CN106849833A - A kind of motor active denoising method and system - Google Patents
A kind of motor active denoising method and system Download PDFInfo
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- CN106849833A CN106849833A CN201710236003.9A CN201710236003A CN106849833A CN 106849833 A CN106849833 A CN 106849833A CN 201710236003 A CN201710236003 A CN 201710236003A CN 106849833 A CN106849833 A CN 106849833A
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Abstract
The corresponding relation that the motor noise produced the invention discloses a kind of motor active denoising method and system, including under the parameter of electric machine of motor powered of power supply parameter according to current transformer, current transformer and the Parameter Conditions is set up between harmonic wave and motor noise；Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；The harmonic wave of current generation noise is determined according to current power supply parameter, current motor parameter and corresponding relation；Treatment is filtered to the current harmonic wave for producing noise, to eliminate the harmonic wave of current generation noise.During to motor control, the present invention is it is determined that after the harmonic wave that can currently produce noise, treatment is filtered to the current harmonic wave for producing noise, to filter out the harmonic wave of current generation noise, accurately eliminated so as to realize being oriented the harmonic wave, influence of the converter harmonic to motor noise is actively reduced, active noise reduction, excellent noise reduction effect is realized.
Description
Technical field
The present invention relates to technical field of motors, more particularly to a kind of motor active denoising method and system.
Background technology
Motor is used in the every field of life as a kind of device for converting electrical energy into mechanical energy.Generally adopt at present
Speed regulating control is carried out to motor with current transformer, with energy-conservation, be capable of achieving large-scale high-speed and continuous speed regulating control, adapt to it is many
The advantages of planting complex work environment.But have many harmonic waves when current transformer powers motor to produce, harmonic wave can be at electric machine iron core
Electromagnetic force is produced, causes motor oscillating so as to produce noise, have impact on the environment of people's life and work.Made an uproar to reduce motor
Sound, mainly carries out Noise measarement from the angle of motor in the prior art, although can to a certain extent reduce electromechanics noise,
Reduce while but accurate pointing can not be realized due to the electromagnetic noise that converter harmonic is produced.
Therefore, how to provide a kind of scheme for solving above-mentioned technical problem is that those skilled in the art need solution to ask at present
Topic.
The content of the invention
It is an object of the invention to provide a kind of motor active denoising method, converter harmonic is actively reduced to motor noise
Influence, realizes active noise reduction, excellent noise reduction effect；It is a further object of the present invention to provide a kind of motor active noise reduction system.
In order to solve the above technical problems, the invention provides a kind of motor active denoising method, including：
Produced under the parameter of electric machine and the Parameter Conditions of the motor powered according to the power supply parameter of current transformer, the current transformer
The corresponding relation set up between harmonic wave and motor noise of motor noise；
Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；
The humorous of current generation noise is determined according to the current power supply parameter, current motor parameter and the corresponding relation
Ripple；
Treatment is filtered to the current harmonic wave for producing noise, to eliminate the harmonic wave of the current generation noise.
Preferably, the parameter of electric machine and the ginseng of the motor that the power supply parameter of the foundation current transformer, the current transformer are powered
The process of the corresponding relation that the motor noise of generation is set up between harmonic wave and motor noise is under said conditions：
The parameter of electric machine and motor noise now of the power supply parameter of the current transformer and its motor of power supply are obtained, its
In, the power supply parameter includes voltage, electric current and the frequency of current transformer output, and the parameter of electric machine includes the motor of motor
Power, rated voltage, rated current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to the power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), its
In,ωk=k ω, θ are Space Angle, and k is the humorous of the harmonic wave of the current transformer output
Ripple number of times, ω is the angular frequency of the fundamental wave of the current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to the air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux it is close
The relation that degree-harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, the electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；The magnetic flux density-harmonic relationships formula be b (θ, t)
=f (θ, t) λ (θ, t)；
According to the pass between the relation between the harmonic wave and the electromagnetic force and the electromagnetic force and the motor noise
System obtains the corresponding relation between the harmonic wave and the motor noise.
Preferably, the process of the current power supply parameter obtained when current transformer is powered to motor and current motor parameter
For：
The current power supply parameter and current motor parameter when current transformer is powered to motor are obtained in real time.
In order to solve the above technical problems, present invention also offers a kind of motor active noise reduction system, including：
Corresponding relation building module, the parameter of electric machine for the motor of power supply parameter and its power supply according to current transformer is set up
Corresponding relation between harmonic wave and motor noise；
Parameter acquisition module, for obtaining current power supply parameter and current motor parameter when current transformer is powered to motor；
Harmonic wave determining module, for being determined according to the current power supply parameter, current motor parameter and the corresponding relation
The harmonic wave of current generation noise；
Filtration module, for being filtered treatment to the current harmonic wave for producing noise, to eliminate the current generation
The harmonic wave of noise.
Preferably, the parameter of electric machine and the ginseng of the motor that the power supply parameter of the foundation current transformer, the current transformer are powered
The process of the corresponding relation that the motor noise of generation is set up between harmonic wave and motor noise is under said conditions：
The parameter of electric machine and motor noise now of the power supply parameter of the current transformer and its motor of power supply are obtained, its
In, the power supply parameter includes voltage, electric current and the frequency of current transformer output, and the parameter of electric machine includes the motor of motor
Power, rated voltage, rated current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to the power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), its
In,ωk=k ω, θ are Space Angle, and k is the humorous of the harmonic wave of the current transformer output
Ripple number of times, ω is the angular frequency of the fundamental wave of the current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to the air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux it is close
The relation that degree-harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, the electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；The magnetic flux density-harmonic relationships formula be b (θ, t)
=f (θ, t) λ (θ, t)；
According to the pass between the relation between the harmonic wave and the electromagnetic force and the electromagnetic force and the motor noise
System obtains the corresponding relation between the harmonic wave and the motor noise.
Preferably, the parameter acquisition module specifically for obtaining current power supply ginseng when current transformer is powered to motor in real time
Number and current motor parameter.
The invention provides a kind of motor active denoising method and system, including according to power supply parameter, the unsteady flow of current transformer
It is right that the motor noise produced under the parameter of electric machine of the motor that device is powered and the Parameter Conditions is set up between harmonic wave and motor noise
Should be related to；Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；According to current power supply parameter, when
Front motor parameter and corresponding relation determine the harmonic wave of current generation noise；Treatment is filtered to the current harmonic wave for producing noise,
To eliminate the harmonic wave of current generation noise.
It can be seen that, the parameter of electric machine of the motor that the present invention powers according to the power supply parameter of current transformer, the current transformer in advance with
The corresponding relation that the motor noise produced under the Parameter Conditions is set up between harmonic wave and motor noise, to motor control process
In, can determine currently produce noise from the corresponding relation for pre-building according to current power supply parameter and current motor parameter
Harmonic wave, treatment then is filtered to the current harmonic wave for producing noise, to filter out the harmonic wave of current generation noise,
Accurately eliminated so as to realize being oriented the harmonic wave, actively reduce influence of the converter harmonic to motor noise, realized
Active noise reduction, excellent noise reduction effect.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
A kind of flow chart of the process of motor active denoising method that Fig. 1 is provided for the present invention；
A kind of structural representation of motor active noise reduction system that Fig. 2 is provided for the present invention.
Specific embodiment
Core of the invention is to provide a kind of motor active denoising method, actively reduces converter harmonic to motor noise
Influence, realizes active noise reduction, excellent noise reduction effect；Another core of the invention is to provide a kind of motor active noise reduction system.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Refer to Fig. 1, a kind of flow chart of the process of motor active denoising method that Fig. 1 is provided for the present invention, the method
Including：
Step S11：Under the parameter of electric machine and the Parameter Conditions of the motor powered according to the power supply parameter of current transformer, current transformer
The corresponding relation that the motor noise of generation is set up between harmonic wave and motor noise；
Firstly the need of explanation, the corresponding relation set up here between harmonic wave and motor noise pre-builds,
Only need to just begin setting up, subsequently directly take back use, after establishing, by corresponding relation storage in a control unit,
As the follow-up basis for determining the current harmonic wave for producing noise.Certainly, also may be used according to actual needs during follow-up use
To update, delete or add new corresponding relation.In addition, may include in corresponding relation between harmonic wave and motor noise
Multigroup corresponding relation, reason is the parameter of electric machine of the motor powered for the power supply parameter and current transformer of different converter, harmonic wave
Corresponding relation between motor noise is also likely to be different, for example, same motor, the power supply parameter difference of current transformer
(for example exporting different Current Voltages), the noise that motor is produced is different；In addition, the power supply parameter of current transformer is identical, but
It is that, when being powered to different motors, the noise that motor is produced is also likely to be different.Therefore, the application can be according to different type
Motor and the power supply parameter of current transformer pre-build corresponding relation between multigroup harmonic wave and motor noise.
In addition, the parameter of electric machine and the parameter of the motor powered according to the power supply parameter of current transformer, current transformer in advance here
Under the conditions of the purpose of corresponding relation set up between harmonic wave and motor noise of the motor noise that produces be in order to follow-up current transformer exists
When being powered to motor, can directly be determined under the Parameter Conditions according to the power supply parameter of current transformer and the parameter of electric machine (
Under the conditions of the parameter of electric machine of the motor that the power supply parameter and current transformer of current transformer i.e. now are powered) the humorous of motor noise can be produced
Ripple, directly takes appropriate measures and eliminates the fractional harmonic, is produced with motor characteristic system level, from noise from current transformer control
Source of students head carries out motor active noise reduction control.
Specifically, motor once it is determined that, the parameter of electric machine is also determined that, in addition, the power supply parameter of current transformer can pass through
Inverter controller is directly obtained, and motor noise can also be got by voice collection device.After above-mentioned parameter is obtained, just can
By the relation being accordingly calculated between harmonic wave and motor noise.
As a kind of preferred embodiment, the parameter of electric machine of the motor powered according to the power supply parameter of current transformer, current transformer
The process of corresponding relation set up between harmonic wave and motor noise with the motor noise produced under the Parameter Conditions is：
The parameter of electric machine and motor noise now of the motor of the power supply parameter and its power supply of current transformer are obtained, wherein, supply
Electrical parameter includes voltage, electric current and the frequency of current transformer output, and the parameter of electric machine includes power of motor, rated voltage, the volume of motor
Determine electric current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), wherein,ωk=k ω, θ are Space Angle, and k is the overtone order of the harmonic wave of current transformer output,
ω is the angular frequency of the fundamental wave of current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux
The relation that density-harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；Magnetic flux density-harmonic relationships formula is b (θ, t)=f
(θ,t)λ(θ,t)；
Harmonic wave and motor are obtained according to the relation between the relation and electromagnetic force and motor noise between harmonic wave and electromagnetic force
Corresponding relation between noise.
It should be noted that in the corresponding relation set up between harmonic wave and motor noise, it is necessary first to obtain multigroup change
Motor produces noise under flowing the power supply parameter and the parameter of electric machine and the two Parameter Conditions of device, and the power supply parameter of current transformer is directly true
What kind of harmonic wave that settled preceding current transformer can be produced, and the parameter of electric machine is then to determine which the motor of the type can eliminate in itself
Fractional harmonic (it should be noted that in current transformer is motor power supply process, motor can eliminate fractional harmonic in itself), because
This, it is follow-up the Harmonics elimination eliminated in itself except motor only to be fallen.
Specifically, the parameter of electric machine includes power of motor, rated voltage, rated current, rotating speed, number of poles, the stator slot of motor
Number and rotor slot number, can also be including revolutional slip and motor material characteristic etc..
Power supply parameter includes voltage, electric current and the frequency of current transformer output.
Specifically, current transformer output is to the electric current of motor：
Wherein, φikIt is k subharmonic currents phase angle.
After power supply parameter and the parameter of electric machine is obtained, according to the two parameters obtain air-gap mmf f (θ, t) and air gap magnetic
Lead λ (θ, t), then according to air-gap mmf f (θ, t), air-gap permeance λ (θ, t), magnetic force-magnetic flux density relational expression and magnetic flux density-
The relation that harmonic relationships formula is set up between harmonic wave and electromagnetic force.
Specifically, analysis produces the power source of noise.When current transformer is powered to motor, stator core inner surface is acted on
Power is influenceed by the factor collective effect such as magnetic flux density, air permeability, and the harmonic wave source for producing noise is found out by analysis.Press
According to Marx's Wei law, electromagnetic force p (θ, t) be proportional to magnetic flux density square,
Wherein, ωn=n ω, ωnIt is electromagnetic force frequency, r is Reeb number of times.
After the relation between electromagnetic force and harmonic wave that obtains, then according to the relation and electromagnetic force between harmonic wave and electromagnetic force with
Relation between motor noise obtains the corresponding relation between harmonic wave and motor noise.
A kind of concrete methods of realizing of the above-mentioned corresponding relation set up between harmonic wave and motor noise provided for the application,
The present invention does not limit the corresponding relation how obtained between harmonic wave and motor noise herein, and two can be obtained using other modes
Corresponding relation between person also may be used.
Step S12：Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；
After the corresponding relation between harmonic wave and motor noise is obtained, in just can saving it in control unit, in unsteady flow
Device for motor power when, control unit current power supply parameter is directly obtained from inverter controller, it is necessary to explanation, become
During stream device is powered for motor, current power supply parameter is probably change, but once motor, fixed, the parameter of electric machine is also just solid
It is fixed, same motor is for, current motor parameter here is actually fixed value.
As a kind of preferred embodiment, the current power supply parameter and current motor ginseng when current transformer is powered to motor are obtained
Several processes are：
The current power supply parameter and current motor parameter when current transformer is powered to motor are obtained in real time.
In order to improve Noise measarement precision, current power supply ginseng when current transformer is powered to motor can be in real time obtained here
Number and current motor parameter, to determine currently to produce the harmonic wave of noise in real time, are particularly suited for current transformer power supply parameter not
The application scenarios of disconnected change.
Step S13：The humorous of current generation noise is determined according to current power supply parameter, current motor parameter and corresponding relation
Ripple；
Because the corresponding relation between harmonic wave and motor noise has pre-build, therefore, powered currently
Lookup is directly gone to produce the harmonic wave of the current generation noise of noise after parameter and current motor parameter from default corresponding relation, this
In the harmonic wave of current generation noise be probably one, it is also possible to multiple, particular number is according to filtering out to influence of noise
Big harmonic wave number carrys out comprehensive decision with the parameter of electric machine.
Step S14：Treatment is filtered to the current harmonic wave for producing noise, to eliminate the harmonic wave of current generation noise.
It is determined that after the harmonic wave for currently producing noise, the current harmonic filtration for producing noise can be fallen by wave filter,
Here filtration module can be arranged in current transformer, may also be arranged on outside current transformer, and the present invention is not particularly limited herein,
Determined according to actual conditions.
In actual applications, to reduce control difficulty, the harmonic component larger to noise effect can targetedly be eliminated.Tool
How body controls to be determined according to user's request, and the present invention is not particularly limited herein.
To sum up, the application quantifies harmonic wave to electricity from source in real time according to motor body characteristic and current transformer power supply parameter
The affecting laws of machine noise, larger harmonic wave is influenceed on noise of motor, can realize directional filtering, from current transformer control and electricity
Machine specialty systemizations aspect, motor active noise reduction control is carried out from noise source of generation.
The invention provides a kind of motor active denoising method, including power supply parameter according to current transformer, current transformer are powered
Motor the parameter of electric machine and the Parameter Conditions under the corresponding relation set up between harmonic wave and motor noise of motor noise that produces；
Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；According to current power supply parameter, current motor
Parameter and corresponding relation determine the harmonic wave of current generation noise；Treatment is filtered to the current harmonic wave for producing noise, to eliminate
The harmonic wave of current generation noise.
It can be seen that, the parameter of electric machine and the ginseng of the motor that the present invention powers according to the power supply parameter of current transformer, current transformer in advance
The corresponding relation that the motor noise produced under said conditions is set up between harmonic wave and motor noise, during to motor control, energy
It is enough to determine currently produce the humorous of noise from the corresponding relation for pre-building according to current power supply parameter and current motor parameter
Ripple, is then filtered treatment to the current harmonic wave for producing noise, to filter out the harmonic wave of current generation noise, so as to realize
The harmonic wave is oriented and is accurately eliminated, actively reduce influence of the converter harmonic to motor noise, realize active noise reduction,
Excellent noise reduction effect.
Refer to Fig. 2, a kind of structural representation of motor active noise reduction system that Fig. 2 is provided for the present invention, the system bag
Include：
Corresponding relation building module 1, the parameter of electric machine for the motor of power supply parameter and its power supply according to current transformer is built
Vertical corresponding relation between harmonic wave and motor noise；
Parameter acquisition module 2, for obtaining current power supply parameter and current motor parameter when current transformer is powered to motor；
Harmonic wave determining module 3, for determining current generation according to current power supply parameter, current motor parameter and corresponding relation
The harmonic wave of noise；
Filtration module 4, for being filtered treatment to the current harmonic wave for producing noise, to eliminate the humorous of current generation noise
Ripple.
As a kind of preferred embodiment, the parameter of electric machine of the motor powered according to the power supply parameter of current transformer, current transformer
The process of corresponding relation set up between harmonic wave and motor noise with the motor noise produced under the Parameter Conditions is：
The parameter of electric machine and motor noise now of the motor of the power supply parameter and its power supply of current transformer are obtained, wherein, supply
Electrical parameter includes voltage, electric current and the frequency of current transformer output, and the parameter of electric machine includes power of motor, rated voltage, the volume of motor
Determine electric current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), wherein,ωk=k ω, θ are Space Angle, and k is the overtone order of the harmonic wave of current transformer output,
ω is the angular frequency of the fundamental wave of current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux density-
The relation that harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；Magnetic flux density-harmonic relationships formula is b (θ, t)=f
(θ,t)λ(θ,t)；
Harmonic wave and motor are obtained according to the relation between the relation and electromagnetic force and motor noise between harmonic wave and electromagnetic force
Corresponding relation between noise.
As a kind of preferred embodiment, when parameter acquisition module 2 is powered specifically for obtaining current transformer in real time to motor
Current power supply parameter and current motor parameter.
The introduction of the motor active noise reduction system provided for the present invention refer to above method embodiment, and the present invention is herein
Repeat no more.
It should be noted that in this manual, term " including ", "comprising" or its any other variant be intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (6)
1. a kind of motor active denoising method, it is characterised in that including：
The electricity produced under the parameter of electric machine and the Parameter Conditions of the motor powered according to the power supply parameter of current transformer, the current transformer
The corresponding relation that machine noise is set up between harmonic wave and motor noise；
Obtain the current power supply parameter and current motor parameter when current transformer is powered to motor；
The harmonic wave of current generation noise is determined according to the current power supply parameter, current motor parameter and the corresponding relation；
Treatment is filtered to the current harmonic wave for producing noise, to eliminate the harmonic wave of the current generation noise.
