CN206349785U - A kind of active leadage circuit of invariable power - Google Patents
A kind of active leadage circuit of invariable power Download PDFInfo
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- CN206349785U CN206349785U CN201621438641.6U CN201621438641U CN206349785U CN 206349785 U CN206349785 U CN 206349785U CN 201621438641 U CN201621438641 U CN 201621438641U CN 206349785 U CN206349785 U CN 206349785U
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Abstract
The deficiencies in the prior art are solved the utility model discloses a kind of active leadage circuit of invariable power, technical scheme is：Including charging bus, driving chip, control chip, input voltage detection circuit and output voltage detecting circuit, the output end of charging bus is connected with input voltage detection circuit, the output end of charging bus is also connected with the drain electrode of FET, driving chip connects FET and control chip simultaneously, control chip is also connected with input voltage detection circuit and output voltage detecting circuit simultaneously, driving chip and control chip are powered by accessory power supply, the source electrode of FET is connected with one end of LC filter circuits, the grid of FET is also connected with driving chip, one end of the other end bleeder resistance of LC filter circuits is connected, the other end ground connection of bleeder resistance, the other end of LC filter circuits is also connected with output voltage detecting circuit.
Description
Technical field
The utility model is related to charging electric vehicle technical field, refers in particular to a kind of active leadage circuit of invariable power.
Background technology
With continuing to develop for new-energy automobile, charging equipment of electric automobile is also continuously increased.In order in charging process
Ensure personal safety, charging equipment output voltage when stopping charging needing to drop to below 60V safety electricity in 1 second
Pressure.Current method is off connecting a bleeder resistance in output end during charging, and output voltage is declined by conductive discharge.
But conductive discharge speed is first quick and back slow, to be a RC discharge curve, below 60V is dropped in 1 second in order to reach, resistance is opened
Begin electric discharge power it is very big, the resistance volume of selection is also very big, and the power in later stage of discharging but it is very small, cause design
Waste.By taking 500V charging piles as an example, conductive discharge power at initial stage is 69 times of electric discharge latter stage.
China Patent Publication No. CN 205195387U, publication date on April 27th, 2016, it is entitled " a kind of charging pile and its
A kind of charging pile and its power down storage circuit are disclosed in the utility model patent of power down storage circuit ", the inspection of its MCU connections power supply
Module is surveyed, MCU power end is connected with Voltage stabilizing module (LDO), and the input of the Voltage stabilizing module is connected with a free-wheeling diode
(C1), the free-wheeling diode two ends, which are parallel with a leadage circuit, the leadage circuit, is provided with electronic switch, the MCU controls
System connects the electronic switch；In free-wheeling diode C1 two ends leadage circuit in parallel, after power down, which is stored, to be completed, leadage circuit
Start, be zero rapid release of the electricity in C1；While the requirement of power down storage time is ensured, it can guarantee that back-up source is quick again
Release, it is ensured that MCU rapidly enters safe condition.It is disadvantageous in that, the utility model patent does not still solve bleeder resistance
The problem of volume is larger.
Utility model content
The purpose of this utility model is to overcome the bleeder resistance volume of charging equipment of electric automobile in the prior art larger, is put
There is provided a kind of active leadage circuit of invariable power for the relatively low shortcoming of latter stage discharging efficiency when electric.
The purpose of this utility model is achieved by following technical proposals：
A kind of active leadage circuit of invariable power, including charging bus, driving chip, control chip, input voltage measurement electricity
Road and output voltage detecting circuit, the output end of charging bus are connected with input voltage detection circuit, the output for the bus that charges
End is also connected with the drain electrode of FET, and driving chip connects FET and control chip simultaneously, and control chip is also simultaneously
It is connected with input voltage detection circuit and output voltage detecting circuit, driving chip and control chip are powered by accessory power supply,
The source electrode of FET is connected with one end of LC filter circuits, and the grid of FET is also connected with driving chip, LC filters
One end of the other end bleeder resistance of wave circuit is connected, the other end ground connection of bleeder resistance, and the other end of LC filter circuits is also
It is connected with output voltage detecting circuit.
