CN207426965U - A kind of high-voltage DC power supply energy with failure feedback is released control circuit - Google Patents
A kind of high-voltage DC power supply energy with failure feedback is released control circuit Download PDFInfo
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- CN207426965U CN207426965U CN201721353116.9U CN201721353116U CN207426965U CN 207426965 U CN207426965 U CN 207426965U CN 201721353116 U CN201721353116 U CN 201721353116U CN 207426965 U CN207426965 U CN 207426965U
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Abstract
A kind of high-voltage DC power supply energy with failure feedback is released control circuit, is related to a kind of leadage circuit.Including resistance R9, R10, R11, R12, R13, bleeder resistance R14, DC power supply VDD, zener diode Q1, triode V2, photoelectrical coupler U1, resistance string X1 and IGBT module V1, current transformer T1；The utility model reduces element cost in design, while reduces the spatial volume shared by element compared with using the scheme of high-voltage relay.The utility model can realize " power supply interface voltage drops to below 60VDC in 1S after the charge connector disconnects " function of being required in safety standard well.Compared with using low-voltage dc power supply driving high pressure IGBT control bleeder resistance circuit switching schemes are isolated all the way, the utility model employs the circuit with failure feedback, whether has component failure with the signal multilevel iudge for receiving current transformer according to the charging signals that CPU control units are sent.
Description
Technical field
The utility model is related to a kind of leadage circuits, are specially that a kind of high-voltage DC power supply energy with failure feedback is let out
Put control circuit.
Background technology
Standard in direct-current charging post《GBT18487.1-2015 charging system General Requirements》Charging pile is distinctly claimed to possess
Power supply interface voltage drops to below 60VDC in 1S after bleed-off circuit guarantee charge connector disconnects.
Currently on the market because the accident that power resistor is burnt of releasing caused by leadage circuit design is unreasonable frequently occurs.
Current main-stream has two class high-voltage DC power supply energy leadage circuits to be applied in direct-current charging post, one kind be using all the way every
From low-voltage dc power supply driving high pressure IGBT control bleeder resistance circuit break-make, it is necessary to be additionally provided a DC voltage, lack
Point is to employ opened loop control（It only controls, signal is detected without feedback of status）, because output voltage is generally higher（It is several
Hectovolt）Once appearing in, IGBT is in the conduction state and DC power supplier is still in the situation of normal work, bleeder resistance
It is equivalent to be connected to output voltage both ends and discharge output voltage, it thus can be big because of follow current in circuit（Dozens of Ann
Training）Overheat is caused to burn.Another kind of is to control the conducting for power resistor of releasing, it is necessary to time control of discharging using high voltage direct current relay
Bleeder resistance is accessed in output voltage and discharged residual voltage in DC power supplier by relay contact closure processed.This
The shortcomings that kind scheme is that high voltage direct current relay cost is generally higher（Probably it is 20 times of the cost of IGBT）, while also do not have
Standby on off operating mode detects signal.
More than two class modes all because do not possess bleed-off circuit component failure detection function, result in power resistor of releasing and exist
The accident that abnormal conditions are burned out frequently occurs.
Utility model content
In order to solve current high voltage direct current leadage circuit because security risk caused by no state-detection feedback signal is asked
Topic improves direct-current charging post in the reliability released to output voltage, and the utility model provides a kind of to traditional IGBT controls
The high voltage direct current energy with failure feedback that is improved of leadage circuit release control circuit, increase failure feedback test section
Point, it realizes closed-loop control, can not only control leadage circuit, but also the wind that bleeder resistance is caused to burn that can fail to avoid key element
Danger.Guarantee system does not open DC power supply output in the case where power resistor of releasing is not turned off, it is ensured that system safety.
Realizing the technical solution of above-mentioned purpose is：A kind of high-voltage DC power supply energy that there is failure to feed back, which is released, controls electricity
Road, it is characterised in that：Including resistance R9, R10, R11, R12, R13, bleeder resistance R14, DC power supply VDD, zener diode
Q1, triode V2, photoelectrical coupler U1, resistance string X1 and IGBT module V1, current transformer T1；
One end of the resistance R11, one end of resistance R12 are connected with the B poles of triode V2, the other end of resistance R12 with
The E poles of triode V2 connect and are grounded, and the C poles of triode V2 are connected with 1 foot of photoelectrical coupler U1 input terminals, photoelectrical coupler
2 feet of U1 input terminals pass through resistance R10 connection DC power supplies VDD；
One end of bleeder resistance R14 is connected with one end of resistance string X1, the other end connection IGBT module of bleeder resistance R14
The C poles of V1, the other end of resistance string X1 connect the G poles of 4 feet of photoelectrical coupler U1 output terminals, IGBT module V1, IGBT respectively
The E poles of module V1 connect the anode of zener diode Q1, one end of resistance R9, cathode, the resistance R9 of zener diode Q1 respectively
The other end be connected with the G poles of IGBT module V1；
The E poles of the 1 foot connection IGBT module V1 of current transformer T1 primary sides, 2 feet of current transformer T1 primary sides connect
It connects 3 feet of photoelectrical coupler U1 output terminals, resistance R13 is connected between 3 feet of current transformer T1 secondary sides, 4 feet.
