CN202586319U - Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger - Google Patents
Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger Download PDFInfo
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- CN202586319U CN202586319U CN 201220161744 CN201220161744U CN202586319U CN 202586319 U CN202586319 U CN 202586319U CN 201220161744 CN201220161744 CN 201220161744 CN 201220161744 U CN201220161744 U CN 201220161744U CN 202586319 U CN202586319 U CN 202586319U
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- 238000004804 winding Methods 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000003071 parasitic effect Effects 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract description 2
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Abstract
The utility model discloses a processing circuit of phase-shifting full-bridge diode peak in a vehicle-mounted charger. A T1 secondary winding of a transformer of the vehicle-mounted charger accesses the input end of a rectifier bridge. Both ends of the output end of the rectifier bridge access the output ends of a power supply respectively through an inductor L2 and an inductor L3. The inductor L2 and the inductor L3 are respectively connected in parallel with an RCD absorbing circuit. A capacitor C1 is connected between the output ends of the power supply. According to the utility model, the circuit reduces the oscillation energy of the parasitic capacitance of a diode and the leakage inductance of the transformer, improves the efficiency, and inhibits the reverse peak of the rectifier diode; partial peak energy is released to the output ends through the diode and the capacitor, thus the loss is reduced; and the current sampling precision of the two inductors is greatly improved.
Description
Technical field
The utility model relates to the vehicle-mounted charge field, more specifically says to relate to a kind of treatment circuit that is used for vehicle-mounted charge machine phase-shifting full-bridge diode spike.
Background technology
In the electric automobile field, power battery pack voltage is usually at 200V even more than the 300V, and in the phase-shifting full-bridge scheme, the due to voltage spikes of rectifier diode is very high, and solution is used RC always, method such as rectifier diode series connection in " pulse-width modulation " book.During the vehicle mounted dynamic battery charging control precision of Current Control and voltage is had relatively high expectations.As when adopting single filter inductance, absorb with RC, playing certain effect though spike absorbed, resistance loss is excessive.Adopt its cost of spike TVS higher, in addition spike being absorbed is that to be based upon on the basis of loss overall efficiency low.Rectifier diode is connected, and is easy to solve the spike problem of diode, but transformer secondary two circles increase the coiling difficulty, have increased by four utmost point pipes, have increased cost, have increased loss.When in circuit, adopting single inductance, when detecting electric current if any sampling resistor, ohmically current waveform receives the influence of the vibration of diode, is difficult for accurately detecting current value.
The utility model content
The utility model technical problem to be solved suppresses the reverse spike and the not high problem of current sample precision of phase-shifting full-bridge diode in the vehicle-mounted charge machine.
To achieve these goals; The technical scheme that the utility model adopts is: the treatment circuit of phase-shifting full-bridge diode spike in a kind of vehicle-mounted charge machine; The multiple limit of its vehicle-mounted charge machine transformer T1 winding inserts the rectifier bridge input, and power output end is inserted through inductance L 2 and inductance L 3 respectively in described rectification bridge output end two ends; Described inductance L 2 is parallel with RCD respectively with inductance L 3 and absorbs circuit, is connected with capacitor C 1 between described power output end.
Described RCD absorption circuit is connected with diode with electric capacity by parallel resistor again and is constituted.
Be connected with power supply vdd terminal and GND end with lagging leg Q4 via lagging leg Q2 respectively again behind the winding one end series inductance L1 of the former limit of described transformer T1; The former limit winding other end is connected with power supply vdd terminal and GND end with leading-bridge Q3 via leading-bridge Q1 respectively.
The negative pole end of described power output end is provided with resistance R 3.
The advantage of the utility model is to have reduced the oscillation energy by the leakage inductance of diode parasitic capacitance and transformer; Improved efficient; The reverse spike that has suppressed rectifier diode through diode and electric capacity, is discharged into output with the spike portion of energy; Thereby reduced loss, and adopted two inductance that the current sample precision is improved a lot.
Description of drawings
Face the content of every width of cloth accompanying drawing expression in the utility model specification and the mark among the figure down and make brief description:
Fig. 1 is the circuit diagram of phase-shifting full-bridge diode spike treatment circuit in the vehicle-mounted charge machine.
