the power to be reduced of each power supply circuit 10, and each power supply circuit 10 is controlled to output according to the reduced target power. This ensures that the output power of each power supply circuit 10 remains within the normal operating range while reducing the overall temperature of the switching power supply.
In an embodiment, the temperature control method of the switching power supply further includes the following steps:
s610, acquiring a plurality of reduced power upper limit values of the power supply circuit 10;
s620, when the power to be reduced of any one of the power supply circuits 10 exceeds the upper limit value of the reduced power of the power supply circuit 10, reducing the target power of the power supply circuit 10 according to the upper limit value of the reduced power, and obtaining a reduced power difference value by making a difference between the power to be reduced and the upper limit value of the reduced power;
s630, inquiring the power supply circuit 10 with the power to be reduced smaller than the upper limit value of the reduced power, and recording as an unsatisfied power supply circuit 10;
s640, determining a priority according to the target power of the non-full power supply circuit 10, and reducing the target power of the non-full power supply circuit 10 according to the priority of the non-full power supply circuit 10 by a reduced power difference value, wherein the higher the target power is, the lower the priority of the non-full power supply circuit 10 is.
In the embodiment, in step S610, the reduced power upper limit values of the power supply circuits 10 are obtained, and it is understood that in order to ensure that the switching power supply can maintain operation, the power supply circuits 10 all have the lowest output power, and the lowest output power of each power supply circuit 10 can be set according to practical situations. The reduced power upper limit value of the plurality of power supply circuits 10 can be obtained by subtracting the lowest output power of the power supply circuit 10 from the target power of the power supply circuit 10.
In step S620, the power to be reduced of the power supply circuit 10 and the upper limit value of the power to be reduced can be compared, and if the power to be reduced of the power supply circuit 10 exceeds the upper limit value of the power to be reduced, the power of the excess portion needs to be reduced by other power supply circuits 10 in the switching power supply. The excess is noted as the reduced power difference and may be obtained by subtracting the reduced power upper limit from the power to be reduced.
In step S630, the power supply circuit 10 with the power to be reduced being smaller than the upper limit value of the reduced power among the power supply circuits 10 is denoted as the less than full power supply circuit 10, so that the power reduction can be continued by the less than full power supply circuit 10.
Step S640 determines the priorities of the plurality of less than full power circuits 10, and then selects less than full power circuits 10 from high to low according to the priorities to perform power reduction according to the reduced power difference. The priority of the less-full power supply circuit 10 with higher target power is lower, so that the less-full power supply circuit 10 with lower target power is preferentially selected for power reduction, and when the power to be reduced of any one or more power supply circuits 10 exceeds the upper limit value of the reduced power of the power supply circuit 10, the more-excessive part of power is reduced by the less-full power supply circuit 10, so that the power is reduced to reduce the temperature, and the stability of the whole operation of the switching power supply is maintained.
In an embodiment, the temperature control method of the switching power supply further includes the following steps:
s710, when the temperature value of any one of the working areas is greater than a first preset temperature value corresponding to the working area, controlling the power circuit 10 of the working area to output the lowest power;
s720, when the temperature value of any one of the working areas is larger than a second preset temperature value corresponding to the working area, performing fault judgment on the power supply circuit 10 of the working area, if no fault exists, controlling the power supply circuit 10 of the working area to continuously output the lowest power, and if the fault exists, controlling the power supply circuit 10 of the working area to stop working; the first preset temperature value is less than the second preset temperature value.
In this embodiment, step S710 may be to compare the temperature value of the working area with a first preset temperature value corresponding to the working area, if the temperature value of the working area is greater than the first preset temperature value of the working area, the temperature of the working area is indicated to be too high, and the temperature of the working area cannot be effectively reduced only by reducing according to the power to be reduced in the above embodiment, so that the temperature of the working area cannot be reduced in a short time, and thus some electronic components in the working area cannot work normally or the service life is reduced. It is necessary to control the power supply circuit 10 of the operating region to output the minimum power at this time, thereby achieving the effect of rapid cooling and also maintaining the operating state of the switching power supply stable.
