CN109039215A - Inverter harmonic is to automobile permanent magnet synchronous motor vibration noise impact analysis method - Google Patents
Inverter harmonic is to automobile permanent magnet synchronous motor vibration noise impact analysis method Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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Abstract
The present invention relates to a kind of inverter harmonics to automobile permanent magnet synchronous motor vibration noise impact analysis method, analyzes automobile permanent magnet synchronous motor vibration noise inverter harmonic.Initially set up multiple physical field permanent magnet synchronous motor PMSM vibration noise analysis model, theory analysis the harmonic wave source of PMSM electromagnetic force wave characteristic parameter and each rank Reeb, characteristic parameter include Reeb order r, Reeb frequency frWith Reeb amplitude Peak‑r/fr, PMSM multiple physical field coupled vibration analysis finite element model is established, the electric current and electromagnetic force frequency spectrum of model machine under speed regulation by constant torque and weak-magnetic speed-regulating operating condition, vibration noise spectral characteristic when analyzing different current source supplies are calculated；Finally experiment is verified with theoretical and emulation.Analysis method of the present invention can be generalized to general integer slot multipole logarithm electric car PMSM, provide fundamental basis for the design of electric car low-vibration noise PMSM.
Description
Technical field
The present invention relates to a kind of permanent magnet synchronous motor vibration noise analytical technology, in particular to a kind of inverter harmonic is to vehicle
With permanent magnet synchronous motor vibration noise impact analysis method.
Background technique
Integer slot PMSM (permanent magnet synchronous motor Permanent Magnet Synchronous Motor) is due to its Gao Gong
The superperformances such as rate density, wide speed regulating range, high efficiency are widely used in electric car.However electromagnetism caused by inverter harmonic
Vibration noise can reduce electric car riding comfort and operational reliability.Therefore analysis inverter harmonic is synchronous to automobile permanent magnet
The influence of motor oscillating noise and guides the optimization design of motor electromagnetic or structure, to the comfortable reliable of raising electric car
Property and operation stability are of great significance.
Summary of the invention
The problem of deteriorating permanent magnet synchronous motor vibrating noise the present invention be directed to inverter harmonic, proposes a kind of inverter
Harmonic wave analyzes inverter harmonic and shakes to automobile permanent magnet synchronous motor to automobile permanent magnet synchronous motor vibration noise impact analysis method
The influence of moving noise, provides fundamental basis for designing permanent-magnet synchronous motor.
The technical solution of the present invention is as follows: a kind of inverter harmonic is to automobile permanent magnet synchronous motor vibration noise impact analysis side
Method specifically comprises the following steps:
1) the theory analysis harmonic wave source of permanent magnet synchronous motor electromagnetic force wave characteristic parameter and each rank Reeb, characteristic parameter
Including Reeb order r, Reeb frequency frWith Reeb amplitude
2) permanent magnet synchronous electric electromechanical magnetic field and structure field strength coupling model are established, is calculated in the case of loading different current sources forever
The electric current and electromagnetic force frequency spectrum of magnetic-synchro motor, and emulate its vibration noise frequency spectrum；
3) studied permanent magnet synchronous motor object, analytical procedure 2 are directed to) obtained different electric currents electric current, electromagnetism when powering
Power and vibration noise spectral characteristic, shadow of the research inverter current harmonic wave to permanent magnet synchronous motor wide speed regulating range internal vibration noise
It rings；
4) experiment test is carried out to studied permanent magnet synchronous motor object, obtains experimental data, is compared using experimental data
Step 2) emulates data, verification step 2) it is carried out using the permanent magnet synchronous electric electromechanical magnetic field and structure field strength coupling model established
The accuracy of vibration noise emulation mode.
