CN106301132A - Permagnetic synchronous motor power calculation algorithms, device, refrigerator controller and refrigerator - Google Patents

Permagnetic synchronous motor power calculation algorithms, device, refrigerator controller and refrigerator Download PDF

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Publication number
CN106301132A
CN106301132A CN201610925769.3A CN201610925769A CN106301132A CN 106301132 A CN106301132 A CN 106301132A CN 201610925769 A CN201610925769 A CN 201610925769A CN 106301132 A CN106301132 A CN 106301132A
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motor
constant
machine
phase electricity
electricity flow
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CN106301132B (en
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韩利利
王长恺
苏勇雪
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Gree Electric Appliances Inc of Zhuhai
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/14Estimation or adaptation of machine parameters, e.g. flux, current or voltage
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34Testing dynamo-electric machines

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The embodiment of the present invention proposes a kind of permagnetic synchronous motor power calculation algorithms, including: obtain motor current three-phase electricity flow valuve;Motor speed is estimated according to current three-phase electricity flow valuve;Calculate the power of motor according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine, constant of the machine is relevant to air-gap flux amount and torque constant.The embodiment of the present invention only just can calculate the power of motor by obtaining the three-phase current of motor, therefore need not increase extra power measurement module, effectively reduces the manufacturing cost of permagnetic synchronous motor, refrigerator controller and refrigerator.

Description

Permagnetic synchronous motor power calculation algorithms, device, refrigerator controller and refrigerator
Technical field
The present embodiments relate to motor power calculation technology, particularly relate to a kind of permagnetic synchronous motor power calculation skill Art.
Background technology
Permagnetic synchronous motor is the synchronous motor being produced synchronous rotary magnetic field by permanent magnet excitation.When stator side is passed through three-phase Symmetrical current, owing to threephase stator differs 120 ° on locus, so threephase stator electric current produces rotary magnetic in space , rotor is moved by electromagnetic force in rotating excitation field.
Under certain abnormal conditions, it may appear that permagnetic synchronous motor runs on higher-wattage, now electric current is relatively big, but does not has Have and reach overcurrent protection value, if longtime running is in this state, may result in the damage of permagnetic synchronous motor, controller each unit device The part life-span is greatly lowered.Therefore permagnetic synchronous motor requires by power setting within the specific limits at present, this is accomplished by finding one Method, it is possible to accurately calculate power.
At present, power calculation algorithms is by increasing power measurement module, and permagnetic synchronous motor power line is same to permanent magnetism Before step motor is powered, first pass through power measurement module and carry out relevant data acquisition calculating.Owing to needs increase power measurement mould Block, adds the manufacturing cost of permagnetic synchronous motor.
Summary of the invention
The embodiment of the present invention proposes a kind of permagnetic synchronous motor power calculation algorithms, device, refrigerator controller and refrigerator, with Effectively reduce the manufacturing cost of permagnetic synchronous motor, refrigerator controller and refrigerator.
First aspect, embodiments provides a kind of permagnetic synchronous motor power calculation algorithms, including:
Obtain motor current three-phase electricity flow valuve;
Motor speed is estimated according to current three-phase electricity flow valuve;
The power of motor, constant of the machine and gas is calculated according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine Gap magnetic flux and torque constant are correlated with.
Second aspect, embodiments provides a kind of permagnetic synchronous motor output computation device, including:
Acquisition module, for obtaining the motor current three-phase electricity flow valuve under predetermined power;
Estimation block, for estimating motor speed according to current three-phase electricity flow valuve;
Computing module, for calculating the power of motor according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine, Constant of the machine is relevant to air-gap flux amount and torque constant.
The third aspect, embodiments provides a kind of refrigerator controller, and the permanent magnetism provided including above-described embodiment is same Step motor power calculation device.
Fourth aspect, embodiments provides a kind of refrigerator, provides including permagnetic synchronous motor and above-described embodiment Refrigerator controller, refrigerator controller control permagnetic synchronous motor operating.
Embodiments provide a kind of permagnetic synchronous motor power calculation algorithms, device, refrigerator controller and refrigerator, The method only just can calculate the power of motor by obtaining the three-phase current of motor, can be without increasing extra measurement In the case of module, calculate the actual power of motor accurately, it is possible to realize, under different operating modes, motor is carried out real-time merit Rate is protected.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in the embodiment of the present invention being described below The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to implements according to the present invention The content of example and these accompanying drawings obtain other accompanying drawing.