In step S720, when the temperature value of the working area is greater than the second preset temperature value of the working area, the temperature of the working area is still increased under the condition that the power circuit 10 of the working area outputs the lowest power, and it is required to determine whether the power circuit 10 of the working area has a fault. It is possible to determine whether the power supply circuit 10 has failed or not by specifically determining the voltage or current condition of the power supply circuit 10. If no fault occurs, the temperature representing the operating area is affected by other factors, such as the temperature of other operating areas being too high, or the ambient temperature being too high, etc., at which time the power supply circuit 10 of the operating area may be controlled to continue outputting the lowest power. If the power supply circuit 10 fails, the power supply circuit 10 in the operating region can be controlled to stop operating, so that the temperature of the operating region is prevented from further increasing, and the electronic components in the switching power supply are prevented from being damaged. The first preset temperature and the second preset temperature of each of the operation regions may be set according to the condition of the power supply circuit 10 within the operation region.
In one embodiment, the fault determination for the power circuit 10 in the working area specifically includes the following steps:
s721, acquiring an input voltage value and an output voltage value of the power circuit 10 in the working area;
s722, calculating the ratio of the input voltage value to the output voltage value;
s723, when the ratio is within a preset ratio range, the power circuit 10 of the working area has no fault;
and S724, when the ratio is not in the range of the preset ratio, the power circuit 10 in the working area fails.
In this embodiment, step S721 is to obtain the input voltage value and the output voltage value of the power circuit 10 in the working area, so that it can be determined whether the power circuit 10 has a fault or not through the input voltage value and the output voltage value. The determination may be made by an input current value and an output current value, or an input power and an output power, or the like.
Step S722 is to calculate the ratio of the input voltage value and the output voltage value of the power circuit 10. It will be appreciated that, when the power circuit 10 is operating normally, the power circuit 10 will convert the input voltage to output a voltage, and the specific step-down or step-up is determined by the function of the power circuit 10, so that the input voltage and the output voltage of the power circuit 10 have a certain proportional relationship. After the ratio of the input voltage value to the output voltage value is calculated in this way, it is possible to determine whether the power supply circuit 10 has a fault by the ratio.
Step S723 is to determine whether the ratio is within a preset ratio range. Since the ratio of the input voltage to the output voltage of the power supply circuit 10 is not fixed and fluctuates to some extent during operation, the preset ratio range can be set according to actual conditions. When the ratio of the input voltage value to the output voltage value of the power circuit 10 is within the preset ratio range, it represents that the power circuit 10 operates normally.
In step S724, when it is determined that the ratio of the input voltage value to the output voltage value of the power circuit 10 is not within the preset ratio range, it represents that the working state of the power circuit 10 is abnormal, i.e. a fault occurs.
In one embodiment, the fault determination for the power circuit 10 in the working area specifically includes the following steps:
s725, acquiring an input voltage value and an output voltage value of the power circuit 10 in the working area;
s726, when the input voltage value of the power circuit 10 in the working area is within a preset input voltage range and the output voltage value of the power circuit 10 in the working area is within a preset output voltage range, the power circuit 10 in the working area has no fault;
s727, when the input voltage value of the power circuit 10 in the working area is not within the preset input voltage range or the output voltage value of the power circuit 10 in the working area is not within the preset output voltage range, the power circuit 10 in the working area fails.
In this embodiment, the input voltage value and the output voltage value of the power supply circuit 10 in the working area can also be obtained, and then, whether the power supply circuit 10 fails or not can be judged according to the input voltage value and the output voltage value of the power supply circuit 10 in the working area. It will be appreciated that, during normal operation of the power circuit 10, both the input voltage value and the output voltage value of the power circuit 10 will be within normal ranges. And when the temperature of the working area is too high and any one of the input voltage value and the output voltage value of the power circuit 10 is not in the corresponding preset range, the power circuit 10 is represented to be failed. In a special case, the power supply circuit 10 fails, the input voltage value and the output voltage value of the power supply circuit 10 rise simultaneously, and the ratio of the voltage value to the output voltage value may not exceed the preset ratio range, so that the power supply circuit 10 cannot be judged to fail.
Therefore, the fault determination is specifically performed by the ratio of the input voltage value to the output voltage value, or by comparing the input voltage value and the output voltage value of the power circuit 10 with the preset voltage range, and the fault determination may be performed by selecting according to the user requirement, or by adopting a means combining two modes.