Further, the resistance string X1 is concatenated by multiple resistance.
The operation principle of the utility model will be described in detail in specific embodiment part.
The beneficial effects of the utility model：
The utility model is using the scheme of IGBT control access bleeder resistances, main element IGBT, bleeder resistance, photoelectricity
Coupler, current transformer and zener diode, with using high-voltage relay scheme compared with, reduce design in element into
This, while reduce the spatial volume shared by element.
The utility model can realize " the power supply interface in 1S after charge connector disconnects required in safety standard well
Voltage drops to below 60VDC " function.
Compared with using low-voltage dc power supply driving high pressure IGBT control bleeder resistance circuit switching schemes are isolated all the way, this
Utility model employs the circuit with failure feedback, according to the charging signals that CPU control units are sent with receiving Current Mutual Inductance
Whether the signal multilevel iudge of device has component failure.
In the prior art without IGBT on or off status feedback signals, can not avoid in the case where IGBT is turned on
High-voltage DC power supply is opened for a long time, power drain electrical resistance overheats is caused to burn, fire safety accident is caused to occur, and is influenced extremely
Badly.The detection feedback signal of IGBT conducting states is cleverly added in new utility model, monitors closed in leadage circuit in real time
The state of key elements judges whether leadage circuit exception occurs with reference to control signal, so as to ensure that the safe and reliable work of system
Make, avoid bleeder resistance and mistakenly accessed in output voltage and caused bleeder resistance because continuing high current and heating burnout,
Prevent charging pile equipment the security incidents such as to catch fire.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the fundamental diagram of existing charging pile.
Specific embodiment
The utility model discloses a kind of high-voltage DC power supply energy with failure feedback applied to charging pile for electric vehicle
Measure control circuit of releasing.
Existing electric automobile charging pile is as shown in Fig. 2, including charging control unit 1, leadage circuit 2, DC power supplier
3rd, contactor 4, electric vehicle 5 to be charged are connected to the output terminal of contactor 4.
DC power supplier 3, contactor 4 and electric vehicle 5 are sequentially connected in series to form charging circuit, DC power supplier 3
Input terminal connects power grid.The three-phase electricity that power grid comes is converted to the direct current that can be charged for electric vehicle 5 by DC power supplier 3
Pressure, the effect of contactor 4 is can to disconnect the connection of DC power supplier 3 and electric vehicle 5 at any time, protection electricity when exception charges
Electrical automobile 5 is from filling damage.
Charging control unit 1 connects leadage circuit 2, DC power supplier 3 and contactor 4, charging control unit 1 respectively
For controlling the opening and closing of DC power supplier 3, the opening and closing of contactor 4 and the work of leadage circuit 2.
Leadage circuit 2 is also connected with DC power supplier 3 simultaneously, is controlled by charging control unit 1 to DC power supplier 3
Output residual voltage discharge.
The utility model is mainly improved existing leadage circuit 2, provides a kind of new having and fails what is fed back
High-voltage DC power supply energy is released control circuit, including resistance R9, R10, R11, R12, R13, bleeder resistance R14, DC power supply
VDD, zener diode Q1, triode V2, photoelectrical coupler U1, resistance string X1 and IGBT module V1, current transformer T1.
One end of the resistance R11 connects charging control unit 1 shown in Fig. 2, for receiving charging control unit 1
Output drive signal, the other end of resistance R11, one end of resistance R12 are connected with the B poles of triode V2, the other end of resistance R12
It is connected and is grounded with the E poles of triode V2, the C poles of triode V2 are connected with 1 foot of photoelectrical coupler U1 input terminals, photoelectric coupling
2 feet of device U1 input terminals pass through resistance R10 connection DC power supplies VDD.