Fig. 1 is the schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention one provides;
Fig. 2 is the permagnetic synchronous motor control program block diagram of the refrigerator that the embodiment of the present invention one provides;
Fig. 3 is the schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention two provides;
Fig. 4 is the schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention three provides;
Fig. 5 is the schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention four provides;
Fig. 6 is the schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention five provides;
Fig. 7 is the structural representation of the permagnetic synchronous motor output computation device that the embodiment of the present invention six provides;
Fig. 8 is the structural representation of the refrigerator that the embodiment of the present invention eight provides.
Detailed description of the invention
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.It is understood that this place is retouched The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just Part related to the present invention is illustrate only rather than entire infrastructure in description, accompanying drawing.
Embodiment one
Fig. 1 is the schematic flow sheet of a kind of permagnetic synchronous motor power calculation algorithms that the embodiment of the present invention one provides, this Embodiment is applicable to by using the three-phase current of permagnetic synchronous motor to calculate the situation of permanent magnet synchronous electric acc power, the method The permagnetic synchronous motor output computation device that can be provided by the embodiment of the present invention performs, this device can use software and/or The mode of hardware realizes.
As it is shown in figure 1, permagnetic synchronous motor power calculation algorithms, including:
S110, acquisition motor current three-phase electricity flow valuve.
Permagnetic synchronous motor includes stator and rotor two large divisions, and the three-phase current of stator is respectively Ia、IbAnd Ic.Three-phase The acquisition of electric current can be realized by sample circuit, and sample circuit can be made up of sampling resistor, it is also possible to by other circuit structures Become, it may also be necessary to include amplifying circuit, be amplified processing to the signal after sampling.The directly three-phase current signal of sampling Or the three-phase current signal through amplifying can also pass through A/D converter part, is converted into digital signal.
S120, according to current three-phase electricity flow valuve estimate motor speed.
Fig. 2 is the permagnetic synchronous motor control program block diagram of refrigerator, as in figure 2 it is shown, estimate according to current three-phase electricity flow valuve Motor speed specifically may include that three-phase current Ia、IbAnd IcThe I under biphase static alpha-beta coordinate system is obtained through CLARK conversionα And Iβ, to IαAnd IβCarry out PARK conversion and obtain biphase rotation d-q coordinate system IdAnd Iq.Further according to IdAnd Iq, utilize counter electromotive force Method estimates motor speed W.
S130, according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine calculate motor power, constant of the machine Relevant to air-gap flux amount and torque constant.
As in figure 2 it is shown, exciting currentWherein IdAnd IqIt it is the value calculated in S120.Further according to motor Power P=A × IS× W calculates the output of permagnetic synchronous motor.Wherein, P is output power of motor, and W is to estimate in S120 The estimation motor speed calculated, ISFor the aforementioned exciting current calculated, A is constant of the machine, and constant of the machine can be electrical machinery plant The value that family is given, it is also possible to be the value after measured calculating.
Embodiments providing a kind of permagnetic synchronous motor power calculation algorithms, the method is only by obtaining motor Three-phase current just can calculate the power of motor, can count accurately in the case of without increasing extra measurement module Calculate the actual power of motor, it is possible to realize, under different operating modes, motor is carried out realtime power protection.
In Fig. 2, also include the control program of motor speed, including receiving rotating speed of target W*, through the PI ratio of band feedback Integral controller generates target exciting current Is*, target exciting current Is* the mesh under Sine and cosine transform obtains d-q coordinate system Mark Id(Id *) and target Iq(Iq *), Id *And Iq *Obtain under d-q coordinate system after PI proportional and integral controller respectively through band feedback Target Vd(Vd *) and target Vq(Vq *), Vd *And Vq *Target V under PARK inverse transformation obtains alpha-beta coordinate systemα(Vα *) and mesh Mark Vβ(Vβ *), Vα *And Vβ *Through SVPWM, (Space Vector Pulse Width Modulation, space vector pulse width is adjusted System) control inverter, and then control permagnetic synchronous motor.
Embodiment two
The schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that Fig. 3 provides for the embodiment of the present invention two.This enforcement Example is optimized based on above-described embodiment, in the present embodiment, before obtaining described motor current three-phase electricity flow valuve, also Comprise the steps: to obtain described motor reference three-phase electricity flow valuve under predetermined power and with reference to motor speed;According to presetting Power, reference three-phase electricity flow valuve and reference motor speed calculate described constant of the machine.
Accordingly, the permagnetic synchronous motor power calculation algorithms that the present embodiment is provided, including:
S210, obtains motor reference three-phase electricity flow valuve under predetermined power and with reference to motor speed.
In the present embodiment, before to permagnetic synchronous motor power calculation, need to calculate the constant of the machine of motor.To carry For calculating the constant of the machine of permanent magnet synchronous electric acc power.For different permagnetic synchronous motors, need every motor is all calculated Its corresponding constant of the machine.This parameter of electric machine can be calculated by power, three-phase electricity flow valuve and motor speed under experiment condition Draw.In laboratory environments, the three-phase electricity flow valuve under predetermined power and motor speed can be measured accurately.Exemplary, Can carry out loading so that the output of motor reaches the power protection value of setting to motor by means of testboard, the most default Power, measures the reference three-phase electricity flow valuve of now motor, i.e. with reference to three-phase with the instrument of the test electric current such as oscillograph or power instrument Current value, motor speed measured by the instrument measuring rotating speed with tachometer etc., i.e. with reference to motor speed.
S220, according to predetermined power, with reference to three-phase electricity flow valuve and with reference to motor speed calculate described constant of the machine.
By electromagnetic power formula: P=Te× Ω formula (1)
Wherein TeFor electromagnetic torque, Ω is the mechanical angle speed of rotor, and this electromagnetic power is that the electromagnetism of motor turns The output of the mechanical output that mechanical load is made by square, i.e. motor.
By Formula of Electromagnetic: Te=CT×φ×IsFormula (2)
Wherein, CTFor torque constant, φ is air-gap flux amount, IsFor exciting current.
Again
Wherein, W is electromechanics rotating speed, and unit is r/min, and formula (2) and formula (3) are substituted into formula (1) can obtainMake constant of the machineDraw electromagnetic power P=A × IS× W, due to motor Loss power is less, the output of motor can be approximately electromagnetic power.That is,
Power of motor P=A × IS× W formula (4)
Motor predetermined power value, reference three-phase electricity flow valuve and reference motor speed value now is substituted into formula (4) just can count Calculate constant of the machine A value now.
S230, acquisition motor current three-phase electricity flow valuve.
S240, according to current three-phase electricity flow valuve estimate motor speed.
S250, according to current three-phase electricity flow valuve, estimation motor speed and correspondence constant of the machine calculate motor power.
The present embodiment tests the constant of the machine A value drawn, for motor by increasing under the power protection value set Power calculation, can improve the degree of accuracy of motor power calculation.
It should be noted that step: obtain described motor reference three-phase electricity flow valuve under predetermined power and with reference to motor Rotating speed;According to predetermined power, with reference to three-phase electricity flow valuve with reference to the motor speed described constant of the machine of calculating.Can be limited to obtain Before described motor current three-phase electricity flow valuve, it is possible to be limited to according to predetermined power, turn with reference to three-phase electricity flow valuve and reference motor Speed calculates the either step before described constant of the machine.
Embodiment three
The schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that Fig. 4 provides for the embodiment of the present invention three.This enforcement Example is optimized based on above-described embodiment, in the present embodiment, by described for described acquisition motor ginseng under predetermined power Examine three-phase electricity flow valuve to be specifically optimized for: obtain multiple references three that the described motor multiple preset rotation speed under predetermined power are corresponding Phase current values;By described concrete according to predetermined power, reference three-phase electricity flow valuve and the reference motor speed described constant of the machine of calculating It is optimized for: calculate many according to corresponding multiple of predetermined power, multiple preset rotation speed with reference to three-phase electricity flow valuves and multiple preset rotation speed Multiple constants of the machine that individual preset rotation speed is corresponding;And will be according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine meter Calculate the power of motor, be specifically optimized for: choose the constant of the machine of correspondence according to motor estimation rotating speed;According to current three-phase current The constant of the machine of value, estimation motor speed and correspondence calculates the power of motor.
