CN208782478U - Anti-misoperation high-voltage discharge circuit - Google Patents
Anti-misoperation high-voltage discharge circuit Download PDFInfo
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- CN208782478U CN208782478U CN201821447210.5U CN201821447210U CN208782478U CN 208782478 U CN208782478 U CN 208782478U CN 201821447210 U CN201821447210 U CN 201821447210U CN 208782478 U CN208782478 U CN 208782478U
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- high voltage
- power supply
- switch pipe
- discharge switch
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- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 43
- 210000001699 lower leg Anatomy 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 8
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000007257 malfunction Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 230000002459 sustained effect Effects 0.000 abstract 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 208000012661 Dyskinesia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a prevent malfunction high pressure bleeder circuit among the direct current fills electric pile technical field, including voltage stabilizing circuit, prevent malfunction circuit and execution circuit, voltage stabilizing circuit is connected with high voltage power supply, voltage stabilizing circuit's output and opto-coupler are connected, the opto-coupler still with auxiliary power supply, single chip microcomputer control signal connects, prevent that fifth resistance in the malfunction circuit is connected with the opto-coupler, first discharge switch pipe and third electric capacity are connected to the other end of fifth resistance, high voltage power supply is connected to the other end of first discharge switch pipe and third electric capacity, fourth resistance is connected with the opto-coupler among the execution circuit, first discharge switch pipe is connected to the other end of fourth resistance, the second discharge switch pipe passes through metal casing resistance and high voltage power supply's anodal connection. The utility model discloses can effectively avoid the direct current charger working process in, not shut down at rectifier module, during the output sustained voltage, the damage of the discharge resistance that the return circuit mistake of releasing dropped into arouses, discharge switch pipe, burn out.
Description
Technical field
The utility model relates to direct-current charging post technical fields, in particular to a kind of false action-proof high voltage relief
Circuit.
Background technique
According to national standards: " GBT 18487.1-2015 electric car conduction charging system part 1: General Requirement "
Requirement, DC charging motor stops filling in shutdown, Insulation monitoring after the completion of shut down, rectification module shuts down under both of these case, releases
Circuit carries out high voltage relief to charger high voltage direct current output end.That is: after rectification module shutdown, leadage circuit is devoted oneself to work,
Voltage in voltage 1 second on rectification module output capacitor need to be made to drop below 60Vdc, to ensure the safety of charging operations
Property.
The work premise of leadage circuit must be rectification module shutdown, it may be assumed that leadage circuit was released is rectification module shutdown
Its output capacitance residual voltage later.And in practical applications, can occur missing due to interference or SCM program, instruction once in a while
Movement, in the case where not shutting down in rectification module, normally export continuous voltage, bleed-off circuit can miscarry into, act, as a result,
Burn bleeder resistance, discharge switch pipe (metal-oxide-semiconductor or IGBT).
Drawbacks described above is worth improving.
Summary of the invention
In order to overcome the shortcomings of existing technology, the utility model provides a kind of false action-proof high voltage relief circuit, utilizes
The charging delay characteristic of capacitor controls the running time of leadage circuit at 1.5 seconds or so, it is possible to prevente effectively from direct current fills
In the motor course of work, do not shut down in rectification module, export continuous voltage when, bleed-off circuit miscarry into caused bleeder resistance,
The damage of discharge switch pipe is burnt out.
