CN203933406U - A kind of high input voltage auxiliary power circuit - Google Patents
A kind of high input voltage auxiliary power circuit Download PDFInfo
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- CN203933406U CN203933406U CN201420357855.5U CN201420357855U CN203933406U CN 203933406 U CN203933406 U CN 203933406U CN 201420357855 U CN201420357855 U CN 201420357855U CN 203933406 U CN203933406 U CN 203933406U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 64
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- 239000003990 capacitor Substances 0.000 claims description 8
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- 238000004804 winding Methods 0.000 claims description 7
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Abstract
The utility model relates to a kind of high input voltage auxiliary power circuit, described circuit comprises switching tube combinational circuit, control circuit, flyback transformer, absorbing circuit, direct-flow input circuit, power supply circuits, current detection circuit, at least one secondary circuit, and described switching tube combinational circuit is connected with direct-flow input circuit, flyback transformer, control circuit, power supply circuits, testing circuit respectively; Described switching tube combinational circuit comprises metal-oxide-semiconductor Q1 and Q2, and TVS manages Z1, diode D1 and D2, current-limiting resistance R1; The grid of described metal-oxide-semiconductor Q1 is connected with pwm control circuit, and source electrode is connected with one end of current sense resistor R2, and drain electrode is connected with the source electrode of metal-oxide-semiconductor Q2; The drain electrode of described metal-oxide-semiconductor Q2 is connected with one end of flyback transformer T1, and grid is connected with the positive pole of clamping diode D1 with driving resistance R 1; The positive pole of described TVS pipe Z1 is connected with the source electrode of NMOS pipe Q1, and negative pole is connected with the grid of metal-oxide-semiconductor Q1; The negative pole of described clamping diode D1 is connected with one end of direct current input capacitance C1; The positive pole of described diode D1 is connected with power supply circuits Vcc, and negative pole is connected with driving resistance R 1; The mode that described switching tube combinational circuit adopts metal-oxide-semiconductor Q1 and Q2 to be connected in series, has reduced the shutoff voltage stress of metal-oxide-semiconductor, is suitable for the accessory power supply of high input voltage; TVS pipe Z1 is connected with drive circuit (R1 and D1) and clamp circuit D1's, has simplified metal-oxide-semiconductor Q2 drive circuit, has reduced cost.
Description
Technical field
The utility model patent relates to a kind of direct current side high-voltage input accessory power supply, and it is applied to wind electric converter and photovoltaic DC-to-AC converter field.
Background technology
Wind electric converter and photovoltaic DC-to-AC converter need to meet the requirement of electrical network low voltage crossing technology, when falling, line voltage to run without interruption, therefore need inverter must possess continual powersupply system, conventional scheme is to adopt UPS at present, but because the UPS battery life-span is short, operating temperature range narrow (0 ~ 40 degree), inverter power supply system reliability is reduced, therefore need to adopt a kind of accessory power supply from inverter direct-flow side power taking.
Inverter accessory power supply is generally multichannel output, therefore conventionally adopts inverse-excitation type accessory power supply, has following two kinds of modes:
As shown in Figure 2, single-ended reverse exciting transformation topology is simple in structure, with low cost, but main metal-oxide-semiconductor (Q1) need to bear DC bus-bar voltage (Vin) and secondary induced voltage (that is: n* (Vo+Vf)), also has transformer leakage inductance peak voltage, for wind electric converter (the specified 1100V of DC side busbar voltage), more than NMOS pipe need to be selected 1700V, the device that can buy is less and cost is higher, does not meet the demands.
As shown in Figure 3, double-transistor flyback transformation topology adopts metal-oxide-semiconductor (Q1 and Q2) to be connected in series to transformer two ends, and by clamping diode D1 and D2, transformer is carried out to clamp, reduced metal-oxide-semiconductor voltage stress (being approximately greater than DC bus-bar voltage Vin), for wind electric converter (the specified 1100V of DC side busbar voltage), more than metal-oxide-semiconductor need to be selected 1500V, relative cost is lower, but double-transistor flyback transformation topology needs an isolation drive transformer conventionally, has increased Material Cost.
