CN207251183U - A kind of overvoltage crowbar of electric machine controller - Google Patents
A kind of overvoltage crowbar of electric machine controller Download PDFInfo
- Publication number
- CN207251183U CN207251183U CN201721302402.2U CN201721302402U CN207251183U CN 207251183 U CN207251183 U CN 207251183U CN 201721302402 U CN201721302402 U CN 201721302402U CN 207251183 U CN207251183 U CN 207251183U
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- circuit
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- signal processor
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Abstract
The utility model belongs to a kind of circuit design,Specially one kind is when system detectio is to bus overvoltage,Bus capacitor can also be stored the overvoltage crowbar for the electric machine controller that over-pressed voltage is released while cut-out busbar voltage rapidly,Including energy storage filter circuit (1),Slow discharge circuit (2),Overvoltage detection comparison circuit (3),DSP digital signal processor (4),Quick discharging circuit (5) and load discharge circuit (6),Energy storage filter circuit (1) for storing the voltage on busbar and filter out power supply ripple interference is connected with slow discharge circuit (2),It is connected at the same time with overvoltage detection comparison circuit (3),It is described overvoltage detection comparison circuit (3) respectively with DSP digital signal processor (4),Quick discharging circuit (5) connects,The DSP digital signal processor (4) is connected with quick discharging circuit (5),The quick discharging circuit (5) is connected with load discharge circuit (6).
Description
Technical field
The utility model belongs to a kind of circuit design, is specially a kind of overvoltage crowbar of electric machine controller.
Background technology
In global economy rapid growth, energy consumption is continuously increased, and under the background that environmental problem is increasingly sharpened, China starts
Development of EV is widelyd popularize, wherein electric motor and controller technology is one of key components of electric automobile.Due to electricity
The motor of electrical automobile during the work time can be there are inverse electromotive force, this inverse electromotive force directly can directly be superimposed upon power source bus
On, then when the crest voltage of inverse electromotive force is excessive, easily makes the electronic unit of in-car and be damaged because of overvoltage, and
The safety and stability reliability of these electronic units plays key effect to the driving safety of electric automobile.It the particularly important is electricity
One of machine controller, its key safety parts as electric automobile, its security reliability has vehicle safe driving
Decisive role, therefore seem to electric machine controller progress overvoltage protection control and be even more important.
And protection signal caused by the overvoltage crowbar of electric machine controller of the prior art is directly to export, directly
Busbar voltage is cut off, is not discharged timely for the over-pressed voltage stored on bus capacitor, if under disturbed condition
Occur the situation of overvoltage repeatedly, easily cause over voltage alarm always, thereby increases and it is possible to other electronic units are caused to damage, so as to influence
The stability of vehicle, causes vehicle to occur security risk when driving.
Utility model content
The purpose of this utility model is that, there is provided one kind, can be in cut-out busbar rapidly when system detectio is to bus overvoltage
Also bus capacitor can be stored the overvoltage crowbar for the electric machine controller that over-pressed voltage is released while voltage.
Technical solution is used by solving its technical problem：A kind of overvoltage crowbar of electric machine controller, including storage
Can filter circuit, slow discharge circuit, overvoltage detection comparison circuit, DSP digital signal processor, quick discharging circuit and load
Discharge circuit, for storing the voltage on busbar and filtering out energy storage filter circuit and the slow discharge circuit company of power supply ripple interference
Connect, at the same with overvoltage detection comparison circuit be connected, it is described overvoltage detection comparison circuit respectively with DSP digital signal processor, soon
Fast discharge circuit connection, the DSP digital signal processor are connected with quick discharging circuit, the quick discharging circuit and load
Discharge circuit connects.
