CN202102070U - Phase current sampling circuit for electric vehicle motor controller - Google Patents
Phase current sampling circuit for electric vehicle motor controller Download PDFInfo
- Publication number
- CN202102070U CN202102070U CN2011201495713U CN201120149571U CN202102070U CN 202102070 U CN202102070 U CN 202102070U CN 2011201495713 U CN2011201495713 U CN 2011201495713U CN 201120149571 U CN201120149571 U CN 201120149571U CN 202102070 U CN202102070 U CN 202102070U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- phase current
- operational amplifier
- current sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
Disclosed is a phase current sampling circuit for an electric vehicle motor controller, used for judging the three phase circuit signals input via a drive circuit. The phase current sampling circuit comprises: a voltage-limiting circuit used for limiting the voltage value of the three phase circuit signals input via the drive circuit, a reference circuit for outputting a determining voltage reference to the comparison circuit, a load comparison circuit for judging whether the three phase voltage is within a normal range, and a short circuit determination circuit for determining whether the drive circuit undergoes a short circuit or not and outputting the short circuit signals. The phase current sampling circuit for an electric vehicle motor controller also comprises a false alarm signal elimination circuit for receiving signals from the load comparison circuit and ensuring that the short circuit determination circuit only comparatively inputs phase current. The phase current sampling circuit, with common circuit elements, is low in cost and convenient for maintenance and replacement. The sampling function over the drive circuit does not depend on a resistor, thereby being suitable for large power controller. The phase current sampling circuit, with the function of identifying phase current, is highly reliable in judging the short circuit situation.
Description
Technical field
The utility model relates to a kind of phase current sampling circuit of electric bicycle, relates in particular to a kind of phase current sampling circuit that is applicable to the electric machine controller of battery-operated motor cycle.
Background technology
Use electric energy as the battery-operated motor cycle of driving force because its moulding is light, can not cause tail gas pollution to be widely used.Battery-operated motor cycle is as a kind of speed per hour vehicles faster, and its power grade generally is higher than 2 kilowatts, and the phase current peak-peak of motor can be higher than 200 amperes, and the security and the reliability of electric machine controller had very high requirement.Because the sample objects of conventional electric-powered motorcycle motor controller is bus current but not phase current; Can only limit the phase current of motor indirectly; Can't accurately control; And receiving different motor parameter influences, traditional electric machine controller need be made amendment at the cut-off current under the different rotating speeds to the controller bus when the different motor of coupling, just can play the effect of protecting controller and guaranteeing motor ability maximum output torque.
Summary of the invention
The utility model aims to provide a kind of electric machine controller phase current sampling circuit of electric bicycle, is applicable to powerful electric bicycle controller, and can accurately judge the short-circuit conditions of driving circuit.
For realizing above-mentioned purpose, the utility model provides following technical scheme:
A kind of electric vehicle motor controller phase current sampling circuit; Be used to judge three-phase circuit signal from the MOSFET pipe inverter circuit input of electric machine controller; Comprise pressure limiting circuit, biasing circuit, ratio amplifying circuit and output circuit; Wherein, said electric vehicle motor controller phase current sampling circuit is promptly managed the triple-phase line sampling of inverter circuit directly from MOSFET pipe inverter circuit sampling three-phase current from the MOSFET of electric machine controller; The circuit of being sampled arrives at the ratio amplifying circuit through pressure limiting circuit; Biasing circuit also to the output of ratio amplifying circuit, guarantees that the ratio amplifying circuit has a positive voltage signal to gather altogether all the time, and the output signal of ratio amplifying circuit is exported after the output circuit pressure limiting.
Said pressure limiting circuit is made up of resistance and voltage stabilizing diode, is in series with the voltage stabilizing diode of resistance and ground connection on the three-phase input circuit respectively, and exports from the other end of resistance.
Said biasing circuit is made up of input end V1, electrochemical capacitor, electric capacity, accurate integrated regulator and resistance; To ground, electrochemical capacitor E1, accurate integrated regulator U2, resistance R 18 and R19 are parallelly connected with this electric capacity respectively through resistance R 17, capacitor C 5 for said input end V1.
Said ratio amplifying circuit is made up of input end V2, resistance, operational amplifier and electric capacity; One operational amplifier is arranged respectively on each circuitry phase; The anode of operational amplifier links to each other with the output terminal of pressure limiting circuit, and the anode of operational amplifier is connected to the series connection point between resistance R 18, R19 through resistance; The negative terminal of operational amplifier arrives ground through resistance, and the negative terminal of operational amplifier is connected with the output terminal of operational amplifier through resistance; The output terminal of operational amplifier arrives ground through resistance, electric capacity.
Said output circuit is made up of input end V3 and diode, and input end V3 is connected to the output terminal resistance of operational amplifier and the series connection point between electric capacity through diode.
The utlity model has following advantage:
1. the sample objects of electric machine controller is phase current but not bus current, and sampling accurately;
2. can be applicable to various types of motors, the development trend of symbol battery-operated motor cycle high-power;
3. entire circuit is used common circuit elements device, and is with low cost, the convenient for maintaining replacement.
Description of drawings
Accompanying drawing 1 is the circuit diagram of the utility model.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing makes the utility model and further describing:
A kind of electric vehicle motor controller phase current sampling circuit; Be used to judge three-phase circuit signal from the MOSFET pipe inverter circuit input of electric machine controller; Comprise pressure limiting circuit, biasing circuit, ratio amplifying circuit and output circuit; Wherein, said electric vehicle motor controller phase current sampling circuit is promptly managed the triple-phase line sampling of inverter circuit directly from MOSFET pipe inverter circuit sampling three-phase current from the MOSFET of electric machine controller; The circuit of being sampled arrives at the ratio amplifying circuit through pressure limiting circuit; Biasing circuit also to the output of ratio amplifying circuit, guarantees that the ratio amplifying circuit has a positive voltage signal to gather altogether all the time, and the output signal of ratio amplifying circuit is exported after the output circuit pressure limiting.
MOSFET pipe Q1, Q2, Q3, Q4, Q5, Q6 form three phase bridge; From input end UDC through Q1, Q2 to ground, Q3, Q4 and Q5, Q6 are all parallelly connected with Q1, Q2, phase line U is connected between Q1, the Q2; Phase line V is connected between Q3, the Q4; Phase line W is connected between Q5, the Q6, and the tube voltage drop that produces when wherein descending three MOSFET pipe Q2, Q4, the Q6 upper reaches of bridge is respectively through phase line U, V, W input the utility model electric vehicle motor controller phase current sampling circuit, as the sampled signal source.
Input end V1, electrochemical capacitor E1, capacitor C 5, accurate integrated regulator U2 and resistance R 17, R18, R19 form biasing circuit.Input end V1 is 15V, and to ground, electrochemical capacitor E1, accurate integrated regulator U2, resistance R 18 and R19 are parallelly connected with this capacitor C 5 respectively through resistance R 17, capacitor C 5.
Input end V2, resistance R 1, R2, R3, R5, R6, R7, R8, R10, R11, R12, R13, operational amplifier U1A, U1B, U1D and capacitor C 1, C2, C4 proportion of composing amplifying circuit.One operational amplifier is arranged respectively on each circuitry phase, and the anode of operational amplifier links to each other with the output terminal of pressure limiting circuit, and the anode of operational amplifier is connected to the series connection point between resistance R 18, R19 through resistance; The negative terminal of operational amplifier arrives ground through resistance, and the negative terminal of operational amplifier is connected with the output terminal of operational amplifier through resistance; To ground, the pin 4 of the operational amplifier U1A that U goes up mutually is connected with the input end V2 of 15V the output terminal of operational amplifier, another pin ground connection of U1A through resistance, electric capacity.
Be specially; U goes up mutually; Resistance R 14 links to each other with the anode 12 of operational amplifier U1D, and the anode 12 of operational amplifier U1D is connected to the series connection point between resistance R 18, R19 through resistance R 16, the negative terminal 13 of operational amplifier U1D through resistance R 12 to ground; And the negative terminal 13 of operational amplifier U1D is connected with the output terminal 14 of operational amplifier U1D through resistance R 11, and the output terminal 14 of operational amplifier U1D arrives ground through resistance R 13, capacitor C 4; V goes up mutually; Resistance R 19 links to each other with the anode 5 of operational amplifier U1B; And the anode 5 of operational amplifier U1B is connected to the series connection point between resistance R 18, R19 through resistance R 10; To ground, and connect with the output terminal 7 of operational amplifier U1D through resistance R 6 by the negative terminal 6 of operational amplifier U1B through resistance R 7 for the negative terminal 6 of operational amplifier U1B, and the output terminal 7 of operational amplifier U1B arrives ground through resistance R 8, capacitor C 2; W goes up mutually; Resistance R 4 links to each other with the anode 3 of operational amplifier U1A; And the anode 3 of operational amplifier U1A is connected to the series connection point between resistance R 18, R19 through resistance R 5; To ground, and connect with the output terminal 1 of operational amplifier U1A through resistance R 1 by the negative terminal 2 of operational amplifier U1A through resistance R 2 for the negative terminal 2 of operational amplifier U1A, and the output terminal 1 of operational amplifier U1A arrives ground through resistance R 3, capacitor C 1.
Utmost point pipe is connected to the output terminal resistance of operational amplifier and the series connection point between electric capacity, is specially, and U goes up mutually, and input end V3 is connected with series connection point between R13, C4 through diode D3; V goes up mutually, and input end V3 is made up of input end V3 and diode D1, D2, D3 through two said output circuits, and input end V3 is connected with series connection point between R8, C2 through diode D2; W goes up mutually, and input end V3 is connected with series connection point between R3, C1 through diode D1.
When the U of the utility model works mutually, between MOSFET pipe Q1, Q2, sample, the R9 that flows through utilizes diode Z3 amplitude limit, flows into the anode 12 of operational amplifier U1D again, is handled after resistance R 13 outputs should moment U phase current values by operational amplifier U1D.The principle of work of V phase, W circuitry phase is mutually identical with U.
Claims (5)
1. electric vehicle motor controller phase current sampling circuit; Be used to judge three-phase circuit signal from the MOSFET pipe inverter circuit input of electric machine controller; Comprise pressure limiting circuit, biasing circuit, ratio amplifying circuit and output circuit; It is characterized in that said electric vehicle motor controller phase current sampling circuit is promptly managed the triple-phase line sampling of inverter circuit directly from MOSFET pipe inverter circuit sampling three-phase current from the MOSFET of electric machine controller; The circuit of being sampled arrives at the ratio amplifying circuit through pressure limiting circuit; Biasing circuit also to the output of ratio amplifying circuit, guarantees that the ratio amplifying circuit has a positive voltage signal to gather altogether all the time, and the output signal of ratio amplifying circuit is exported after the output circuit pressure limiting.
2. electric vehicle motor controller phase current sampling circuit as claimed in claim 1; It is characterized in that; Said pressure limiting circuit is made up of resistance and voltage stabilizing diode, is in series with the voltage stabilizing diode of resistance and ground connection on the three-phase input circuit respectively, and exports from the other end of resistance.
3. according to claim 1 or claim 2 electric vehicle motor controller phase current sampling circuit; It is characterized in that; Said biasing circuit is made up of input end (V1), electrochemical capacitor, electric capacity, accurate integrated regulator and resistance; Said input end (V1) arrives ground, electrochemical capacitor (E1), accurate integrated regulator (U2), resistance (R18) and (R19) parallelly connected with this electric capacity respectively through resistance (R17), electric capacity (C5).
4. according to claim 1 or claim 2 electric vehicle motor controller phase current sampling circuit; It is characterized in that; Said ratio amplifying circuit is made up of input end (V2), resistance, operational amplifier and electric capacity, and an operational amplifier is arranged respectively on each circuitry phase, and the anode of operational amplifier links to each other with the output terminal of pressure limiting circuit; And the anode of operational amplifier is connected to the series connection point between resistance (R18, R19) through resistance; To ground, and connect with the output terminal of operational amplifier through resistance by the negative terminal of operational amplifier through resistance for the negative terminal of operational amplifier, and the output terminal of operational amplifier arrives ground through resistance, electric capacity; One pin of the operational amplifier that U goes up mutually is connected with input end (V2), another pin ground connection.
5. according to claim 1 or claim 2 electric vehicle motor controller phase current sampling circuit; It is characterized in that; Said output circuit is made up of input end (V3) and diode, and input end (V3) is connected to the output terminal resistance of operational amplifier and the series connection point between electric capacity through diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201495713U CN202102070U (en) | 2011-05-12 | 2011-05-12 | Phase current sampling circuit for electric vehicle motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201495713U CN202102070U (en) | 2011-05-12 | 2011-05-12 | Phase current sampling circuit for electric vehicle motor controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202102070U true CN202102070U (en) | 2012-01-04 |
Family
ID=45388075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201495713U Expired - Fee Related CN202102070U (en) | 2011-05-12 | 2011-05-12 | Phase current sampling circuit for electric vehicle motor controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202102070U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344811A (en) * | 2013-06-27 | 2013-10-09 | 浙江联宜电机股份有限公司 | Current detecting circuit of direct-current motor |
| CN104090145B (en) * | 2014-07-23 | 2017-01-18 | 武汉理工大学 | Inverter circuit current sampling circuit combined with mutual inductor and sampling resistor |
| CN107040180A (en) * | 2017-05-31 | 2017-08-11 | 南京懂玫驱动技术有限公司 | A kind of phase current Acquisition Circuit of FOC electric machine controllers |
| CN110208592A (en) * | 2019-05-23 | 2019-09-06 | 淮安中科晶上智能网联研究院有限公司 | A kind of three-phase current method of sampling of three-phase motor |
| CN110596445A (en) * | 2019-09-09 | 2019-12-20 | 南京快轮智能科技有限公司 | Electric vehicle current measuring method |
-
2011
- 2011-05-12 CN CN2011201495713U patent/CN202102070U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344811A (en) * | 2013-06-27 | 2013-10-09 | 浙江联宜电机股份有限公司 | Current detecting circuit of direct-current motor |
| CN103344811B (en) * | 2013-06-27 | 2016-06-08 | 浙江联宜电机股份有限公司 | A kind of DC motor current detection circuit |
| CN104090145B (en) * | 2014-07-23 | 2017-01-18 | 武汉理工大学 | Inverter circuit current sampling circuit combined with mutual inductor and sampling resistor |
| CN107040180A (en) * | 2017-05-31 | 2017-08-11 | 南京懂玫驱动技术有限公司 | A kind of phase current Acquisition Circuit of FOC electric machine controllers |
| CN110208592A (en) * | 2019-05-23 | 2019-09-06 | 淮安中科晶上智能网联研究院有限公司 | A kind of three-phase current method of sampling of three-phase motor |
| CN110208592B (en) * | 2019-05-23 | 2021-05-28 | 淮安中科晶上智能网联研究院有限公司 | Three-phase current sampling method of three-phase motor |
| CN110596445A (en) * | 2019-09-09 | 2019-12-20 | 南京快轮智能科技有限公司 | Electric vehicle current measuring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202102070U (en) | Phase current sampling circuit for electric vehicle motor controller | |
| CN203481800U (en) | Protective device for motor inverter for new energy vehicle | |
| CN105680417B (en) | A kind of active short-circuit control circuit and control method | |
| CN102162833B (en) | Method and circuit for detecting working condition of relay in high voltage loop of electric automobile | |
| CN103280771A (en) | Motor controller overcurrent judgment and protection circuit | |
| CN202772829U (en) | Automobile generator voltage adjusting device | |
| CN205232007U (en) | On -vehicle switching power supply operating condition indicating circuit | |
| CN201335880Y (en) | Shaft current detection device for generator | |
| CN204269735U (en) | A kind of insulation failure detection circuit of electrokinetic cell bag | |
| CN104779584A (en) | Frequency changer detection protection circuit | |
| CN102780208B (en) | Short circuit protective circuit of motor controller | |
| CN202050228U (en) | Short circuit protective circuit of motor controller | |
| CN207150418U (en) | Current foldback circuit and motor driver | |
| CN203502562U (en) | Relay state detection circuit | |
| CN202059186U (en) | Signal conditioning circuit used in grid-connected generation system | |
| CN205509477U (en) | Overload and overcurrent protect device that brushless DC motor used | |
| CN2758125Y (en) | Controller of intelligent electric power car | |
| CN103323657A (en) | Motor controller overcurrent judgment circuit | |
| CN204279116U (en) | A kind of electric drive system for electric vehicles initiatively short-circuit protection circuit | |
| CN203151083U (en) | Short circuit protection circuit of IGBT module | |
| CN202978236U (en) | Current limiting protection circuit of AC current of photovoltaic inverter | |
| CN208226558U (en) | A kind of motor protective circuit | |
| CN207689636U (en) | High-voltage relay adhesion real-time detection apparatus | |
| CN207339234U (en) | A kind of contactor protective device and alternating-current charging pile | |
| CN205319691U (en) | Dynamic brake and corresponding servo driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20140512 |