Utility model content
The technical problems to be solved in the utility model is, for above-mentioned prior art, does not meet high voltage output and requirement cheaply, and a kind of switching tube combinational circuit is provided, and can meet the requirement of high input voltage, can realize low cost again.
The purpose of this utility model can realize by following technical proposal: a kind of high input voltage auxiliary power circuit, described high input voltage auxiliary circuit comprises switching tube combinational circuit, control circuit, flyback transformer, absorbing circuit, direct-flow input circuit, power supply circuits, current detection circuit, at least one secondary circuit, and described switching tube combinational circuit is connected with direct-flow input circuit, flyback transformer, control circuit, power supply circuits, testing circuit respectively; Described switching tube combinational circuit comprises metal-oxide-semiconductor Q1 and Q2, and TVS manages Z1, the first diode D1 the second diode and D2, current-limiting resistance R1; The grid of metal-oxide-semiconductor Q1 is connected with pwm control circuit, the source electrode of metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R2, the drain electrode of metal-oxide-semiconductor Q1 is connected with the source electrode of metal-oxide-semiconductor Q2, the drain electrode of metal-oxide-semiconductor Q2 is connected with one end of flyback transformer T1, and metal-oxide-semiconductor Q2 grid is connected with the positive pole of the first diode D1 with driving resistance R 1 respectively; The positive pole of TVS pipe Z1 is connected with the source electrode of metal-oxide-semiconductor Q1, and the negative pole of TVS pipe Z1 is connected with the grid of metal-oxide-semiconductor Q1; The negative pole of the first diode D1 is connected with one end of direct current input capacitance C1; The positive pole of the first diode D1 is connected with power supply circuits Vcc, and negative pole is connected with driving resistance R 1; The effect of described switching tube combinational circuit is that metal-oxide-semiconductor is connected in series, and improves input voltage range.
The C1 of described direct-flow input circuit is connected to current transformer DC bus side, and one end is connected with transformer one end, absorbing circuit and combinational circuit, and the other end is connected to common GND, and the C1 effect of described direct-flow input circuit is energy storage and filtering.
Described absorbing circuit comprises the 3rd diode D3, Absorption Capacitance C3, discharge resistance R3, and its two ends are connected to transformer two ends, and described absorbing circuit reduces switch tube voltage stress; Described flyback transformer comprises at least more than one secondary winding, and wherein a winding is the control circuit power supply of former limit, and power initiation R11 is to 2 chargings of power supply capacitor C.
Described secondary circuit comprises rectifier diode D4, filter capacitor C4 and load resistance R4.
A high input voltage auxiliary power circuit method of work, described method of work comprises to be opened and turn-offs two kinds of modes,
Opening process: pwm control circuit is sent out and driven signal to open metal-oxide-semiconductor Q1, and Q1 drain-source voltage Vds1 declines, when Vds1 voltage is less than driver supply power voltage, that is: during Vcc-Vd1, drive current is opened metal-oxide-semiconductor Q2 by R1, and electric current flows through metal-oxide-semiconductor Q1 and Q2;
Turn off process: pwm control circuit is sent out and driven signal to turn-off metal-oxide-semiconductor Q1, Q1 drain-source voltage Vds1 rises, when Vds1 voltage is greater than driver supply power voltage, that is: during Vcc-Vd1, metal-oxide-semiconductor Q2 turn-offs, Vds1 voltage continues to rise, the second diode D2 oppositely turn-offs, when Vds1 is greater than DC voltage Vin, the first diode D1 conducting, Vds1 by clamp to Vin, due to transformer demagnetizing effect, Q2 drain-source voltage Vds2 rises, bear secondary induced voltage, that is: n* (Vo+Vf) and transformer leakage inductance peak voltage, turn off process metal-oxide-semiconductor Q1 bears DC voltage Vin, metal-oxide-semiconductor Q1 bears secondary induced voltage, that is: n* (Vo+Vf) and transformer leakage inductance peak voltage.
Accompanying drawing explanation
Fig. 1 is the circuit topology of the utility model high input voltage accessory power supply;
Fig. 2 is single-ended reverse exciting transformation topology in prior art;
Fig. 3 is double-transistor flyback transformation topology in prior art;
Fig. 4 is a kind of embodiment of the utility model high input voltage accessory power supply.
Embodiment
As shown in Figure 1, the utility model patent relates to a kind of auxiliary power circuit from inverter direct-flow side power taking, described circuit comprises switching tube combinational circuit, control circuit, flyback transformer, absorbing circuit, direct-flow input circuit, power supply circuits, current detection circuit, at least one secondary circuit (comprising power supply winding), and described switching tube combinational circuit is connected with direct-flow input circuit, flyback transformer, control circuit, power supply circuits, testing circuit respectively.
Described switching tube combinational circuit comprises metal-oxide-semiconductor Q1 and Q2, and TVS manages Z1, diode D1 and D2, current-limiting resistance R1; The grid of described metal-oxide-semiconductor Q1 is connected with pwm control circuit, and source electrode is connected with one end of current sense resistor R2, and drain electrode is connected with the source electrode of metal-oxide-semiconductor Q2; The drain electrode of described metal-oxide-semiconductor Q2 is connected with one end of flyback transformer T1, and grid is connected with the positive pole of clamping diode D1 with driving resistance R 1; The positive pole of described TVS pipe Z1 is connected with the source electrode of NMOS pipe Q1, and negative pole is connected with the grid of metal-oxide-semiconductor Q1; The negative pole of described clamping diode D1 is connected with one end of direct current input capacitance C1; The positive pole of described diode D1 is connected with power supply circuits Vcc, and negative pole is connected with driving resistance R 1.
The mode that described switching tube combinational circuit adopts metal-oxide-semiconductor Q1 and Q2 to be connected in series, has reduced the shutoff voltage stress of metal-oxide-semiconductor, is suitable for the accessory power supply of high input voltage; TVS pipe Z1 is connected with drive circuit (R1 and D1) and clamp circuit D1's, has simplified metal-oxide-semiconductor Q2 drive circuit, has reduced cost.
Fig. 4 is embodiment of the present utility model, as shown in the figure, a kind of auxiliary power circuit from inverter direct-flow side power taking, described high input voltage auxiliary circuit comprises switching tube combinational circuit, control circuit, flyback transformer, absorbing circuit, direct-flow input circuit, power supply circuits, current detection circuit, at least one secondary circuit, and described switching tube combinational circuit is connected with direct-flow input circuit, flyback transformer, control circuit, power supply circuits, testing circuit respectively.
Described switching tube combinational circuit comprises metal-oxide-semiconductor Q1 and Q2, and TVS manages Z1, the first diode D1 the second diode and D2, current-limiting resistance R1; The grid of metal-oxide-semiconductor Q1 is connected with pwm control circuit, the source electrode of metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R2, the drain electrode of metal-oxide-semiconductor Q1 is connected with the source electrode of metal-oxide-semiconductor Q2, the drain electrode of metal-oxide-semiconductor Q2 is connected with one end of flyback transformer T1, and metal-oxide-semiconductor Q2 grid is connected with the positive pole of the first diode D1 with driving resistance R 1 respectively; The positive pole of TVS pipe Z1 is connected with the source electrode of metal-oxide-semiconductor Q1, and the negative pole of TVS pipe Z1 is connected with the grid of metal-oxide-semiconductor Q1; The negative pole of the first diode D1 is connected with one end of direct current input capacitance C1; The positive pole of the first diode D1 is connected with power supply circuits Vcc, and negative pole is connected with driving resistance R 1; The effect of described switching tube combinational circuit is that metal-oxide-semiconductor is connected in series, and improves input voltage range.
The C1 of described direct-flow input circuit is connected to current transformer DC bus side, and one end is connected with transformer one end, absorbing circuit and combinational circuit, and the other end is connected to common GND, and the C1 effect of described direct-flow input circuit is energy storage and filtering.
