CN109130864A - Electric car low pressure power-down protection circuit - Google Patents
Electric car low pressure power-down protection circuit Download PDFInfo
- Publication number
- CN109130864A CN109130864A CN201810829673.6A CN201810829673A CN109130864A CN 109130864 A CN109130864 A CN 109130864A CN 201810829673 A CN201810829673 A CN 201810829673A CN 109130864 A CN109130864 A CN 109130864A
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- Prior art keywords
- circuit
- electric car
- low pressure
- voltage
- battery
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- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 102100036285 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Human genes 0.000 description 3
- 101000875403 Homo sapiens 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Proteins 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides a kind of electric car low pressure power-down protection circuits; it include: the first power circuit: including concatenated driving circuit and diode; first power circuit takes electricity from the battery of electric car; in the state that the output voltage of battery is more than or equal to predetermined value, required voltage is provided for the fault-resistant active shorting system of electric car；Second source circuit；Including concatenated low pressure power-fail detection circuit, direct-flow intermediate circuit and diode, the second source circuit takes electricity from the battery of electric car, in the state that the output voltage of battery is less than predetermined value, required voltage is provided for the fault-resistant active shorting system of electric car.The present invention may be implemented that output 15V direct current can be stablized when battery voltage is lower than 12V, and making fault-resistant, actively short-circuit (ASC) strategy is in running order, avoid magnetic pumping excessive pressure damages controller and motor.
Description
Technical field
The present invention relates to electronic circuit fields, and in particular, to a kind of electric car low pressure power-down protection circuit.
Background technique
Electric car mostly uses greatly the mode of storage battery power supply, since the inherent characteristic of battery determines that battery exists
It can be reduced using output voltage after a certain period of time.In electric car in permanent magnet synchronous motor (PMSM) operational process, due to
Under high revolving speed (RPM), magnetic pumping may cause over-voltage, will lead to inverter assembly and is destroyed.Therefore, using fault-resistant master
Dynamic short circuit (ASC) strategy, by tri- short circuits of IGBT, it is ensured that the safety of vehicle, controller and motor.But fault-resistant is actively short
The deployment of road (ASC) strategy depends on the supply voltage of 15V, once otherwise VDD starts the case where lower than critical voltage occur,
IGBT will be with linear mode, this may cause device compared with lossy and may finally lead to device failure because of overheat, so
Electric car low pressure power-down protection circuit is concerning important.
Currently, the method for maintaining electric car low-tension supply is mainly converted to friendship using by direct-flow intermediate circuit DC-link
Stream, then voltage is reduced by transformer, 15V low-voltage dc power supply is then converted to by rectifier.The cost of this method compared with
Height, and it is inefficient.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of electric car low pressure power-down protection circuits.
A kind of electric car low pressure power-down protection circuit provided according to the present invention, comprising:
First power circuit: including concatenated driving circuit and diode, first power circuit is from electric car
Battery take electricity, the output voltage of battery be more than or equal to predetermined value in the state of, be electric car fault-resistant actively
Shorting system provides required voltage；
Second source circuit；Including concatenated low pressure power-fail detection circuit, direct-flow intermediate circuit and diode, described
Two power circuits take electricity from the battery of electric car, are electronic in the state that the output voltage of battery is less than predetermined value
The fault-resistant active shorting system of automobile provides required voltage.
Preferably, the low pressure power-fail detection circuit exports low in the state that the output voltage of battery is less than predetermined value
Level exports high level in the state that the output voltage of battery is more than or equal to predetermined value.
Preferably, the direct-flow intermediate circuit does not export electricity when the output of the low pressure power-fail detection circuit is high level
Pressure, the output voltage when the output of the low pressure power-fail detection circuit is low level.
Preferably, the direct-flow intermediate circuit includes PNP triode, capacitor and zener diode, the low pressure power down
The output end of detection circuit connects the base stage of the PNP triode, the emitter ground connection of the PNP triode, the capacitor with
The zener diode is connected in parallel on the collector of the PNP triode.
Preferably, the direct-flow intermediate circuit further includes divider resistance, the divider resistance be connected to the capacitor and
The rear end of the zener diode.
Preferably, the voltage of the first power circuit output changes with input voltage and is changed；
The voltage of the second source circuit output is 15V.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The present invention can protect electric machine controller again when the battery output voltage of electric car may be implemented lower than 12V
Motor can be protected；When battery voltage is lower than 12V, output 15V direct current can be stablized, make fault-resistant actively short-circuit (ASC) plan
It is slightly in running order, avoid magnetic pumping excessive pressure damages controller and motor.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the principle of the present invention figure；
Fig. 2 is the circuit diagram of direct-flow intermediate circuit of the present invention；
Fig. 3 is the circuit structure diagram of present invention driver circuit.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the common skill of this field
For art personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to this
The protection scope of invention.
As shown in Figure 1, a kind of electric car low pressure power-down protection circuit provided by the invention, including two power circuits:
First power circuit generates VDD1, and second source circuit generates VDD2.
First power circuit: including concatenated driving circuit and diode, storage of first power circuit from electric car
Battery electricity-taking, in the state that the output voltage of battery is more than or equal to predetermined value (12V), to the fault-resistant master of electric car
Dynamic shorting system output VDD1 (input voltage=output voltage).
Second source circuit；Including concatenated low pressure power-fail detection circuit, direct-flow intermediate circuit and diode, the second electricity
Source circuit takes electricity from the battery of electric car, in the state that the output voltage of battery is less than predetermined value (12V), to electricity
The fault-resistant active shorting system of electrical automobile exports VDD2 (15V).
In this way, driving circuit works in the state that battery is more than or equal to 12V, provide (defeated with the voltage of input variation
Enter voltage=output voltage), and stable 15V voltage is being provided by second source when being less than 12V, keep fault-resistant actively short
Road (ASC) strategy is in running order, avoids magnetic pumping excessive pressure damages controller and motor.
The voltage shape that low pressure power-fail detection circuit exports in the state that the output voltage of battery is less than predetermined value (12V)
State signal (Sign) is vacation, i.e. low level, is exported in the state that the output voltage of battery is more than or equal to predetermined value (12V)
Voltage state signal (Sign) be true, i.e. high level.
The circuit diagram of direct-flow intermediate circuit as shown in Fig. 2, direct-flow intermediate circuit include PNP triode Q1, it is capacitor C1, steady
Press diode Z1 and divider resistance R1, R2, R3, the base of the output end connection PNP triode Q1 of low pressure power-fail detection circuit
Pole, the emitter ground connection of PNP triode Q1, capacitor C1 and zener diode Z1 are connected in parallel on the collector of PNP triode Q1, point
Piezoresistance R1, R2, R3 are connected to the rear end of capacitor C1 and zener diode Z1.
When Sign is vacation, i.e. low level, PNP triode Q1 conducting passes through the zener diode Z1 and capacitor of 15V
The VDD2 of C1 generation 15V.
The circuit structure of driving circuit as shown in figure 3, the circuit is the driving circuit of the first power supply, main function be by
Input voltage becomes to be battery input electricity with voltage (input voltage=output voltage) .KL_30_IN+12V of input variation
Pressure, KL_15_IN+12V are that automobile key controls signal, and KL_30_+12V is the signal (VDD1) after conversion.Work as KL_15_IN+
12V is enabled, and KL_30_+12V output voltage changes with input voltage KL_30_IN+12V and changes (input voltage=output electricity
Pressure).
Driving circuit works in the state that battery is more than or equal to 12V, provides voltage (the input electricity with input variation
Pressure=output voltage), and stable 15V voltage is being provided by second source when being less than 12V.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (7)
1. a kind of electric car low pressure power-down protection circuit characterized by comprising
First power circuit: including concatenated driving circuit and diode, storage of first power circuit from electric car
Battery electricity-taking is the fault-resistant actively short circuit of electric car in the state that the output voltage of battery is more than or equal to predetermined value
System provides required voltage；
Second source circuit；Including concatenated low pressure power-fail detection circuit, direct-flow intermediate circuit and diode, second electricity
Source circuit takes electricity from the battery of electric car, is electric car in the state that the output voltage of battery is less than predetermined value
Fault-resistant active shorting system provide needed for voltage.
2. electric car low pressure power-down protection circuit according to claim 1, which is characterized in that the low pressure detection of power loss
Circuit exports low level in the state that the output voltage of battery is less than predetermined value, is more than or equal in the output voltage of battery
High level is exported in the state of predetermined value.
3. electric car low pressure power-down protection circuit according to claim 1, which is characterized in that the direct-flow intermediate circuit
The not output voltage when the output of the low pressure power-fail detection circuit is high level, in the output of the low pressure power-fail detection circuit
Output voltage when for low level.
4. electric car low pressure power-down protection circuit according to claim 1, which is characterized in that the direct-flow intermediate circuit
Including PNP triode, capacitor and zener diode, the output end of the low pressure power-fail detection circuit connects tri- pole PNP
The base stage of pipe, the emitter ground connection of the PNP triode, the capacitor and the zener diode are connected in parallel on tri- pole PNP
The collector of pipe.
5. electric car low pressure power-down protection circuit according to claim 4, which is characterized in that the direct-flow intermediate circuit
It further include divider resistance, the divider resistance is connected to the rear end of the capacitor and the zener diode.
6. electric car low pressure power-down protection circuit according to claim 1, which is characterized in that first power circuit
Voltage with the second source circuit output is all 15V.
7. electric car low pressure power-down protection circuit according to claim 1, which is characterized in that first power circuit
The voltage of output changes with input voltage and is changed；
The voltage of the second source circuit output is 15V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829673.6A CN109130864A (en) | 2018-07-25 | 2018-07-25 | Electric car low pressure power-down protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829673.6A CN109130864A (en) | 2018-07-25 | 2018-07-25 | Electric car low pressure power-down protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109130864A true CN109130864A (en) | 2019-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810829673.6A Pending CN109130864A (en) | 2018-07-25 | 2018-07-25 | Electric car low pressure power-down protection circuit |
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| CN (1) | CN109130864A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787349A (en) * | 2019-03-01 | 2019-05-21 | 普联技术有限公司 | A kind of UPS circuit, power circuit and electronic equipment |
| CN109878438A (en) * | 2019-02-22 | 2019-06-14 | 湖南海博瑞德电智控制技术有限公司 | Power-supply system for new-energy automobile |
| CN111722001A (en) * | 2019-03-18 | 2020-09-29 | 厦门雅迅网络股份有限公司 | Vehicle-mounted terminal power failure detection circuit and method |
| EP4075652A1 (en) * | 2021-04-14 | 2022-10-19 | Hitachi Energy Switzerland AG | Inverter circuit for an electrical ac motor, electrical drive and method for controlling an electrical drive |
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| CN102122881A (en) * | 2011-02-21 | 2011-07-13 | 北京科诺伟业科技有限公司 | High-power IGBT drive protection circuit applied to wind power generation |
| CN103311895A (en) * | 2013-05-28 | 2013-09-18 | 南车株洲电力机车研究所有限公司 | Under-voltage protection device and system of converter control system |
| CN105281296A (en) * | 2015-11-18 | 2016-01-27 | 广州金升阳科技有限公司 | Switch power supply protection and control method and circuit |
| CN107834834A (en) * | 2017-11-06 | 2018-03-23 | 湖北三江航天万峰科技发展有限公司 | A kind of power tube drive device with power-down protection |
-
2018
- 2018-07-25 CN CN201810829673.6A patent/CN109130864A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122881A (en) * | 2011-02-21 | 2011-07-13 | 北京科诺伟业科技有限公司 | High-power IGBT drive protection circuit applied to wind power generation |
| CN103311895A (en) * | 2013-05-28 | 2013-09-18 | 南车株洲电力机车研究所有限公司 | Under-voltage protection device and system of converter control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109878438A (en) * | 2019-02-22 | 2019-06-14 | 湖南海博瑞德电智控制技术有限公司 | Power-supply system for new-energy automobile |
| CN109878438B (en) * | 2019-02-22 | 2021-09-14 | 湖南海博瑞德电智控制技术有限公司 | Power supply system for new energy automobile |
| CN109787349A (en) * | 2019-03-01 | 2019-05-21 | 普联技术有限公司 | A kind of UPS circuit, power circuit and electronic equipment |
| CN111722001A (en) * | 2019-03-18 | 2020-09-29 | 厦门雅迅网络股份有限公司 | Vehicle-mounted terminal power failure detection circuit and method |
| CN111722001B (en) * | 2019-03-18 | 2023-10-24 | 厦门雅迅网络股份有限公司 | Circuit and method for detecting power failure of vehicle-mounted terminal |
| EP4075652A1 (en) * | 2021-04-14 | 2022-10-19 | Hitachi Energy Switzerland AG | Inverter circuit for an electrical ac motor, electrical drive and method for controlling an electrical drive |
| WO2022218627A1 (en) * | 2021-04-14 | 2022-10-20 | Hitachi Energy Switzerland Ag | Inverter circuit for an electrical ac motor, electrical drive and method for controlling an electrical drive |
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Effective date of abandoning: 20240621 |
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