In an embodiment, the switching power supply further includes a cooling module 50, and the temperature control method of the switching power supply further includes the following steps:
when the temperature value of any one of the working areas is greater than the pre-warning temperature value of the working area, the cooling module 50 is controlled to work so as to cool the working area.
In this embodiment, when the temperature value of the working area is detected to be greater than the early warning temperature value of the working area, the cooling module 50 can be controlled to operate, so that the working area is cooled, and thus the temperature can be quickly reduced when the temperature of the working area is higher, and the temperature of the working area cannot be quickly reduced due to the fact that the output power of the power circuit 10 in the working area is reduced, the cooling module 50 can play a role in quickly reducing the temperature.
The early warning temperature value may be the first preset temperature value or the second preset temperature value in the above embodiment, or may be set separately according to the actual situation. The temperature of the corresponding degree can be further reduced according to different temperature values, for example, the higher the temperature value of the working area is, the more the output power of the temperature reducing module 50 is controlled, i.e. the temperature reducing capability of the temperature reducing module 50 is improved.
In an embodiment, the temperature control method of the switching power supply further includes the following steps:
s810, acquiring initial temperature values and end temperature values of a plurality of preset time periods of the working area, and calculating to obtain a temperature value difference value according to the initial temperature values and the end temperature values;
s820, calculating according to the preset time period and the temperature value difference value to obtain temperature rising trend values of a plurality of working areas;
and S830, when the temperature rising trend value of any one of the working areas is larger than the safety trend value of the working area, controlling the power circuit 10 of the working area to output the lowest power.
In this embodiment, the temperature rising trend values of the plurality of working areas can be calculated, the rising condition of the temperature of the working areas is determined according to the temperature rising trend values, and when the temperature of the working areas rises too fast, the power supply circuit 10 of the working areas is controlled to output the lowest power, so that the temperature rising trend is reduced, and the problem that the power supply circuit 10 cannot work normally due to the too high temperature is avoided. The temperature rising trend value can be specifically calculated by a preset time period and a temperature value difference value. For example, the temperature value at this time and before 3 seconds is obtained, the temperature is 23 degrees at this time, the temperature before 3 seconds is 20 degrees, the temperature value before 3 seconds is subtracted from the temperature value at this time, the temperature value difference is 3 degrees, the temperature value difference is divided by the time period, the temperature rising trend value is 3, if the safety trend value is 5, the temperature rising of the working area is indicated to be in a normal condition and the normal operation of the power circuit 10 is not affected, if the temperature rising trend value is greater than the safety trend value of the working area, the temperature rising of the working area is indicated to be in an abnormal condition, and at this time, the power circuit 10 of the working area can be controlled to output the lowest power, thereby reducing the temperature rising trend value of the working area.
The invention also proposes a switching power supply comprising:
a substrate;
a plurality of power circuits 10, wherein the substrate is provided with a plurality of working areas, and the plurality of power circuits 10 are distributed in the plurality of working areas;
a temperature detection module 20 for detecting temperatures of a plurality of working areas of the substrate and outputting a plurality of temperature detection signals;
the control module 30 is used for carrying out weighted calculation on the temperature values of the working areas according to the balanced temperature value calculation model and then carrying out averaging so as to obtain the balanced temperature value of the switching power supply; determining overall reduced power of the plurality of power supply circuits 10 according to the equilibrium temperature value, and determining a power reduction coefficient according to a target power of each of the power supply circuits 10, the power reduction coefficient of the power supply circuit 10 having a higher target power being smaller; multiplying the overall reduced power by the power reduction coefficient of each power supply circuit 10 to obtain the power to be reduced of each power supply circuit 10; reducing the target power of each power supply circuit 10 according to the power to be reduced of each power supply circuit 10, and controlling each power supply circuit 10 to output according to the reduced target power;
a memory module 40 storing a computer program which, when executed by the control module 30, implements the steps of the temperature control method of the switching power supply as described above.
In this embodiment, the substrate may be a circuit board, i.e. a PCB board. The plurality of power supply circuits 10 may then perform voltage conversion for powering external loads connected to the switching power supply or for powering other operating modules within the switching power supply. The temperature detection module 20 may be configured by a temperature sensor or a thermistor, and is configured to detect temperatures of a plurality of working areas on the substrate, and output a plurality of temperature detection signals to the control module 30. The control module 30 may be composed of electronic components such as a controller or a control chip and a resistor. The control module 30 may obtain temperature values of a plurality of working areas according to the temperature detection signals, perform weighted calculation on the temperature values of each working area according to a balanced temperature value calculation model, and then average the weighted calculation to obtain a balanced temperature value of the switching power supply, determine overall reduced power of a plurality of power supply circuits 10 according to the balanced temperature value, and determine a power reduction coefficient according to the target power of each power supply circuit 10, wherein the power reduction coefficient of the power supply circuit 10 with higher target power is smaller; multiplying the overall reduced power with the power reduction coefficient of each power supply circuit 10 to obtain the power to be reduced of each power supply circuit 10; finally, the target power of each power supply circuit 10 may be reduced according to the power to be reduced of each power supply circuit 10, and each power supply circuit 10 may be controlled to output according to the reduced target power. This ensures that the output power of each power supply circuit 10 remains within the normal operating range while reducing the overall temperature of the switching power supply. The memory module 40 may be composed of a plurality of E2 PROMs, DDR3, or other types of memories.
In an embodiment, the switching power supply further comprises:
a housing in which a receiving chamber is formed, the substrate, the temperature detection module 20, the control module 30, and the storage module 40 being disposed;
the cooling module 50 is disposed in the housing, and the control module 30 is further configured to control the cooling module 50 to operate so as to cool the working area when the temperature value of any one of the working areas is greater than the pre-warning temperature value of the working area.
In this embodiment, the housing may be used to fix the positional relationship among the substrate, the temperature detection module 20, the control module 30 and the storage module 40, ensure the safety and stability inside the accommodating cavity formed by the switch power supply housing, and prevent the external air or object from falling on the substrate, so as to affect the operation of the power supply circuit 10 on the substrate.
The cooling module 50 may be formed of a plurality of heat sinks, a fan, a heat absorbing box, or the like. The control module 30 may control the cooling module 50 to operate to cool down any one of the working areas when the temperature value of the working area is greater than the pre-warning temperature value of the working area, so as to increase the cooling speed of the working area.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. The temperature control method of the switching power supply is characterized in that the switching power supply comprises a substrate and a plurality of power supply circuits, the substrate is provided with a plurality of working areas, and the power supply circuits are distributed in the working areas one by one or many by many, and the method comprises the following steps:
acquiring the temperature value of each working area;
weighting and calculating the temperature value of each working area according to the balance temperature value calculation model, and then averaging to obtain the balance temperature value of the switching power supply;
determining overall reduced power of a plurality of power supply circuits according to the balance temperature value, and determining a power reduction coefficient according to target power of each power supply circuit, wherein the power reduction coefficient of the power supply circuit with higher target power is smaller;
multiplying the overall reduced power by the power reduction coefficient of each power supply circuit to obtain the power to be reduced of each power supply circuit;
and reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit, and controlling each power supply circuit to output according to the reduced target power.
2. The method for controlling the temperature of a switching power supply according to claim 1, further comprising the steps of:
obtaining a plurality of reduced power upper limit values of the power supply circuits;
when the power to be reduced of any one of the power supply circuits exceeds the upper limit value of the reduced power of the power supply circuit, reducing the target power of the power supply circuit according to the upper limit value of the reduced power, and obtaining a reduced power difference value by making a difference between the power to be reduced and the upper limit value of the reduced power;
inquiring a power supply circuit with the power to be reduced smaller than the upper limit value of the reduced power, and recording the power supply circuit as a power supply circuit which is not full;
and determining the priority according to the target power of the non-full power supply circuit, and reducing the target power of the non-full power supply circuit according to the priority of the non-full power supply circuit by a reduced power difference value, wherein the higher the target power is, the lower the priority of the non-full power supply circuit is.
3. The method for controlling the temperature of a switching power supply according to claim 1, further comprising the steps of:
when the temperature value of any one of the working areas is larger than a first preset temperature value corresponding to the working area, controlling a power circuit of the working area to output the lowest power;
when the temperature value of any one working area is larger than a second preset temperature value corresponding to the working area, performing fault judgment on the power supply circuit of the working area, if no fault exists, controlling the power supply circuit of the working area to continuously output the lowest power, and if the fault exists, controlling the power supply circuit of the working area to stop working; the first preset temperature value is less than the second preset temperature value.
