CN104124864A - Electromagnetic interference suppression method for controller of vehicle electrical motor - Google Patents
Electromagnetic interference suppression method for controller of vehicle electrical motor Download PDFInfo
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- CN104124864A CN104124864A CN201410381704.8A CN201410381704A CN104124864A CN 104124864 A CN104124864 A CN 104124864A CN 201410381704 A CN201410381704 A CN 201410381704A CN 104124864 A CN104124864 A CN 104124864A
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Abstract
The invention relates to the field of vehicle electrical motors, in particular to an electromagnetic interference suppression method for a controller of a vehicle electrical motor. The electromagnetic interference suppression method comprises the following steps: embedding magnetic resistance materials in a notch of the vehicle electrical motor so that the vehicle electrical motor is at a flux weakening state; increasing a decoupling capacitor between the power supply of each integrated circuit of a controller and the ground, and bridging an electrolytic capacitor at the input end of the power supply; applying a soft-switching technology so as to carry out the status switching of a switching element during zero voltage and zero current of a switch; correcting the current waveform of the power supply so as to reduce the content of current harmonics and reduce the external electromagnetic interference of the power supply. The magnetic resistance materials are fixed in the notch of the vehicle electrical motor, and through the PCB (Printed Circuit Board) wiring design and the controller design, the electromagnetic interference of the controller of the vehicle electrical motor is effectively inhibited.
Description
Technical field
The present invention relates to automobile motor field, relate in particular to a kind of controller electromagnetic interference inhibition method of automobile motor.
Background technology
Existing car load is in service, EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) there is severe overweight phenomenon, much car load factories, because scale is less, production capacity is limited, technological development and technological reserve are seriously short of, has no EMC related notion, by having the EMC having a strong impact on to disregard to people are healthy, once there be testing requirement, general employing cable is coated, adds the mode such as magnetic bead, magnet ring and tackles temporarily, meanwhile, which cost costliness, common laborer's operating difficulties and be not easy grasp.
The electromagnetic interference source of BLDC (Brushless Direct Current Motor, brshless DC motor) control system mainly comprises: the forceful electric power that the interference that electric power system is disturbed, the quick break-make of high-frequency device for power switching forms and click inductive load cause disturbs; The route of transmission of electromagnetic interference mainly refers to that electromagnetic interference signal is propagated into the coupling process of sensitive equipment by interference source.
In prior art, brshless DC motor common used PWM control: PWM frequency is controlled the switching frequency of three-phase bridge, duty is recently controlled the effective current of the motor winding of flowing through and is controlled motor speed, after tested, PWM switching frequency is 20KHz, the frequency range of interference signal concentrates on 0.15KHz-5MHz, in this scope, just in time just there is PWM operating frequency, simultaneously, this road design of the motor of existing PWM brshless DC motor is rich magnetic state, when design of electrical motor, too saturated magnetic circuit can produce larger electromagnetic interference.
Summary of the invention
The object of the invention is to propose a kind of controller electromagnetic interference inhibition method of automobile motor, can suppress the electromagnetic interference of the controller of automobile motor.
For reaching this object, the present invention by the following technical solutions:
A kind of controller electromagnetic interference inhibition method of automobile motor, comprising:
Step a, in described automobile motor notch, embed magnetoresistance material, so that automobile motor is in weak magnetic state;
Step b, between the VDD-to-VSS of each integrated circuit of controller, increase decoupling capacitor, at power input cross-over connection electrochemical capacitor;
Step c, application soft switch technique make switch in the time of no-voltage, zero current, carry out the state conversion of switching device;
Steps d, the current waveform of described power supply is proofreaied and correct, reduced current harmonic content, reduce the external electromagnetic interference of power supply.
Wherein, also comprise:
The motor gas-gap of step e, described automobile motor is set to 0.8mm.
Wherein, described magnetoresistance material makes the magnetic permeability of described automobile motor between 0.7-0.8.
Wherein, the capacitance of described decoupling capacitor calculates according to C=1/f, and wherein, f is electromagnetic frequency, and the capacitance of described electrochemical capacitor is between 10 μ F-100 μ F.
Wherein, described step b also comprises: the position of the components and parts by adjusting described decoupling capacitor, electrochemical capacitor and be connected with described decoupling capacitor, electrochemical capacitor, shorten the lead-in wire of described decoupling capacitor and electrochemical capacitor.
Wherein, in described steps d, the current waveform of described power supply is proofreaied and correct and is specially: adopt power factor correction technology to make the current waveform of power supply follow voltage waveform, current waveform is corrected into approximate sine wave.
Wherein, described external electromagnetic interference comprises: common mode noise, differential mode noise and external circuit disturb.
Wherein, the inhibition circuit of described common mode noise comprises: inductance L 1, inductance L 2, capacitor C 1, capacitor C 2 and resistance R 1, wherein, one end of described power supply is connected with one end of inductance L 1, one end of one end of the other end of inductance L 1 and capacitor C 1 and resistance R 1 links together, the other end of described power supply is connected with one end of inductance L 2, and one end of the other end of inductance L 2 and capacitor C 2 and the other end of resistance R 1 link together, ground connection together with the other end of the other end of capacitor C 1 and capacitor C 2.
Wherein, the inhibition circuit of described differential mode noise comprises: inductance L 3, inductance L 4, capacitor C 3 and resistance R 2, wherein, one end of described power supply is connected with one end of inductance L 3, one end of one end of the other end of inductance L 3 and capacitor C 3 and resistance R 2 links together, the other end of described power supply is connected with one end of inductance L 4, and the other end of the other end of inductance L 4 and capacitor C 3 and the other end of resistance R 2 link together.
Beneficial effect of the present invention is: a kind of controller electromagnetic interference inhibition method of automobile motor, comprising: in described automobile motor notch, embed magnetoresistance material, so that automobile motor is in weak magnetic state; Between the VDD-to-VSS of each integrated circuit of controller, increase decoupling capacitor, at power input cross-over connection electrochemical capacitor; Application soft switch technique makes switch in the time of no-voltage, zero current, carry out the state conversion of switching device; Current waveform to described power supply is proofreaied and correct, reduce current harmonic content, reduce the external electromagnetic interference of power supply, the present invention is by being fixed to magnetoresistance material in automobile motor notch, and design and controller design by PCB layout, effectively suppress the electromagnetic interference of the controller of automobile motor.
Brief description of the drawings
Fig. 1 is that the controller electromagnetic interference of a kind of automobile motor of providing of the specific embodiment of the invention suppresses method flow diagram.
Fig. 2 is the motor slot scheme of installation that the specific embodiment of the invention provides.
Fig. 3 is the inhibition circuit diagram of the common mode noise that provides of the specific embodiment of the invention.
Fig. 4 is the inhibition circuit diagram of the differential mode noise that provides of the specific embodiment of the invention.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with Fig. 1-Fig. 4 and by embodiment.
Fig. 1 is that the controller electromagnetic interference of a kind of automobile motor of providing of the specific embodiment of the invention suppresses method flow diagram.
A kind of controller electromagnetic interference inhibition method of automobile motor, comprising:
Step a, in described automobile motor notch, embed magnetoresistance material, so that automobile motor is in weak magnetic state;
Step b, between the VDD-to-VSS of each integrated circuit of controller, increase decoupling capacitor, at power input cross-over connection electrochemical capacitor;
Step c, application soft switch technique make switch in the time of no-voltage, zero current, carry out the state conversion of switching device;
Steps d, the current waveform of described power supply is proofreaied and correct, reduced current harmonic content, reduce the external electromagnetic interference of power supply.
In the present embodiment, also comprise:
The motor gas-gap of step e, described automobile motor is set to 0.8mm, motor gas-gap increases accordingly, can improve the efficiency of motor, but neither be the bigger the better, in the present embodiment, motor gas-gap is set to 0.8mm than 0.5mm better effects if of the prior art, in improving electric efficiency, can also suppress its electromagnetic interference.
In the present embodiment, by magnetoresistance material is fixed in automobile motor notch, and design and controller design by PCB layout, effectively suppressed the electromagnetic interference of the controller of automobile motor.
As shown in Figure 2, be the motor slot scheme of installation that the present embodiment provides, in the prior art, motor slot place is provided with wooden or bamboo matter insert material, its essence is consistent with air in magnetic circuit, magnetic permeability is Kr=Lq/Ld=1, and in the present embodiment, described motor slot place is provided with magnetoresistance material, described magnetoresistance material makes the magnetic permeability of described automobile motor between 0.7-0.8, make automobile motor in weak magnetic state, cut off the route of transmission of electromagnetic interference, realized electromagnetic interference.
