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 PDFInfo
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- 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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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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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
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.
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| CN113014151A (en) * | 2019-12-18 | 2021-06-22 | 珠海格力电器股份有限公司 | Brushless direct current motor control method and device, brushless direct current motor and electric appliance |
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