Specific step is as follows for the step 1):
1.1) permanent magnet synchronous motor air-gap field is derived, does not consider the influence of iron core magnetic resistance and saturation, sinusoidal current power supply
When air gap flux density expression formula are as follows:
Wherein, fμ(θ, t)=FμCos (μ p θ-μ ω t) is μ rotor permanent magnet harmonic wave magnetomotive force, and μ=1,3,5 ..., p are
Motor number of pole-pairs, ω are fundamental magnetic potential angular frequency, FμFor rotor permanent magnet μ subharmonic magnetomotive force amplitude, θ is electromechanics angle
Degree；
fν(θ, t)=Fνcos(νpθ-lωt-φν) be stator v subharmonic magnetomotive force, v=1,5,7, FvFor rotor permanent magnet
Body μ subharmonic magnetomotive force amplitude, l are Stator Current Harmonic number, φvFor v stator armature harmonic wave initial phase；
For relative magnetic permeability function；Λ in formula0For the constant of air-gap permeance function
Component, ΛkFor the amplitude of air-gap permeance harmonic component, k=1,2,3 ... be air-gap permeance overtone order, and z is number of stator slots；
For flux density of the rotor field in air gap that average permeance modulating generates,For permeance modulating of slotting
Flux density of the rotor field of generation in air gap；Magnetic of the stator field in air gap generated for average permeance modulating
It is close,Flux density of the stator field in air gap generated for fluting permeance modulating；BpmTurn for what average permeance modulating generated
Flux density the sum of of the rotor field that flux density of the sub- magnetic field in air gap and fluting permeance modulating generate in air gap, BslFor average magnetic
Lead flux density of the stator field of flux density and fluting permeance modulating generation of the stator field of modulation generation in air gap in air gap
The sum of；
1.2) according to Maxwell stress tensor method and ignore tangential magnetic flux density, radial electromagnetic force wave on unit area
Instantaneous value expression are as follows:
pr(θ, t) is the radial electromagnetic force density on stator inner surface unit area, unit N/m2, b (θ, t) is air gap
Flux density, μ0=4 π × 10-7H/m is space permeability.ppmFor the electromagnetism force density that rotor field interaction generates, pslIt is fixed
The electromagnetism force density that sub- magnetic field interaction generates, ppm-slThe electromagnetism force density generated for the interaction of rotor magnetic field；
1.3) it derives rotor field interaction and generates electromagnetic force density feature parameter,
The electromagnetism force density p that rotor field interaction generatespmAre as follows: the rotor field of average permeance modulating, which interacts, to be produced
Raw electromagnetic force waveThe rotor field of average permeance modulating and the rotor field of stator teeth notching permeance modulating
Interact the electromagnetic force wave generatedWhat the rotor field interaction of stator teeth notching permeance modulating generated
Electromagnetic force waveThe sum of；
The radial force wave characteristic parameter list that the rotor field interaction as shown in table 1 of electromagnetic force characteristic parameter generates is arranged,
Table 1
WhereinN is the revolving speed of motor, and p is the number of pole-pairs of motor,For average magnetic conductance
The rotor field air gap flux density of modulation；For the rotor field air gap flux density for permeance modulating of slotting；μ1And μ2
The overtone order for respectively representing two interaction rotor fields of interaction, with the same meaning of μ；Work as μ1And μ2When equal, μ is used
Instead of；
1.4) it derives stator-rotator magnetic field interactions and generates electromagnetic force wave characteristic parameter,
The electromagnetism force density p that the interaction of rotor magnetic field generatespm-slAre as follows: the rotor magnetic field of average permeance modulating is mutual
Electromagnetic force wave caused by acting onThe average rotor field of permeance modulating and determining for stator teeth notching magnetic field modulation
The electromagnetic force wave that sub- magnetic field interaction generatesThe rotor field and average magnetic conductance that stator teeth notching modulation generates
Modulate the electromagnetic force wave that stator field interaction generatesThe stator-rotator magnetic that stator teeth notching permeance modulating generates
The electromagnetic force wave that field interactions generatesThe sum of；
Arrange the characteristic parameter that the stator-rotator magnetic field interactions as shown in table 2 of electromagnetic force wave characteristic parameter generates radial Reeb
Table,
Table 2
WhereinFor the stator field air gap flux density of average permeance modulating,For
The stator field air gap flux density of fluting permeance modulating；v1And v2Respectively represent two interaction stator armature magnetic of interaction
The overtone order of field, with the same meaning of v；Work as v1And v2When equal, replaced with v；
1.5) it derives stator field interaction and generates electromagnetic force wave characteristic parameter,
The electromagnetism force density p that stator field interaction generatesslAre as follows: the stator field of average permeance modulating, which interacts, to be produced
Raw electromagnetic force waveThe stator field of average magnetic conductance debugging and the stator field phase of stator teeth notching permeance modulating
The electromagnetic force wave that interaction generatesThe electromagnetism that the stator field interaction of stator teeth notching permeance modulating generates
ReebThe sum of；
Arrange the characteristic parameter that the stator field interaction as shown in table 3 of electromagnetic force wave characteristic parameter generates radial Reeb
Table,
Table 3
Specific step is as follows for the step 2):
2.1) permanent magnet synchronous motor three phase mains power supply circuit is established in Simplorer, will survey three-phase current data
It is set as current of electric source, exports as " .sph " file；
2.2) permanent magnet synchronous electric is established with permanent magnet synchronous motor specific structure parameter in Maxwell finite element emulation software
Machine 2D electromagnetic finite meta-model, setting power supply are " .sph " file that previous step saves, i.e., will be actually introduced into inverter harmonic
Three-phase current is set as the current source of permanent magnet synchronous motor 2D electromagnetic finite meta-model, the electromagnetism under the effect of calculating current harmonic wave
Power；
2.3) permanent magnet synchronous motor is established with permanent magnet synchronous motor specific structure parameter in SolidWorks design software
3D stator structure model；
2.4) permanent magnet synchronous motor material parameter is set in Workbench finite element emulation software, to permanent magnet synchronous electric
Machine carries out model analysis, obtains each rank modal frequency of permanent magnet synchronous motor and the vibration shape；
2.5) permanent magnet synchronous motor material parameter is set in Workbench finite element emulation software, establishes permanent-magnet synchronous
Electromagnetic Field and structure field strength coupling model carry out electromagnetic field and structure field coupling Simulation and analyze, calculate speed regulation by constant torque and
Vibration noise spectral characteristic under weak-magnetic speed-regulating operating condition.
The beneficial effects of the present invention are: inverter harmonic of the present invention influences to divide on automobile permanent magnet synchronous motor vibration noise
Analysis method is realized and is effectively analyzed inverter harmonic on the influence of automobile permanent magnet synchronous motor vibration noise.The method can
It is widely used in the analysis of general integer slot multipole logarithm electric car permanent magnet synchronous motor PMSM vibration noise.
Detailed description of the invention
Fig. 1 is that the electric inverter harmonic of the present invention illustrates automobile permanent magnet synchronous motor vibration noise impact analysis method process
Figure；
Fig. 2 is permanent magnet synchronous motor three-phase current of the present invention source power supply circuit analogous diagram；
Fig. 3 a is the lower 2 kinds of current sources A phase current waveform figure of permanent magnet synchronous motor 3000rpm of the present invention；
Fig. 3 b is the lower 2 kinds of current sources A phase current waveform figure of permanent magnet synchronous motor 8000rpm of the present invention；
Fig. 4 is permanent magnet synchronous motor 2D electromagnetic finite meta-model diagram of the present invention；
Fig. 5 is permanent magnet synchronous motor 3000rpm of the present invention and 8000rpm electric current each harmonic accounting figure；
R=0 rank electromagnetic force wave spectrogram when Fig. 6 a is permanent magnet synchronous motor 3000rpm of the present invention；
R=0 rank electromagnetic force wave spectrogram when Fig. 6 b is permanent magnet synchronous motor 8000rpm of the present invention；
R=8 rank electromagnetic force wave spectrogram when Fig. 7 a is permanent magnet synchronous motor 3000rpm of the present invention；
R=8 rank electromagnetic force wave spectrogram when Fig. 7 b is permanent magnet synchronous motor 3000rpm of the present invention；
Fig. 8 is permanent magnet synchronous motor 3D stator structure illustraton of model of the present invention；
Fig. 9 is permanent magnet synchronous motor 3D stator structure modal graph of the present invention；
Figure 10 is permanent magnet synchronous electric electromechanical magnetic field of the present invention-structure field coupling figure；
Figure 11 a is permanent magnet synchronous motor 3000rpm electric and magnetic oscillation calculated result figure of the present invention；
Figure 11 b is permanent magnet synchronous motor 8000rpm electric and magnetic oscillation calculated result figure of the present invention；
Figure 12 a is permanent magnet synchronous motor 3000rpm electromagnetic noise calculated result figure of the present invention；
Figure 12 b is permanent magnet synchronous motor 8000rpm electromagnetic noise calculated result figure of the present invention；
Figure 13 a is permanent magnet synchronous motor 3000rpm electric and magnetic oscillation experiment simulation comparison diagram of the present invention；
Figure 13 b is permanent magnet synchronous motor 8000rpm electric and magnetic oscillation experiment simulation comparison diagram of the present invention.
Specific embodiment
Electric car permanent magnet synchronous motor wide-range-timing vibration noise source as shown in Figure 1 analysis method flow diagram,
Specifically comprise the following steps:
Step 1, theory analysis permanent magnet synchronous motor PMSM electromagnetic force wave characteristic parameter (Reeb order r, Reeb frequency
fr, Reeb amplitude) and each rank Reeb harmonic wave source.
1.1 derive permanent magnet synchronous motor air-gap field, the influence of iron core magnetic resistance and saturation are not considered, when sinusoidal current is powered
The expression formula of air gap flux density are as follows:
Wherein, fμ(θ, t)=FμCos (μ p θ-μ ω t) is μ rotor permanent magnet harmonic wave magnetomotive force, and μ=1,3,5 ..., p are
Motor number of pole-pairs, ω are fundamental magnetic potential angular frequency, FμFor rotor permanent magnet μ subharmonic magnetomotive force amplitude, θ is electromechanics angle
Degree.
fν(θ, t)=Fνcos(νpθ-lωt-φν) be stator v subharmonic magnetomotive force, v=1,5,7, FvFor rotor permanent magnet
Body μ subharmonic magnetomotive force amplitude, l are Stator Current Harmonic number, φvFor v stator armature harmonic wave initial phase.
For relative magnetic permeability function；Λ in formula0For the constant of air-gap permeance function
Component, ΛkFor the amplitude of air-gap permeance harmonic component, k=1,2,3 ... be air-gap permeance overtone order, and z is number of stator slots；
For flux density of the rotor field in air gap that average permeance modulating generates,For permeance modulating of slotting
Flux density of the rotor field of generation in air gap；Magnetic of the stator field in air gap generated for average permeance modulating
It is close,Flux density of the stator field in air gap generated for fluting permeance modulating；BpmTurn for what average permeance modulating generated
Flux density the sum of of the rotor field that flux density of the sub- magnetic field in air gap and fluting permeance modulating generate in air gap, BslFor average magnetic
Lead flux density of the stator field of flux density and fluting permeance modulating generation of the stator field of modulation generation in air gap in air gap
The sum of.
1.2 according to Maxwell stress tensor method and ignore tangential magnetic flux density, radial electromagnetic force wave on unit area
Instantaneous value expression are as follows:
pr(θ, t) is the radial electromagnetic force density on stator inner surface unit area, unit N/m2, b (θ, t) is air gap
Flux density, μ0=4 π × 10-7H/m is space permeability.ppmFor the electromagnetism force density that rotor field interaction generates, pslIt is fixed
The electromagnetism force density that sub- magnetic field interaction generates, ppm-slThe electromagnetism force density generated for the interaction of rotor magnetic field.
1.3, which derive rotor field interaction, generates electromagnetic force density feature parameter (Reeb order r, Reeb frequency fr, power
Wave amplitude), source is following formula and the radial force wave characteristic parameter list that the interaction of 1 rotor field of table generates.
The electromagnetic force wave that the rotor field interaction of average permeance modulating generates are as follows:
The electromagnetism that the rotor field of average permeance modulating and the rotor field interaction of stator teeth notching permeance modulating generate
Reeb are as follows:
The electromagnetic force wave that the rotor field interaction of stator teeth notching permeance modulating generates are as follows:
WhereinFor the rotor field air gap flux density of average permeance modulating；For
The rotor field air gap flux density of fluting permeance modulating；μ1And μ2Respectively represent two interaction rotor fields of interaction
Overtone order, with the same meaning of μ；Work as μ1And μ2When equal, replaced with μ；Similarly hereinafter.
Arrange the radial force wave characteristic ginseng that electromagnetic force characteristic parameter is as shown in table 1, and table 1 generates for rotor field interaction
Number table.
Table 1
WhereinN is the revolving speed of motor, and p is the number of pole-pairs of motor.
1.4, which derive stator-rotator magnetic field interactions, generates electromagnetic force wave characteristic parameter, and source is 2 stator-rotator magnetic of following formula and table
Field interactions generates the characteristic parameter table of radial Reeb.
Electromagnetic force wave caused by the stator-rotator magnetic field interactions of average permeance modulating:
The electromagnetism that the rotor field of average permeance modulating and the stator field interaction of stator teeth notching magnetic field modulation generate
Reeb:
The electromagnetic force that the rotor field and average permeance modulating stator field interaction that stator teeth notching modulation generates generate
Wave:
The electromagnetic force wave that the stator-rotator magnetic field interactions that stator teeth notching permeance modulating generates generates:
WhereinFor the stator field air gap flux density of average permeance modulating,For
The stator field air gap flux density of fluting permeance modulating；v1And v2Respectively represent two interaction stator armature magnetic of interaction
The overtone order of field, with the same meaning of v；Work as v1And v2When equal, replaced with v.
Arrangement electromagnetic force wave characteristic parameter is as shown in table 2, and table 2 is the spy that stator-rotator magnetic field interactions generates radial Reeb
Levy parameter list
Table 2
1.5, which derive stator field interaction, generates electromagnetic force wave characteristic parameter, and source is 3 stator field phase of following formula and table
Interaction generates the dominant frequency component and its harmonic wave source table of radial Reeb.
The electromagnetic force wave that the stator field interaction of average permeance modulating generates:
The electromagnetism that the stator field interaction of the stator field and stator teeth notching permeance modulating of average magnetic conductance debugging generates
Reeb:
The electromagnetic force wave that the stator field interaction of stator teeth notching permeance modulating generates:
Arrangement electromagnetic force wave characteristic parameter is as shown in table 3, and table 3 is the feature that stator field interaction generates radial Reeb
Parameter list
Table 3
WhereinN is the revolving speed of motor, and p is the number of pole-pairs of motor.
Step 2 establishes PMSM multiple physical field coupled vibration analysis finite element model and calculates speed regulation by constant torque and weak magnetic tune
Permanent magnet motor vibration noise spectral characteristic when fast.
2.1 establish permanent magnet synchronous motor three phase mains power supply circuit in Simplorer simulation software, as shown in Fig. 2, sample
Machine is 48 slot, a 8 pole internal permanent magnet synchronous motor, uses maximum torque per ampere control, 4000rpm in 4000rpm or less
It is controlled above using weak magnetic, sets current source for following 4 kinds of current datas respectively, and export as " .sph " file, A phase electricity
Waveform is flowed as shown in Fig. 3 a, 3b.
1)Ih3000Harmonic current is surveyed in speed regulation by constant torque area operation, revolving speed 3000rpm rated power operation for motor.
2)Is3000=194A, i.e. amplitude are the sinusoidal current of 194A, fundamental current when being 3000rpm rated power.
3)Ih8000Harmonic current is surveyed in weak-magnetic speed-regulating area operation, revolving speed 8000rpm rated power operation for motor.
4)Is8000=145A, i.e. amplitude are the sinusoidal current of 145A, fundamental current when being 8000rpm rated power.
2.2 establish permanent magnet synchronous electric in Maxwell finite element emulation software with permanent magnet synchronous motor specific structure parameter
Machine 2D electromagnetic finite meta-model calculates different electric currents and supplies as shown in figure 4, setting power supply is " .sph " file that previous step saves
Electric current and electromagnetic force frequency spectrum in electric situation, as shown in Fig. 5,6a, 6b, 7a, 7b.
2.3 establish permanent magnet synchronous motor 3D in SolidWorks design software with permanent magnet synchronous motor specific structure parameter
Stator structure model, as shown in Figure 8.
2.4 are arranged permanent magnet synchronous motor material parameter in Workbench finite element emulation software, to permanent magnet synchronous motor
It carries out model analysis (see Fig. 9), model analysis obtains the eigenfrequncies and vibration models of motor stator structure, wherein coming to this paper model machine
It says, 0 rank and 8 rank intrinsic frequencies are effective mode, when the order of motor radial direction Reeb is consistent with intrinsic frequency with frequency, motor
It may resonate, cause bigger vibration noise.
2.5 are arranged permanent magnet synchronous motor material parameter in Workbench finite element emulation software, establish as shown in Figure 10
Permanent magnet synchronous electric electromechanical magnetic field and structure field strength coupling model, carry out electromagnetic field and structure field coupling Simulation and analyze, calculate 4 kinds
Vibration noise spectral characteristic under electric current is powered, 0 rank of the calculated result as shown in Figure 11 a, 11b and 12a, 12b, near switching frequency
With the maximum vibration noise of generation at 8 rank intrinsic frequencies.
The influence of step 3, analysis inverter harmonic to the vibration noise of model machine.
Influence of the 3.1 analysis inverter harmonics to the vibration noise of model machine
Analytical procedure 2) obtained electric current, radial electromagnetic force and vibration noise frequency spectrum, as seen from Figure 5, inverter electricity
Stream major harmonic frequency is k1fc±k2f(k1、k2For the different positive integer of odd even), 8000rpm electric current is humorous in entire band limits
Wave accounting is higher than 3000rpm；It can be seen from Fig. 6 a, 6b and 7a, 7b compared with when sinusoidal current is powered, inverter harmonic electricity
6f, 12f spectrum component, the inverter switching frequency k of r=0 rank electromagnetic force wave when stream power supply1fc±k2f(k1、k2It is identical for odd even
Positive integer) at Reeb amplitude be significantly increased；Compared with when sinusoidal current power supply, r=8 rank when inverter harmonic electric current is powered
Amplitude increases larger, switching frequency k at 4f, 8f, 16f of the spectrum component of electromagnetic force wave1fc±k2f(k1、k2It is identical for odd even
Positive integer) at r=8 rank electromagnetic force wave have increase, increase without r=0 rank electromagnetic force wave obvious；By Figure 11 a, 11b and 12a, 12b
As can be seen that compared with sinusoidal current, when inverter harmonic electric current is powered, 0 rank and 8 ranks of the vibration noise near switching frequency
Intrinsic frequency amplitude increases；Compared with speed regulation by constant torque, vibration noise integrally all increases when weak-magnetic speed-regulating, near switching frequency
0 rank and 8 rank intrinsic frequencies at amplification it is more apparent.
Step 4, experiment and theoretical and emulation are verified.
4.1 carry out vibration experiment to studied permanent magnet synchronous motor using vibrating sensor, and experiment and emulation vibration accelerate
As shown in Figure 13 a, 13b, experiment is consistent degree comparison spectrogram substantially with emulation vibration acceleration result, it may be said that the bright present invention is imitative
The accuracy of true method.
4.2 utilize experimental data contrast simulation data, are verified.Comparative analysis experiment and simulation result, for herein
Model machine, inverter harmonic can introduce the time-domain spectral component of new r=0 rank and r=8 rank electromagnetic force wave, r=0 rank power when powering
12f spectrum component, the inverter switching frequency k of wave1fc±k2f(k1、k2For the identical positive integer of odd even)；R=8 rank electromagnetic force wave
4f, 8f, 16f spectrum component, k1fc±k2f(k1、k2For the identical positive integer of odd even) at r=0 rank electromagnetic force wave switching frequency
Place increases more obvious；When speed regulation by constant torque and weak-magnetic speed-regulating, the introducing of inverter harmonic electric current can all aggravate permanent magnet synchronous electric
The vibration noise of machine, compare under, influence of the inverter harmonic to 8000rpm weak-magnetic speed-regulating be greater than to 3000rpm permanent torque
The influence of speed regulation；Introducing inverter harmonic electric current can aggravate to resonate at 0 rank and 8 rank intrinsic frequencies, and the serious electric car that reduces multiplies
Sit comfort and operational reliability.
Claims (3)
1. a kind of inverter harmonic is to automobile permanent magnet synchronous motor vibration noise impact analysis method, which is characterized in that specific packet
Include following steps:
1) the theory analysis harmonic wave source of permanent magnet synchronous motor electromagnetic force wave characteristic parameter and each rank Reeb, characteristic parameter includes
Reeb order r, Reeb frequency frWith Reeb amplitude
2) permanent magnet synchronous electric electromechanical magnetic field and structure field strength coupling model are established, it is same to calculate permanent magnetism in the case of loading different current sources
The electric current and electromagnetic force frequency spectrum of motor are walked, and emulates its vibration noise frequency spectrum；
3) studied permanent magnet synchronous motor object, analytical procedure 2 are directed to) obtained different electric currents electric current when powering, electromagnetic force and
Vibration noise spectral characteristic studies influence of the inverter current harmonic wave to permanent magnet synchronous motor wide speed regulating range internal vibration noise；
4) experiment test is carried out to studied permanent magnet synchronous motor object, obtains experimental data, compare step using experimental data
2) data, verification step 2 are emulated) it is vibrated using the permanent magnet synchronous electric electromechanical magnetic field and structure field strength coupling model established
The accuracy of noise simulation method.
2. inverter harmonic is special to automobile permanent magnet synchronous motor vibration noise impact analysis method according to claim 1
Sign is that specific step is as follows for the step 1):
1.1) permanent magnet synchronous motor air-gap field is derived, does not consider the influence of iron core magnetic resistance and saturation, gas when sinusoidal current is powered
The expression formula of gap flux density are as follows:
Wherein, fμ(θ, t)=FμCos (μ p θ-μ ω t) is μ rotor permanent magnet harmonic wave magnetomotive force, and μ=1,3,5 ..., p are motor
Number of pole-pairs, ω are fundamental magnetic potential angular frequency, FμFor rotor permanent magnet μ subharmonic magnetomotive force amplitude, θ is electromechanics angle；
fν(θ, t)=Fνcos(νpθ-lωt-φν) be stator v subharmonic magnetomotive force, v=1,5,7, FvIt is rotor permanent magnet μ times
Harmonic wave magnetomotive force amplitude, l are Stator Current Harmonic number, φvFor v stator armature harmonic wave initial phase；
For relative magnetic permeability function；Λ in formula0It is constant point of air-gap permeance function
Amount, ΛkFor the amplitude of air-gap permeance harmonic component, k=1,2,3 ... be air-gap permeance overtone order, and z is number of stator slots；
For flux density of the rotor field in air gap that average permeance modulating generates,It is generated for fluting permeance modulating
Flux density of the rotor field in air gap；For flux density of the stator field in air gap that average permeance modulating generates,Flux density of the stator field in air gap generated for fluting permeance modulating；BpmThe rotor generated for average permeance modulating
Flux density the sum of of the rotor field that flux density of the magnetic field in air gap and fluting permeance modulating generate in air gap, BslFor average magnetic conductance
Modulate flux density of the stator field in air gap generated and flux density in air gap of stator field that fluting permeance modulating generates it
With；
1.2) according to Maxwell stress tensor method and ignore tangential magnetic flux density, radial electromagnetic force wave is instantaneous on unit area
Value expression are as follows:
pr(θ, t) is the radial electromagnetic force density on stator inner surface unit area, unit N/m2, b (θ, t) is air gap flux density,
μ0=4 π × 10-7H/m is space permeability；ppmFor the electromagnetism force density that rotor field interaction generates, pslFor stator field
Interact the electromagnetism force density generated, ppm-slThe electromagnetism force density generated for the interaction of rotor magnetic field；
1.3) it derives rotor field interaction and generates electromagnetic force density feature parameter,
The electromagnetism force density p that rotor field interaction generatespmAre as follows: what the rotor field interaction of average permeance modulating generated
Electromagnetic force waveThe rotor field of average permeance modulating and the rotor field of stator teeth notching permeance modulating are mutual
Act on the electromagnetic force wave generatedThe electromagnetism that the rotor field interaction of stator teeth notching permeance modulating generates
ReebThe sum of；
The radial force wave characteristic parameter list that the rotor field interaction as shown in table 1 of electromagnetic force characteristic parameter generates is arranged,
Table 1
WhereinN is the revolving speed of motor, and p is the number of pole-pairs of motor,For average permeance modulating
Rotor field air gap flux density；For the rotor field air gap flux density for permeance modulating of slotting；μ1And μ2Generation respectively
The overtone order of two interaction rotor fields of table interaction, with the same meaning of μ；Work as μ1And μ2When equal, replaced with μ；
1.4) it derives stator-rotator magnetic field interactions and generates electromagnetic force wave characteristic parameter,
The electromagnetism force density p that the interaction of rotor magnetic field generatespm-slAre as follows: the stator-rotator magnetic field interactions of average permeance modulating
Caused electromagnetic force waveThe rotor field of average permeance modulating and the stator magnet of stator teeth notching magnetic field modulation
The electromagnetic force wave that field interactions generatesThe rotor field and average permeance modulating that stator teeth notching modulation generates
The electromagnetic force wave that stator field interaction generatesThe rotor magnetic field phase that stator teeth notching permeance modulating generates
The electromagnetic force wave that interaction generatesThe sum of；
The characteristic parameter table that the stator-rotator magnetic field interactions as shown in table 2 of electromagnetic force wave characteristic parameter generates radial Reeb is arranged,
Table 2
WhereinFor the stator field air gap flux density of average permeance modulating,For fluting
The stator field air gap flux density of permeance modulating；v1And v2Respectively represent two interaction stator armature magnetic fields of interaction
Overtone order, with the same meaning of v；Work as v1And v2When equal, replaced with v；
1.5) it derives stator field interaction and generates electromagnetic force wave characteristic parameter,
The electromagnetism force density p that stator field interaction generatesslAre as follows: what the stator field interaction of average permeance modulating generated
Electromagnetic force waveThe stator field of average magnetic conductance debugging and the stator field phase interaction of stator teeth notching permeance modulating
With the electromagnetic force wave of generationThe electromagnetic force wave that the stator field interaction of stator teeth notching permeance modulating generatesThe sum of；
The characteristic parameter table that the stator field interaction as shown in table 3 of electromagnetic force wave characteristic parameter generates radial Reeb is arranged,
Table 3
3. inverter harmonic is special to automobile permanent magnet synchronous motor vibration noise impact analysis method according to claim 1
Sign is that specific step is as follows for the step 2):
2.1) permanent magnet synchronous motor three phase mains power supply circuit is established in Simplorer, by actual measurement three-phase current data setting
For current of electric source, " .sph " file is exported as；
2.2) permanent magnet synchronous motor 2D is established with permanent magnet synchronous motor specific structure parameter in Maxwell finite element emulation software
Electromagnetic finite meta-model, setting power supply are " .sph " file that previous step saves, i.e., will be actually introduced into the three-phase of inverter harmonic
Electric current is set as the current source of permanent magnet synchronous motor 2D electromagnetic finite meta-model, the lower magnetic flux density of calculating current harmonic wave effect with
Electromagnetic force；
2.3) permanent magnet synchronous motor 3D is established in SolidWorks design software with permanent magnet synchronous motor specific structure parameter to determine
Sub-structure model；
2.4) in Workbench finite element emulation software be arranged permanent magnet synchronous motor material parameter, to permanent magnet synchronous motor into
Row model analysis obtains each rank modal frequency of permanent magnet synchronous motor and the vibration shape；
2.5) permanent magnet synchronous motor material parameter is set in Workbench finite element emulation software, establishes permanent magnet synchronous motor
Electromagnetic field and structure field strength coupling model, carry out electromagnetic field and structure field coupling Simulation is analyzed, and calculate speed regulation by constant torque and weak magnetic
Adjust the speed vibration noise spectral characteristic under operating condition.
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| CN112285562A (en) * | 2020-11-18 | 2021-01-29 | 中国海洋石油集团有限公司 | Asynchronous motor fault detection method based on multi-signal fusion of electromagnetic field and thermal field |
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| CN112069709A (en) * | 2020-09-04 | 2020-12-11 | 天津大学 | Motor electromagnetic vibration rapid calculation method considering stator tooth modulation effect |
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| US12081147B2 (en) | 2021-02-24 | 2024-09-03 | Jiangsu University | Method for reducing electromagnetic vibration of permanent magnet motor with fractional slot concentrated winding |
| CN112968582A (en) * | 2021-03-05 | 2021-06-15 | 江苏大学 | Low-vibration permanent magnet brushless motor optimization design method |
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| CN113489387B (en) * | 2021-07-30 | 2023-03-10 | 东方电气集团东方电机有限公司 | Method for weakening electromagnetic vibration and noise of permanent magnet synchronous motor with specific frequency |
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