Preferably, the energy storage filter circuit includes energy storage filter capacitor C1 and C2 in parallel, the slowly electric discharge electricity
Road includes the discharge resistance R1 and R2 of series connection, and the overvoltage detection comparison circuit includes resistance R3, R4, R5, R6, R7, comparator
U1B, the quick discharging circuit includes resistance R8, R9, R10, diode D1, D2, D3, D4, triode Q1, metal-oxide-semiconductor Q2, described
Load discharge circuit is power circuit；
The both ends of busbar access in parallel energy storage filter capacitor C1 and C2, energy storage filter capacitor C1 and C2 are respectively with connecting
Discharge resistance R1 is connected with R2 both ends, resistance R3 with the R4 both ends connected, the connecting line access comparator U1B's of resistance R3 and R4
Cathode, the one end of the anode of comparator U1B respectively with resistance R5, R6 are connected, and the other end of resistance R4 and R6 are with comparator U1B's
Output terminal connects, and is grounded, and the output terminal of comparator U1B is connected by feedback resistance R7 with the other end of resistance R5, is connect at the same time
Cathode of the output terminal of high level VCC, comparator U1B respectively with DSP digital signal processor, diode D1 is connected, DSP numerals
Signal processor is connected by diode D2 with the anode of diode D1, while connects one end of resistance R10, and resistance R10's is another
The base stage of one end access triode Q1, the emitter ground connection of triode Q1, collector pass through resistance R9 grid with metal-oxide-semiconductor Q2 respectively
Pole, the cathode connection of diode D3, the source electrode with metal-oxide-semiconductor Q2, the other end of resistance R3 are connected the anode of diode D3 respectively, together
When resistance R8 it is in parallel with diode D3, the drain electrode of metal-oxide-semiconductor Q2 is connected by diode D4 with power circuit.
The utility model has the following advantages：The overvoltage crowbar of the electric machine controller of the utility model has following
Advantage：1st, the energy storage filter circuit of bus capacitor, filters out power supply ripple interference so that female at the same time for storing the voltage on busbar
Supply voltage on line is more smooth, the steady operation of safeguards system.
2nd, the slow play discharge resistance of bus capacitor, for after busbar voltage is closed, slowly releasing on bus capacitor
The busbar voltage of storage, to ensure electric machine controller after power-off does not work a period of time, the voltage of bus capacitor is 0V.Improve
The security reliability of system.
3rd, busbar voltage overvoltage detection comparison circuit, for being detected in real time to busbar voltage, and makes rapidly the ratio of voltage
Compared with judgement, the judging result of overvoltage protection signal is notified DSP digital signal processor, while this overvoltage protection signal can also be controlled
The busbar voltage quick discharging circuit of rear class processed carries out switch motion.
4th, DSP digital signal processor, is the heart of whole electric machine controller, it is configured with a special interface and is used for
Receive the overvoltage protection signal of " busbar voltage overvoltage detection comparison circuit " output, and have all the way with overvoltage protection signal " mutually with "
Act on busbar voltage quick discharging circuit.
5th, the quick discharging circuit of electric machine controller, for the over-pressed voltage stored on bus capacitor quickly to be released.
This circuit amplifies the driving force of control signal by a transistor circuit, with the conducting and cut-off of control electric discharge metal-oxide-semiconductor
To realize the switch motion of discharge circuit.
6th, load discharge circuit, for the load as quick discharging circuit, disappears the over-pressed voltage that bus capacitor stores
Consume.Consider that the power circuit that selection system carries is most preferable as depletion load for cost and the structure of circuit system
Mode because the power circuit of system is the design method using wide input voltage, can sustain busbar crosses piezoelectricity
The peak value of pressure, so both saves cost, also so that circuit is more succinct.
Brief description of the drawings
Fig. 1 is the structure diagram of the overvoltage crowbar of the electric machine controller of the utility model.
Brief description of the drawings：1st, energy storage filter circuit, 2, slow discharge circuit, 3, overvoltage detection comparison circuit, 4, DSP numeral letters
Number processor, 5, quick discharging circuit, 6, load discharge circuit.
Embodiment
As shown in the figure, a kind of overvoltage crowbar of electric machine controller, including energy storage filter circuit 1, slow discharge circuit
2nd, overvoltage detection comparison circuit 3, DSP digital signal processor 4, quick discharging circuit 5 and load discharge circuit 6, its feature exist
In, the energy storage filter circuit 1 for storing the voltage on busbar and filter out power supply ripple interference is connected with slow discharge circuit 2,
Be connected at the same time with overvoltage detection comparison circuit 3, the overvoltage detection comparison circuit 3 respectively with DSP digital signal processor 4, fast
Fast discharge circuit 5 connects, and the DSP digital signal processor 4 is connected with quick discharging circuit 5, the quick discharging circuit 5 with
Load discharge circuit 6 connects.