Technical solutions of the utility model are as described below:
A kind of false action-proof high voltage relief circuit, which is characterized in that including voltage regulator circuit, false action-proof circuit and execution
Circuit:
The voltage regulator circuit and the anode of high voltage power supply, cathode connect, and the of the output end of the voltage regulator circuit and optocoupler
The connection of four feet, the first foot of the optocoupler are connect with accessory power supply VDD, and crus secunda connects monolithic machine control signal CTR, the
Three feet and the false action-proof circuit connection；
In the false action-proof circuit, one end of the 5th resistance R5 connects the optocoupler with the cathode of first diode D1
Third foot, the other end of the 5th resistance R5 connects the first discharge switch pipe Q1's with the anode of the first diode D1
First foot and third capacitor C3, the third foot of the first discharge switch pipe Q1 connect institute with the other end of the third capacitor C3
The cathode of high voltage power supply is stated, the crus secunda of the first discharge switch pipe Q1 connects the execution circuit；
In the execution circuit, the 4th resistance R4 is connect with the third foot of the optocoupler, and the 4th resistance R4's is another
One end connects the crus secunda, the 4th capacitor C4 of 3rd resistor R3 and the second discharge switch pipe Q2 of the first discharge switch pipe Q1
The first foot, the other end and the second discharge switch pipe of the other end of the 3rd resistor R3, the 4th capacitor C4
The third foot of Q2 is all connected with the cathode of the high voltage power supply, and the crus secunda of the second discharge switch pipe Q2 passes through metal shell electricity
It hinders and is connect with the anode of the high voltage power supply.
According to the utility model of above scheme, which is characterized in that the high voltage power supply is 200-750Vdc high voltage power supply.
According to the utility model of above scheme, which is characterized in that the voltage regulator circuit includes resistance to piezoresistance, first capacitor
C1, the second capacitor C2 and zener diode Z1, one end of the resistance to piezoresistance connect the anode of the high voltage power supply, the other end
It is connect respectively with the cathode of the first capacitor C1, the second capacitor C2 and the zener diode Z1, the first capacitor C1
The other end, the second capacitor C2 the other end and the zener diode Z1 anode it is negative with the high voltage power supply
Pole connection.
Further, the resistance to piezoresistance includes multiple concatenated resistance.
Further, the resistance to piezoresistance includes the 6th resistance R6 and the 7th resistance R7 being serially connected.
Further, the first capacitor C1 is electrolytic capacitor.
According to the utility model of above scheme, which is characterized in that the first foot of the optocoupler by the 8th resistance R8 with
Accessory power supply VDD connection.
According to the utility model of above scheme, which is characterized in that the accessory power supply is 18Vdc power supply.
According to the utility model of above scheme, which is characterized in that the metal shell resistance includes be serially connected
One resistance R1 and second resistance R2.
According to the utility model of above scheme, which is characterized in that the first discharge switch pipe Q1 is N-type metal-oxide-semiconductor,
Grid connects the other end of the 5th resistance R5, and source electrode connects the cathode of the high voltage power supply, drain electrode and the 4th resistance
R4 is connected with the midpoint of the 3rd resistor R3.
According to the utility model of above scheme, which is characterized in that the second discharge switch pipe Q2 is N-type metal-oxide-semiconductor,
Grid is connect with the midpoint of the 4th resistance R4 and 3rd resistor R3, and drain electrode connects the metal shell resistance,
Source electrode connects the cathode of the high voltage power supply.
According to the utility model of above scheme, which is characterized in that the second discharge switch pipe Q2 is igbt transistor,
Its grid is connect with the midpoint of the 4th resistance R4 and 3rd resistor R3, and collector connects the metal shell electricity
Resistance, emitter connect the cathode of the high voltage power supply.
According to the utility model of above scheme, the beneficial effect is that:
This it is practical newly do not influence normal leadage circuit work under the premise of, even if occur leadage circuit control malfunction
Make, bleed-off circuit is automatically stopped work after work 1.5 seconds or so.To avoid the burning of bleeder resistance, discharge switch pipe
It is bad；The utility model circuit is simple, has reliable, low in energy consumption, at low cost advantage, can be made in different systems
With flexible；The entire circuit power consumption of the utility model is small, control is flexible, realizes that high and low voltage isolation, whole system are safe and reliable；It is not required to
Want additional auxiliary power supply circuit that can work normally, entire circuit has very big advantage, Ke Yijia in installation and volume
Work is at circuit unit.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
With reference to the accompanying drawing and the utility model is further described in embodiment:
As shown in Figure 1, a kind of false action-proof high voltage relief circuit, including voltage regulator circuit, false action-proof circuit and execute electricity
Road.
1, voltage regulator circuit
Voltage regulator circuit is connect with anode, the cathode of high voltage power supply (200-750Vdc).Specifically, voltage regulator circuit includes pressure resistance
Resistance, first capacitor C1, the second capacitor C2 and zener diode Z1.