Accordingly, the permagnetic synchronous motor power calculation algorithms that the present embodiment is provided, including:
S310, obtain corresponding multiple with reference to three-phase electricity flow valuves of the described motor multiple preset rotation speed under predetermined power.
Owing to constant of the machine is relevant to air-gap flux amount and torque constant, under different rotating speeds, constant of the machine can produce Corresponding change.In the present embodiment, before to permagnetic synchronous motor power calculation, need to calculate multiple preset rotation speed corresponding Multiple constants of the machine, with provide calculate permanent magnet synchronous electric acc power constant of the machine.This parameter of electric machine can be at experiment condition Under, calculated by power, three-phase electricity flow valuve and motor speed and draw.In laboratory environments, can measure accurately in default merit Three-phase electricity flow valuve under rate.Exemplary, can carry out loading so that the output of motor reaches to motor by means of testboard To the power protection value set, i.e. predetermined power, and set motor respectively with different preset rotation speed rotations, by oscillograph or merit The three-phase electricity flow valuve of motor corresponding to each preset rotation speed measured by the instrument of the test electric current such as rate instrument, i.e. with reference to three-phase electricity flow valuve.
S320, according to corresponding multiple of predetermined power, multiple preset rotation speed with reference to three-phase electricity flow valuves with multiple preset rotation speed Calculate multiple constants of the machine that multiple preset rotation speed is corresponding.
Motor predetermined power value, reference three-phase electricity flow valuve and preset rotation speed value now is substituted into formula (4) just can calculate Constant of the machine A value now.Measurement and calculating to carrying out respectively under multiple preset rotation speed with reference to three-phase electricity flow valuve just can obtain Value to multiple constant of the machine A corresponding to multiple preset rotation speed.
S330, acquisition motor current three-phase electricity flow valuve.
S340, according to current three-phase electricity flow valuve estimate motor speed.
S350, according to motor estimation rotating speed choose correspondence constant of the machine.
Motor is estimated, and the multiple preset rotation speed in rotating speed and S310 compare, immediate preset rotation speed can be chosen The value of corresponding constant of the machine A is as the constant of the machine value of power calculation.
S360, according to current three-phase electricity flow valuve, estimation motor speed and correspondence constant of the machine calculate motor power.
Constant of the machine value step S350 chosen substitutes into motor power calculation formula (4), draws the power of motor.
The present embodiment, by under multiple preset rotation speed, tests, under the power protection value of setting, the multiple constants of the machine drawn A value, chooses the value power calculation for motor of suitable constant of the machine A, can carry further further according to estimation motor speed The degree of accuracy of high motor power calculation.
It should be noted that step: obtain the reference three that the described motor multiple preset rotation speed under predetermined power are corresponding Phase current values;Calculate with reference to three-phase electricity flow valuves and multiple preset rotation speed according to corresponding multiple of predetermined power, multiple preset rotation speed The constant of the machine that multiple preset rotation speed are corresponding.Before can being limited to obtain motor current three-phase electricity flow valuve, it is possible to be limited to root According to predetermined power, calculate the either step before described constant of the machine with reference to three-phase electricity flow valuve and preset rotation speed.
Alternatively, in above-mentioned permagnetic synchronous motor power calculation algorithms, preset rotation speed is in the range of 1200~4200r/ min.This range of speeds covers permagnetic synchronous motor working speed under normal circumstances, carries out constant of the machine the most within the range The measurement of value, reduces the workload of measurement.
Alternatively, in above-mentioned permagnetic synchronous motor power calculation algorithms, preset rotation speed is 180 × M+1200r/min, wherein M is the integer more than or equal to 1.By measuring a constant of the machine value every 180r/min, further reduce the work of measurement Amount.
Embodiment four
The schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that Fig. 5 provides for the embodiment of the present invention four.This enforcement Example is optimized based on above-described embodiment, in the present embodiment, by described for described acquisition motor ginseng under predetermined power Examine three-phase electricity flow valuve to be specifically optimized for: obtain multiple reference three-phases that described motor multiple predeterminated voltages under predetermined power are corresponding Current value and reference motor speed;By described according to predetermined power, with reference to three-phase electricity flow valuve with reference to described in motor speed calculating Constant of the machine is specifically optimized for: calculate multiple presetting according to predetermined power, multiple reference three-phase electricity flow valuve with reference to motor speed Multiple constants of the machine that voltage is corresponding;And by described according to described current three-phase electricity flow valuve, estimation motor speed and constant of the machine Calculate the power of described motor, be optimized for further: obtain motor current voltage value, choose the electricity of correspondence according to current voltage value Machine constant;Constant of the machine according to current three-phase electricity flow valuve, estimation motor speed and correspondence calculates the power of described motor.
Accordingly, the permagnetic synchronous motor power calculation algorithms that the present embodiment is provided, including:
Multiple reference three-phase electricity flow valuves and reference that S410, acquisition motor multiple predeterminated voltages under predetermined power are corresponding are electric Machine rotating speed.
Owing to constant of the machine is relevant to motor input voltage, for different input voltages, constant of the machine can produce accordingly Change.In the present embodiment, before to permagnetic synchronous motor power calculation, need to calculate multiple predeterminated voltage corresponding many Individual constant of the machine, to provide the constant of the machine calculating permanent magnet synchronous electric acc power.This parameter of electric machine can be logical under experiment condition Overpower, three-phase electricity flow valuve and motor speed calculate and draw.In laboratory environments, can measure accurately under predetermined power Three-phase electricity flow valuve and motor speed.
S420, according to predetermined power, multiple with reference to three-phase electricity flow valuve and with reference to motor speed calculate multiple predeterminated voltages pair The multiple constants of the machine answered.
S430, acquisition motor current voltage value.
The acquisition of current voltage value can be realized by sample circuit, and sample circuit can be made up of sampling resistor, it is possible to To be made up of other circuit.
S440, according to current voltage value choose correspondence constant of the machine.
Multiple predeterminated voltages in the current voltage obtained in S430 and S410 are compared, can choose immediate The value of the constant of the machine A that predeterminated voltage is corresponding is as the constant of the machine value of power calculation.
S450, acquisition motor current three-phase electricity flow valuve
S460, according to current three-phase electricity flow valuve estimate motor speed
S470, according to current three-phase electricity flow valuve, estimation motor speed and correspondence constant of the machine calculate motor power.
Constant of the machine value step S440 chosen substitutes into motor power calculation formula, draws the power of motor.
The present embodiment, by measuring the multiple reference three-phase electricity flow valuves under multiple predeterminated voltages and with reference to motor speed, obtains Multiple constants of the machine that multiple predeterminated voltages are corresponding, are possible to prevent change in voltage to cause electric current to change, so that power Value of calculation error is less, the most also allows for motor power calculation method and can be applicable to those spread of voltages and voltage is relatively low Area.
It should be noted that step: obtain multiple reference three-phases that motor multiple predeterminated voltages under predetermined power are corresponding Current value and reference motor speed;According to predetermined power, multiple reference three-phase electricity flow valuve and calculate multiple pre-with reference to motor speed If multiple constants of the machine that voltage is corresponding.Before can being limited to obtain motor current voltage value, it is possible to be limited to according to current Magnitude of voltage chooses the either step before the constant of the machine of correspondence.Step: obtain current voltage value;Choose according to current voltage value Corresponding constant of the machine.Before can being limited to obtain motor current three-phase electricity flow valuve, it is possible to be limited to according to predetermined power, ginseng Examine three-phase electricity flow valuve and preset rotation speed calculates the either step before described constant of the machine.
Alternatively, in above-mentioned permagnetic synchronous motor power calculation algorithms, multiple predeterminated voltages include: 1.1 times of rated voltages, 0.85 times of rated voltage or 0.73 times of rated voltage.Obtain three constants of the machine by measuring aforementioned three predeterminated voltages, reduce The workload that constant of the machine is measured.
Embodiment five
The schematic flow sheet of the permagnetic synchronous motor power calculation algorithms that Fig. 6 provides for the embodiment of the present invention five.This enforcement Example is optimized based on above-described embodiment, in the present embodiment, by described for described acquisition motor ginseng under predetermined power Examine three-phase electricity flow valuve to be specifically optimized for: obtain described motor multiple preset rotation speed under predetermined power, multiple predeterminated voltage corresponding Many groups with reference to three-phase electricity flow valuves;By described according to predetermined power, with reference to three-phase electricity flow valuve with reference to described in motor speed calculating Constant of the machine has and is optimized for: obtain multiple presetting according to predetermined power, many groups turn with reference to three-phase electricity flow valuve, multiple preset rotation speed Many groups constant of the machine that fast and multiple predeterminated voltage is corresponding.
Accordingly, the permagnetic synchronous motor power calculation algorithms that the present embodiment is provided, including:
S510, obtain the many groups reference that multiple preset rotation speed are corresponding under predetermined power with multiple predeterminated voltages of described motor Three-phase electricity flow valuve.
S520, according to predetermined power, many groups with reference to three-phase electricity flow valuves and multiple preset rotation speed obtain multiple preset rotation speed and Many groups constant of the machine that multiple predeterminated voltages are corresponding.
S530, acquisition motor current voltage value.
S540, according to current voltage value choose correspondence constant of the machine group.
S550, acquisition motor current three-phase electricity flow valuve.
S560, according to current three-phase electricity flow valuve estimate motor speed.
S570, according to motor estimation rotating speed and constant of the machine group choose correspondence constant of the machine.
S580, according to current three-phase electricity flow valuve, estimation motor speed and correspondence constant of the machine calculate motor power.
The present embodiment, by measuring the reference three-phase electricity flow valuve of multiple preset rotation speed under multiple predeterminated voltages, obtains organizing electricity more Machine constant, expands the range of application of power calculation algorithms further, and the power calculation both having prevented voltage to occur is abnormal, increases again Add the accuracy of power calculation.
Embodiment six
Embodiments providing a kind of permagnetic synchronous motor output computation device, refer to Fig. 7, it is that the present invention is real Execute a kind of permagnetic synchronous motor output computation device schematic diagram that example six provides.
Described permagnetic synchronous motor output computation device, including:
Acquisition module 61, for obtaining the motor current three-phase electricity flow valuve under predetermined power;
Estimation block 62, for estimating motor speed according to current three-phase electricity flow valuve;
Computing module 63, for calculating the merit of motor according to current three-phase electricity flow valuve, estimation motor speed and constant of the machine Rate, constant of the machine is relevant to air-gap flux amount and torque constant.
Embodiments providing a kind of permagnetic synchronous motor output computation device, this device is only by obtaining motor Three-phase current just can calculate the power of motor, can count accurately in the case of without increasing extra measurement module Calculate the actual power of motor, it is possible to realize, under different operating modes, motor is carried out realtime power protection.
Alternatively, above-mentioned permagnetic synchronous motor output computation device also includes:
Reference data acquisition module 65, for obtaining motor reference three-phase electricity flow valuve under predetermined power and with reference to motor Rotating speed;Constant of the machine computing module 64, for according to predetermined power, with reference to three-phase electricity flow valuve with reference to described in motor speed calculating Constant of the machine.
Alternatively, in above-mentioned permagnetic synchronous motor output computation device, reference data acquisition module is used for:
Obtain multiple reference three-phase electricity flow valuves that the motor multiple preset rotation speed under predetermined power are corresponding;
Accordingly, constant of the machine computing module is used for:
Calculate many according to corresponding multiple of predetermined power, multiple preset rotation speed with reference to three-phase electricity flow valuves and multiple preset rotation speed Multiple constants of the machine that individual preset rotation speed is corresponding;
Computing module is used for:
The constant of the machine of correspondence is chosen according to motor estimation rotating speed;
Constant of the machine according to current three-phase electricity flow valuve, estimation motor speed and correspondence calculates the power of motor.
Alternatively, in above-mentioned permagnetic synchronous motor output computation device, preset rotation speed is in the range of 1200~4200r/ min。
Alternatively, in above-mentioned permagnetic synchronous motor output computation device, preset rotation speed is 1200+180M r/min, wherein M For the integer more than or equal to 1.
Alternatively, in above-mentioned permagnetic synchronous motor output computation device, reference data acquisition module is used for:
Obtain multiple reference three-phase electricity flow valuves corresponding to motor multiple predeterminated voltages under predetermined power and turn with reference to motor Speed;Accordingly, constant of the machine computing module is used for: according to predetermined power, multiple reference three-phase electricity flow valuve with reference to motor speed Calculate multiple constants of the machine that multiple predeterminated voltage is corresponding;Computing module is used for: choose the motor of correspondence according to current voltage value Constant;Constant of the machine according to current three-phase electricity flow valuve, estimation motor speed and correspondence calculates the power of described motor.
Alternatively, in above-mentioned permagnetic synchronous motor output computation device, multiple predeterminated voltages include: 1.1 times of rated voltages, 0.85 times of rated voltage or 0.73 times of rated voltage.
The permagnetic synchronous motor output computation device that the embodiment of the present invention is provided can be used for performing the present invention and arbitrarily implements The permagnetic synchronous motor power calculation algorithms that example provides, possesses corresponding functional module, it is achieved identical beneficial effect.
Embodiment seven
Embodiments provide a kind of refrigerator controller, it is characterised in that according to above-mentioned permanent magnet synchronous electric acc power Computational methods carry out power calculation.
Embodiment eight
Embodiments providing a kind of refrigerator, refer to Fig. 8, it is a kind of refrigerator that the embodiment of the present invention eight provides Schematic diagram.
A kind of refrigerator 71, can include permagnetic synchronous motor 712, it is also possible to include above-mentioned refrigerator controller 711, refrigerator control Device 711 processed controls permagnetic synchronous motor 712 and operates.
Embodiments provide a kind of refrigerator controller and refrigerator, by using permagnetic synchronous motor power calculation side Method, only just can calculate the power of motor by obtaining the three-phase current of motor, therefore need not increase extra power and surveys Amount module, while realizing the realtime power of accurately calculating motor, effectively reduces the manufacture of refrigerator controller and refrigerator Cost.
Obviously, it will be understood by those skilled in the art that each module or each step of the invention described above can be by as above institutes The equipment stated is implemented.Alternatively, the embodiment of the present invention can realize by the executable program of computer installation, such that it is able to will They storages are performed by processor in the storage device, and described program can be stored in a kind of computer-readable recording medium In, storage medium mentioned above can be read only memory, disk or CD etc.;Or they are fabricated to respectively each collection Become circuit module, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, this The bright combination being not restricted to any specific hardware and software.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious change, Readjust and substitute without departing from protection scope of the present invention.Therefore, although by above example, the present invention is carried out It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.

Claims (16)

1. a permagnetic synchronous motor power calculation algorithms, it is characterised in that including:
Obtain described motor current three-phase electricity flow valuve;
Motor speed is estimated according to described current three-phase electricity flow valuve;
The power of described motor, described motor is calculated according to described current three-phase electricity flow valuve, estimation motor speed and constant of the machine Constant is relevant to air-gap flux amount and torque constant.
Method the most according to claim 1, it is characterised in that described method also includes:
Obtain described motor reference three-phase electricity flow valuve under predetermined power and with reference to motor speed;
According to predetermined power, with reference to three-phase electricity flow valuve with reference to the motor speed described constant of the machine of calculating.
Method the most according to claim 2, it is characterised in that described acquisition described motor reference three under predetermined power Phase current values, including:
Obtain multiple reference three-phase electricity flow valuves that the described motor multiple preset rotation speed under predetermined power are corresponding;
Accordingly, described according to predetermined power, with reference to three-phase electricity flow valuve with reference to the motor speed described constant of the machine of calculating, bag Include:
Calculate multiple pre-according to corresponding multiple of predetermined power, multiple preset rotation speed with reference to three-phase electricity flow valuves and multiple preset rotation speed If multiple constants of the machine that rotating speed is corresponding;
The described power calculating described motor according to described current three-phase electricity flow valuve, estimation motor speed and constant of the machine, including:
The constant of the machine of correspondence is chosen according to described motor estimation rotating speed;
Constant of the machine according to described current three-phase electricity flow valuve, estimation motor speed and described correspondence calculates the merit of described motor Rate.
Method the most according to claim 3, it is characterised in that described preset rotation speed is in the range of 1200~4200r/min.
Method the most according to claim 4, it is characterised in that described preset rotation speed is 180 × M+1200r/min, wherein M For the integer more than or equal to 1.
Method the most according to claim 2, it is characterised in that described acquisition described motor reference three under predetermined power Phase current values, including:
Obtain multiple reference three-phase electricity flow valuves corresponding to described motor multiple predeterminated voltages under predetermined power and turn with reference to motor Speed;
Accordingly, described obtain described constant of the machine according to predetermined power, with reference to three-phase electricity flow valuve with reference to motor speed, bag Include:
According to predetermined power, multiple multiple electricity corresponding with reference to the motor speed multiple predeterminated voltages of calculating with reference to three-phase electricity flow valuve Machine constant;
The described power calculating described motor according to described current three-phase electricity flow valuve, estimation motor speed and constant of the machine, including:
Obtain described motor current voltage value, choose the constant of the machine of correspondence according to described current voltage value;
Constant of the machine according to described current three-phase electricity flow valuve, estimation motor speed and described correspondence calculates the merit of described motor Rate.
Method the most according to claim 6, it is characterised in that the plurality of predeterminated voltage includes:
1.1 times of rated voltages, 0.85 times of rated voltage or 0.73 times of rated voltage.
8. a permagnetic synchronous motor output computation device, it is characterised in that including:
Acquisition module, for obtaining the described motor current three-phase electricity flow valuve under predetermined power;
Estimation block, for estimating motor speed according to described current three-phase electricity flow valuve;
Computing module, for calculating described motor according to described current three-phase electricity flow valuve, estimation motor speed and constant of the machine Power, described constant of the machine is relevant to air-gap flux amount and torque constant.
Device the most according to claim 8, it is characterised in that described device also includes:
Reference data acquisition module, for obtaining described motor reference three-phase electricity flow valuve under predetermined power and turning with reference to motor Speed;
Constant of the machine computing module, for according to predetermined power, with reference to three-phase electricity flow valuve with reference to the motor speed described electricity of calculating Machine constant.
Device the most according to claim 9, it is characterised in that described in obtain reference data acquisition module for:
Obtain multiple reference three-phase electricity flow valuves that the described motor multiple preset rotation speed under predetermined power are corresponding;
Accordingly, constant of the machine computing module is used for:
Calculate multiple pre-according to corresponding multiple of predetermined power, multiple preset rotation speed with reference to three-phase electricity flow valuves and multiple preset rotation speed If multiple constants of the machine that rotating speed is corresponding;
Described computing module is used for:
The constant of the machine of correspondence is chosen according to described motor estimation rotating speed;
Constant of the machine according to described current three-phase electricity flow valuve, estimation motor speed and described correspondence calculates the merit of described motor Rate.
11. devices according to claim 10, it is characterised in that described preset rotation speed is in the range of 1200~4200r/ min。
12. devices according to claim 11, it is characterised in that described preset rotation speed is 1200+180Mr/min, wherein M For the integer more than or equal to 1.
13. devices according to claim 9, it is characterised in that described reference data acquisition module is used for:
Obtain multiple reference three-phase electricity flow valuves corresponding to described motor multiple predeterminated voltages under predetermined power and turn with reference to motor Speed;
Accordingly, described constant of the machine computing module is used for:
According to predetermined power, multiple multiple electricity corresponding with reference to the motor speed multiple predeterminated voltages of calculating with reference to three-phase electricity flow valuve Machine constant;
Described computing module is used for:
The constant of the machine of correspondence is chosen according to described current voltage value;
Constant of the machine according to described current three-phase electricity flow valuve, estimation motor speed and described correspondence calculates the merit of described motor Rate.
14. devices according to claim 13, it is characterised in that the plurality of predeterminated voltage includes:
1.1 times of rated voltages, 0.85 times of rated voltage or 0.73 times of rated voltage.
15. 1 kinds of refrigerator controllers, it is characterised in that include permagnetic synchronous motor merit according to any one of claim 8~14 Rate calculates device.
16. 1 kinds of refrigerators, including permagnetic synchronous motor, it is characterised in that also include: the refrigerator described in claim 15 controls Device, described refrigerator controller is used for controlling the operating of described permagnetic synchronous motor.
CN201610925769.3A 2016-10-24 2016-10-24 Permanent magnet synchronous motor power calculation method and device, refrigerator controller and refrigerator Active CN106301132B (en)

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