Described absorbing circuit comprises the 3rd diode D3, Absorption Capacitance C3, discharge resistance R3, and its two ends are connected to transformer two ends, and described absorbing circuit reduces switch tube voltage stress; Described flyback transformer comprises at least more than one secondary winding, and wherein a winding is the control circuit power supply of former limit, and power initiation R11 is to 2 chargings of power supply capacitor C.
Described secondary circuit comprises rectifier diode D4, filter capacitor C4 and load resistance R4.
Described control circuit comprises former limit pwm chip, oscillating circuit, feedback optocoupler U2 and feedback network, described model is UCC184* series, described oscillating circuit is comprised of resistance R 10 and capacitor C 6, and described feedback network is to consist of TL431, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, capacitor C 5.
A high input voltage auxiliary power circuit method of work, described method of work comprises to be opened and turn-offs two kinds of modes,
Opening process: pwm control circuit is sent out and driven signal to open metal-oxide-semiconductor Q1, and Q1 drain-source voltage Vds1 declines, when Vds1 voltage is less than driver supply power voltage, that is: during Vcc-Vd1, drive current is opened metal-oxide-semiconductor Q2 by R1, and electric current flows through metal-oxide-semiconductor Q1 and Q2;
Turn off process: pwm control circuit is sent out and driven signal to turn-off metal-oxide-semiconductor Q1, Q1 drain-source voltage Vds1 rises, when Vds1 voltage is greater than driver supply power voltage, that is: during Vcc-Vd1, metal-oxide-semiconductor Q2 turn-offs, Vds1 voltage continues to rise, the second diode D2 oppositely turn-offs, when Vds1 is greater than DC voltage Vin, the first diode D1 conducting, Vds1 by clamp to Vin, due to transformer demagnetizing effect, Q2 drain-source voltage Vds2 rises, and bears secondary induced voltage, that is: n* (Vo+Vf) and transformer leakage inductance peak voltage.Therefore, turn off process metal-oxide-semiconductor Q1 bears DC voltage Vin, and metal-oxide-semiconductor Q1 bears secondary induced voltage, that is: n* (Vo+Vf) and transformer leakage inductance peak voltage.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (4)
1. a high input voltage auxiliary power circuit, it is characterized in that: described high input voltage auxiliary circuit comprises switching tube combinational circuit, control circuit, flyback transformer, absorbing circuit, direct-flow input circuit, power supply circuits, current detection circuit, at least one secondary circuit, described switching tube combinational circuit is connected with direct-flow input circuit, flyback transformer, control circuit, power supply circuits, testing circuit respectively; Described switching tube combinational circuit comprises metal-oxide-semiconductor Q1 and Q2, and TVS manages Z1, the first diode D1 the second diode and D2, current-limiting resistance R1; The grid of metal-oxide-semiconductor Q1 is connected with pwm control circuit, the source electrode of metal-oxide-semiconductor Q1 is connected with one end of current sense resistor R2, the drain electrode of metal-oxide-semiconductor Q1 is connected with the source electrode of metal-oxide-semiconductor Q2, the drain electrode of metal-oxide-semiconductor Q2 is connected with one end of flyback transformer T1, and metal-oxide-semiconductor Q2 grid is connected with the positive pole of the first diode D1 with driving resistance R 1 respectively; The positive pole of TVS pipe Z1 is connected with the source electrode of metal-oxide-semiconductor Q1, and the negative pole of TVS pipe Z1 is connected with the grid of metal-oxide-semiconductor Q1; The negative pole of the first diode D1 is connected with one end of direct current input capacitance C1; The positive pole of the first diode D1 is connected with power supply circuits Vcc, and negative pole is connected with driving resistance R 1; The effect of described switching tube combinational circuit is that metal-oxide-semiconductor is connected in series, and improves input voltage range.
2. a kind of high input voltage auxiliary power circuit according to claim 1, it is characterized in that: the C1 of described direct-flow input circuit is connected to current transformer DC bus side, one end is connected with transformer one end, absorbing circuit and combinational circuit, the other end is connected to common GND, and the C1 effect of described direct-flow input circuit is energy storage and filtering.