4. A temperature control method of a switching power supply according to claim 3, wherein said performing fault determination on the power supply circuit of the operation region specifically includes the steps of:
acquiring an input voltage value and an output voltage value of a power supply circuit of the working area;
calculating a ratio of the input voltage value to the output voltage value;
when the ratio is within a preset ratio range, the power circuit of the working area has no fault;
and when the ratio is not in the preset ratio range, the power circuit of the working area fails.
5. A temperature control method of a switching power supply according to claim 3, wherein said performing fault determination on the power supply circuit of the operation region specifically includes the steps of:
acquiring an input voltage value and an output voltage value of a power supply circuit of the working area;
when the input voltage value of the power supply circuit of the working area is in a preset input voltage range and the output voltage value of the power supply circuit of the working area is in a preset output voltage range, the power supply circuit of the working area has no fault;
and when the input voltage value of the power supply circuit of the working area is not in a preset input voltage range or the output voltage value of the power supply circuit of the working area is not in a preset output voltage range, the power supply circuit of the working area fails.
6. The method of controlling the temperature of a switching power supply according to claim 1, wherein the switching power supply further comprises a cooling module, the method of controlling the temperature of the switching power supply further comprising the steps of:
when the temperature value of any one of the working areas is larger than the early warning temperature value of the working area, the cooling module is controlled to work so as to cool the working area.
7. The method for controlling the temperature of a switching power supply according to claim 1, further comprising the steps of:
acquiring initial temperature values and end temperature values of a plurality of preset time periods of the working areas, and calculating to obtain a temperature value difference value according to the initial temperature values and the end temperature values;
calculating according to the preset time period and the temperature value difference value to obtain temperature rising trend values of a plurality of working areas;
and when the temperature rising trend value of any one of the working areas is larger than the safety trend value of the working area, controlling the power supply circuit of the working area to output the lowest power.
8. A switching power supply, comprising:
a substrate;
the substrate is provided with a plurality of working areas, and the power supply circuits are distributed in the working areas one by one or many by many;
the temperature detection module is used for detecting temperatures of a plurality of working areas of the substrate and outputting a plurality of temperature detection signals;
the control module is used for carrying out weighted calculation on the temperature values of the working areas according to the balanced temperature value calculation model and then carrying out averaging so as to obtain the balanced temperature value of the switching power supply; determining overall reduced power of a plurality of power supply circuits according to the balance temperature value, and determining a power reduction coefficient according to target power of each power supply circuit, wherein the power reduction coefficient of the power supply circuit with higher target power is smaller; multiplying the overall reduced power with the power reduction coefficient of each power supply circuit to obtain the power to be reduced of each power supply circuit; reducing the target power of each power supply circuit according to the power to be reduced of each power supply circuit, and controlling each power supply circuit to output according to the reduced target power;
a memory module storing a computer program which, when executed by the control module, implements the steps of the temperature control method of a switching power supply as claimed in any one of claims 1 to 7.
9. The switching power supply of claim 8 wherein said switching power supply further comprises:
the shell is provided with a containing cavity, and the substrate, the temperature detection module, the control module and the storage module are arranged in the shell;
the cooling module is arranged in the shell, and the control module is further used for controlling the cooling module to work when the temperature value of any one working area is larger than the early warning temperature value of the working area so as to cool the working area.
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| WO2023035707A1 (en) * | 2021-09-07 | 2023-03-16 | 阳光电源股份有限公司 | Energy conversion system, over-temperature operation control method thereof, and control apparatus |
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| US20170222465A1 (en) * | 2016-02-01 | 2017-08-03 | Qualcomm Incorporated | Dynamic thermal balancing of parallel regulators to reduce hotspots and increase performance |
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| CN104272033A (en) * | 2011-11-30 | 2015-01-07 | 三星电子株式会社 | Air conditioner |
| CN109599642A (en) * | 2017-09-30 | 2019-04-09 | 比亚迪股份有限公司 | The temperature control method and humidity control system of on-vehicle battery |
| CN112583248A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Train, bidirectional DC-DC converter and control method, device and system thereof |
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