Resistance to piezoresistance one end connection high voltage power supply anode, the other end respectively with first capacitor C1, the second capacitor C2
And the cathode connection of zener diode Z1, two pole of the other end of first capacitor C1, the other end of the second capacitor C2 and pressure stabilizing
The anode of pipe Z1 is connect with the cathode of high voltage power supply.
Preferably, first capacitor C1 is electrolytic capacitor.Resistance to piezoresistance includes multiple concatenated resistance, resistance in the present embodiment
Piezoresistance includes the 6th resistance R6 and the 7th resistance R7 being serially connected.
The output end of voltage regulator circuit is connect with the 4th foot of optocoupler OT, the 8th resistance R8 of the first foot and auxiliary electricity of optocoupler OT
Source VDD(the present embodiment is 18Vdc) connection, crus secunda connection monolithic machine control signal CTR, third foot and false action-proof electricity
Road connection.Optocoupler OT is control optocoupler, and releasing from single-chip microcontroller, which controls signal, will be such that optocoupler OT is connected, and carries out control of releasing
System.
2, false action-proof circuit
In false action-proof circuit, one end of the 5th resistance R5 connects the third of optocoupler with the cathode of first diode D1
Foot, the other end of the 5th resistance R5 connect the first foot and third electricity of the first discharge switch pipe Q1 with the anode of first diode D1
Hold C3, the third foot of the first discharge switch pipe Q1 connects the cathode of high voltage power supply, the first electric discharge with the other end of third capacitor C3
The crus secunda of switching tube Q1 connects execution circuit.
3, execution circuit
In execution circuit, the third foot of the 4th resistance R4 and optocoupler is connected, the other end connection first of the 4th resistance R4
First foot of the crus secunda of discharge switch pipe Q1, the 4th capacitor C4 of 3rd resistor R3 and the second discharge switch pipe Q2, third electricity
The other end, the other end of the 4th capacitor C4 and the third foot of the second discharge switch pipe Q2 of resistance R3 is all connected with the negative of high voltage power supply
The crus secunda of pole, the second discharge switch pipe Q2 is connected by the anode of metal shell resistance and high voltage power supply.
Preferably, metal shell resistance includes the first resistor R1 and second resistance R2 being serially connected.
Discharge switch pipe can be metal-oxide-semiconductor or igbt transistor.Wherein: the first discharge switch pipe Q1 is low current, low electricity
The N-type metal-oxide-semiconductor of pressure, grid connect the other end of the 5th resistance R5, and source electrode connects the cathode of high voltage power supply, drain electrode and the
Four resistance R4 are connected with the midpoint of 3rd resistor R3；Second discharge switch pipe Q2 is the N-type metal-oxide-semiconductor of high voltage, high current, grid
Pole is connect with the midpoint of the 4th resistance R4 and 3rd resistor R3, and drain electrode connection metal shell resistance, source electrode connects high-voltage electricity
The cathode in source.
In addition, the second discharge switch pipe Q2 is igbt transistor, in grid and the 4th resistance R4 and 3rd resistor R3
Point connection, collector connect metal shell resistance, and emitter connects the cathode of high voltage power supply.
The course of work of the utility model is as follows:
1, charger works normally
When charger works normally, rectification module is also being worked normally, high-voltage power cathode DC+, high voltage power supply cathode DC-
Between voltage be 200-750Vdc high pressure.6th resistance R6, the 7th resistance R7, zener diode Z1, first capacitor C1, second
The voltage regulator circuit of capacitor C2 composition, can make T1 obtain stable accessory power supply vdd voltage.
In the process, the capacity of first capacitor C1 is sufficiently large, it is ensured that high-voltage power cathode DC+, high voltage power supply cathode DC-
Voltage when be released in 1 second lower than 60Vdc, the voltage of T1 is still to that the power supply of subsequent control circuit can be maintained.
2, normal movement of releasing
DC charging motor stops filling in shutdown, Insulation monitoring after the completion of shut down, rectification module shuts down under both of these case, releases
Circuit carries out high voltage relief to charger high voltage direct current output end.