3. a kind of high input voltage auxiliary power circuit according to claim 2, it is characterized in that: described absorbing circuit comprises the 3rd diode D3, Absorption Capacitance C3, discharge resistance R3, its two ends are connected to transformer two ends, and described absorbing circuit reduces switch tube voltage stress; Described flyback transformer comprises at least more than one secondary winding, and wherein a winding is the control circuit power supply of former limit, and power initiation R11 is to 2 chargings of power supply capacitor C.
4. a kind of high input voltage auxiliary power circuit according to claim 3, is characterized in that: described secondary circuit comprises rectifier diode D4, filter capacitor C4 and load resistance R4.
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| CN201420357855.5U CN203933406U (en) | 2014-07-01 | 2014-07-01 | A kind of high input voltage auxiliary power circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038072A (en) * | 2014-07-01 | 2014-09-10 | 浙江海得新能源有限公司 | High-voltage input auxiliary power circuit |
| CN104092383A (en) * | 2014-07-01 | 2014-10-08 | 浙江海得新能源有限公司 | High-voltage input auxiliary power supply circuit and working method thereof |
| CN104600967A (en) * | 2015-01-07 | 2015-05-06 | 北京天诚同创电气有限公司 | high-voltage direct-current power supply circuit |
| CN105591540A (en) * | 2015-11-16 | 2016-05-18 | 浙江凯耀照明股份有限公司 | Auxiliary direct current low-voltage power supply circuit applicable to switch power supply |
| CN108269714A (en) * | 2017-12-12 | 2018-07-10 | 上海海得控制系统股份有限公司 | Relay crowbar circuit and control device |
| CN105896999B (en) * | 2015-01-20 | 2018-07-27 | 扬州大学 | A kind of current detection circuit combined by blocking diode and biasing diode |
| CN108377093A (en) * | 2018-04-13 | 2018-08-07 | 深圳鹏城新能科技有限公司 | A kind of ACRCD clamp circuits preventing single-phase photovoltaic inversion topology power pipe over-voltage breakdown |
| CN116995907A (en) * | 2023-08-02 | 2023-11-03 | 润新微电子(大连)有限公司 | Power module, bridge flyback topology circuit and switching power supply |
-
2014
- 2014-07-01 CN CN201420357855.5U patent/CN203933406U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038072A (en) * | 2014-07-01 | 2014-09-10 | 浙江海得新能源有限公司 | High-voltage input auxiliary power circuit |
| CN104092383A (en) * | 2014-07-01 | 2014-10-08 | 浙江海得新能源有限公司 | High-voltage input auxiliary power supply circuit and working method thereof |
| CN104600967A (en) * | 2015-01-07 | 2015-05-06 | 北京天诚同创电气有限公司 | high-voltage direct-current power supply circuit |
| CN104600967B (en) * | 2015-01-07 | 2017-12-29 | 北京天诚同创电气有限公司 | High-voltage direct-current power supply circuit |
| CN105896999B (en) * | 2015-01-20 | 2018-07-27 | 扬州大学 | A kind of current detection circuit combined by blocking diode and biasing diode |
| CN105591540A (en) * | 2015-11-16 | 2016-05-18 | 浙江凯耀照明股份有限公司 | Auxiliary direct current low-voltage power supply circuit applicable to switch power supply |
| CN108269714A (en) * | 2017-12-12 | 2018-07-10 | 上海海得控制系统股份有限公司 | Relay crowbar circuit and control device |
| CN108377093A (en) * | 2018-04-13 | 2018-08-07 | 深圳鹏城新能科技有限公司 | A kind of ACRCD clamp circuits preventing single-phase photovoltaic inversion topology power pipe over-voltage breakdown |
| CN108377093B (en) * | 2018-04-13 | 2023-11-07 | 深圳鹏城新能科技有限公司 | ACRCD clamping circuit for preventing overvoltage breakdown of single-phase photovoltaic inversion topological power tube |
| CN116995907A (en) * | 2023-08-02 | 2023-11-03 | 润新微电子(大连)有限公司 | Power module, bridge flyback topology circuit and switching power supply |
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Granted publication date: 20141105 Termination date: 20210701 |