In the present embodiment, Design of PM Motor structure taking surface-mount type external rotor as permanent magnet is example, utilize the q axle component demagnetizing method of stator current to regulate magnetic field, realize decoupling zero and the control of motor stator and rotor field system, control amplitude and the phase place of exciting current, torque current simultaneously, be conducive to adopt weak magnetic control mode, motor d, q axle are overlapped with N, the S of coordinate system, make coil windings in the time of cutting magnetic line, form at any time right angle, reach output torque maximum; Can realize truly without Hall start, even if motor also can really reach smooth starting at half hill-start.
In the present embodiment, start strategy without Hall, adopt fixing commutation frequency, add the triggering signal pwm signal duty ratio of wonderful works power device simultaneously, test side voltage signal: detect this state institute correspondence position signal in each triggering state, as N continuous time detects that corresponding position signalling is just switched to automatic synchronization mode, thus ensured motor motor switch smoothly, have and under good anti-interference, light-load conditions, obtained good startup effect.
In the present embodiment, the capacitance of described decoupling capacitor calculates according to C=1/f, wherein, f is electromagnetic frequency, also produces the wave frequency disturbing, if electromagnetic frequency is 10MHz, decoupling capacitor is got 0.1 μ F, if electromagnetic frequency is 100MHz, decoupling capacitor is got 0.01 μ F, and the capacitance of described electrochemical capacitor is between 10 μ F-100 μ F.
In the present embodiment, also comprise: the ceramic disc capacitor of a 0.01 μ F in parallel in each integrated circuit (IC) chip.
In the present embodiment, described step b also comprises: the position of the components and parts by adjusting described decoupling capacitor, electrochemical capacitor and be connected with described decoupling capacitor, electrochemical capacitor, shorten the lead-in wire of described decoupling capacitor and electrochemical capacitor.
In the present embodiment, in described steps d, the current waveform of described power supply is proofreaied and correct and is specially: adopt power factor correction technology to make the current waveform of power supply follow voltage waveform, current waveform is corrected into approximate sine wave.
In BLDC power supply circuits, voltage, current waveform are mostly the periodic wave that approaches rectangle, the high-frequency signal of these waveforms all causes very large interference to the signal of BLDC control circuit, in BLDC work, produce very high di/dt and dv/dt, the surge current causing thus and peak voltage form interference source, and power supply circuits also produce electromagnetic interference to motor load in being subject to electromagnetic interference: return to noise, output noise and radiated interference; Frequency exceedes the radio frequency interference of 30MHz and carries out interference and coupling by antenna model.
In the present embodiment, described coupling comprises field coupled and conduction coupling.
Conduction coupling is a kind of important mode of crosstalking, it is very large to the interference of wire and cable, capacitive couplings and inductance coupling high are two kinds of forms of conduction coupling, have following several inhibition method, as can be adopted the length that reduces wire for capacitive couplings in prior art, increase distance between centers of tracks, balancing method, suppresses to disturb to modes such as interference source and disturbed source shield, can reduce mutual inductance for inductance coupling high, the local coupling loop that forms, suppresses modes such as interference source shield.
In the present embodiment, described external electromagnetic interference comprises: common mode noise, differential mode noise and external circuit disturb.
As shown in Figure 3, in the present embodiment, the inhibition circuit of described common mode noise comprises: inductance L 1, inductance L 2, capacitor C 1, capacitor C 2 and resistance R 1, wherein, one end of described power supply is connected with one end of inductance L 1, one end of one end of the other end of inductance L 1 and capacitor C 1 and resistance R 1 links together, the other end of described power supply is connected with one end of inductance L 2, the other end of one end of the other end of inductance L 2 and capacitor C 2 and resistance R 1 links together, ground connection together with the other end of the other end of capacitor C 1 and capacitor C 2.
As shown in Figure 4, in the present embodiment, the inhibition circuit of described differential mode noise comprises: inductance L 3, inductance L 4, capacitor C 3 and resistance R 2, wherein, one end of described power supply is connected with one end of inductance L 3, one end of one end of the other end of inductance L 3 and capacitor C 3 and resistance R 2 links together, and the other end of described power supply is connected with one end of inductance L 4, and the other end of the other end of inductance L 4 and capacitor C 3 and the other end of resistance R 2 link together.
The foregoing is only the specific embodiment of the present invention, these are described is in order to explain principle of the present invention, and can not be taking any interpretation of structure as limiting the scope of the invention.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other specific implementation method of the present invention, within these structures all will fall into protection scope of the present invention.
Claims (9)
1. the controller electromagnetic interference inhibition method of an automobile motor, is characterized in that, comprising:
Step a, in described automobile motor notch, embed magnetoresistance material, so that automobile motor is in weak magnetic state;
Step b, between the VDD-to-VSS of each integrated circuit of controller, increase decoupling capacitor, at power input cross-over connection electrochemical capacitor;
Step c, application soft switch technique make switch in the time of no-voltage, zero current, carry out the state conversion of switching device;
Steps d, the current waveform of described power supply is proofreaied and correct, reduced current harmonic content, reduce the external electromagnetic interference of power supply.
2. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 1, is characterized in that, also comprises:
The motor gas-gap of step e, described automobile motor is set to 0.8mm.
3. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 1, is characterized in that, described magnetoresistance material makes the magnetic permeability of described automobile motor between 0.7-0.8.
4. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 1, it is characterized in that, the capacitance of described decoupling capacitor calculates according to C=1/f, wherein, f is electromagnetic frequency, and the capacitance of described electrochemical capacitor is between 10 μ F-100 μ F.
5. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 4, it is characterized in that, described step b also comprises: the position of the components and parts by adjusting described decoupling capacitor, electrochemical capacitor and be connected with described decoupling capacitor, electrochemical capacitor, shorten the lead-in wire of described decoupling capacitor and electrochemical capacitor.
6. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 1, it is characterized in that, in described steps d, the current waveform of described power supply is proofreaied and correct and is specially: adopt power factor correction technology to make the current waveform of power supply follow voltage waveform, current waveform is corrected into approximate sine wave.
7. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 1, is characterized in that, described external electromagnetic interference comprises: common mode noise, differential mode noise and external circuit disturb.
8. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 7, it is characterized in that, the inhibition circuit of described common mode noise comprises: inductance L 1, inductance L 2, capacitor C 1, capacitor C 2 and resistance R 1, wherein, one end of described power supply is connected with one end of inductance L 1, one end of one end of the other end of inductance L 1 and capacitor C 1 and resistance R 1 links together, the other end of described power supply is connected with one end of inductance L 2, the other end of one end of the other end of inductance L 2 and capacitor C 2 and resistance R 1 links together, ground connection together with the other end of the other end of capacitor C 1 and capacitor C 2.
9. the controller electromagnetic interference inhibition method of a kind of automobile motor according to claim 7, it is characterized in that, the inhibition circuit of described differential mode noise comprises: inductance L 3, inductance L 4, capacitor C 3 and resistance R 2, wherein, one end of described power supply is connected with one end of inductance L 3, one end of one end of the other end of inductance L 3 and capacitor C 3 and resistance R 2 links together, the other end of described power supply is connected with one end of inductance L 4, and the other end of the other end of inductance L 4 and capacitor C 3 and the other end of resistance R 2 link together.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410381704.8A CN104124864B (en) | 2014-08-05 | 2014-08-05 | A kind of controller electromagnetic interference suppressing method of automobile motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410381704.8A CN104124864B (en) | 2014-08-05 | 2014-08-05 | A kind of controller electromagnetic interference suppressing method of automobile motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184358A (en) * | 1996-12-04 | 1998-06-10 | 株式会社三协精机制作所 | Motor |
| CN103368377A (en) * | 2013-07-17 | 2013-10-23 | 华南理工大学 | Preceding-stage EMI filtering protective circuit of driving power source |
| CN104377844A (en) * | 2013-08-13 | 2015-02-25 | 博世电动工具（中国）有限公司 | Stator of motor and manufacturing method thereof |
| WO2015147449A1 (en) * | 2014-03-25 | 2015-10-01 | (주)엘지하우시스 | Electromagnetic wave shielding sheet and method for manufacturing same |
-
2014
- 2014-08-05 CN CN201410381704.8A patent/CN104124864B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184358A (en) * | 1996-12-04 | 1998-06-10 | 株式会社三协精机制作所 | Motor |
| CN103368377A (en) * | 2013-07-17 | 2013-10-23 | 华南理工大学 | Preceding-stage EMI filtering protective circuit of driving power source |
| CN104377844A (en) * | 2013-08-13 | 2015-02-25 | 博世电动工具（中国）有限公司 | Stator of motor and manufacturing method thereof |
| WO2015147449A1 (en) * | 2014-03-25 | 2015-10-01 | (주)엘지하우시스 | Electromagnetic wave shielding sheet and method for manufacturing same |
Non-Patent Citations (1)
| Title |
|---|
| 李一鸣: "无刷直流电机供电系统的电磁干扰分析及抑制", 《船电技术》 * |
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