That is: monolithic machine control signal CTR becomes low level, and optocoupler OT conducting (1,3 feet of OT-A are connected), T2 is assisted
Supply voltage, 3rd resistor R3, the 4th resistance R4 partial pressure (i.e. the VGS voltage of T4 voltage, the second discharge switch pipe Q2) be higher than
The GS threshold voltage of second discharge switch pipe Q2, the DS conducting of the second discharge switch pipe Q2, metal shell resistance (first resistor
R1, second resistance R2) it discharges the residual voltage of rectification module output capacitance, within 1S, so that high-voltage power cathode
Voltage drop between DC+, high voltage power supply cathode DC- is as low as 60Vdc hereinafter, completing movement of releasing.
At the same time, while T2 obtains accessory power supply vdd voltage, first capacitor C1 will be carried out by the 5th resistance R5
Charging, voltage rise, and 1.5 seconds or so, T3 voltage (i.e. the VGS voltage of the first discharge switch pipe Q1) was higher than its threshold voltage, the
The DS of one discharge switch pipe Q1 is connected, the T4(i.e. VGS voltage of the second discharge switch pipe Q2) it is pulled low, the second discharge switch pipe Q2
Shutdown, --- complete false action-proof.That is: the longest turn-on time of the second discharge switch pipe Q2 will be limited in 1.5 seconds or so, protect
Demonstrate,prove the safety of the second discharge switch pipe Q2, first resistor R1, second resistance R2.
The effect of first diode D1 is: after completing false action-proof function, the voltage on first capacitor C1 bled off, with
Just circuit next time is devoted oneself to work.
3, abnormal movement of releasing
Rectification module not yet shuts down, and due to interference or SCM program, instruction malfunction, does not shut down in rectification module, just
Often output continuous voltage in the case where, bleed-off circuit can miscarry into, act.The movement of each device is the same as movement of normally releasing in circuit
Process.
That is: monolithic machine control signal CTR becomes low level, and optocoupler OT conducting (1,3 feet of OT-A are connected), T2 is assisted
Power supply vdd voltage, 3rd resistor R3, the partial pressure (i.e. the VGS voltage of T4 voltage, the second discharge switch pipe Q2) of the 4th resistance R4 are high
It is connected in the DS of the GS threshold voltage of the second discharge switch pipe Q2, the second discharge switch pipe Q2, metal shell resistance (first resistor
R1, second resistance R2) DS that has been connected by the second discharge switch pipe Q2, to rectification module export continuous voltage DC+, DC- into
Row electric discharge.This electric discharge is very dangerous, because mould rectification module does not shut down, first resistor R1, second resistance R2 second are put
The DS that electric switch pipe Q2 has been connected will be always worked under continuous high-pressure, high-voltage power cathode DC+, high voltage power supply cathode DC-
Voltage can not reduce, the duration is slightly long, and first resistor R1, second resistance R2, the second discharge switch pipe Q2 will be burned, and be made
At serious accident.
The utility model can burning to avoid bleeder resistance and discharge switch pipe.Specifically, obtaining accessory power supply in T2
While vdd voltage, first capacitor C1 will be charged by the 5th resistance R5, and voltage rises, 1.5 seconds or so T3 voltage
(i.e. the VGS voltage of the first discharge switch pipe Q1) is higher than its threshold voltage, and the DS of the first discharge switch pipe Q1 is connected, T4(i.e. the
The VGS voltage of two discharge switch pipe Q2) it is pulled low, the second discharge switch pipe Q2 shutdown, --- complete false action-proof.That is: second
The longest turn-on time of discharge switch pipe Q2 will be limited in 1.5 seconds or so, guarantee the second discharge switch pipe Q2, first resistor
The safety of R1, second resistance R2.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Illustrative description is carried out to the utility model patent above in conjunction with attached drawing, it is clear that the reality of the utility model patent
It is now not subject to the restrictions described above, as long as being carried out using the method concept and technical solution of the utility model patent various
Improve, or it is not improved the conception and technical scheme of the utility model patent are directly applied into other occasions, in this reality
With in novel protection scope.
Claims (10)
1. a kind of false action-proof high voltage relief circuit, which is characterized in that including voltage regulator circuit, false action-proof circuit and execute electricity
Road:
The voltage regulator circuit and the anode of high voltage power supply, cathode connect, the output end of the voltage regulator circuit and the 4th foot of optocoupler
Connection, the first foot of the optocoupler are connect with accessory power supply VDD, and crus secunda connects monolithic machine control signal CTR, third foot
With the false action-proof circuit connection；
In the false action-proof circuit, one end of the 5th resistance R5 connects the of the optocoupler with the cathode of first diode D1
Three feet, the other end of the 5th resistance R5 connect the first of the first discharge switch pipe Q1 with the anode of the first diode D1
Foot and third capacitor C3, the third foot of the first discharge switch pipe Q1 connect the height with the other end of the third capacitor C3
The crus secunda of the cathode of voltage source, the first discharge switch pipe Q1 connects the execution circuit；
In the execution circuit, the 4th resistance R4 is connect with the third foot of the optocoupler, the other end of the 4th resistance R4
Connect the of the crus secunda of the first discharge switch pipe Q1, the 4th capacitor C4 of 3rd resistor R3 and the second discharge switch pipe Q2
One foot, the other end of the 3rd resistor R3, the other end of the 4th capacitor C4 and the second discharge switch pipe Q2
Third foot is all connected with the cathode of the high voltage power supply, the crus secunda of the second discharge switch pipe Q2 by metal shell resistance with
The anode connection of the high voltage power supply.
2. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the high voltage power supply is 200-
750Vdc high voltage power supply.
3. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the voltage regulator circuit includes pressure resistance
Resistance, first capacitor C1, the second capacitor C2 and zener diode Z1, one end of the resistance to piezoresistance connect the high voltage power supply
Anode, the other end are connect with the cathode of the first capacitor C1, the second capacitor C2 and the zener diode Z1 respectively, institute
State the anode of the other end of first capacitor C1, the other end of the second capacitor C2 and the zener diode Z1 with it is described
The cathode of high voltage power supply connects.
4. false action-proof high voltage relief circuit according to claim 3, which is characterized in that the resistance to piezoresistance includes multiple
Concatenated resistance.
5. false action-proof high voltage relief circuit according to claim 3, which is characterized in that the first capacitor C1 is electrolysis
Capacitor.
6. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the first foot of the optocoupler passes through
8th resistance R8 is connect with accessory power supply VDD.
7. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the metal shell resistance includes
The first resistor R1 and second resistance R2 being serially connected.
8. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the first discharge switch pipe Q1
For N-type metal-oxide-semiconductor, grid connects the other end of the 5th resistance R5, and source electrode connects the cathode of the high voltage power supply, drain electrode with
The 4th resistance R4 is connected with the midpoint of the 3rd resistor R3.
9. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the second discharge switch pipe Q2
For N-type metal-oxide-semiconductor, grid is connect with the midpoint of the 4th resistance R4 and 3rd resistor R3, and drain electrode connects the gold
Belong to Shell resistance, source electrode connects the cathode of the high voltage power supply.
10. false action-proof high voltage relief circuit according to claim 1, which is characterized in that the second discharge switch pipe
Q2 is igbt transistor, and grid is connect with the midpoint of the 4th resistance R4 and 3rd resistor R3, collector connection
The metal shell resistance, emitter connect the cathode of the high voltage power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447210.5U CN208782478U (en) | 2018-09-05 | 2018-09-05 | Anti-misoperation high-voltage discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821447210.5U CN208782478U (en) | 2018-09-05 | 2018-09-05 | Anti-misoperation high-voltage discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208782478U true CN208782478U (en) | 2019-04-23 |
Family
ID=66159859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821447210.5U Active CN208782478U (en) | 2018-09-05 | 2018-09-05 | Anti-misoperation high-voltage discharge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208782478U (en) |
-
2018
- 2018-09-05 CN CN201821447210.5U patent/CN208782478U/en active Active
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