The energy storage filter circuit 1 includes energy storage filter capacitor C1 and C2 in parallel, and the slowly discharge circuit 2 includes string
The discharge resistance R1 and R2 of connection, the overvoltage detection comparison circuit 3 includes resistance R3, R4, R5, R6, R7, comparator U1B, described
Quick discharging circuit 5 includes resistance R8, R9, R10, diode D1, D2, D3, D4, triode Q1, metal-oxide-semiconductor Q2, and the load is put
Circuit 6 is power circuit；
The both ends of busbar access in parallel energy storage filter capacitor C1 and C2, energy storage filter capacitor C1 and C2 are respectively with connecting
Discharge resistance R1 is connected with R2 both ends, resistance R3 with the R4 both ends connected, the connecting line access comparator U1B's of resistance R3 and R4
Cathode, the one end of the anode of comparator U1B respectively with resistance R5, R6 are connected, and the other end of resistance R4 and R6 are with comparator U1B's
Output terminal connects, and is grounded, and the output terminal of comparator U1B is connected by feedback resistance R7 with the other end of resistance R5, is connect at the same time
Cathode of the output terminal of high level VCC, comparator U1B respectively with DSP digital signal processor 4, diode D1 is connected, DSP numbers
Word signal processor 4 is connected by diode D2 with the anode of diode D1, while connects one end of resistance R10, resistance R10's
The base stage of other end access triode Q1, the emitter ground connection of triode Q1, collector is by resistance R9 respectively with metal-oxide-semiconductor Q2's
The cathode connection of grid, diode D3, the source electrode with metal-oxide-semiconductor Q2, the other end of resistance R3 are connected the anode of diode D3 respectively,
Resistance R8 is in parallel with diode D3 at the same time, and the drain electrode of metal-oxide-semiconductor Q2 is connected by diode D4 with power circuit.
In the specific implementation, after busbar path is opened, supply voltage can be flowed on busbar, pass through the storage of bus capacitor
After filtering, power supply ripple interference can be filtered out so that the supply voltage on busbar is more smooth, due on bus capacitor
The presence of slow play discharge resistance, has very small part voltage energy to be discharged resistance consumption and falls, because discharge resistance value is very
Greatly, discharge current very little, so will not be impacted to busbar voltage.When the overvoltage detection comparison circuit of busbar voltage, detection
To busbar voltage less than below alarming value, the overvoltage protection signal of output is low level, then will not drive the mistake for opening rear class
Quick discharging circuit is pressed, when detecting that busbar voltage is higher than alarming value, the overvoltage protection signal of high level can be exported at once, this
There is bus overvoltage dangerous situation in notice DSP digital signal processor motor at once for the meeting of overvoltage protection signal, and request DSP is closed
Busbar power path is closed, while this overvoltage protection signal also opens the over-pressed quick discharging circuit of rear class at once, bus capacitor
The over-pressed voltage of upper storage is released rapidly, to reach the stabilization of the driving performance of the safety of protection finished vehicle electronic component and vehicle
Property.
The design considers from design cost is reduced, and makes full use of the existing design circuit of system itself, realizes in system
When detecting bus overvoltage, also bus capacitor can be stored over-pressed voltage while cut-out busbar voltage rapidly and released,
Reach the over-voltage protecting function to electric machine controller busbar voltage, to ensure the travelling of the safety of finished vehicle electronic component and vehicle
The stability of energy.
Using the above-mentioned desirable embodiment according to utility model as enlightenment, pass through above-mentioned description, relevant staff
Various changes and amendments can be carried out in the range of without departing from this item utility model technological thought completely, this item is practical
New technical scope is not limited to the content on specification, it is necessary to determines that its is technical according to right
Scope.
Claims (2)
- A kind of 1. overvoltage crowbar of electric machine controller, it is characterised in that：Including energy storage filter circuit (1), slowly discharge electricity Road (2), overvoltage detection comparison circuit (3), DSP digital signal processor (4), quick discharging circuit (5) and load discharge circuit (6), it is characterised in that for store the voltage on busbar and filter out power supply ripple interference energy storage filter circuit (1) with slowly Discharge circuit (2) connect, while with overvoltage detection comparison circuit (3) be connected, it is described overvoltage detect comparison circuit (3) respectively with DSP digital signal processor (4), quick discharging circuit (5) connection, the DSP digital signal processor (4) and repid discharge electricity Road (5) connects, and the quick discharging circuit (5) is connected with load discharge circuit (6).
- 2. the overvoltage crowbar of electric machine controller according to claim 1, it is characterised in that：The energy storage filter circuit (1) energy storage filter capacitor C1 and C2 in parallel are included, the slowly discharge circuit (2) includes the discharge resistance R1 and R2 of series connection, The overvoltage detection comparison circuit (3) includes resistance R3, R4, R5, R6, R7, comparator U1B, quick discharging circuit (5) bag Resistance R8, R9, R10, diode D1, D2, D3, D4, triode Q1, metal-oxide-semiconductor Q2 are included, the load discharge circuit (6) is power supply Circuit；Busbar access energy storage filter capacitor C1 and C2 in parallel, the both ends electric discharge with connecting respectively of energy storage filter capacitor C1 and C2 Resistance R1 is connected with R2 both ends, resistance R3 with the R4 both ends connected, and the connecting line access comparator U1B of resistance R3 and R4 are just Pole, the one end of the anode of comparator U1B respectively with resistance R5, R6 are connected, and the other end of resistance R4 and R6 is defeated with comparator U1B's Outlet connects, and is grounded, and the output terminal of comparator U1B is connected by feedback resistance R7 with the other end of resistance R5, while connects height Cathode of the output terminal of level VCC, comparator U1B respectively with DSP digital signal processor (4), diode D1 is connected, DSP numbers Word signal processor (4) is connected by diode D2 with the anode of diode D1, while connects one end of resistance R10, resistance R10 Other end access triode Q1 base stage, the emitter ground connection of triode Q1, collector by resistance R9 respectively with metal-oxide-semiconductor Q2 Grid, diode D3 cathode connection, the source electrode with metal-oxide-semiconductor Q2, the other end of resistance R3 connect respectively for the anode of diode D3 Connect, while resistance R8 is in parallel with diode D3, the drain electrode of metal-oxide-semiconductor Q2 is connected by diode D4 with power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721302402.2U CN207251183U (en) | 2017-09-30 | 2017-09-30 | A kind of overvoltage crowbar of electric machine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721302402.2U CN207251183U (en) | 2017-09-30 | 2017-09-30 | A kind of overvoltage crowbar of electric machine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251183U true CN207251183U (en) | 2018-04-17 |
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ID=61890951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721302402.2U Expired - Fee Related CN207251183U (en) | 2017-09-30 | 2017-09-30 | A kind of overvoltage crowbar of electric machine controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207251183U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038483A (en) * | 2018-10-31 | 2018-12-18 | 奥克斯空调股份有限公司 | Overvoltage crowbar |
| CN109599834A (en) * | 2017-09-30 | 2019-04-09 | 龙海特尔福汽车电子研究所有限公司 | A kind of overvoltage crowbar of electric machine controller |
-
2017
- 2017-09-30 CN CN201721302402.2U patent/CN207251183U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599834A (en) * | 2017-09-30 | 2019-04-09 | 龙海特尔福汽车电子研究所有限公司 | A kind of overvoltage crowbar of electric machine controller |
| CN109038483A (en) * | 2018-10-31 | 2018-12-18 | 奥克斯空调股份有限公司 | Overvoltage crowbar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210421 Address after: 201399 floor 1-3, building 7, 233 Yuanzhong Road, Huinan Town, Pudong New Area, Shanghai Patentee after: Shanghai shuozhan Auto Electronics Co.,Ltd. Address before: No. 2 building Park of Longhai Economic Development Zone, Longhai Economic Development Zone, Zhangzhou, Fujian Patentee before: LONGHAI TEV AUTOMOTIVE ELECTRONIC RESEARCH INSTITUTE Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |