CN104124864B - A kind of controller electromagnetic interference suppressing method of automobile motor - Google Patents
A kind of controller electromagnetic interference suppressing method of automobile motor Download PDFInfo
- Publication number
- CN104124864B CN104124864B CN201410381704.8A CN201410381704A CN104124864B CN 104124864 B CN104124864 B CN 104124864B CN 201410381704 A CN201410381704 A CN 201410381704A CN 104124864 B CN104124864 B CN 104124864B
- Authority
- CN
- China
- Prior art keywords
- automobile motor
- inductance
- capacitance
- electromagnetic interference
- power supply
- 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.)
- Active
Links
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to automobile motor field more particularly to a kind of controller electromagnetic interference suppressing methods of automobile motor, including：The embedded magnetoresistance material in the automobile motor notch, so that automobile motor is in weak magnetic state；Increase decoupling capacitor between the power supply and ground of each integrated circuit of controller, electrolytic capacitor is bridged in power input；The state for making switch carry out switching device in no-voltage, zero current using soft switch technique is converted；The current waveform of the power supply is corrected, current harmonic content is reduced, reduces the external electromagnetic interference of power supply, the present invention is by the way that magnetoresistance material to be fixed in automobile motor notch, and by PCB layout design and controller design, effectively inhibit the electromagnetic interference of the controller of automobile motor.
Description
Technical field
The present invention relates to automobile motor field more particularly to a kind of controller electromagnetic interference suppressing methods of automobile motor.
Background technology
In existing vehicle operation, EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) exists seriously
Exceeded phenomenon, many vehicle factors, due to scale is smaller, production capacity is limited, and technological development is seriously short of with technological reserve, is had no
EMC related notions will have the EMC seriously affected to disregard people's health, once there is testing requirement, it is general using electricity
Cable cladding plus the modes such as magnetic bead, magnet ring are coped with temporarily, meanwhile, which is expensive, common laborer's operating difficulties and does not allow
Easily grasp.
The electromagnetic interference source of BLDC (Brushless Direct Current Motor, brshless DC motor) control system
Include mainly：The interference and click inductive load that power supply system interference, high-frequency device for power switching quick on-off are formed are made
At forceful electric power interference；The route of transmission of electromagnetic interference refers mainly to the coupling that electromagnetic interference signal is traveled to sensitive equipment by interference source
Process.
In the prior art, brshless DC motor common used PWM controls：PWM frequency controls the switching frequency of three-phase bridge, duty
Than flowing through the effective current of machine winding to control and controlling motor speed, after tested, PWM switching frequencies are 20KHz, interference letter
Number frequency range concentrate on 0.15KHz-5MHz, just just have PWM working frequencies in this range, meanwhile, existing PWM is brushless
The design of this road of the motor of direct current generator is rich magnetic state, and when design of electrical motor, the magnetic circuit being excessively saturated will produce larger electromagnetic interference.
Invention content
It is an object of the invention to propose a kind of controller electromagnetic interference suppressing method of automobile motor, can inhibit automobile-used
The electromagnetic interference of the controller of motor.
For this purpose, the present invention uses following technical scheme：
A kind of controller electromagnetic interference suppressing method of automobile motor, including：
Step a, the embedded magnetoresistance material in the automobile motor notch, so that automobile motor is in weak magnetic state；
Step b, increase decoupling capacitor between the power supply and ground of each integrated circuit of controller, power input across
Connect electrolytic capacitor；
Step c, the state for making switch carry out switching device in no-voltage, zero current using soft switch technique is converted；
Step d, the current waveform of the power supply is corrected, reduces current harmonic content, reduces the external electrical of power supply
Magnetic disturbance.
Wherein, further include：
Step e, the motor gas-gap of the automobile motor is set to 0.8mm.
Wherein, the magnetoresistance material makes the magnetic conductivity of the automobile motor be between 0.7-0.8.
Wherein, the capacitance of the decoupling capacitor is calculated according to C=1/f, wherein f is the frequency of electromagnetic wave, the electricity
The capacitance of capacitance is solved between 10 μ F-100 μ F.
Wherein, the step b further includes：By adjusting the decoupling capacitor, electrolytic capacitor and with the decoupling capacitor, electricity
The position for the component that solution capacitance is connected, shortens the lead of the decoupling capacitor and electrolytic capacitor.
Wherein, the current waveform of the power supply is corrected specially in the step d：Using PFC skill
Art makes the current waveform of power supply follow voltage waveform, and current waveform is corrected into approximate sine wave.
Wherein, the external electromagnetic interference includes：Common mode noise, differential mode noise and external circuit interference.
Wherein, the suppression circuit of the common mode noise includes：Inductance L1, inductance L2, capacitance C1, capacitance C2 and resistance R1,
Wherein, one end of the power supply is connect with one end of inductance L1, the other end of inductance L1 and one end of capacitance C1 and resistance R1's
One end links together, and the other end of the power supply is connect with one end of inductance L2, the other end of inductance L2 and the one of capacitance C2
The other end of end and resistance R1 link together, and the other end of capacitance C1 is grounded together with the other end of capacitance C2.
Wherein, the suppression circuit of the differential mode noise includes：Inductance L3, inductance L4, capacitance C3 and resistance R2, wherein institute
The one end for stating power supply is connect with one end of inductance L3, and the other end of inductance L3 is connect with one end of one end of capacitance C3 and resistance R2
Together, the other end of the power supply is connect with one end of inductance L4, the other end of inductance L4 and the other end and electricity of capacitance C3
The other end of resistance R2 links together.
Beneficial effects of the present invention are：A kind of controller electromagnetic interference suppressing method of automobile motor, including：In the vehicle
With magnetoresistance material is embedded in motor slot, so that automobile motor is in weak magnetic state；In the electricity of each integrated circuit of controller
Increase decoupling capacitor between source and ground, electrolytic capacitor is bridged in power input；Using soft switch technique make switch no-voltage,
The state conversion of switching device is carried out when zero current；The current waveform of the power supply is corrected, current harmonic content is reduced,
The external electromagnetic interference of power supply is reduced, the present invention passes through PCB layout by the way that magnetoresistance material to be fixed in automobile motor notch
Design and controller design, effectively inhibit the electromagnetic interference of the controller of automobile motor.
Description of the drawings
Fig. 1 is a kind of controller electromagnetic interference suppressing method flow for automobile motor that the specific embodiment of the invention provides
Figure.
Fig. 2 is the motor slot scheme of installation that the specific embodiment of the invention provides.
Fig. 3 is the suppression circuit figure for the common mode noise that the specific embodiment of the invention provides.
Fig. 4 is the suppression circuit figure for the differential mode noise that the specific embodiment of the invention provides.
Specific implementation mode
With reference to Fig. 1-Fig. 4 and the technical solution that is further illustrated the present invention by specific implementation mode.
Fig. 1 is a kind of controller electromagnetic interference suppressing method flow for automobile motor that the specific embodiment of the invention provides
Figure.
A kind of controller electromagnetic interference suppressing method of automobile motor, including：
Step a, the embedded magnetoresistance material in the automobile motor notch, so that automobile motor is in weak magnetic state；
Step b, increase decoupling capacitor between the power supply and ground of each integrated circuit of controller, power input across
Connect electrolytic capacitor；
Step c, the state for making switch carry out switching device in no-voltage, zero current using soft switch technique is converted；
Step d, the current waveform of the power supply is corrected, reduces current harmonic content, reduces the external electrical of power supply
Magnetic disturbance.
In the present embodiment, further include：
Step e, the motor gas-gap of the automobile motor is set to 0.8mm, motor gas-gap increases accordingly, and electricity can be improved
The efficiency of machine, but nor being the bigger the better, in the present embodiment, motor gas-gap is set as the 0.5mm effects of 0.8mm than in the prior art
Fruit is more preferable, can also inhibit its electromagnetic interference while improving electric efficiency.
In the present embodiment, it by the way that magnetoresistance material to be fixed in automobile motor notch, and designs and controls by PCB layout
Device design processed, effectively inhibits the electromagnetic interference of the controller of automobile motor.
As shown in Fig. 2, being motor slot scheme of installation provided in this embodiment, in the prior art, at motor slot
Wooden or bamboo matter insert material is installed, essence is consistent with air in magnetic circuit, magnetic conductivity Kr=Lq/Ld=1, in this reality
It applies in example, magnetoresistance material is installed at the motor slot, the magnetoresistance material makes the magnetic conductivity of the automobile motor be in
Between 0.7-0.8, so that automobile motor is in weak magnetic state, cut off the route of transmission of electromagnetic interference, realized electromagnetic interference.
In the present embodiment, by taking surface-mount type outer rotor is the Design of PM Motor structure of permanent magnet as an example, stator electricity is utilized
The q axis components demagnetizing method of stream adjusts magnetic field, realizes the decoupling and control of motor stator and rotor field system, while control is encouraged
The amplitude and phase of magnetoelectricity stream, torque current are conducive to use weak magnetic control mode, make N, S of motor d, q axis and coordinate system weights
It closes, coil windings is made to form right angle at any time in cutting magnetic line, reach output torque maximum；It may be implemented truly
No Hall starts, and smooth starting can be really achieved motor is in half hill-start.
In the present embodiment, no Hall starts strategy, using fixed commutation frequency, increases and believes as the triggering of power device
Number pwm signal duty ratio simultaneously, detects terminal voltage signal：Position signal corresponding to the state is detected in each triggering state,
If continuous n times detect that corresponding position signal switches to automatic synchronization mode, to ensure that motor motor is smooth
Switching has and achieves good startup effect under good anti-interference, light-load conditions.
In the present embodiment, the capacitance of the decoupling capacitor is calculated according to C=1/f, wherein f is the frequency of electromagnetic wave
Rate, namely the wave frequency of interference is generated, if the frequency of electromagnetic wave is 10MHz, then decoupling capacitor takes 0.1 μ F, if electromagnetic wave
Frequency be 100MHz, then decoupling capacitor take 0.01 μ F, the capacitance of the electrolytic capacitor is between 10 μ F-100 μ F.
In the present embodiment, further include：In the ceramic disc capacitor of one 0.01 μ F of each ic core on piece parallel connection.
In the present embodiment, the step b further includes：It is gone by adjusting the decoupling capacitor, electrolytic capacitor and with described
The lead of the decoupling capacitor and electrolytic capacitor is shortened in the position for the component that coupling capacitance, electrolytic capacitor are connected.
In the present embodiment, the current waveform of the power supply is corrected specially in the step d：Using power because
Number alignment technique makes the current waveform of power supply follow voltage waveform, and current waveform is corrected into approximate sine wave.
In BLDC power supply circuits, voltage, current waveform are mostly the period wave close to rectangle, the high frequency letter of these waveforms
Very big interference number all is caused to the signal of BLDC control circuits, very high di/dt and dv/dt is generated in BLDC work, thus draws
The surge current and peak voltage risen forms interference source, and power supply circuit also generates motor load while by electromagnetic interference
Electromagnetic interference：Return to noise, output noise and radiation interference；Frequency be more than the radio frequency interference of 30MHz be by antenna model into
Row interference and coupling.
In the present embodiment, the coupling includes field coupling and Conduction coupling.
Conduction coupling is a kind of important crosstalk mode, it is very big to the interference of conducting wire and cable, capacitive couplings and electricity
Sense coupling is two kinds of forms of Conduction coupling, there is following several suppressing methods in the prior art, such as can be with for capacitive couplings
Using the length for reducing conducting wire, increase line spacing, balancing method carries out the mode such as shielding and inhibits to interference source and disturbed source
Interference, can reduce mutual inductance for inductive coupling, be partially formed coupling ring, carry out the mode such as shielding to interference source and inhibit.
In the present embodiment, the external electromagnetic interference includes：Common mode noise, differential mode noise and external circuit interference.
As shown in figure 3, in the present embodiment, the suppression circuit of the common mode noise includes：Inductance L1, inductance L2, capacitance
C1, capacitance C2 and resistance R1, wherein one end of the power supply is connect with one end of inductance L1, the other end and capacitance of inductance L1
One end of C1 and one end of resistance R1 link together, and the other end of the power supply is connect with one end of inductance L2, inductance L2's
The other end links together with one end of capacitance C2 and the other end of resistance R1, the other end of the other end and capacitance C2 of capacitance C1
It is grounded together.
As shown in figure 4, in the present embodiment, the suppression circuit of the differential mode noise includes：Inductance L3, inductance L4, capacitance
C3 and resistance R2, wherein one end of the power supply is connect with one end of inductance L3, one end of the other end and capacitance C3 of inductance L3
And one end of resistance R2 links together, the other end of the power supply is connect with one end of inductance L4, the other end of inductance L4 with
The other end of capacitance C3 and the other end of resistance R2 link together.
The foregoing is merely the specific implementation modes of the present invention, and the description is merely to explain the principles of the invention, and
It cannot be using any interpretation of structure as limiting the scope of the invention.Based on the explanation herein, those skilled in the art is not
Other specific implementation methods of the present invention can be associated by needing to pay performing creative labour, these structures fall within the present invention
Protection domain within.
Claims (8)
1. a kind of controller electromagnetic interference suppressing method of automobile motor, which is characterized in that including：
Step a, the embedded magnetoresistance material in the automobile motor notch, so that automobile motor is in weak magnetic state；
Wherein, the weak magnetic state is that the magnetic conductivity of the automobile motor is between 0.7-0.8；
Step b, increase decoupling capacitor between the power supply and ground of each integrated circuit of controller, electricity is bridged in power input
Solve capacitance；
Step c, the state for making switch carry out switching device in no-voltage, zero current using soft switch technique is converted；
Step d, the current waveform of the power supply is corrected, reduces current harmonic content, the external electromagnetic for reducing power supply is dry
It disturbs.
2. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 1, which is characterized in that also wrap
It includes：
Step e, the motor gas-gap of the automobile motor is set to 0.8mm.
3. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 1, which is characterized in that described
The capacitance of decoupling capacitor is calculated according to C=1/f, wherein f is the frequency of electromagnetic wave, and the capacitance of the electrolytic capacitor is 10
Between μ F-100 μ F.
4. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 3, which is characterized in that described
Step b further includes：By adjusting the decoupling capacitor, electrolytic capacitor and the member being connected with the decoupling capacitor, electrolytic capacitor
The lead of the decoupling capacitor and electrolytic capacitor is shortened in the position of device.
5. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 1, which is characterized in that described
The current waveform of the power supply is corrected specially in step d：Make the current wave of power supply using power factor correction technology
Shape follows voltage waveform, and current waveform is corrected into approximate sine wave.
6. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 1, which is characterized in that described
External electromagnetic interference includes：Common mode noise, differential mode noise and external circuit interference.
7. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 6, which is characterized in that described
The suppression circuit of common mode noise includes：Inductance L1, inductance L2, capacitance C1, capacitance C2 and resistance R1, wherein the one of the power supply
End is connect with one end of inductance L1, and the other end of inductance L1 and one end of one end of capacitance C1 and resistance R1 link together, institute
The other end for stating power supply is connect with one end of inductance L2, the other end of inductance L2 and one end of capacitance C2 and the other end of resistance R1
It links together, the other end of capacitance C1 is grounded together with the other end of capacitance C2.
8. a kind of controller electromagnetic interference suppressing method of automobile motor according to claim 6, which is characterized in that described
The suppression circuit of differential mode noise includes：Inductance L3, inductance L4, capacitance C3 and resistance R2, wherein one end of the power supply and inductance
One end of L3 connects, and the other end of inductance L3 and one end of one end of capacitance C3 and resistance R2 link together, the power supply
The other end is connect with one end of inductance L4, and the other end of inductance L4 and the other end of the other end of capacitance C3 and resistance R2 are connected to
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381704.8A CN104124864B (en) | 2014-08-05 | 2014-08-05 | A kind of controller electromagnetic interference suppressing method of automobile motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381704.8A CN104124864B (en) | 2014-08-05 | 2014-08-05 | A kind of controller electromagnetic interference suppressing method of automobile motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104124864A CN104124864A (en) | 2014-10-29 |
| CN104124864B true CN104124864B (en) | 2018-08-24 |
Family
ID=51770164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410381704.8A Active CN104124864B (en) | 2014-08-05 | 2014-08-05 | A kind of controller electromagnetic interference suppressing method of automobile motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104124864B (en) |
Citations (3)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150111469A (en) * | 2014-03-25 | 2015-10-06 | (주)엘지하우시스 | Electromagnetic wave shielding sheet, and the preparation method for the same |
-
2014
- 2014-08-05 CN CN201410381704.8A patent/CN104124864B/en active Active
Patent Citations (3)
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 无刷直流电机供电系统的电磁干扰分析及抑制;李一鸣;《船电技术》;20100228;第30卷(第2期);第22-24页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104124864A (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103222175B (en) | Power converting apparatus | |
| US8917042B2 (en) | Methods and systems for reducing conducted electromagnetic interference | |
| US20150123402A1 (en) | Magnetic structure combining normal mode and common mode inductance | |
| CN104270002B (en) | Passive suppression method for conducted electromagnetic interface of PWM (power width modulation) power converter | |
| CN204316327U (en) | A kind of electromagnetic interface filter for dual feedback wind power generation system | |
| CN104135142A (en) | Filter circuit of an asynchronous motor drive controller of an electric vehicle and method thereof | |
| Yongxiang et al. | Periodic carrier frequency modulation in reducing low-frequency electromagnetic interference of permanent magnet synchronous motor drive system | |
| CN203039574U (en) | Power supply circuit capable of solving problem of grounding system common-mode lightning stroke restart | |
| Maislinger et al. | Efficiency and motor-performance improvement using WBG-inverters with observer-based actively damped LC-sine wave filters | |
| CN201639300U (en) | DC (direct current) frequency-conversion dishwasher and filter circuit thereof | |
| CN101610027B (en) | Electromagnetic interference suppression circuit for correcting power factor | |
| CN209345009U (en) | A kind of the stand-by motor control device and system of high electrical-magnetic compatibility energy | |
| CN103973134A (en) | Direct-current power device and PWM (pulse width modulation) pulse control method for improving power factor thereof | |
| CN104124864B (en) | A kind of controller electromagnetic interference suppressing method of automobile motor | |
| CN103592511B (en) | A kind of circuit detecting ac power frequency | |
| CN2794029Y (en) | Frequency transformer of active low-throughout filter with common-mode voltage elimination | |
| CN209516921U (en) | The common-mode interference suppression circuit of air-conditioning | |
| CN103731015B (en) | Inhibit the current feedback active power filter of frequency conversion speed-adjusting system common-mode voltage | |
| Guo et al. | Systematic analysis of conducted electromagnetic interferences for the electric drive system in electric vehicles | |
| CN206323142U (en) | A kind of zero harmonic wave disturbs the heating control circuit of variable power | |
| US9887636B2 (en) | Method of reducing common mode current | |
| CN202395667U (en) | Switch power supply circuit with small voltage output ripple | |
| CN204361685U (en) | Wind turbine generator pusher side filter | |
| CN202261012U (en) | EMI (Electro-Magnetic Interference) filter for industrial frequency converter | |
| CN209419480U (en) | A kind of circuit and motor inhibiting discrete device interference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |