CN109724329A - The method inhibited for the cooler compressor fluctuation of speed - Google Patents
The method inhibited for the cooler compressor fluctuation of speed Download PDFInfo
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Abstract
The invention discloses a kind of methods inhibited for the cooler compressor fluctuation of speed, including the process according to real-time angular speed and Torque Control compressor；The process that compressor is controlled according to real-time angular speed includes: that axis error is filtered, and obtains angular rate compensation amount；Compensated angular speed output quantity is obtained according to angular rate compensation amount；Real-time angular speed is corrected according to the compensated angular speed output quantity and controls compressor；Process according to Torque Control compressor includes: the difference for calculating target angular velocity undulate quantity and feeding back angular speed amount, obtains the first angular speed difference；The first angular speed difference is input to velocity loop regulator, obtains output torque；Torque compensation amount is obtained according to the first angular speed difference；Compensated output torque is obtained according to the torque compensation amount and the output torque and controls compressor.With the application of the invention, can be improved the validity that compressor rotary speed fluctuation inhibits.
Description
Technical field
The invention belongs to motor control technology fields, specifically, be to be related to compressor control technology, more specifically,
It is the method for being related to inhibiting for the cooler compressor fluctuation of speed.
Background technique
The compressor that air conditioner uses at runtime, by itself working principle of the air conditioner as load and control technology
Influence easily cause the biggish fluctuation of speed so that the load torque of compressor is extremely unstable, compressor operation is uneven
Surely.And compressor operation it is unstable will lead to entire air-conditioner system fluctuation of service, cause a variety of adverse effects.And it is unstable
Operation can also generate biggish operation noise, be not able to satisfy coherent noise standard requirements, influence air conditioner comfort.This
Kind phenomenon is particularly acute in single-rotor compressor.
Although the prior art there is also the method that compressor rotary speed controls, it is inadequate to fluctuation of speed inhibitory effect
Ideal cannot fundamentally solve the problems, such as that compressor rotary speed fluctuates.
Summary of the invention
The object of the present invention is to provide a kind of methods inhibited for the cooler compressor fluctuation of speed, improve to compressor
Revolving speed carries out the validity of fluctuation inhibition.
For achieving the above object, the present invention, which adopts the following technical solutions, is achieved:
A method of inhibit for the cooler compressor fluctuation of speed, the method includes being controlled according to real-time angular speed
The process of compressor and process according to Torque Control compressor；
The process of the real-time angular speed control compressor of the basis includes:
Obtain the axis error Δ θ of the physical location of reflection compressor drum and the deviation of estimated position；
The axis error Δ θ is filtered, the amendment axis error Δ after at least filtering out the fluctuation of part axis error is obtained
θ ' and angular rate compensation amount P_out corresponding with the amendment axis error Δ θ '；
By the output angle of angular rate compensation amount P_out compensation to phaselocked loop adjuster in compressor control phaselocked loop
In speed Δ ω _ PLL, compensated angular speed output quantity Δ ω ', Δ ω '=P_out+ Δ ω _ PLL are obtained；
The real-time angular velocity omega 1 of compressor control is corrected according to the compensated angular speed output quantity Δ ω,
Compressor is controlled according to revised real-time angular velocity omega 1；
The process according to Torque Control compressor includes:
The difference of target angular velocity undulate quantity and the feedback angular speed amount is calculated, the first angular speed difference is obtained；It is described anti-
Present the output angular velocity of flip-flop P_DC and the phaselocked loop adjuster that angular speed amount is the angular rate compensation amount P_out
The sum of Δ ω _ PLL；
The first angular speed difference is input to the speed ring in compressor control speed ring as input quantity to adjust
Device obtains the output torque of the velocity loop regulator；Meanwhile being compensated based on the first angular speed difference implementation capacity square, it obtains
Obtain the corresponding torque compensation amount of subangle velocity perturbation in the middle part of the first angular speed difference；
By torque compensation amount compensation into the output torque of the velocity loop regulator, compensated power output is obtained
Square；
Compressor of air conditioner is controlled according to the compensated output torque.
Compared with prior art, the advantages and positive effects of the present invention are: cooler compressor revolving speed provided by the invention
Suppressing method is fluctuated, is fluctuated by the axis error Δ θ of the deviation of physical location and estimated position to reflection compressor drum
It filters out, will at least filter out the corresponding angular rate compensation amount compensation of the amendment axis error after part axis error fluctuates and adjusted to phaselocked loop
In the output angular velocity of device, compensated angular speed output quantity is obtained, further according to compensated angular speed output quantity to compressor
Real-time angular speed correct, when controlling with revised real-time angular speed compressor, enable to rotating speed of target
Variation and phase make the operation of compressor tend to be steady close to the variation and phase of actual speed；Moreover, because axis misses
The fluctuation of difference is the front end direct factor for causing velocity perturbation, therefore, by filtering out in front end to the fluctuation of axis error, is reduced
The cyclic fluctuation of axis error can be realized and more directly, rapidly inhibit to the fluctuation of speed, improve the effective of revolving speed control
Property.In addition, by being inputted the difference of the output angular velocity of phaselocked loop adjuster and target angular velocity undulate quantity as input quantity
Into velocity loop regulator, the output torque of velocity loop regulator is obtained, meanwhile, the output angular velocity based on phaselocked loop adjuster
Torque compensation amount is obtained with the difference of target angular velocity undulate quantity, then, velocity loop regulator is arrived into the compensation of torque compensation amount
In output torque, compensated output torque is obtained, compensated output torque reduces the difference of motor torque and loading moment
Torque can be substantially reduced compressor rotary speed fluctuation, so that compressor when controlling compressor according to compensated output torque
It operates more stable；And compressor operation is stablized, moreover it is possible to achieve the effect that energy conservation, vibration damping.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Detailed description of the invention
Fig. 1 is the part process of the method one embodiment inhibited based on the present invention for the cooler compressor fluctuation of speed
Figure；
Fig. 2 is another part of the method one embodiment inhibited based on the present invention for the cooler compressor fluctuation of speed
Flow chart；
Fig. 3 is a control block diagram based on Fig. 1 and Fig. 2 embodiment of the method；
Fig. 4 is the logic diagram of Fig. 3 axis fluctuating error one specific example of filtering algorithm；
Fig. 5 is the logic diagram of one specific example of torque compensation algorithm in Fig. 3.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples,
Invention is further described in detail.
Fig. 1 and Fig. 2 respectively illustrates one reality of method inhibited based on the present invention for the cooler compressor fluctuation of speed
Apply the partial process view of example.Specifically, the fluctuation of speed suppressing method of the embodiment includes that there are two processes: one is basis
The process of real-time angular speed control compressor, flow chart are as shown in Figure 1；One is according to the process of Torque Control compressor, stream
Journey figure is as shown in Figure 2.Below based on Fig. 1 and Fig. 2, in combination with a control block diagram shown in Fig. 3, the two mistakes are described respectively
The specific implementation of journey.
The part of method one embodiment inhibited based on the present invention for compressor rotary speed fluctuation shown in Figure 1
Flow chart, the flow chart that compressor is specifically controlled according to real-time angular speed, it includes following step which, which uses,
Process realize according to real-time angular speed control compressor:
Step 11: obtaining the axis error Δ θ of the physical location of reflection compressor drum and the deviation of estimated position.
In compressor control, the phase of compressor drum can be locked by phaselocked loop (PLL) control technology,
It is set to be locked in target phase, the control block diagram of phaselocked loop is as shown in Figure 3.In the prior art, include in compressor phaselocked loop
Phaselocked loop adjuster, generally proportional and integral controller are shown in the K of Fig. 3P_PLLAnd KI_PLL/S.Axis error Δ θ is as phaselocked loop tune
An input for saving device uses, specifically, be by axis error Δ θ and target angle undulate quantity (0) work as shown in Figure 3 is poor,
Difference is input to phaselocked loop adjuster, and the output of phaselocked loop adjuster is output angular velocity Δ ω _ PLL.It is adjusted based on phaselocked loop
Output angular velocity Δ ω _ PLL of device, phaselocked loop will export the real-time angular velocity omega 1 of compressor control, utilize the real-time angle speed
Spend control of the realization of ω 1 to rotor-position.
The axis error Δ θ for reflecting the physical location of compressor drum and the deviation of estimated position, can pass through following formula
It is calculated:
In formula,WithRespectively the d shaft voltage given value of compressor and q shaft voltage given value, IdAnd IqRespectively
The real-time d shaft current and real-time q shaft current of compressor, r*For the motor resistance of compressor,For the q axle inductance of compressor, ω1
For the real-time angular frequency of compressor.In each parameter, Id、IqAnd ω1By detection means real-time detection in the prior art, remaining
Parameter value is given value.
Step 12: axis error Δ θ being filtered, the amendment axis error after at least filtering out the fluctuation of part axis error is obtained
Δθ′。
An input due to axis error as phaselocked loop, influences the real-time angular speed of the compressor of phaselocked loop output.Such as
The fluctuation of fruit axis error is big, it will and the real-time angular speed for causing phaselocked loop to export is unstable, so that rotor locking phase is unstable, Jin Erhui
Compressor is caused the failures such as overcurrent, step-out occur.
After step 11 obtains axis error Δ θ, it is filtered, at least filters out part ripple components, is obtained extremely
Amendment axis error Δ θ ' after filtering out the fluctuation of part axis error less.The method for making to be filtered to axis error, can use existing
Technology is realized, preferred to be filtered, referring to the description of subsequent preferred embodiments.
Step 13: according to amendment axis error Δ θ ' acquisition angular rate compensation amount P_out.
The step can be realized by the way of obtaining angular speed according to angle in the prior art.Preferred processing side
Formula, referring to the description of subsequent preferred embodiments.
The realization of above-mentioned steps 12 and step 13, is reflected in the control block diagram of Fig. 3, is to filter out calculation using axis error fluctuation
Method obtains angular rate compensation amount P_out.
Step 14: by angular rate compensation amount P_out compensation in compressor control phaselocked loop phaselocked loop adjuster it is defeated
In angular velocity Δ ω _ PLL, compensated angular speed output quantity Δ ω is obtained.Specifically, compensated angular speed output quantity Δ
ω '=P_out+ Δ ω _ PLL.
Step 15: being corrected according to real-time angular velocity omega 1 of the compensated angular speed output quantity to compressor control, root
Compressor is controlled according to revised real-time angular velocity omega 1.
Specifically, it is 0 corresponding with the target angular velocity undulate quantity in following speed ring control, determines real-time angle
The method of speed are as follows: referring to Fig. 3, compensated angular speed output quantity Δ ω ' is added with angular speed instruction ω * _ in, output pair
The real-time angular velocity omega 1 of compressor control.Wherein, angular speed instruction ω * _ in is compressor control system to fixed angular speed
The determination method of value, the value of given angular speed instruction ω * _ in is realized using the prior art.Using the target angle of speed ring
Speed wave momentum is 0, instructs ω * _ in true based on output angular velocity Δ ω _ PLL of phaselocked loop adjuster and given angular speed
Fixed real-time angular speed, so that compressor control is more accurate and stablizes.
Method one embodiment inhibited based on the present invention for the cooler compressor fluctuation of speed shown in Figure 2
Partial process view, specifically according to the flow chart of Torque Control compressor, the embodiment is using including following step
Process realize according to Torque Control compressor:
Step 21: calculating target angular velocity undulate quantity and feed back the difference of angular speed amount, obtain the first angular speed difference.Feedback
Angular speed amount be angular rate compensation amount P_out flip-flop P_DC and phaselocked loop adjuster output angular velocity Δ ω _ PLL it
With.
In compressor control, the revolving speed of compressor drum can be controlled by speed ring (ASR) control technology,
It is close to setting speed.Shown in block diagram referring to Fig. 3, speed ring includes velocity loop regulator, generally proportional integration tune
Device is saved, sees the K of Fig. 3P_ASRAnd KI_ASR/S。
In this step, by the output angle of the flip-flop P_DC of angular rate compensation amount P_out and phaselocked loop adjuster speed
Degree Δ ω _ PLL is used as the input of speed ring to use.Specifically, the flip-flop P_ of angular rate compensation amount P_out is extracted
DC calculates the sum of flip-flop P_DC and output angular velocity Δ ω _ PLL of phaselocked loop adjuster, obtains feedback angular speed amount Δ
ω 1, Δ ω 1=P_DC+ Δ ω _ PLL.Wherein, the flip-flop P_DC of angular rate compensation amount P_out is extracted, it can be using existing
There is the technology for extracting flip-flop to realize, for example, using low-pass filter extract the direct current of angular rate compensation amount P_out at
Divide P_DC.
Then, it calculates target angular velocity undulate quantity and feeds back the difference of angular speed amount Δ ω 1, the difference of the two is determined as first
Angular speed difference DELTA ω 2.Wherein, target angular velocity undulate quantity is desired angular velocity fluctuation amount, is known input quantity.As
Preferred embodiment, in this embodiment, target angular velocity undulate quantity are 0.
Step 22: the speed ring tune being input to using the first angular speed difference as input quantity in compressor control speed ring
Device is saved, the output torque of velocity loop regulator is obtained；Meanwhile being compensated based on the first angular speed difference implementation capacity square, obtain first
The corresponding torque compensation amount of subangle velocity perturbation in the middle part of angular speed difference.
Input of the first angular speed difference DELTA ω 2 as velocity loop regulator influences the output torque of speed ring output.?
In the embodiment, using torque compensation algorithm, torque compensation is executed based on the first angular speed difference DELTA ω 2, obtains first jiao of speed
Spend the corresponding torque compensation amount τ _ out of segment angle velocity perturbation in difference DELTA ω 2.It, can be using existing for torque compensation algorithm
There are all possibility schemes existing for technology, as long as guaranteeing that obtained torque compensation amount τ _ out is and the first angular speed difference DELTA
Segment angle velocity perturbation is corresponding in ω 2.Preferred torque compensation algorithm, referring to the description of subsequent preferred embodiments.
Step 23: by the compensation of torque compensation amount into the output torque of velocity loop regulator, obtaining compensated power output
Square.
Specifically, being to be added torque compensation amount τ _ out with output torque τ _ ASR of velocity loop regulator, mended
Output torque τ after repayingM: τM=τ _ out+ τ _ ASR.
Step 24: compressor of air conditioner is controlled according to compensated output torque.Specific control process refers to the prior art.
Using the method for above-mentioned Fig. 1 and Fig. 2 embodiment constituted, realizes and speed ring and phaselocked loop are executed to compressor
Double -loop control.Also, in phase lock control, pass through the deviation to the physical location and estimated position for reflecting compressor drum
Axis error Δ θ makees fluctuation and filters out, and will at least filter out the corresponding angular rate compensation amount of amendment axis error after part axis error fluctuates
In the output angular velocity for compensating phaselocked loop adjuster, compensated angular speed output quantity is obtained, further according to compensated angle speed
Degree output quantity corrects the real-time angular speed of compressor, when being controlled with revised real-time angular speed compressor, energy
Enough so that the variation and phase of rotating speed of target make the operation of compressor tend to be flat close to the variation and phase of actual speed
Surely.Moreover, because the fluctuation of axis error is the front end direct factor for causing velocity perturbation, therefore, by front end to axis error
Fluctuation filter out, reduce the cyclic fluctuation of axis error, can be realized to the fluctuation of speed more directly, rapidly inhibit, improve
The validity of revolving speed control.In the control of speed ring, by the output angular velocity of phaselocked loop adjuster and target angular velocity wave
The difference of momentum is input in velocity loop regulator as input quantity, obtains the output torque of velocity loop regulator；Meanwhile it being based on
The output angular velocity of phaselocked loop adjuster and the difference of target angular velocity undulate quantity obtain torque compensation amount and then mend torque
The amount of repaying is compensated into the output torque of velocity loop regulator, obtains compensated output torque, compensated output torque can
Reduce the poor torque of motor torque and loading moment；So, when controlling compressor according to compensated output torque, Neng Gouxian
It writes and reduces compressor rotary speed fluctuation, the operation of compressor is made to tend to be steady.In addition, phaselocked loop adjuster and velocity loop regulator are made
For dynamic adjustment adjuster, after controlling compressor according to compensated output torque, feedback arrives phaselocked loop adjuster again
Axis error reduces, and the fluctuation of the output angular velocity of phaselocked loop adjuster also correspondingly reduces, then by the output of phaselocked loop adjuster
Angular speed is input to the front end of the velocity loop regulator in compressor control speed ring, final first angular speed as input quantity
The fluctuation of difference also reduces, and is also capable of the output torque of stabilized speed ring adjuster, further reduces the revolving speed wave of compressor
It is dynamic, improve the control effect of speed ring.And compressor runs smoothly, moreover it is possible to reach the technical effect of energy conservation, vibration damping, further
Improve compressor runnability.
In some other embodiment, axis error Δ θ is filtered, after acquisition at least filters out the fluctuation of part axis error
Amendment axis error Δ θ ', specifically include: axis error Δ θ be filtered, at least filter out the first harmonic ingredient in Δ θ,
Obtain the amendment axis error Δ θ ' at least filtering out first harmonic ingredient.A kind of embodiment more preferably, to axis error Δ θ
It is filtered, including filtering out first harmonic ingredient and second harmonic ingredient in Δ θ, acquisition filters out first harmonic ingredient and two
The amendment axis error Δ θ ' of subharmonic ingredient.By filtering out the first harmonic ingredient in Δ θ, or filter out first harmonic ingredient and
Second harmonic ingredient can filter out most of ripple components in Δ θ, and calculation amount is moderate, and it is fast to filter out speed.
The logic diagram that Fig. 4 shows Fig. 3 axis fluctuating error one specific example of filtering algorithm is specifically to obtain
Obtain angle speed corresponding with the amendment axis error Δ θ ' after the first harmonic ingredient and second harmonic ingredient filtered out in axis error Δ θ
Spend the logic diagram of a specific example of compensation rate P_out.Specific acquisition process is as follows:
Firstly, axis error Δ θ is made Fourier expansion, axis error Δ θ is obtained about mechanical angle θmFunction representation
Formula.It is specific as follows:
In formula, Δ θDCFor the DC component of axis error, θd_n=θpeak_ncosφn, θq_n=θpeak_nsinφn,
Δθpeak_nFor nth harmonic axis error fluctuation amplitude, θm1、θm2For first harmonic mechanical angle.And second harmonic mechanical angle θm2It indicates
Are as follows: θm2=2 θm1。
Then, first harmonic ingredient and second harmonic ingredient are extracted from function expression, filter out one using integrator
Subharmonic ingredient and second harmonic ingredient, acquisition filter out result.
Specifically, low pass filtering method or integration method can be used, is extracted from above-mentioned function expression primary humorous
Wave component and second harmonic ingredient.Specific in Fig. 4, by function expression respectively with cos θm1With cos θm2After multiplication, through too low
Bandpass filter filtering takes integral mean in the period by integrator, extracts the d axis component of the first harmonic of axis error Δ θ
With the d axis component of second harmonic；By function expression respectively with-sin θm1With-sin θm2After multiplication, filtered by low-pass filter
Wave takes integral mean in the period by integrator, extracts the q axis component and second harmonic of the first harmonic of axis error Δ θ
Q axis component.Then, by the d axis component of the d axis component of first harmonic, q axis component and second harmonic, q axis component respectively with 0
Make poor, input to integrator KI_PMake integral in/S and filters out processing, acquisition filters out filtering out for first harmonic ingredient and second harmonic ingredient
As a result, and filtering out result and becoming angular speed.
Subsequently, will respectively filter out result and make inverse Fourier transform, obtain and filter out first harmonic ingredient and second harmonic at
The corresponding angular rate compensation amount P_out of amendment axis error Δ θ ' divided.Specifically, the d axis component of first harmonic is filtered out
The result that filters out for the q axis component for filtering out result and filtering out first harmonic does the sum of the result after inverse Fourier transform respectively, is formed
Filter out the corresponding angular rate compensation amount P_out1 of amendment axis error of first harmonic ingredient；Filter out the d axis component of second harmonic
The result that filters out for the q axis component for filtering out result and filtering out second harmonic does the sum of the result after inverse Fourier transform respectively, is formed
Filter out the corresponding angular rate compensation amount P_out2 of amendment axis error of second harmonic ingredient；The sum of two angular rate compensation amounts, shape
At angular rate compensation amount P_out=corresponding with the amendment axis error Δ θ ' for filtering out first harmonic ingredient and second harmonic ingredient
P_out1+P_ou2。
It preferably, can also be by increasing control of the enabled switch realization to harmonic filtration.Specifically,
In Fig. 4 block diagram, Gain_1, Gain_2 are enabled switch, are used to determine whether unlatching/closing filtering algorithm function.In Gain_
1, the enabled switch state of Gain_2 is in the case that unlatching filters out first harmonic and filters out second harmonic function, to obtain and filter out
The corresponding angular rate compensation amount P_out=P_out1+ of the amendment axis error Δ θ ' of first harmonic ingredient and second harmonic ingredient
P_ou2.If the enabled switch state of Gain_1, Gain_2 are to close the case where filtering out first harmonic and filtering out second harmonic function
Under, entire axis error filter function will close, and be unable to output angular velocity compensation rate P_out.If one of them enabled switch shape
State is to open filtering algorithm function, another enabled switch is to close filtering algorithm function, then the angular rate compensation amount P_ obtained
Out be only filter out first harmonic angular rate compensation amount (Gain_1 enable switch state for open filter out first harmonic function,
It is to close the case where filtering out second harmonic function that Gain_2, which enables switch state) or be only the angular speed benefit for filtering out second harmonic
The amount of repaying (Gain_1 enable switch state be close filter out first harmonic function, Gain_2 enable switch state be open filter out two
The case where subharmonic function).
In the embodiment for only filtering out first harmonic ingredient, it can be directly used and extract first harmonic ingredient in Fig. 4, filter out
The process of first harmonic ingredient.It certainly, also can also be by increasing enabled open in the embodiment for only filtering out first harmonic ingredient
The control realized and filtered out to first harmonic is closed, in addition specific implementation is not repeated herein referring also to Fig. 4.
Fig. 5 shows the logic diagram of one specific example of torque compensation algorithm in Fig. 3, is acquisition first specifically
The logic of a specific example of torque compensation amount corresponding to first harmonic ingredient and second harmonic ingredient in angular speed difference
Block diagram.Referring to Fig. 5, which obtains first harmonic ingredient and second harmonic in the first angular speed difference using following methods
Torque compensation amount corresponding to ingredient:
Firstly, the first angular speed difference DELTA ω 2 is made Fourier expansion, obtains the first angular speed difference DELTA ω 2 and close
In mechanical angle θmFunction expression.The process can be realized using the prior art, be not described in detail here.
Then, the d axis of the d axis correlative of first harmonic, q axis correlative and second harmonic is obtained from function expression
Correlative, q axis correlative.Specifically, by function expression respectively with cos θm1With-sin θm1It is multiplied, obtains the first angular velocity difference
It is worth the d axis correlative and q axis correlative of first harmonic in Δ ω 2；By function expression respectively with cos θm2With-sin θm2It is multiplied,
Obtain the d axis correlative and q axis correlative of second harmonic in the first angular speed difference DELTA ω 2.Wherein, θm1For Fourier space
First harmonic mechanical angle in the function expression of expansion, θm2For the second harmonic in the function expression of Fourier expansion
Mechanical angle, and θm2=2 θm1。
Subsequently, the d axis correlative of the d axis correlative of first harmonic, q axis correlative and second harmonic, q axis is related
Amount is respectively converted into d axle power square and q axle power square.
Specific to the embodiment, preferably, torque is converted to using two steps:
It is to utilize integrator 1/T firstI.S it is converted, TIFor the time constant of integrator, by the d axis phase of first harmonic
Guan Liang, q axis correlative and the d axis correlative of second harmonic, q axis correlative are converted into the d axis starting force of first harmonic respectively
Square Δ τ 'd1, first harmonic q axis initial torque Δ τ 'q1, second harmonic d axis initial torque Δ τ 'd2With the q axis of second harmonic
Initial torque Δ τ 'q2。
Then, d axis initial torque and q axis initial torque are subjected to ratio adjustment respectively, ratio result adjusted determines
For required d axle power square and q axle power square.Specifically, according to d shafting number f (ωd1) to the d axis initial torque Δ of first harmonic
τ′d1Make ratio adjustment, obtains the d axle power square Δ τ of first harmonicd1.D shafting number f (ωd1) according to the d axis component of first harmonic
ωd1With the d axis initial torque Δ τ ' of first harmonicd1It determines.Wherein, the d axis component ω of first harmonicd1It is according to first harmonic
D axis correlative determine, specifically, can be by the d axis correlative of first harmonic by low-pass filter filtering after obtain
?.According to q shafting number f (ωq1) to the q axis initial torque Δ τ ' of first harmonicq1Make ratio adjustment, obtains the q axis of first harmonic
Torque Δ τq1.Q shafting number f (ωq1) according to the q axis component ω of first harmonicq1With the q axis initial torque Δ τ ' of first harmonicq1Really
It is fixed.Wherein, the q axis component ω of first harmonicq1Be according to the q axis correlative of first harmonic determine, specifically can be by
The q axis correlative of first harmonic obtains after being filtered by low-pass filter.According to d shafting number f (ωd2) to the d axis of second harmonic
Initial torque Δ τ 'd2Make ratio adjustment, obtains the d axle power square Δ τ of second harmonicd2.D shafting number f (ωd2) according to second harmonic
D axis component ωd2With the d axis initial torque Δ τ ' of second harmonicd2It determines.Wherein, the d axis component ω of second harmonicd2It is basis
What the d axis correlative of second harmonic determined, it specifically can be and filter the d axis correlative of second harmonic by low-pass filter
It is obtained after wave.According to q shafting number f (ωq2) to the q axis initial torque Δ τ ' of second harmonicd2Make ratio adjustment, obtains secondary humorous
The q axle power square Δ τ of waveq2.Q shafting number f (ωq2) according to the q axis component ω of second harmonicq2With the q axis initial torque of second harmonic
Δτ′q2It determines.Wherein, the q axis component ω of second harmonicq2It is to be determined according to the q axis correlative of second harmonic, specifically
It can be and obtained after filtering the q axis correlative of second harmonic by low-pass filter.It, can also be in some other embodiment
D axis correlative and q axis correlative are directly only converted to by corresponding d axle power square and q axle power square by integrator, and without than
Example adjustment.
Finally, torque is made inverse Fourier transform, torque compensation amount is obtained.Specifically, by the d axle power square of first harmonic and
Q axle power square respectively with cos (θm1+θshift-K1) and-sin (θm1+θshift-K1) result after making inverse Fourier transform that is multiplied summation,
Be formed as first harmonic in the first angular speed difference DELTA ω 2 and fluctuate corresponding torque compensation amount τ _ out1；By the d axis of second harmonic
Torque and q axle power square respectively with cos (θm2+θshift-K2) and-sin (θm2+θshift-K2) be multiplied and make the result after inverse Fourier transform
Summation is formed as second harmonic in the first angular speed difference DELTA ω 2 and fluctuates corresponding torque compensation amount τ _ out2.Two torques are mended
The sum of the amount of repaying forms torque compensation amount τ _ out=τ _ out1+ τ corresponding with first harmonic ingredient and second harmonic ingredient
out2.Wherein, θshift-K1And θshift-K2The respectively phase compensation angle at the phase compensation angle of first harmonic and second harmonic, two
The angle number at a phase compensation angle is determined according to the angular speed phase in given angular speed instruction.By way of phase compensation
Torque compensation amount is obtained, the torque compensation amount compensated output torque obtained is based on, torque phase is enabled to occur
Offset, and deviated to compressor load torque, and then reduce the poor torque of motor torque and loading moment, it realizes to compression
The machine fluctuation of speed inhibits.
It preferably, can also be by increasing control of the enabled switch realization to torque compensation.Specifically,
In Fig. 5 block diagram, Gain_1, Gain_2 are enabled switch, are used to determine whether unlatching/close moment backoff algorithm function.?
The enabled switch state of Gain_1, Gain_2 are the case where opening first harmonic torque compensation and second harmonic torque compensation function
Under, obtain first harmonic ingredient and the corresponding torque compensation amount of second harmonic ingredient: τ _ out=τ _ out1+ τ _ out2.If
The enabled switch state of Gain_1, Gain_2 are the case where closing first harmonic torque compensation and second harmonic torque compensation function
Under, entire torque compensation algorithm function will close, and torque compensation amount is 0.If one of them enabled switch state is opening force
Square backoff algorithm function, another enabled switch are close moment backoff algorithm function, then the torque compensation amount obtained is only the
(it is to open first harmonic that Gain_1 enables switch state to the corresponding torque compensation amount of first harmonic ingredient in one angular speed difference
It is the case where closing second harmonic torque compensation function that torque compensation function, Gain_2, which enable switch state) or only first
(it is to close first harmonic power that Gain_1 enables switch state to the corresponding torque compensation amount of second harmonic ingredient in angular speed difference
It is the case where opening second harmonic torque compensation function that square compensation function, Gain_2, which enable switch state).
In the embodiment for only obtaining the corresponding torque compensation amount of first harmonic ingredient, it can be directly used in Fig. 5 and obtain
The process of the corresponding torque compensation amount of first harmonic ingredient；Certainly, it can also also be realized by increasing enabled switch to primary humorous
The control of wave torque compensation, specific implementation are not repeated additionally herein referring also to Fig. 5.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of method inhibited for the cooler compressor fluctuation of speed, which is characterized in that the method includes according in real time
Angular speed controls the process of compressor and the process according to Torque Control compressor；
The process of the real-time angular speed control compressor of the basis includes:
Obtain the axis error Δ θ of the physical location of reflection compressor drum and the deviation of estimated position；
The axis error Δ θ is filtered, obtain at least filter out part axis error fluctuation after amendment axis error Δ θ ' with
And angular rate compensation amount P_out corresponding with the amendment axis error Δ θ '；
By the output angular velocity of angular rate compensation amount P_out compensation to phaselocked loop adjuster in compressor control phaselocked loop
In Δ ω _ PLL, compensated angular speed output quantity Δ ω ', Δ ω '=P_out+ Δ ω _ PLL are obtained；
The real-time angular velocity omega 1 of compressor control is corrected according to the compensated angular speed output quantity Δ ω ', according to
Revised real-time angular velocity omega 1 controls compressor；
The process according to Torque Control compressor includes:
It calculates target angular velocity undulate quantity and feeds back the difference of angular speed amount, obtain the first angular speed difference；The feedback angular speed
Amount is the flip-flop P_DC of the angular rate compensation amount P_out and output angular velocity Δ ω _ PLL of the phaselocked loop adjuster
The sum of；
It is input to the velocity loop regulator in compressor control speed ring using the first angular speed difference as input quantity, is obtained
Obtain the output torque of the velocity loop regulator；Meanwhile being compensated based on the first angular speed difference implementation capacity square, described in acquisition
The corresponding torque compensation amount of subangle velocity perturbation in the middle part of first angular speed difference；
By torque compensation amount compensation into the output torque of the velocity loop regulator, compensated output torque is obtained；
Compressor of air conditioner is controlled according to the compensated output torque.
2. being obtained extremely the method according to claim 1, wherein described be filtered the axis error Δ θ
Amendment axis error Δ θ ' after filtering out the fluctuation of part axis error less, specifically includes:
The axis error Δ θ is filtered, the first harmonic ingredient in Δ θ is at least filtered out, acquisition at least filters out primary humorous
The amendment axis error Δ θ ' of wave component.
3. according to the method described in claim 2, further including it is characterized in that, described be filtered the axis error Δ θ
The second harmonic ingredient in Δ θ is filtered out, the amendment axis error Δ θ ' for filtering out first harmonic ingredient and second harmonic ingredient is obtained.
4. according to the method described in claim 2, it is characterized in that, filtering out repairing for first harmonic ingredient using the acquisition of following processes
Positive axis error delta θ ' and angular rate compensation amount P_out corresponding with the amendment axis error Δ θ ':
The axis error Δ θ is made into Fourier expansion, obtains axis error about mechanical angle θmFunction expression；
The first harmonic ingredient that axis error Δ θ is extracted from the function expression is filtered out described primary humorous using integrator
Wave component, acquisition filter out result；
The result that filters out is made into inverse Fourier transform, is obtained corresponding with the amendment axis error Δ θ ' of first harmonic ingredient is filtered out
Angular rate compensation amount P_out.
5. according to the method described in claim 4, it is characterized in that, described extract axis error Δ from the function expression
The first harmonic ingredient of θ, specifically includes:
Using low pass filtering method or integration method, the first harmonic ingredient of axis error Δ θ is extracted from the function expression.
6. the method according to any one of claims 1 to 5, which is characterized in that described to be based on first angular velocity difference
Value executes torque compensation, obtains the corresponding torque compensation amount of subangle velocity perturbation in the middle part of the first angular speed difference, specific to wrap
It includes:
The first angular speed difference is made into Fourier expansion, is obtained about mechanical angle θmFunction expression；
By the function expression respectively with cos θmnWith-sin θmnIt is multiplied, obtains the nth harmonic of the first angular speed difference
D axis correlative and q axis correlative；θmnFor the mechanical angle of nth harmonic；
The d axis correlative of the nth harmonic and q axis correlative are respectively converted into the d axle power square and q axle power of the nth harmonic
Square；
By the d axle power square of the nth harmonic and q axle power square respectively with cos (θmn+θshift-Kn) and-sin (θmn+θshift-Kn) be multiplied
Make inverse Fourier transform, obtain the torque compensation amount of the nth harmonic, is determined as subangle speed in the middle part of the first angular speed difference
Degree fluctuates corresponding torque compensation amount；θshift-KnFor the phase compensation angle of nth harmonic, the phase compensation angle is according to given angle
Angular speed phase in speed command determines.
7. according to the method described in claim 6, it is characterized in that, described by the d axis correlative of the nth harmonic and q axis phase
The d axle power square and q axle power square for being respectively converted into the nth harmonic are measured in pass, specifically include:
At the beginning of the d axis correlative of the nth harmonic and q axis correlative are respectively converted into the d axis of the nth harmonic using integrator
Beginning torque and q axis initial torque；
The d axis initial torque and the q axis initial torque to the nth harmonic carry out ratio adjustment, ratio adjustment respectively
Result afterwards is determined as the d axle power square and q axle power square of the nth harmonic.
8. the method according to the description of claim 7 is characterized in that the d axis initial torque to the nth harmonic and
The q axis initial torque carries out ratio adjustment respectively, comprising:
Ratio adjustment is carried out according to the d axis initial torque of the d shafting number to the nth harmonic, according to q shafting number to the n
The q axis initial torque of subharmonic carries out ratio adjustment；
The d shafting number determines according to the d axis component of the nth harmonic and the d axis initial torque, the q shafting number according to
The q axis component of the nth harmonic and the q axis initial torque determine；The d axis component and q axis component of the nth harmonic distinguish root
It is determined according to the d axis correlative and q axis correlative of the nth harmonic.
9. the method according to claim 1, wherein the target angular velocity undulate quantity is 0；It is described according to
Compensated angular speed output quantity Δ ω ' corrects the real-time angular velocity omega 1 of compressor control, according to revised real-time
Angular velocity omega 1 controls compressor, specifically includes: the compensated angular speed output quantity Δ ω ' and given angular speed are referred to
It enables and being added, the result of addition is determined as the revised real-time angular velocity omega 1, according to the revised real-time angular velocity omega
1 control compressor.
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| CN112879297A (en) * | 2021-01-28 | 2021-06-01 | 青岛海尔空调器有限总公司 | Control method of air conditioner compressor and air conditioner |
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| CN103967794A (en) * | 2013-02-05 | 2014-08-06 | 广东美的制冷设备有限公司 | Vibration compensation method for single-rotor compressor and controller |
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