Embodiment
Can know referring to Fig. 1, be connected with power supply vdd terminal and GND end with lagging leg Q4 via lagging leg Q2 respectively again behind the winding one end series inductance L1 of the former limit of vehicle-mounted charge machine transformer T1; The former limit winding other end is connected with power supply vdd terminal and GND end with leading-bridge Q3 via leading-bridge Q1 respectively; Leading-bridge Q1, lagging leg Q4 or lagging leg Q2, when leading-bridge Q3 switching tube is opened; Have energy to export to secondary from the former limit of transformer T1, its working condition is following:
1, leading-bridge Q1 and lagging leg Q4 open power output, and when leading-bridge Q1 turn-offs, the sense of current is still from A-P2-P1-L1-B-Q4, this moment, leading-bridge Q3 parasitic capacitance electric charge was taken away, and voltage descends, and opens leading-bridge Q3 then;
2, turn-off lagging leg Q4, electric current is given the charging of lagging leg Q4 parasitic capacitance, and lagging leg Q4 voltage rises; The drain-source voltage of lagging leg Q2 descends, and up to the conducting of lagging leg Q2 backward diode, lagging leg Q2 drain-source voltage is 0; Open lagging leg Q2 this moment, realize that no-voltage is open-minded, in the afterflow process; Mainly energy is provided, the whole conductings of rectifier diode by inductance;
When 3, opening lagging leg Q2, electric current is pressed the direction of VDD-Q2-L1-P1-P2-A-Q3, and to secondary output energy, at this moment, transformer secondary S1 end is output as positive voltage.
The multiple limit of transformer T1 winding inserts the rectifier bridge input; Rectifier bridge is made up of four diode D1-D4, and the positive voltage of above-mentioned steps 3 transformer secondary S1 end output is added in above the rectifier bridge D3, and the electric current of D3 is changed into by the D3-D4 direction and ending; Because there is parasitic capacitance in diode; Caused the electric capacity generation resonance of transformer T1 secondary leakage inductance and diode, can on diode D3, produce very high due to voltage spikes, made diode breakdown easily.Therefore power output end is inserted through two filter inductance L2 and L3 respectively in the rectification bridge output end two ends; And inductance L 2 is parallel with RCD respectively with inductance L 3 and absorbs circuit; Be connected with capacitor C 1 between power output end; Wherein RCD absorption circuit is connected with diode with electric capacity by parallel resistor again and is constituted, and the negative pole end of power output end is provided with resistance R 3.
Adopt RCD to absorb in inductance L 2 with inductance L 3 places, the spike problem of the effective absorption diode of meeting, U1 when spike occurring before inductance L 2 and the inductance L 3, peak voltage is higher than the voltage U 2 of capacitor C 2; Electric current charges to C2 through diode D6, and the sense of current is D6-C2-C1-D5-C3-D3-D4, the identical U3 that reaches of voltage before the voltage of C2 and inductance; Voltage is reduced to Us before the inductance afterwards, and Us＜U2＜U3＜U4 wherein is because the voltage of C2 is higher than Us; Diode D6 ends, and C2 is through resistance R 2 discharges, and U2 falls back in voltage again; C3 also just is equivalent to reduce to a lower U2 to due to voltage spikes U1, thereby plays the inhibition to the diode voltage spike through the R1 discharge.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all within the protection range of the utility model.
Claims (4)
1. the treatment circuit of phase-shifting full-bridge diode spike in the vehicle-mounted charge machine, the multiple limit of its vehicle-mounted charge machine transformer T1 winding inserts the rectifier bridge input, and power output ends are inserted through inductance L 2 and inductance L 3 respectively in described rectification bridge output end two ends; It is characterized in that: described inductance L 2 is parallel with RCD respectively with inductance L 3 and absorbs circuit, is connected with capacitor C 1 between described power output end.
2. treatment circuit according to claim 1 is characterized in that: described RCD absorption circuit is connected with diode with electric capacity by parallel resistor again and is constituted.
3. treatment circuit according to claim 1 and 2 is characterized in that: be connected with power supply vdd terminal and GND end with lagging leg Q4 via lagging leg Q2 respectively behind the winding one end series inductance L1 of the former limit of described transformer T1 again; The former limit winding other end is connected with power supply vdd terminal and GND end with leading-bridge Q3 via leading-bridge Q1 respectively.
4. treatment circuit according to claim 3 is characterized in that: the negative pole end of described power output end is provided with resistance R 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161744 CN202586319U (en) | 2012-04-17 | 2012-04-17 | Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161744 CN202586319U (en) | 2012-04-17 | 2012-04-17 | Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger |
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| CN202586319U true CN202586319U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220161744 Expired - Fee Related CN202586319U (en) | 2012-04-17 | 2012-04-17 | Processing circuit of phase-shifting full-bridge diode peak in vehicle-mounted charger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104519624A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-interference circuit and lamp |
| CN108322058A (en) * | 2017-12-28 | 2018-07-24 | 武汉合康动力技术有限公司 | One kind is in parallel based on the input of push-pull topology structure, exports concatenated converter |
-
2012
- 2012-04-17 CN CN 201220161744 patent/CN202586319U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104519624A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-interference circuit and lamp |
| CN108322058A (en) * | 2017-12-28 | 2018-07-24 | 武汉合康动力技术有限公司 | One kind is in parallel based on the input of push-pull topology structure, exports concatenated converter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20160417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |