CN203377806U - Three-phase positive-negative switching power supply circuit - Google Patents
Three-phase positive-negative switching power supply circuit Download PDFInfo
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- CN203377806U CN203377806U CN201320353757.XU CN201320353757U CN203377806U CN 203377806 U CN203377806 U CN 203377806U CN 201320353757 U CN201320353757 U CN 201320353757U CN 203377806 U CN203377806 U CN 203377806U
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Abstract
The utility model relates to a three-phase positive-negative switching power supply circuit comprising a control chip, an MOS tube Q1, a transformer T1, and a multi-path power supply output unit. A first terminal of a primary winding of the transformer T1 is connected with an input power supply; and a second terminal of the primary winding of the transformer T1 is connected with an emitting electrode E of the MOS tube Q1. A first terminal of an auxiliary secondary winding of the transformer T1 is connected with a Vcc terminal of the control chip by a resistor R4 and a diode D2; and a second terminal of the auxiliary secondary winding of the transformer T1 is grounded. The Vcc terminal of the control chip is connected with the input power supply by a resistor R3; a grid electrode G of the MOS tube Q1 is connected with a Drv terminal of the control chip by a resistor R2; and a collector C of the MOS tube Q1 is grounded by a resistor R5. With the three-phase positive-negative switching power supply circuit, the power supply size is reduced and the efficiency is improved; and the circuit is suitable for application to a switching power supply application occasion with medium and small power outputting. Compared with the circuit with the traditional UC384X chip, the provided circuit has the good performance and the good effect.
Description
Technical field
The utility model relates to a kind of switching power circuit, particularly the positive and negative switching power circuit of a kind of three-phase.
Background technology
Switching Power Supply is to utilize modern power electronics technology, and the time ratio that the control switch pipe turns on and off maintains a kind of power supply of regulated output voltage.
Existing Switching Power Supply control chip mainly adopts UC384X, has the shortcomings such as volume is large, efficiency is low, pin is many, circuit is complicated.
The utility model content
The utility model main purpose is to address the above problem and is not enough, provides low energy consumption, pin is few, circuit is simple, the positive and negative switching power circuit of a kind of three-phase of function admirable.
For achieving the above object, the technical solution of the utility model is:
The positive and negative switching power circuit of a kind of three-phase, comprise control chip, metal-oxide-semiconductor Q1, transformer T1 and multiple power supplies output unit, the first end of the armature winding of described transformer T1 connects input power, the second end of the armature winding of described transformer T1 connects the emitter E of metal-oxide-semiconductor Q1, the first end of the auxiliary secondary winding of described transformer T1 is by resistance R 4, diode D2 is connected with the Vcc end of described control chip, the second end ground connection of the auxiliary secondary winding of described transformer T1, the Vcc end of described control chip is connected with input power by resistance R 3, the grid G of described metal-oxide-semiconductor Q1 is connected with the Drv end of described control chip by resistance R 2, the collector electrode C of described metal-oxide-semiconductor Q1 is by resistance R 5 ground connection, the input of described multiple power supplies output unit connects respectively the secondary winding of described transformer T1, output connects respectively load.
Further, control chip is the NCP1216 control chip.
Further, the collector electrode C of metal-oxide-semiconductor Q1 is connected with the CS end of NCP1216 control chip by resistance R 6, forms circuit overcurrent protection.
Further, also comprise the power supply stabilizing circuit, the power supply stabilizing circuit comprises the error current amplifier consisted of TL431, and described power supply stabilizing circuit is connected with the FB end of NCP1216 control chip by optocoupler.
Further, parallel diode D1 and resistance R 1 between the first end of the armature winding of described transformer T1 and the second end, at resistance R 1 two ends shunt capacitance C1.
Further, at described resistance R 2 a two ends diode D3 in parallel.
Further, the multiple power supplies output unit comprises power supply output unit and the DC fan power supply output unit of IGBT drive circuit power supply output unit, IGBT control single chip computer power supply output unit, IGBT control single chip computer voltage detecting circuit.
Further, IGBT drive circuit power supply output unit comprises four secondary winding, and each secondary winding comprises three transformer T1 pins, three corresponding positive voltages of transformer T1 pin difference, " 0 " and negative voltage.
Further, three secondary winding in described four secondary winding are respectively the power output end of three IGBT drive circuits of bridge, the power output end that another secondary winding is three IGBT drive circuits of lower bridge.
Content to sum up, the positive and negative switching power circuit of a kind of three-phase described in the utility model has following advantage:
1, by the NCP1216 control chip, direct driven MOS pipe, drive current can reach 500mA, and number of pin is few, function admirable, and can make that power volume is less, efficiency is higher.
2, NCP1216 control chip Vcc end connects power supply by large resistance, can obtain and start power supply, by auxiliary secondary winding, for the NCP1216 control chip, provides stable operating voltage.