2. motor active denoising method as claimed in claim 1, it is characterised in that the power supply parameter according to current transformer,
The parameter of electric machine of the motor that the current transformer is powered sets up harmonic wave and motor noise with the motor noise of generation under the Parameter Conditions
Between the process of corresponding relation be：
The parameter of electric machine and motor noise now of the power supply parameter of the current transformer and its motor of power supply are obtained, wherein, institute
State voltage of the power supply parameter including current transformer output, electric current and frequency, the parameter of electric machine include motor power of motor,
Rated voltage, rated current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to the power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), wherein,ωk=k ω, θ are Space Angle, and k is the harmonic wave of the harmonic wave of the current transformer output
Number, ω is the angular frequency of the fundamental wave of the current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to the air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux density-
The relation that harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, the electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；The magnetic flux density-harmonic relationships formula be b (θ, t)
=f (θ, t) λ (θ, t)；
Obtained according to the relation between the relation between the harmonic wave and the electromagnetic force and the electromagnetic force and the motor noise
Corresponding relation between the harmonic wave and the motor noise.
3. motor active denoising method as claimed in claim 1, it is characterised in that when the acquisition current transformer is powered to motor
Current power supply parameter and the process of current motor parameter be：
The current power supply parameter and current motor parameter when current transformer is powered to motor are obtained in real time.
4. a kind of motor active noise reduction system, it is characterised in that including：
Corresponding relation building module, the parameter of electric machine for the motor of power supply parameter and its power supply according to current transformer sets up harmonic wave
Corresponding relation between motor noise；
Parameter acquisition module, for obtaining current power supply parameter and current motor parameter when current transformer is powered to motor；
Harmonic wave determining module, it is current for being determined according to the current power supply parameter, current motor parameter and the corresponding relation
Produce the harmonic wave of noise；
Filtration module, for being filtered treatment to the current harmonic wave for producing noise, to eliminate the current generation noise
Harmonic wave.
5. motor active noise reduction system as claimed in claim 4, it is characterised in that the power supply parameter according to current transformer,
The parameter of electric machine of the motor that the current transformer is powered sets up harmonic wave and motor noise with the motor noise of generation under the Parameter Conditions
Between the process of corresponding relation be：
The parameter of electric machine and motor noise now of the power supply parameter of the current transformer and its motor of power supply are obtained, wherein, institute
State voltage of the power supply parameter including current transformer output, electric current and frequency, the parameter of electric machine include motor power of motor,
Rated voltage, rated current, rotating speed, number of poles, number of stator slots and rotor slot number；
According to the power supply parameter and the parameter of electric machine obtain air-gap mmf f (θ, t) and air-gap permeance λ (θ, t), wherein,ωk=k ω, θ are Space Angle, and k is the harmonic wave of the harmonic wave of the current transformer output
Number, ω is the angular frequency of the fundamental wave of the current transformer output, FkIt is magnetomotive force amplitude,It is phase angle；
According to the air-gap mmf f (θ, t), air-gap permeance λ (θ, t), electromagnetic force-magnetic flux density relational expression and magnetic flux density-
The relation that harmonic relationships formula is set up between harmonic wave and electromagnetic force；Wherein, the electromagnetic force-magnetic flux density relational expression isμ0It is air permeability, (θ t) is magnetic flux density to b；The magnetic flux density-harmonic relationships formula be b (θ, t)
=f (θ, t) λ (θ, t)；
Obtained according to the relation between the relation between the harmonic wave and the electromagnetic force and the electromagnetic force and the motor noise
Corresponding relation between the harmonic wave and the motor noise.
6. motor active noise reduction system as claimed in claim 4, it is characterised in that the parameter acquisition module is specifically for reality
When obtain current power supply parameter and current motor parameter of the current transformer when being powered to motor.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109470937A (en) * | 2018-10-11 | 2019-03-15 | 全球能源互联网研究院有限公司 | A kind of reactor noise evaluation and noise optimization method, apparatus |
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