One end of bleeder resistance R14 is connected with one end of resistance string X1, the other end connection IGBT module of bleeder resistance R14
The C poles of V1, the other end of resistance string X1 connect the G poles of 4 feet of photoelectrical coupler U1 output terminals, IGBT module V1, IGBT respectively
The E poles of module V1 connect the anode of zener diode Q1, one end of resistance R9, cathode, the resistance R9 of zener diode Q1 respectively
The other end be connected with the G poles of IGBT module V1；
The E poles of the 1 foot connection IGBT module V1 of current transformer T1 primary sides, 2 feet of current transformer T1 primary sides connect
It connects 3 feet of photoelectrical coupler U1 output terminals, resistance R13 is connected between 3 feet of current transformer T1 secondary sides, 4 feet.
The resistance string X1 by resistance R1, R2, R3, R4, R5, R6, R7, R8 by being concatenated.It concatenates.
As the preferred of the present embodiment：The power supply electricity of charging control unit 1 may be employed in DC power supply VDD in this implementation
Source.
During utility model works, the anode of 3 output terminal of DC power supplier is connected to resistance string X1 and bleeder resistance R14
Between, 1 foot of the cathode connection current transformer T1 primary sides of 3 output terminal of DC power supplier.Current transformer T1 secondary sides
3 feet be connected with charging control unit 1, for by the current pulse signal of current transformer T1 secondary sides by resistance R13 convert
Charging control unit 1 is sent to for voltage signal.
The operation principle of the present embodiment：
When electric vehicle charges：Charging control unit 1 exports high level signal（Close to DC power supply VDD）When, by electricity
After resistance R11, R12 partial pressure triode V2 can be driven to be operated in saturation state, the 1-2 bipods of photoelectrical coupler U1 have electric current to lead to
It crosses, is reacted to 3-4 bipod saturation conductions, due to resistance very little between the 1-2 feet of current transformer T1, IGBT module V1's
G-E both end voltages are pulled to low-voltage（Close to 0V）, so IGBT module V1 is in cut-off working condition.Bleeder resistance R14 is not
It can be connected in the output voltage of DC power supplier 3, therefore leadage circuit is prohibited, DC power supplier 3 can be just at this time
Often output.Since bleeder resistance R14 is not linked into DC power supplier 3, electric current is can't detect on current transformer T1, and
The control signal that charging control unit 1 provides in charging process is high level, so with reference to the signal fed back, is judged just
Leadage circuit is normal when often charging.
When leadage circuit discharges：Charging control unit 1 exports low level signal（Close to 0V）When, triode V2 would operate in
Cut-off state, the 1-2 bipods of photoelectrical coupler U1 do not have current path, so the cut-off of 3-4 bipods disconnects.DC power supply mould simultaneously
The output voltage of block 3 passes through the G poles of resistance string X1 to IGBT module V1, because the limitation of zener diode Q1, IGBT module
Voltage is restricted to the voltage stabilizing value of zener diode Q1, and IGBT module V1 is operated in saturation conduction state, and bleeder resistance R14 is connect
Enter in output voltage, discharge output voltage.At this moment by bleeder resistance R14, the C-E poles of IGBT module V1, Current Mutual Inductance
The circuit of the 1-2 feet composition of device T1 primary sides generates a current impulse, and one is generated in the 3-4 feet of current transformer T1 secondary sides
It is a that certain pressure drop is generated by resistance R13 into the smaller current pulse signal of certain ratio, this current signal with primary side,
Feed back to charging control unit 1.Since the control signal that charging control unit 1 provides in charging process is low level, so knot
The signal fed back is closed, judges that leadage circuit is normal.
When there is element exception, this circuit can be with significant response：
1）When photoelectrical coupler U1 fails in normal charging process, the output voltage of DC power supplier 3 is by electricity
The G poles of resistance string X1 to IGBT module V1 so that IGBT module V1 is operated in saturation conduction state, and bleeder resistance R14 is accessed defeated
Go out in voltage, be at this moment made of the 1-2 feet of bleeder resistance R14, the C-E poles of IGBT module V1, current transformer T1 primary sides
Circuit generates a current impulse, and one is generated with primary side into certain ratio in the 3-4 feet of current transformer T1 secondary sides
Smaller current pulse signal, this current signal generate certain pressure drop by resistance R13, feed back to charging control unit 1.By
The control signal that charging control unit 1 provides in charging process is high level, so with reference to the signal fed back, is judged
Leadage circuit occurs abnormal.
2）When IGBT module V1 fails in normal charging process, as IGBT module V1 C-E between short circuit, at this moment direct current
The output voltage of source module 3 by bleeder resistance R14, IGBT module V1 C-E poles, the 1-2 feet of current transformer T1 primary sides
The circuit of composition generates a current impulse, and one is generated with primary side into certain in the 3-4 feet of current transformer T1 secondary sides
The smaller current pulse signal of ratio, this current signal generate certain pressure drop by resistance R13, feed back to charge control list
Member 1.Since the control signal that charging control unit 1 provides in charging process is high level, so with reference to the signal fed back,
It is abnormal to judge that leadage circuit occurs.