3, pass through the excess current protective function of the CS end of NCP1216 control chip, make when CS end input voltage overruns, the NCP1216 control chip stops exporting pulse, protects the safety of whole circuit.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
As shown in Figure 1, the positive and negative switching power circuit of a kind of three-phase, be mainly the IGBT drive circuit power supply be provided, and the input voltage of the positive and negative switching power circuit of three-phase is the DC540V-800V voltage that three-phase electricity R, S, T obtain after the three-phase commutation bridge rectification.
Mainly comprise NCP1216 control chip, metal-oxide-semiconductor Q1, transformer T1 and multiple power supplies output unit, NCP1216 control chip output pwm signal is controlled the opening and closing of metal-oxide-semiconductor Q1, make input voltage process transformer T1 to multichannel power supply output unit, obtaining required voltage is the IGBT drive circuitry.
Transformer T1 is 32 pin transformers, and wherein 1,3,5 pin are armature winding, and pin 1 connects input power, and pin 5 connects metal-oxide-semiconductor Q1 emitter E; 7,8 pin are auxiliary secondary winding, and pin 7 connects the Vcc end of NCP1216, as the feeder ear of NCP1216, and pin 8 ground connection; 11, the secondary winding of 13 pin is the DC fan power output end; 15, the secondary winding of 16 pin is IGBT control single chip computer power output end; 22, the power output end that 23 pin are IGBT control single chip computer voltage detecting circuit; 19, the power output end that 20,21 pin are bridge drive circuit under IGBT; 24, one of power output end that 25,26 pin are the upper bridge drive circuit of IGBT; 27, one of power output end that 28,29 pin are the upper bridge drive circuit of IGBT; 30, one of power output end that 31,32 pin are the upper bridge drive circuit of IGBT.Noise through testing each secondary winding output is little, and working temperature can reach 125 degree.
The input of multiple power supplies output unit is the secondary winding of connection transformer T1 respectively, and output connects respectively load.The multiple power supplies output unit comprises power supply output unit and the DC fan power supply output unit of IGBT drive circuit power supply output unit, IGBT control single chip computer power supply output unit, IGBT control single chip computer voltage detecting circuit.
IGBT drive circuit power supply output unit comprises four secondary winding, wherein three secondary winding (24,25,26 pin; 27,28,29 pin; 30,31,32 pin) be respectively three IGBT drive circuitry of bridge, another one secondary winding (19,20,21 pin) is three IGBT drive circuitry of lower bridge.Four secondary winding all comprise two or three transformer T1 pins, two transformer T1 pins are respectively positive voltage and " 0 ", three transformer T1 pins are respectively positive voltage, " 0 " and negative voltage, due to the IGBT drive circuit when closing, negative voltage can be closed IGBT faster than " 0 ", therefore the present embodiment is preferably the scheme that secondary winding comprises three transformer T1 pins.
The first end of the armature winding of transformer T1, it is pin 1, connect input power, the second end of the armature winding of transformer T1, it is pin 5, the emitter E that connects metal-oxide-semiconductor Q1, diode D1 and resistance R 1 are connected in parallel between the first end and the second end of armature winding of transformer T1, and capacitor C 1 is in parallel with resistance R 1.The grid G of metal-oxide-semiconductor Q1 is connected with the Drv end of NCP1216 control chip by resistance R 2, and resistance R 2 is in parallel with diode D3, and the collector electrode C of metal-oxide-semiconductor Q1 is by resistance R 5 ground connection.The NCP1216 output pwm signal, when the output high level, metal-oxide-semiconductor Q1 opens, and when output low level, metal-oxide-semiconductor Q1 closes, and the waveform voltage of formation is converted to required voltage through the armature winding of transformer T1.The NCP1216 control chip belongs to the low energy consumption chip, direct driven MOS pipe Q1, and drive circuit reaches 500mA, and number of pin is few, and peripheral circuit is simple, function admirable.
The Vcc end of NCP1216 control chip is connected with input power by resistance R 3, when power initiation, can be the NCP1216 control chip startup power supply is provided, the first end of the auxiliary secondary winding of transformer T1, it is pin 7, by resistance R 4, diode D2, with the Vcc end of NCP1216 control chip, be connected, the second end of the auxiliary secondary winding of transformer T1, be pin 8 ground connection, after power initiation work, it is DC16V that auxiliary secondary winding obtains voltage by armature winding, for the NCP1216 control chip provides the operating voltage of lasting stability.
The collector electrode C of metal-oxide-semiconductor Q1 is connected with the CS end of NCP1216 control chip by resistance R 6; the CS end of NCP1216 control chip is the pin 3 of chip; play excess current protective function; when pin 3 input voltages surpass 1V; the NCP1216 control chip stops output pwm signal; thereby the cut-out circuit, play the effect of protective circuit.
The FB end of NCP1216 control chip connects the power supply stabilizing circuit, the power supply stabilizing circuit comprises the error current amplifier consisted of adjustable shunt regulator TL431, through optocoupler, hold to FB, the NCP1216 control chip is adjusted loop accurately by adjusting output signal, makes whole power work in stable state.
Use the Switching Power Supply of NCP1216 control chip, can accomplish that power volume is less, efficiency is higher, be applicable to the Switching Power Supply application scenario of middle low power output, with traditional UC384X, compare and there is better performance and effect.
As mentioned above, given scheme content, can derive similar technical scheme by reference to the accompanying drawings.In every case be the content that does not break away from technical solutions of the utility model, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all still belong in the scope of technical solutions of the utility model.
Claims (9)
1. the positive and negative switching power circuit of three-phase, it is characterized in that: comprise control chip, metal-oxide-semiconductor Q1, transformer T1 and multiple power supplies output unit, the first end of the armature winding of described transformer T1 connects input power, the second end of the armature winding of described transformer T1 connects the emitter E of metal-oxide-semiconductor Q1, the first end of the auxiliary secondary winding of described transformer T1 is by resistance R 4, diode D2 is connected with the Vcc end of described control chip, the second end ground connection of the auxiliary secondary winding of described transformer T1, the Vcc end of described control chip is connected with input power by resistance R 3, the grid G of described metal-oxide-semiconductor Q1 is connected with the Drv end of described control chip by resistance R 2, the collector electrode C of described metal-oxide-semiconductor Q1 is by resistance R 5 ground connection, the input of described multiple power supplies output unit connects respectively the secondary winding of described transformer T1, output connects respectively load.
2. the positive and negative switching power circuit of a kind of three-phase according to claim 1, it is characterized in that: described control chip is the NCP1216 control chip.
3. the positive and negative switching power circuit of a kind of three-phase according to claim 2 is characterized in that: the collector electrode C of described metal-oxide-semiconductor Q1 is connected with the CS end of NCP1216 control chip by resistance R 6, the formation circuit overcurrent protection.
4. the positive and negative switching power circuit of a kind of three-phase according to claim 2, it is characterized in that: also comprise the power supply stabilizing circuit, the power supply stabilizing circuit comprises the error current amplifier consisted of adjustable shunt regulator TL431, and described power supply stabilizing circuit is connected with the FB end of NCP1216 control chip by optocoupler.
5. the positive and negative switching power circuit of a kind of three-phase according to claim 1 is characterized in that: parallel diode D1 and resistance R 1 between the first end of the armature winding of described transformer T1 and the second end, and at resistance R 1 two ends shunt capacitance C1.
6. the positive and negative switching power circuit of a kind of three-phase according to claim 1, is characterized in that: at described resistance R 2 a two ends diode D3 in parallel.
7. the positive and negative switching power circuit of a kind of three-phase according to claim 1, it is characterized in that: described multiple power supplies output unit comprises power supply output unit and the DC fan power supply output unit of IGBT drive circuit power supply output unit, IGBT control single chip computer power supply output unit, IGBT control single chip computer voltage detecting circuit.
8. the positive and negative switching power circuit of a kind of three-phase according to claim 7, it is characterized in that: described IGBT drive circuit power supply output unit comprises four secondary winding, each secondary winding comprises three transformer T1 pins, three corresponding positive voltages of transformer T1 pin difference, " 0 " and negative voltage.
9. the positive and negative switching power circuit of a kind of three-phase according to claim 8, it is characterized in that: three secondary winding in described four secondary winding are respectively the power output end of three IGBT drive circuits of bridge, the power output end that another secondary winding is three IGBT drive circuits of lower bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320353757.XU CN203377806U (en) | 2013-06-19 | 2013-06-19 | Three-phase positive-negative switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320353757.XU CN203377806U (en) | 2013-06-19 | 2013-06-19 | Three-phase positive-negative switching power supply circuit |
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| Publication Number | Publication Date |
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| CN203377806U true CN203377806U (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320353757.XU Expired - Lifetime CN203377806U (en) | 2013-06-19 | 2013-06-19 | Three-phase positive-negative switching power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631602A (en) * | 2018-05-23 | 2018-10-09 | 广东伊莱斯电机有限公司 | A kind of accessory power supply being used in three level NPC AC synchronous samplings |
-
2013
- 2013-06-19 CN CN201320353757.XU patent/CN203377806U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631602A (en) * | 2018-05-23 | 2018-10-09 | 广东伊莱斯电机有限公司 | A kind of accessory power supply being used in three level NPC AC synchronous samplings |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
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| CX01 | Expiry of patent term |