CN203720237U - Voltage detection system for motor controller used by electric automobile - Google Patents
Voltage detection system for motor controller used by electric automobile Download PDFInfo
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- CN203720237U CN203720237U CN201320890041.3U CN201320890041U CN203720237U CN 203720237 U CN203720237 U CN 203720237U CN 201320890041 U CN201320890041 U CN 201320890041U CN 203720237 U CN203720237 U CN 203720237U
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- voltage detecting
- branch road
- voltage detection
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Abstract
The utility model discloses a voltage detection system for a motor controller used by an electric automobile. The voltage detection system comprises a voltage detection circuit which is used for detecting bus voltage of the motor controller; and a self-detection circuit which is electrically connected with the voltage detection circuit and used for detecting the voltage detection circuit. According to the voltage detection system for the motor controller used by the electric automobile, redundancy design of the voltage detection circuit is utilized to realize a self-detection function of the voltage detection circuit so that occurrence of a problem in the voltage detection circuit can be detected, input of the voltage detection circuit is more reliable, diagnosis and processing of an overvoltage protection fault are facilitated, and thus an objective of protecting a power device is achieved.
Description
Technical field
The utility model relates to the voltage detecting technical field of electric machine controller for motor vehicle, relates in particular to a kind of voltage detecting system of electric machine controller for motor vehicle.
Background technology
Pure electric sedan is when operation, if now main relay disconnects suddenly for a certain reason, and now electric machine controller is also being worked, especially when in generating state, because extraneous power supply interrupts suddenly, motor is due to self-induction action, can produce very high peak voltage, and the time is quite short, 10ms may just can rise to 1000V, if now can not close in time IGBT, this voltage may will directly cause the damage of IGBT.
Existing voltage detecting circuit, the function with voltage sample, but do not there is the function of itself being carried out to self check, when voltage detecting circuit itself goes wrong, cause detecting voltage when inaccurate, thereby likely cause electric machine controller to turn-off IGBT by mistake, motor just can not worked like this, causing in travelling and occur power interruption, is breakneck thing.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, and a kind of voltage detecting system of electric machine controller for motor vehicle is provided.
For achieving the above object, the technical solution of the utility model is:
A voltage detecting system for electric machine controller for motor vehicle, comprising:
Voltage detecting circuit for detection of the busbar voltage of described electric machine controller; And
Be electrically connected to described voltage detecting circuit, and the self-checking circuit for described voltage detecting circuit is detected.
Preferably, described voltage detecting circuit comprises:
The first branch road, described the first branch road comprises the first bleeder circuit in sequential series, the first voltage clamp circuit and the first filtering circuit, the input end of described the first bleeder circuit connects the first lead-in wire of described bus;
The second branch road, described the second branch road comprises the second bleeder circuit in sequential series and second voltage clamping circuit, the input end of described the second bleeder circuit connects the second lead-in wire of described bus;
Differential amplifier, the output terminal of described the first filtering circuit connects the first input end of described differential amplifier, the output terminal of described second voltage clamping circuit connects the second input end of described differential amplifier, the output signal that the output signal of described differential amplifier is described voltage detecting circuit.
Preferably, described self-checking circuit comprises:
The 3rd branch road, described the 3rd branch road comprises the second filtering circuit and tertiary voltage clamping circuit, the output signal of described voltage detecting circuit is sequentially passed through described the second filtering circuit and tertiary voltage clamping circuit, obtains the first redundancy voltage;
The 4th branch road, described the 4th branch road comprises the 3rd filtering circuit and the 4th voltage clamp circuit, the output signal of described voltage detecting circuit is sequentially passed through described the 3rd filtering circuit and the 4th voltage clamp circuit, obtains the second redundancy voltage;
Control module, for judging whether the absolute value of the difference of described the first redundancy voltage and the second redundancy voltage is less than the self check threshold value of setting; If so, determine that described voltage detecting circuit is normal, if not, determine that described voltage detecting circuit is abnormal.
Preferably, described control module is a kind of in CPU, single-chip microcomputer, flush bonding processor.
Preferably, described self check threshold value is 0.3V.
The beneficial effects of the utility model are; the voltage detecting system of electric machine controller for motor vehicle described in the utility model; utilize the Redundancy Design of voltage detecting circuit; reach the self check effect to voltage detecting circuit; whether can detect voltage detecting circuit goes wrong; make the input of voltage detecting circuit more reliable, be convenient to diagnosis and the processing of overvoltage protection fault, reach the object of protection power device.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the voltage detecting system of the utility model embodiment electric machine controller for motor vehicle;
Fig. 2 shows the electrical block diagram of voltage detecting circuit in the utility model embodiment;
Fig. 3 shows the electrical block diagram of self-checking circuit in the utility model embodiment.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
As shown in Figure 1, be the structural representation of the voltage detecting system of the utility model embodiment electric machine controller for motor vehicle, described voltage detecting system comprises voltage detecting circuit 101 and the self-checking circuit 102 being electrically connected to described voltage detecting circuit 101.Described voltage detecting circuit 101 is for detection of the voltage detecting circuit 101 of the busbar voltage of described electric machine controller; The self-checking circuit 102 of described self-checking circuit 102 for described voltage detecting circuit 101 is detected.
As shown in Figure 2, be the electrical block diagram of voltage detecting circuit 101 in the utility model embodiment.Described voltage detecting circuit 101 comprises the first branch road, the second branch road and differential amplifier 1016.
Particularly, described the first branch road comprises the first bleeder circuit 1011, the first voltage clamp circuit 1012 and the first filtering circuit 1013 in sequential series, and the input end of described the first bleeder circuit 1011 connects first lead-in wire (input end of the first lead-in wire is WTC) of described bus.Here, described the first bleeder circuit 1011 comprises 6 divider resistance R501, R502, R503, R504, R505, R506 in sequential series; The first voltage clamp circuit 1012 is two-diode clamp circuit, and the first filtering circuit 1013 is a capacitor filter; And the free end of divider resistance R506 connects the first lead-in wire of the bus of electric machine controller as the input end of the first bleeder circuit 1011.
Described the second branch road comprises the second bleeder circuit 1014 and second voltage clamping circuit 1015 in sequential series, and the input end of described the second bleeder circuit 1014 connects second lead-in wire (input signal of the second lead-in wire is expressed as WBE) of described bus.Described the second bleeder circuit 1014 comprises 6 divider resistance R509, R510, R511, R512, R513, R514 in sequential series; Second voltage clamping circuit 1015 is two-diode clamp circuit; And the free end of described divider resistance R514 connects the second lead-in wire of the bus of electric machine controller as the input end of the second bleeder circuit 1014.
The output terminal of described the first filtering circuit 1013 connects the first input end of described differential amplifier 1016, the output terminal of described second voltage clamping circuit 1015 connects the second input end of described differential amplifier 1016, and the output signal of described differential amplifier 1016 is the output signal U DC of described voltage detecting circuit 101.
As shown in Figure 3, be the electrical block diagram of self-checking circuit 102 in the utility model embodiment, described self-checking circuit 102 comprises the 3rd branch road, the 4th branch road and control module 1025.
Particularly, described the 3rd branch road comprises the second filtering circuit 1021 and tertiary voltage clamping circuit 1022, the output signal U DC of described voltage detecting circuit 101 sequentially passes through described the second filtering circuit 1021 and tertiary voltage clamping circuit 1022, obtains the first redundancy voltage DSP1.Here, described the second filtering circuit 1021 is a RC filtering circuit, and tertiary voltage clamping circuit 1022 is two-diode clamp circuit.
Described the 4th branch road comprises the 3rd filtering circuit 1023 and the 4th voltage clamp circuit 1024, the output signal U DC of described voltage detecting circuit 101 sequentially passes through described the 3rd filtering circuit 1023 and the 4th voltage clamp circuit 1024, obtains the second redundancy voltage DSP2.Here, described the 3rd filtering circuit 1023 is a RC filtering circuit, and the 4th voltage clamp circuit 1024 is two-diode clamp circuit.
Described control module 1025 is preferably a kind of in central processing unit (CPU), single-chip microcomputer, flush bonding processor.Described the first redundancy voltage DSP1 and the second redundancy voltage DSP2 input to respectively the input end of control module 1025, and described control module 1025 is for judging whether the absolute value of the difference of described the first redundancy voltage DSP1 and the second redundancy voltage DSP2 is less than the self check threshold value of setting; If so, determine that described voltage detecting circuit 101 is normal, if not, determine that described voltage detecting circuit 101 is abnormal.Especially, described self check threshold value is preferably 0.3V.In addition, what deserves to be explained is, above-mentioned in the inner judgement comparison program of carrying out of control module 1025, be the usual program design adopting of those skilled in the art.
The voltage detecting system of electric machine controller for motor vehicle described in the utility model; utilize the Redundancy Design of voltage detecting circuit 101; reach the self check effect to voltage detecting circuit 101; whether can detect voltage detecting circuit 101 goes wrong; make the input of voltage detecting circuit 101 more reliable; be convenient to diagnosis and the processing of overvoltage protection fault, reach the object of protection power device.
Embodiment shown in above foundation is graphic describes structure of the present utility model, feature and action effect in detail; the foregoing is only preferred embodiment of the present utility model; but the utility model does not limit practical range with shown in drawing; every change of doing according to conception of the present utility model; or be revised as the equivalent embodiment of equivalent variations; when not exceeding yet instructions and illustrating contain spiritual, all should be in protection domain of the present utility model.
Claims (4)
1. a voltage detecting system for electric machine controller for motor vehicle, is characterized in that, comprising:
Voltage detecting circuit for detection of the busbar voltage of described electric machine controller; And
Be electrically connected to described voltage detecting circuit, and the self-checking circuit for described voltage detecting circuit is detected;
Described voltage detecting circuit comprises:
The first branch road, described the first branch road comprises the first bleeder circuit in sequential series, the first voltage clamp circuit and the first filtering circuit, the input end of described the first bleeder circuit connects the first lead-in wire of described bus;
The second branch road, described the second branch road comprises the second bleeder circuit in sequential series and second voltage clamping circuit, the input end of described the second bleeder circuit connects the second lead-in wire of described bus;
Differential amplifier, the output terminal of described the first filtering circuit connects the first input end of described differential amplifier, the output terminal of described second voltage clamping circuit connects the second input end of described differential amplifier, the output signal that the output signal of described differential amplifier is described voltage detecting circuit.
2. voltage detecting system according to claim 1, is characterized in that, described self-checking circuit comprises:
The 3rd branch road, described the 3rd branch road comprises the second filtering circuit and tertiary voltage clamping circuit, the output signal of described voltage detecting circuit is sequentially passed through described the second filtering circuit and tertiary voltage clamping circuit, obtains the first redundancy voltage;
The 4th branch road, described the 4th branch road comprises the 3rd filtering circuit and the 4th voltage clamp circuit, the output signal of described voltage detecting circuit is sequentially passed through described the 3rd filtering circuit and the 4th voltage clamp circuit, obtains the second redundancy voltage;
Control module, for judging whether the absolute value of the difference of described the first redundancy voltage and the second redundancy voltage is less than the self check threshold value of setting; If so, determine that described voltage detecting circuit is normal, if not, determine that described voltage detecting circuit is abnormal.
3. voltage detecting system according to claim 2, is characterized in that, described control module is a kind of in CPU, single-chip microcomputer, flush bonding processor.
4. voltage detecting system according to claim 2, is characterized in that, described self check threshold value is 0.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890041.3U CN203720237U (en) | 2013-12-30 | 2013-12-30 | Voltage detection system for motor controller used by electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890041.3U CN203720237U (en) | 2013-12-30 | 2013-12-30 | Voltage detection system for motor controller used by electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720237U true CN203720237U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320890041.3U Expired - Fee Related CN203720237U (en) | 2013-12-30 | 2013-12-30 | Voltage detection system for motor controller used by electric automobile |
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| Country | Link |
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| CN (1) | CN203720237U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678311A (en) * | 2015-01-29 | 2015-06-03 | 北京新能源汽车股份有限公司 | Detection device for power voltage state of electric automobile |
| CN105717342A (en) * | 2016-03-18 | 2016-06-29 | 浙江中控技术股份有限公司 | Analog quantity current input collecting system |
| CN112428822A (en) * | 2019-08-07 | 2021-03-02 | 北京新能源汽车股份有限公司 | Diagnosis control method and device and electric automobile |
-
2013
- 2013-12-30 CN CN201320890041.3U patent/CN203720237U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678311A (en) * | 2015-01-29 | 2015-06-03 | 北京新能源汽车股份有限公司 | Detection device for power voltage state of electric automobile |
| CN104678311B (en) * | 2015-01-29 | 2017-10-20 | 北京新能源汽车股份有限公司 | The detection means of the power voltage status of electric automobile |
| CN105717342A (en) * | 2016-03-18 | 2016-06-29 | 浙江中控技术股份有限公司 | Analog quantity current input collecting system |
| CN105717342B (en) * | 2016-03-18 | 2018-10-16 | 浙江中控技术股份有限公司 | A kind of analog quantity electric current input acquisition system |
| CN112428822A (en) * | 2019-08-07 | 2021-03-02 | 北京新能源汽车股份有限公司 | Diagnosis control method and device and electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20161230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |