CN104135142A - Filter circuit of an asynchronous motor drive controller of an electric vehicle and method thereof - Google Patents

Filter circuit of an asynchronous motor drive controller of an electric vehicle and method thereof Download PDF

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Publication number
CN104135142A
CN104135142A CN201410365068.XA CN201410365068A CN104135142A CN 104135142 A CN104135142 A CN 104135142A CN 201410365068 A CN201410365068 A CN 201410365068A CN 104135142 A CN104135142 A CN 104135142A
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Prior art keywords
power
filter circuit
circuit
filter
electric capacity
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CN201410365068.XA
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Chinese (zh)
Inventor
伍泽东
任亚辉
况明伟
舒军
郑刚
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Dongfang Electric Corp
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Dongfang Electric Corp
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Priority to CN201410365068.XA priority Critical patent/CN104135142A/en
Publication of CN104135142A publication Critical patent/CN104135142A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a filter circuit of an asynchronous motor drive controller of an electric vehicle and a method thereof. The filter circuit consists of a control power filter circuit, a power filter circuit and a CAN communication bus filter circuit, wherein the control power filter circuit is used for filtering input weak electricity power supply and then transmits the input weak electricity power supply to a control circuit, and the power filter circuit is used for restraining the peak voltage of input power supply and in the meantime restraining the interference of a power circuit on the input power supply; the CAN communication bus filter circuit is used for the filtering and the electrostatic protection of the high-frequency electromagnetic noises of communication signals. By means of this method, the electromagnetic compatibility of various functional units is enhanced efficiently, the peak voltage can be absorbed and consumed in the meantime, and then the reliability of filter components is enhanced; the damage of peak voltage to following power components can be avoided, and then conducted disturbance of power circuit to high-voltage power supply can be restrained efficiently. The filter circuit has the advantages of simple circuit structure, simple and highly reliable electromagnetic compatibility scheme, and low cost.

Description

A kind of filter circuit and method of electric motor car Induction Motor-Driven controller
Technical field
The present invention relates to filtering technique, particularly relate to a kind of filter circuit and method of electric motor car asynchronous machine controller.
Background technology
Motor of electric motor car driving governor is as one of kernel component of electric automobile, in meeting function and performance requirement, also must have the feature of safety, reliable, stable operation.In electric motor car, electric apparatus mounted on vehicle is many, and is with traditional combustion engine automobile difference, and electric motor car is the application scenario that belongs to forceful electric power, and these application cause strong and weak electricity coupling in electric motor car to exist, electromagnetic environment complexity on car.So it is particularly important that the Electromagnetic Compatibility of electric equipment seems, especially be directed to vehicle motor controller, as the power-equipment of electric motor car, its Electromagnetic Compatibility is not only the prerequisite of automobile motor driving governor reliability service, especially the guarantee of electric motor car safe operation.So, motor of electric motor car driving governor is carried out to EMC Design just particularly important.
Motor of electric motor car driving governor is one and has gathered electrical source of power, control power supply and CAN bus communication in the electric equipment of one.Controlling power supply is that control circuit is powered, be interfered when controlling power supply, can cause the irregular working of control circuit, control the breaking-up that the peak voltage containing in power supply even can cause control circuit chips, cause vehicle motor controller device damage, even cause the irregular working of other mobile units, jeopardize the traffic safety of electric motor car; The CAN communication bus of automobile motor driving governor comes from the instruction of other mobile units and transmits own current state to bus for receiving, when signal is interfered, instruction meeting is resolved mistake, in equipment running process, the instruction of mistake causes control mistake, especially when motor vehicle is during at high-speed cruising, control mistake and will seriously jeopardize traffic safety and cause personal injury; Same, in electrical source of power with spike burr will cause the irrecoverable injury of power device, cause device damage.At present, because electric motor car is in the elementary step, the EMC Design of automobile motor driving governor is not also had to very complete solution.
Summary of the invention
The present invention aims to provide a kind of filter circuit and method of electric motor car Induction Motor-Driven controller, evade the conducted interference that harmful effect that electromagnetic interference causes automobile motor driving governor and automobile motor driving governor itself bring, by carrying out filter design targetedly to controlling power supply, electrical source of power and CAN bus, the Electromagnetic Compatibility that improves automobile motor driving governor, makes its safe and reliable operation.
For achieving the above object, technical scheme of the present invention is as follows:
A filter circuit for electric motor car Induction Motor-Driven controller, is characterized in that comprising:
Control electric source filter circuit, the input of one end access control power supply, the other end is connected to the power input interface of control circuit, described control electric source filter circuit is processed rear access control circuit for the light current power supply of input being carried out to filtering, can suppress the peak voltage of light current power supply, filtering burr and noise, electrostatic protection, and inhibitory control circuit conduction interference that input power is brought;
Electrical source of power filter circuit, the input in electrical source of power is accessed in one end, the other end is connected to the electrical source of power input of loop of power circuit, and described electrical source of power filter circuit is used for suppressing power input power peak voltage, suppresses the interference that loop of power circuit is introduced power input power simultaneously;
CAN communication bus filter circuit, outside CAN bus is accessed in one end, and the other end is connected with control circuit by CAN interface, and described CAN communication bus filter circuit is for carrying out filtering and electrostatic protection to the high-frequency electromagnetic noise of signal of communication.
Described control electric source filter circuit comprises TVS pipe (transient voltage twin zener dioder), piezo-resistance, X electric capacity, common mode choke and electromagnetic interface filter (Electromagnetic interference filter).X electric capacity, common mode choke and electromagnetic interface filter combination herein realize the inhibition to common-mode signal and difference mode signal, and it is expressed as by frequency:
Common-mode signal is by frequency:
Difference mode signal is by frequency:
In above-mentioned formula, for the inductance value of common mode choke, for the inductance value of electromagnetic interface filter, for the X capacitance of electromagnetic interface filter, for the Y capacitance of electromagnetic interface filter, for the capacitance of X electric capacity.
Control after power supply access control electric source filter circuit, TVS pipe, piezo-resistance and X electric capacity are all connected across the both positive and negative polarity of controlling power supply input successively, then access the input side of common mode choke, the input side of the outlet side access electromagnetic interface filter of common mode choke, the power port of last access control circuit.
Described electrical source of power filter circuit comprises power resistor, X electric capacity and Y electric capacity, after electrical source of power access, cross-over connection power resistor, the power resistor of cross-over connection plays the effect of bleeder resistance, can be fast by remaining forceful electric power consumption with controller after ensureing power-off, X electric capacity is connected across the positive and negative end of forceful electric power, and one end of Y electric capacity is connected with negative pole respectively at anodal, another termination controller casing of Y electric capacity; X electric capacity and Y electric capacity, except absorbing the function of peak voltage, have simultaneously and suppress the interference that major loop is introduced electrical source of power, and the principle of its inhibition shows as:
Common-mode signal is by frequency:
Difference mode signal is by frequency:
In above-mentioned formula, for the stray inductance of loop of power circuit, for the capacitance of X electric capacity, with for the capacitance of selected Y electric capacity.
Described CAN communication bus filter circuit comprises TVS pipe, feed-through capacitor and pi type filter; Described pi type filter refers to π type LC type filter network, and its cut-off frequency is:
The two ends cross-over connection TVS pipe of outside CAN bus, then feed-through capacitor is accessed respectively at the two ends of CAN bus, then connects pi type filter, and pi type filter is connected to the bus incoming end of control circuit; The casing of the ground termination controller of described feed-through capacitor.
The filtering method corresponding with above-mentioned filter circuit, is characterized in that:
Control after power supply access control electric source filter circuit, TVS pipe is for absorbing the energy of due to voltage spikes, static discharge, burst of pulses and surge voltage, ensure that late-class circuit is not affected, the leakage path of the energy that piezo-resistance absorbs as TVS pipe, then control power supply and be linked into the circuit being formed by X electric capacity, common mode choke and electromagnetic interface filter, by this circuit, the control power supply of input is carried out to filtering, prevent the conduction interference of control circuit simultaneously;
After electrical source of power access electrical source of power filter circuit, the positive and negative end cross-over connection power resistor of electrical source of power and X electric capacity; When after controller power-off, power resistor is for the remaining forceful electric power of releasing fast, and X electric capacity, for absorbing the peak voltage that electrical source of power input is brought, is protected the safety of rear class power device; Meanwhile, the conduction interference that the combinational circuit of X electric capacity and Y electric capacity is introduced to electrical source of power for suppressing loop of power circuit;
Outside CAN bus; because of its communication frequency high; electromagnetic noise interference impact is large; after access CAN communication bus filter circuit; the TVS pipe of cross-over connection is for the protection of static; the feed-through capacitor of access is used for suppressing high-frequency electromagnetic noise, and the pi type filter of access is for suppressing the coupling electromagnetic interference on CAN communication bus.
Control in electric source filter circuit:
The selection principle of TVS pipe: specified instantaneous peak value pulse current , maximum clamp voltage value , transient pulse power ;
The type selecting of piezo-resistance is mainly carried out type selecting according to its pressure sensitive voltage and power;
According to concrete applied environment and relevant electromagnetic compatibility standard, determine the cut-off frequency of common-mode signal and difference mode signal, in the time of the cut-off frequency of known common-mode signal and difference mode signal, X electric capacity is rule of thumb selected, and selects different X capacity types according to different voltage;
The inner Y electric capacity of electromagnetic interface filter is determined principle:
Wherein, for Ground leakage current, general for 0.15mA, for supply voltage, mains switch frequency;
Determine when Y capacitance, the X capacitor design of inductance and electromagnetic interface filter is as follows:
Rule of thumb formula, the value of common mode choke inductance and EMI inductance:
In electrical source of power filter circuit:
The selection of power resistor is selected according to the maximum of busbar voltage;
According to concrete switching frequency and relevant electromagnetic compatibility standard, determine the cut-off frequency of common and different mode signal, in the time of the cut-off frequency of known common and different mode signal, the calculating principle of X electric capacity and Y electric capacity is as follows:
In above formula, for the stray inductance of loop of power circuit, its concrete value is determined according to simulation of power electronic and actual power loop structure.
In CAN communication bus filter circuit:
The selection principle of TVS pipe: specified instantaneous peak value pulse current , maximum clamp voltage value , the expression formula of transient pulse power is: ; In feed-through capacitor and pi type filter network LC parameter really establish a capital be adopt empirical value.
The invention has the beneficial effects as follows:
1, will control power supply, electrical source of power and CAN communication bus filter design in different ways, effectively raise the Electromagnetic Compatibility of each functional unit;
2, adopt the combination of TVS pipe and piezo-resistance, due to voltage spikes can be consumed in absorbing, improve the reliability of filtering device;
3, add filter circuit in electrical source of power, effectively suppress due to voltage spikes rear class power device is caused damage, the reliability of power device is improved, can effectively suppress the conduction interference that loop of power circuit is introduced forceful electric power power supply simultaneously;
4, add power resistor leakage path at loop of power circuit, ensure that controller is in the time of power-off, residue forceful electric power is released fast, ensures safety and the personal safety of major loop;
5, used a small amount of electronic device and simple circuit structure, electromagnetic compatibility scheme is simple, reliability is high, and cost is low.
Brief description of the drawings
Fig. 1 is the schematic diagram of filter circuit of the present invention
Fig. 2 is the schematic diagram of control electric source filter circuit of the present invention
Fig. 3 is the schematic diagram of electrical source of power filter circuit of the present invention
Fig. 4 is the schematic diagram of CAN bus filter circuit of the present invention.
Embodiment
As shown in Figure 1, motor drive controller is for the pure electric bus of city bus.Rated power of automobile controller control is 100kW, the AC induction motor that peak power is 250kW.Wherein, control supply voltage is 24V, and electrical source of power voltage is 576V, in the CAN bus on CAN communication bus access car, for communicating with entire car controller;
As shown in Figure 2, control in electric source filter circuit, that TVS pipe is selected is the withstand voltage bipolarity TVS pipe SA30CA of 30V, adopt 4 piezo-resistance 20K560, rear series connection in parallel is between two connected across power positive cathode, and X electric capacity is selected X1 electric capacity, model is CTX155K300VP275,1.5uf/300VAC, the inductance value of common mode choke is 1mH, the model of electromagnetic interface filter is JDNF210A1.
As shown in Figure 3, in electrical source of power filter circuit, leakage path is connected in electrical source of power both positive and negative polarity after selecting the power resistor of 2 3K/30W to connect, the specification of X electric capacity is X2/275VAC/2.2uf ± 10%, two parallel connections, as shown in the figure, specification is B32021A3102M to the connected mode of Y electric capacity.
As shown in Figure 4, in CAN communication bus filter circuit, that TVS pipe is selected is the withstand voltage bipolarity TVS pipe SA18CA of 18V, and feedthrough capacitor model is NFM21PC105B1C3D, and in pi type filter network, inductance value is 10uH, and electric capacity is 33pF.

Claims (9)

1. a filter circuit for electric motor car Induction Motor-Driven controller, is characterized in that comprising:
Control electric source filter circuit, the input of one end access control power supply, the other end is connected to the power input interface of control circuit, described control electric source filter circuit is processed rear access control circuit for the light current power supply of input being carried out to filtering, can suppress the peak voltage of light current power supply, filtering burr and noise, electrostatic protection, and inhibitory control circuit conduction interference that input power is brought;
Electrical source of power filter circuit, the input in electrical source of power is accessed in one end, the other end is connected to the electrical source of power input of loop of power circuit, and described electrical source of power filter circuit is used for suppressing power input power peak voltage, suppresses the interference that loop of power circuit is introduced power input power simultaneously;
CAN communication bus filter circuit, outside CAN bus is accessed in one end, and the other end is connected with control circuit by CAN interface, and described CAN communication bus filter circuit is for carrying out filtering and electrostatic protection to the high-frequency electromagnetic noise of signal of communication.
2. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, is characterized in that: described control electric source filter circuit comprises TVS pipe, piezo-resistance, X electric capacity, common mode choke and electromagnetic interface filter; Described X electric capacity, common mode choke and electromagnetic interface filter combination realize the inhibition to common-mode signal and difference mode signal, and it is expressed as by frequency:
Common-mode signal is by frequency:
Difference mode signal is by frequency:
In above-mentioned formula, for the inductance value of common mode choke, for the inductance value of electromagnetic interface filter, for the X capacitance of electromagnetic interface filter, for the Y capacitance of electromagnetic interface filter, for the capacitance of X electric capacity.
3. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, it is characterized in that: control after power supply access control electric source filter circuit, TVS pipe, piezo-resistance and X electric capacity are all connected across the both positive and negative polarity of controlling power supply input successively, then access the input side of common mode choke, the input side of the outlet side access electromagnetic interface filter of common mode choke, the power port of last access control circuit.
4. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, it is characterized in that: described electrical source of power filter circuit comprises power resistor, X electric capacity and Y electric capacity, after electrical source of power access, cross-over connection power resistor, the power resistor of cross-over connection plays the effect of bleeder resistance, can be fast by remaining forceful electric power consumption with controller after ensureing power-off, X electric capacity is connected across the positive and negative end of forceful electric power, one end of Y electric capacity is connected with negative pole respectively at anodal, another termination controller casing of Y electric capacity; X electric capacity and Y electric capacity, except absorbing the function of peak voltage, have simultaneously and suppress the interference that major loop is introduced electrical source of power, and the principle of its inhibition shows as:
Common-mode signal is by frequency:
Difference mode signal is by frequency:
In above-mentioned formula, for the stray inductance of loop of power circuit, for the capacitance of X electric capacity, with for the capacitance of selected Y electric capacity.
5. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, is characterized in that: described CAN communication bus filter circuit comprises TVS pipe, feed-through capacitor and pi type filter; Described pi type filter refers to π type LC type filter network, and its cut-off frequency is:
The two ends cross-over connection TVS pipe of outside CAN bus, then feed-through capacitor is accessed respectively at the two ends of CAN bus, then connects pi type filter, and pi type filter is connected to the bus incoming end of control circuit; The casing of the ground termination controller of described feed-through capacitor.
6. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, is characterized in that: in control electric source filter circuit:
The selection principle of TVS pipe: specified instantaneous peak value pulse current , maximum clamp voltage value , transient pulse power ;
The type selecting of piezo-resistance is mainly carried out type selecting according to its pressure sensitive voltage and power;
According to concrete applied environment and relevant electromagnetic compatibility standard, determine the cut-off frequency of common-mode signal and difference mode signal, in the time of the cut-off frequency of known common-mode signal and difference mode signal, X electric capacity is rule of thumb selected, and selects different X capacity types according to different voltage;
The inner Y electric capacity of electromagnetic interface filter is determined principle:
Wherein, for Ground leakage current, general for 0.15mA, for supply voltage, mains switch frequency;
Determine when Y capacitance, the X capacitor design of inductance and electromagnetic interface filter is as follows:
Rule of thumb formula, the value of common mode choke inductance and EMI inductance: .
7. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, is characterized in that: in electrical source of power filter circuit:
The selection of power resistor is selected according to the maximum of busbar voltage;
According to concrete switching frequency and relevant electromagnetic compatibility standard, determine the cut-off frequency of common and different mode signal, in the time of the cut-off frequency of known common and different mode signal, the calculating principle of X electric capacity and Y electric capacity is as follows:
In above formula, for the stray inductance of loop of power circuit, its concrete value is determined according to simulation of power electronic and actual power loop structure.
8. the filter circuit of a kind of electric motor car Induction Motor-Driven controller according to claim 1, is characterized in that: in CAN communication bus filter circuit:
The selection principle of TVS pipe: specified instantaneous peak value pulse current , maximum clamp voltage value , the expression formula of transient pulse power is: ; In feed-through capacitor and pi type filter network LC parameter really establish a capital be adopt empirical value.
9. the filtering method corresponding with the filter circuit of a kind of electric motor car Induction Motor-Driven controller described in any one in claim 1-8, is characterized in that:
Control after power supply access control electric source filter circuit, TVS pipe is for absorbing the energy of due to voltage spikes, static discharge, burst of pulses and surge voltage, ensure that late-class circuit is not affected, the leakage path of the energy that piezo-resistance absorbs as TVS pipe, then control power supply and be linked into the circuit being formed by X electric capacity, common mode choke and electromagnetic interface filter, by this circuit, the control power supply of input is carried out to filtering, prevent the conduction interference of control circuit simultaneously;
After electrical source of power access electrical source of power filter circuit, the positive and negative end cross-over connection power resistor of electrical source of power and X electric capacity; When after controller power-off, power resistor is for the remaining forceful electric power of releasing fast, and X electric capacity, for absorbing the peak voltage that electrical source of power input is brought, is protected the safety of rear class power device; Meanwhile, the conduction interference that the combinational circuit of X electric capacity and Y electric capacity is introduced to electrical source of power for suppressing loop of power circuit;
After outside CAN bus access CAN communication bus filter circuit, the TVS pipe of cross-over connection is for the protection of static, and the feed-through capacitor of access is used for suppressing high-frequency electromagnetic noise, and the pi type filter of access is for suppressing the coupling electromagnetic interference on CAN communication bus.
CN201410365068.XA 2014-07-29 2014-07-29 Filter circuit of an asynchronous motor drive controller of an electric vehicle and method thereof Pending CN104135142A (en)

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CN104377939A (en) * 2014-12-04 2015-02-25 安徽巨一自动化装备有限公司 Control power input isolation circuit for electric automobile
CN106685031A (en) * 2017-02-24 2017-05-17 国网上海市电力公司 Power input protection rectifying circuit of mobile power bank battery management system
CN107005499A (en) * 2014-11-14 2017-08-01 株式会社自动网络技术研究所 Communication system and communicator
CN107332434A (en) * 2017-07-14 2017-11-07 电子科技大学 A kind of motor driven systems common mode current suppression circuit
CN108111012A (en) * 2017-12-14 2018-06-01 北京卫星制造厂 A kind of high-power power supply and high-voltage motor drive module match circuit
CN109617391A (en) * 2018-12-25 2019-04-12 西安理工大学 The switch power supply EMI filter and its design method of stepless controllable rejection ability
CN112600180A (en) * 2020-12-04 2021-04-02 国网江苏省电力有限公司常州供电分公司 Transient disturbance suppression circuit and parameter selection method thereof
CN113580950A (en) * 2021-06-18 2021-11-02 东风汽车集团股份有限公司 Motor control system and vehicle
CN116156860A (en) * 2023-02-22 2023-05-23 北京航天发射技术研究所 Electromagnetic compatibility optimization method for synchronous servo controller of electrically-driven special vehicle

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CN107005499B (en) * 2014-11-14 2020-07-17 株式会社自动网络技术研究所 Communication system
CN107005499A (en) * 2014-11-14 2017-08-01 株式会社自动网络技术研究所 Communication system and communicator
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CN106685031A (en) * 2017-02-24 2017-05-17 国网上海市电力公司 Power input protection rectifying circuit of mobile power bank battery management system
CN106685031B (en) * 2017-02-24 2023-07-07 国网上海市电力公司 Power input protection rectifying circuit of mobile precious battery management system charges
CN107332434A (en) * 2017-07-14 2017-11-07 电子科技大学 A kind of motor driven systems common mode current suppression circuit
CN108111012A (en) * 2017-12-14 2018-06-01 北京卫星制造厂 A kind of high-power power supply and high-voltage motor drive module match circuit
CN109617391A (en) * 2018-12-25 2019-04-12 西安理工大学 The switch power supply EMI filter and its design method of stepless controllable rejection ability
CN112600180A (en) * 2020-12-04 2021-04-02 国网江苏省电力有限公司常州供电分公司 Transient disturbance suppression circuit and parameter selection method thereof
CN112600180B (en) * 2020-12-04 2022-08-30 国网江苏省电力有限公司常州供电分公司 Transient disturbance suppression circuit and parameter selection method thereof
CN113580950A (en) * 2021-06-18 2021-11-02 东风汽车集团股份有限公司 Motor control system and vehicle
CN113580950B (en) * 2021-06-18 2023-12-19 东风汽车集团股份有限公司 Motor control system and vehicle
CN116156860A (en) * 2023-02-22 2023-05-23 北京航天发射技术研究所 Electromagnetic compatibility optimization method for synchronous servo controller of electrically-driven special vehicle
CN116156860B (en) * 2023-02-22 2024-03-08 北京航天发射技术研究所 Electromagnetic compatibility optimization method for synchronous servo controller of electrically-driven special vehicle

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