CN207218219U - A kind of short circuit over-current protection circuit for controller for electric vehicle - Google Patents
A kind of short circuit over-current protection circuit for controller for electric vehicle Download PDFInfo
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- CN207218219U CN207218219U CN201721090818.2U CN201721090818U CN207218219U CN 207218219 U CN207218219 U CN 207218219U CN 201721090818 U CN201721090818 U CN 201721090818U CN 207218219 U CN207218219 U CN 207218219U
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Abstract
It the utility model is related to a kind of short circuit over-current protection circuit for controller for electric vehicle, including power supply（4）, Hall element（3）, magnetic guiding loop（1）, first resistor（5）, second resistance（6）, 3rd resistor（7）, the 4th resistance（8）, the 5th resistance（9）, first comparator（10）With the second comparator（11）, utilize Hall element（3）Current value is measured, by Hall element（3）Current detection value be output to first comparator（10）Input and the second comparator（11）Input, when the magnitude of voltage of current detecting is more than high voltage limit value（12）Or less than lower bound magnitude of voltage（13）When, the output end of the protection circuit exports 0 level will close circuit output to control terminal, control terminal, that is, realize excessively stream short-circuit protection；When the magnitude of voltage of current detecting is more than lower bound magnitude of voltage（13）And it is less than high voltage limit duration（12）, the output end out-put supply of the protection circuit（4）Magnitude of voltage control terminal normal operation, is not dealt with, circuit is simple, and reliability is high, is not in the phenomenon protected or do not protected by mistake to control terminal.
Description
Technical field
The utility model belongs to a kind of short circuit over-current protection circuit, more particularly to a kind of excessively stream for controller for electric vehicle
Short-circuit protection circuit.
Background technology
In the prior art, controller for electric vehicle uses three phase full bridge circuit, and conventional short circuit over-current protection circuit is profit
Detected with application-specific integrated circuit and metal-oxide-semiconductor conducting voltage and short-circuit protection is realized by special circuit, because metal-oxide-semiconductor conducting resistance arrives at 0 degree
Resistance has nearly change more than 1 times during 150 degree of temperature changes, easily causes and protects by mistake or do not protect phenomenon.
Utility model content
Technical problem to be solved in the utility model is：One effective short circuit over-current protection circuit is provided, occurred without
Miss and protect or do not protect phenomenon.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：One kind is used for controller for electric vehicle
Short circuit over-current protection circuit, it is characterised in that including power supply, Hall element, magnetic guiding loop, first resistor, second resistance, the 3rd
Resistance, the 4th resistance, the 5th resistance, first comparator and the second comparator, the magnetic guiding loop are coated on to be checked in a non-contact manner
Around a part for the Ampereconductors of survey, the magnetic guiding loop is jagged, and the Hall element is arranged on lacking for the magnetic guiding loop
Mouthful place, the output end of the Hall element and meanwhile connect the first comparator negative input and second comparator just
The output end of pole input, the output end of the first comparator and second comparator is defeated with the protection circuit respectively
Go out end to be connected, the output end of the first comparator is connected with the output end of second comparator, the first comparator
Electrode input end connects one end of the first resistor, and the other end of the first resistor is connected with one end of the 5th resistance,
The other end of the first resistor is connected with described one end of the 5th resistance with power supply, and the 5th resistance is in addition
The output end of the one termination first comparator, one end of the second resistance are connected with described one end of the first resistor,
The other end ground connection of the second resistance, the negative input of second comparator connect one end of the 3rd resistor and described
One end of 4th resistance, the other end of the 3rd resistor connect power supply, the other end ground connection of the 4th resistance.
Further, the Hall element is located in the magnetic circuit of the magnetic guiding loop.
Further, described magnetic guiding loop section has the shape of 2/3rds circular arcs.
Wherein, the electrode input end value of the first comparator is high voltage limit value, the negative input of the second comparator
It is worth for lower bound magnitude of voltage.
The beneficial effects of the utility model are：Current value is measured using Hall element, by the current detecting of Hall element
Value is output to the input of first comparator and the second comparator, when the magnitude of voltage of current detecting is more than high voltage limit value or low
When lower bound magnitude of voltage, the output end of the protection circuit exports 0 level will close circuit output to control terminal, control terminal, i.e.,
Realize excessively stream short-circuit protection；When the magnitude of voltage of current detecting is more than lower bound magnitude of voltage and is less than high voltage limit value, the protection
The output end output supply voltage value of circuit control terminal normal operation, is not dealt with to control terminal, and circuit is simple, and reliability is high,
It is not in the phenomenon protected or do not protected by mistake.
Brief description of the drawings
Fig. 1 is the fundamental diagram according to embodiment of the present utility model.
Label declaration：
1st, magnetic guiding loop；2nd, Ampereconductors；3rd, Hall element；4th, power supply；5th, first resistor；6th, second resistance；7th,
Three resistance；8th, the 4th resistance；9th, the 5th resistance；
10th, first comparator；11st, the second comparator；12nd, high voltage limit value；
13rd, lower bound magnitude of voltage；14th, the output end of the protection circuit.
Embodiment
For detailed description technology contents of the present utility model, the objects and the effects, below in conjunction with embodiment and match somebody with somebody
Accompanying drawing is closed to be explained.
It refer to shown in Fig. 1, a kind of short circuit over-current protection circuit for controller for electric vehicle, it is characterised in that including
Power supply 4, Hall element 3, magnetic guiding loop 1, first resistor 5, second resistance 6,3rd resistor 7, the 4th resistance 8, the 5th resistance 9,
One comparator 10 and the second comparator 11, the magnetic guiding loop 1 are coated on a part for Ampereconductors to be detected in a non-contact manner
Around, the magnetic guiding loop 1 is jagged, and the Hall element 3 is arranged on the indentation, there of the magnetic guiding loop 1, the Hall element 3
Output end simultaneously connect the negative input of the first comparator 10 and the electrode input end of second comparator 11, it is described
The output end of first comparator 10 and the output end of second comparator 11 phase of output end 14 with the protection circuit respectively
Even, the output end of the first comparator 10 is connected with the output end of second comparator 11, the first comparator 10
Electrode input end connects one end phase of one end of the first resistor 5, the other end of the first resistor 5 and the 5th resistance 9
Even, the other end of the first resistor 5 is connected with described one end of the 5th resistance 9 with power supply 4, the 5th resistance
9 other end connects the output end of the first comparator 10, described one end of the second resistance 6 and the first resistor 5
It is connected, the other end ground connection of the second resistance 6, the negative input of second comparator 11 connects the 3rd resistor 7
One end and one end of the 4th resistance 8, the other end of the 3rd resistor 7 connect power supply, and other the one of the 4th resistance 8
End ground connection.
It was found from foregoing description, the beneficial effects of the utility model are：Current value is measured using Hall element 3, will suddenly
You are output to the input of first comparator 10 and the input of the second comparator 11 by the current detection value of element 3, when electric current is examined
When the magnitude of voltage of survey is more than high voltage limit value 12 or less than lower bound magnitude of voltage 13, the output of output end 14 0 of the protection circuit
Level will close circuit output, that is, realize excessively stream short-circuit protection to control terminal；When the magnitude of voltage of current detecting is more than lower bound voltage
Value 13 and when being less than high voltage limit value 12, the magnitude of voltage of 14 out-put supply of output end 4 of the protection circuit is to control terminal, control terminal
Normal operation, do not deal with, circuit is simple, and reliability is high, is not in the phenomenon protected or do not protected by mistake.
Further, the Hall element 3 is located in the magnetic circuit of the magnetic guiding loop 1.
Seen from the above description, Hall element 3 and magnetic guiding loop 1 form a field circuit, and Ampereconductors to be measured can be
Induced-current is formed in field circuit, the field circuit simple structure easily realizes that cost is cheap.
Further, the described section of magnetic guiding loop 1 has the shape of 2/3rds circular arcs.
Seen from the above description, there are 2/3rds circular shapes can fully coat electric current to be measured and lead for the section of magnetic guiding loop 1
Body, in favor of the stability of field circuit.
Further, the electrode input end value of the first comparator 10 is high voltage limit value 12, second comparator
11 negative input is lower bound magnitude of voltage 13.
Seen from the above description, the current detection value of Hall element is entered using high voltage limit value 12 and lower bound magnitude of voltage 13
Row multilevel iudge, when the magnitude of voltage of current detecting is more than high voltage limit value 12 or less than lower bound magnitude of voltage 13, the protection
The output end of circuit exports 0 level will close circuit output to control terminal, control terminal, that is, realize excessively stream short-circuit protection；Work as electric current
When the magnitude of voltage of detection is more than lower bound magnitude of voltage 13 and is less than high voltage limit value 12, the output end out-put supply of the protection circuit
4 magnitudes of voltage control terminal normal operation, are not dealt with, control terminal is not in the phenomenon protected or do not protected by mistake to control terminal.
Fig. 1 is refer to, embodiment one of the present utility model is：
A kind of short circuit over-current protection circuit for controller for electric vehicle, including power supply 4, Hall element 3, magnetic guiding loop 1,
One resistance 5, second resistance 6,3rd resistor 7, the 4th resistance 8, the 5th resistance 9, the comparator 11 of first comparator 10 and second, institute
State magnetic guiding loop 1 to be coated in a non-contact manner around a part for Ampereconductors to be detected, the magnetic guiding loop 1 is jagged, institute
The indentation, there that Hall element 3 is arranged on the magnetic guiding loop 1 is stated, the output end of the Hall element 3 connects described first simultaneously and compared
The electrode input end of the negative input of device 10 and second comparator 11, the output end of the first comparator 10 and described
The output end of second comparator 11 is connected with the output end 14 of the protection circuit respectively, the output end of the first comparator 10
It is connected with the output end of second comparator 11, the electrode input end of the first comparator 10 connects the first resistor 5
One end, the other end of the first resistor 5 are connected with one end of the 5th resistance 9, the other end of the first resistor 5
It is connected with described one end of the 5th resistance 9 with power supply 4, the other end of the 5th resistance 9 connects the first comparator
10 output end, the second resistance 6 are connected with described one end of the first resistor 5, another termination of the second resistance 6
Ground, the negative input of second comparator 11 meet one end of the 3rd resistor 7 and one end of the 4th resistance 8, institute
The other end for stating 3rd resistor 7 connects power supply, the other end ground connection of the 4th resistance 8.
In summary, a kind of short circuit over-current protection circuit for controller for electric vehicle provided by the utility model, utilize
Hall element 3 measures current value, and the current detection value of Hall element 3 is output to the input and the second ratio of first comparator 10
It is described when the magnitude of voltage of current detecting is more than high voltage limit value 12 or less than lower bound magnitude of voltage 13 compared with the input of device 11
The output end of protection circuit exports 0 level will close circuit output to control terminal, control terminal, that is, realize excessively stream short-circuit protection；When
When the magnitude of voltage of current detecting is more than lower bound magnitude of voltage 13 and is less than high voltage limit value 12, the output end output of the protection circuit
The magnitude of voltage of power supply 4 control terminal normal operation, is not dealt with, circuit is simple, and reliability is high, is not in protect by mistake to control terminal
Or the phenomenon do not protected.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalents made using the utility model specification and accompanying drawing content, or directly or indirectly it is used in the technology neck of correlation
Domain, similarly it is included in scope of patent protection of the present utility model.
Claims (4)
1. a kind of short circuit over-current protection circuit for controller for electric vehicle, it is characterised in that including power supply, Hall element, lead
Magnet ring, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, first comparator and the second comparator, it is described
Magnetic guiding loop is coated on around a part for Ampereconductors to be detected in a non-contact manner, and the magnetic guiding loop is jagged, it is described suddenly
Your element is arranged on the indentation, there of the magnetic guiding loop, and the output end of the Hall element connects the negative pole of the first comparator simultaneously
The electrode input end of input and second comparator, the output end of the first comparator and second comparator it is defeated
Go out output end of the end respectively with the protection circuit to be connected, the output end of the first comparator and second comparator it is defeated
Go out end to be connected, the electrode input end of the first comparator connects one end of the first resistor, the other end of the first resistor
It is connected with one end of the 5th resistance, described one end and electricity of the other end of the first resistor and the 5th resistance
Source is connected, and the other end of the 5th resistance meets the output end of the first comparator, one end of the second resistance and institute
The described one end for stating first resistor is connected, the other end ground connection of the second resistance, the negative input of second comparator
Connecing one end of the 3rd resistor and one end of the 4th resistance, the other end of the 3rd resistor connects power supply, and described
The other end ground connection of four resistance.
2. the short circuit over-current protection circuit according to claim 1 for controller for electric vehicle, it is characterised in that it is described suddenly
You are located in the magnetic circuit of the magnetic guiding loop element.
3. the short circuit over-current protection circuit according to claim 2 for controller for electric vehicle, it is characterised in that described
Magnetic guiding loop has the section of 2/3rds circular shapes.
4. the short circuit over-current protection circuit according to claim 1 for controller for electric vehicle, it is characterised in that described
The electrode input end value of one comparator is high voltage limit value, and the negative input value of second comparator is lower bound magnitude of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090818.2U CN207218219U (en) | 2017-08-29 | 2017-08-29 | A kind of short circuit over-current protection circuit for controller for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090818.2U CN207218219U (en) | 2017-08-29 | 2017-08-29 | A kind of short circuit over-current protection circuit for controller for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207218219U true CN207218219U (en) | 2018-04-10 |
Family
ID=61825494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721090818.2U Active CN207218219U (en) | 2017-08-29 | 2017-08-29 | A kind of short circuit over-current protection circuit for controller for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207218219U (en) |
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2017
- 2017-08-29 CN CN201721090818.2U patent/CN207218219U/en active Active
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