The operation principle of this circuit is that control chip produces pwm signal and worked by driving chip driving FET,
LC filter circuits make output voltage be galvanic current pressure, and accessory power supply is that driving chip and control chip provide work electricity
Source, control chip gathers input voltage and output voltage by input voltage detection circuit and output voltage detecting circuit, and leads to
Calculating regulation pwm signal is crossed, makes output voltage stabilization, bleeder resistance adds on the output voltage, output voltage is one stable
Safe voltage less than 60V, stable output voltage, which is added in, produces constant discharge power on bleeder resistance, can by the circuit
To greatly reduce the power and volume of bleeder resistance, it can further reduce the volume of charging pile.
As a kind of preferred scheme, the active leadage circuit of invariable power also includes communicating circuit, and communicating circuit is by accessory power supply
Power supply, communicating circuit is also connected with control chip.Accessory power supply provides working power for communicating circuit, and control chip passes through logical
It can be able to be CAN, 485 and 232 etc., charging pile main control with charging pile master controller real-time Communication for Power, communication modes to interrogate circuit
Device can by the circuit measuring charge bus voltage.
As a kind of preferred scheme, LC filter circuits also include diode, the negative electrode of diode and the source electrode of FET
It is connected, the plus earth of diode.Diode scene effect pipe is inductance afterflow during turning off.
The beneficial effects of the utility model are：The power and volume of bleeder resistance can be greatly reduced by the circuit.Together
When control chip can be with charging pile master controller real-time Communication for Power by communicating circuit.The utility model is simple in construction, practicality
By force.The utility model is simple in construction, practical.
Brief description of the drawings
Fig. 1 is a kind of circuit diagram of the present utility model；
Wherein：1st, charging bus 2, FET 3, diode 4, inductance 5, electric capacity 6, bleeder resistance 7, driving core
Piece 8, accessory power supply 9, input voltage detection circuit 10, control chip 11, communicating circuit 12, output voltage detecting circuit.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.
Embodiment：A kind of active leadage circuit of invariable power, as shown in figure 1, including charging bus 1, driving chip 7, control
Chip 10, communicating circuit 11, input voltage detection circuit 9 and output voltage detecting circuit 12, charge bus output end with it is defeated
Enter voltage detecting circuit to be connected, drain electrode of the output end also with FET 2 for the bus that charges is connected, and driving chip connects simultaneously
FET and control chip are connect, control chip is also connected with input voltage detection circuit and output voltage detecting circuit simultaneously
Connect, driving chip, control chip and communicating circuit are powered by accessory power supply 8, the source electrode of FET and the one of LC filter circuits
End is connected, and the grid of FET is also connected with driving chip, one end phase of the other end bleeder resistance 6 of LC filter circuits
Connection, the other end ground connection of bleeder resistance, the other end of LC filter circuits is also connected with output voltage detecting circuit.LC is filtered
Circuit also includes inductance 4, electric capacity 5 and diode 3, and the negative electrode of diode is connected with the source electrode of FET, the sun of diode
Pole is grounded.
Control chip produces pwm signal and worked by driving chip driving FET, and LC filter circuits make output voltage
For galvanic current pressure, accessory power supply is that driving chip and control chip provide working power, and control chip is by inputting electricity
Pressure detection circuit and output voltage detecting circuit collection input voltage and output voltage, and by calculating regulation pwm signal, make defeated
Go out voltage stabilization, bleeder resistance adds on the output voltage, output voltage is a stable safe voltage less than 60V, it is stable
Output voltage be added in constant discharge power produced on bleeder resistance, the work(of bleeder resistance can be greatly reduced by the circuit
Rate and volume, can further reduce the volume of charging pile.Control chip can be real with charging pile master controller by communicating circuit
Shi Tongxin, communication modes can be CAN, 485 and 232 etc., and charging pile master controller can pass through circuit measuring charging bus
Voltage.
Claims (3)
1. a kind of active leadage circuit of invariable power, it is characterized in that, including charging bus, driving chip, control chip, input voltage
Circuit and output voltage detecting circuit are detected, the output end of charging bus is connected with input voltage detection circuit, and charge bus
Output end be also connected with the drain electrode of FET, driving chip connects FET and control chip, control chip simultaneously
Also it is connected simultaneously with input voltage detection circuit and output voltage detecting circuit, driving chip and control chip are by accessory power supply
Power supply, the source electrode of FET is connected with one end of LC filter circuits, and the grid of FET is also connected with driving chip,
One end of the other end bleeder resistance of LC filter circuits is connected, the other end of bleeder resistance ground connection, LC filter circuits it is another
End is also connected with output voltage detecting circuit.
2. the active leadage circuit of a kind of invariable power according to claim 1, it is characterized in that, in addition to communicating circuit, communication
Circuit is powered by accessory power supply, and communicating circuit is also connected with control chip.
3. the active leadage circuit of a kind of invariable power according to claim 1 or 2, it is characterized in that, described LC filter circuits
Also include diode, the negative electrode of diode is connected with the source electrode of FET, the plus earth of diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621438641.6U CN206349785U (en) | 2016-12-26 | 2016-12-26 | A kind of active leadage circuit of invariable power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621438641.6U CN206349785U (en) | 2016-12-26 | 2016-12-26 | A kind of active leadage circuit of invariable power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206349785U true CN206349785U (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621438641.6U Active CN206349785U (en) | 2016-12-26 | 2016-12-26 | A kind of active leadage circuit of invariable power |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394297A (en) * | 2018-03-07 | 2018-08-14 | 深圳新恒业电气有限公司 | The protection of direct-current charging post residual voltage bleeder resistance and control method |
| CN110535335A (en) * | 2018-05-25 | 2019-12-03 | 株洲中车时代电气股份有限公司 | It is a kind of for controlling the method and system of switching device in energy leadage circuit |
| CN110854834A (en) * | 2019-11-22 | 2020-02-28 | 南京派格测控科技有限公司 | Method for improving voltage reduction speed of power supply and bleeder circuit |
| CN112527044A (en) * | 2020-12-02 | 2021-03-19 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN113765182A (en) * | 2021-08-31 | 2021-12-07 | 长春捷翼汽车零部件有限公司 | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle |
-
2016
- 2016-12-26 CN CN201621438641.6U patent/CN206349785U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394297A (en) * | 2018-03-07 | 2018-08-14 | 深圳新恒业电气有限公司 | The protection of direct-current charging post residual voltage bleeder resistance and control method |
| CN108394297B (en) * | 2018-03-07 | 2021-08-24 | 深圳市品一电气有限公司 | Protection and control method for residual voltage discharge resistor of direct current charging pile |
| CN110535335A (en) * | 2018-05-25 | 2019-12-03 | 株洲中车时代电气股份有限公司 | It is a kind of for controlling the method and system of switching device in energy leadage circuit |
| CN110535335B (en) * | 2018-05-25 | 2020-12-08 | 株洲中车时代电气股份有限公司 | Method and system for controlling switching device in energy discharge circuit |
| CN110854834A (en) * | 2019-11-22 | 2020-02-28 | 南京派格测控科技有限公司 | Method for improving voltage reduction speed of power supply and bleeder circuit |
| CN112527044A (en) * | 2020-12-02 | 2021-03-19 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN112527044B (en) * | 2020-12-02 | 2022-04-15 | 上海维安半导体有限公司 | Transient response enhancement circuit of no-capacitor LDO |
| CN113765182A (en) * | 2021-08-31 | 2021-12-07 | 长春捷翼汽车零部件有限公司 | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle |
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