The advantages of the present embodiment is compared with existing leadage circuit：
The driving of the IGBT module V1 of the utility model is driven using the output voltage of DC power supplier 3, therefore is not required to
One is additionally provided with the output voltage of DC power supplier 3 voltage altogether to drive IGBT module V1.In combination with one
A zener diode Q1 and resistance R9 can realize that relatively low voltage can control entire leadage circuit.And technology is asked now
If topic is the output voltage of low-voltage dc power supply and DC power supplier 3 altogether, it is vulnerable to the invasion of high pressure, increases not
The risk of safety.
Current transformer circuit is added in the utility model, is believed by the secondary side high level pulse of current transformer T1
Number feed back to the conducting state of control system detection feedback IGBT module V1, i.e., it can be with Real-time Feedback by this pulse signal
The turn-on deadline state of IGBT module V1, so as to avoid in the pair of IGBT module V1 short-circuit failures or photoelectrical coupler U1
High-voltage DC power supply output is opened in the case of the open failure of side for a long time, power drain electrical resistance overheats is caused to burn, it is ensured that be
The security reliability of system.
The effect of resistance R9 in the utility model：When the G-E voltages of IGBT module V1 are in suspended state（Such as export electricity
When pressure drop is to certain voltage, when the G pole tensions of IGBT module V1 are less than the voltage stabilizing value of zener diode Q1）, by IGBT module
G-EIGBT voltage pull-downs, prevent IGBT module V1 because external interference high voltage injection G-E poles and cause at IGBT module V1
Cause state in saturation.
Resistance R1-R8 in the utility model needs to consider rated power and rated voltage, and 8 are used in the present embodiment
Resistance is connected.
Claims (2)
- The control circuit 1. a kind of high-voltage DC power supply energy that there is failure to feed back is released, it is characterised in that：Including resistance R9, R10, R11, R12, R13, bleeder resistance R14, DC power supply VDD, zener diode Q1, triode V2, photoelectrical coupler U1, Resistance string X1 and IGBT module V1, current transformer T1；One end of the resistance R11, one end of resistance R12 are connected with the B poles of triode V2, the other end of resistance R12 and three poles The E poles of pipe V2 connect and are grounded, and the C poles of triode V2 are connected with 1 foot of photoelectrical coupler U1 input terminals, and photoelectrical coupler U1 is defeated 2 feet for entering end pass through resistance R10 connection DC power supplies VDD；One end of bleeder resistance R14 is connected with one end of resistance string X1, the other end connection IGBT module V1's of bleeder resistance R14 C poles, the other end of resistance string X1 connect the G poles of 4 feet of photoelectrical coupler U1 output terminals, IGBT module V1, IGBT module respectively The E poles of V1 connect the anode of zener diode Q1, one end of resistance R9 respectively, the cathode of zener diode Q1, resistance R9 it is another One end is connected with the G poles of IGBT module V1；The E poles of the 1 foot connection IGBT module V1 of current transformer T1 primary sides, the 2 feet connection light of current transformer T1 primary sides 3 feet of electric coupler U1 output terminals connect resistance R13 between 3 feet of current transformer T1 secondary sides, 4 feet.
- The control circuit 2. a kind of high-voltage DC power supply energy that there is failure to feed back according to claim 1 is released, it is special Sign is：The resistance string X1 is concatenated by multiple resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721353116.9U CN207426965U (en) | 2017-10-20 | 2017-10-20 | A kind of high-voltage DC power supply energy with failure feedback is released control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721353116.9U CN207426965U (en) | 2017-10-20 | 2017-10-20 | A kind of high-voltage DC power supply energy with failure feedback is released control circuit |
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| CN207426965U true CN207426965U (en) | 2018-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612301A (en) * | 2017-10-20 | 2018-01-19 | 上海鼎充新能源技术有限公司 | A kind of high-voltage DC power supply energy with failure feedback is released control circuit |
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2017
- 2017-10-20 CN CN201721353116.9U patent/CN207426965U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612301A (en) * | 2017-10-20 | 2018-01-19 | 上海鼎充新能源技术有限公司 | A kind of high-voltage DC power supply energy with failure feedback is released control circuit |
| CN107612301B (en) * | 2017-10-20 | 2024-03-08 | 上海鼎充新能源技术有限公司 | High-voltage direct-current power supply energy release control circuit with failure feedback |
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