CN109314477A - Motor drive, the freezing cycle device and motor driving method for having the motor drive - Google Patents
Motor drive, the freezing cycle device and motor driving method for having the motor drive Download PDFInfo
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- CN109314477A CN109314477A CN201780038464.3A CN201780038464A CN109314477A CN 109314477 A CN109314477 A CN 109314477A CN 201780038464 A CN201780038464 A CN 201780038464A CN 109314477 A CN109314477 A CN 109314477A
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- motor
- mentioned
- revolving speed
- torque
- amplitude
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
- H02P21/26—Rotor flux based control
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention provides the motor drive etc. of the inhibition for the load vibration that can get both and the reduction of motor losses.Motor drive (50) has based at least one party in the revolving speed and load torque of the motor (M) linked with compressor (11) the control unit (51) of the variation permission amplitude for the revolving speed for adjusting motor (M).Thereby, it is possible to continuously adjusted according to the operating condition of motor (M) make motor (M) output torque and compressor (11) the consistent direct torque of load torque action degree and the electric current constant control for independently making the output torque of motor (M) constant with the variation of load torque action degree.
Description
Technical field
The present invention relates to motor drives of drive motor etc..
Background technique
Known rotary compressor, reciprocating compressor generate biggish cogging in the compression process of refrigerant.
As the technology of the vibration generated with such cogging, noise is inhibited, for example, being recorded as follows in patent document 1: so that
The mode that the periodical cogging of the difference of the load torque (pulsating torque) of output torque and compressor as motor is zero
Control motor.
In the technology described in patent document 1, although being able to suppress the vibration etc. of compressor, due to becoming with torque
Dynamic, the peak value for flowing to the electric current of motor significantly changes, thus has the increase this case for leading to loss.Therefore, as reduction
The technology of motor losses, for example, being recorded as follows in patent document 2: keeping to constant the peak value of motor current.
Existing technical literature
Patent document
Patent document 1: No. 4221307 bulletins of Japanese Patent No.
Patent document 2: No. 4958431 bulletins of Japanese Patent No.
Summary of the invention
Problems to be solved by the invention
As described above, in the technology described in patent document 1, although being able to suppress the vibration etc. of compressor, causing
The increase of motor losses.On the other hand, in the technology described in patent document 2, although motor losses can be reduced, there is pressure
The larger situation of the vibration of contracting machine.That is, the inhibition of the vibration of the compressor as " load " and the reduction of motor losses
Relationship as tradeoff (trade-off).
Therefore, the issue of the present invention is to provide the motors of can the get both inhibition of load vibration and the reduction of motor losses
Driving device etc..
Solution for solving the problem
In order to solve above-mentioned problem, it is a feature of the present invention that revolving speed and load based on the motor linked with load
At least one party in torque allows amplitude to adjust the variation of revolving speed of said motor.
The effect of invention is as follows.
In accordance with the invention it is possible to provide the motor driving dress of the inhibition for the load vibration that can get both and the reduction of motor losses
It sets.
Detailed description of the invention
Fig. 1 is the explanatory diagram for having the air conditioner of motor drive of first embodiment of the invention.
Fig. 2 is the structure chart for having the air conditioner of motor drive of first embodiment of the invention.
Fig. 3 is the structure chart for the control unit that the motor drive of first embodiment of the invention has.
Fig. 4 is shown in direct torque, load torque, the motor of the compressor after making motor turn around with mechanical angle rotation
Output torque, the explanatory diagram of revolving speed and motor current.
Fig. 5 is shown in electric current constant control, and the load of compressor when motor being made to have rotated a circle with mechanical angle turns
Square, the output torque of motor, the explanatory diagram of revolving speed and motor current.
Fig. 6 is shown in adjustment control, the load torque of compressor when motor being made to have rotated a circle with mechanical angle, horse
The explanatory diagram of the output torque, revolving speed and the motor current that reach.
Fig. 7 is shown in the adjustment control with Fig. 6 difference example, compression when motor being made to have rotated a circle with mechanical angle
The load torque of machine, the output torque of motor, the explanatory diagram of revolving speed and motor current.
Fig. 8 is the functional block diagram for the speed controlling portion that the motor drive of first embodiment of the invention has.
Fig. 9 is the explanatory diagram for the torque control division that the motor drive of first embodiment of the invention has.
Figure 10 is the explanation in the electric current constant control portion that the motor drive of first embodiment of the invention has
Figure.
Figure 11 is the variation permissibility instruction department having about the motor drive of first embodiment of the invention
Processing explanatory diagram.
Figure 12 is the control coefrficient K of the second transmission function4Bode diagram in biggish situation.
Figure 13 is the control coefrficient K of the second transmission function4Size be it is moderate in the case where Bode diagram.
Figure 14 is the control coefrficient K of the second transmission function4Bode diagram in lesser situation.
Figure 15 is the variation permissibility instruction Δ ω about the motor drive of first embodiment of the inventionr *'s
The explanatory diagram of setting.
Figure 16 is that the variation permissibility of revolving speed is made to instruct Δ ωr *From 0 up to ωrMax *Periodically increased with four-stage
In the case where analog result.
Figure 17 is by the waveform diagram of the time shaft amplification of t0~t1 at the time of Figure 16.
Figure 18 is by the waveform diagram of the time shaft amplification of t1~t2 at the time of Figure 16.
Figure 19 is by the waveform diagram of the time shaft amplification of t2~t3 at the time of Figure 16.
Figure 20 is by the waveform diagram of the time shaft amplification of t3~t4 at the time of Figure 16.
Figure 21 is that the variation permissibility of revolving speed is made to instruct Δ ωr *From 0 up to ωrMax *In the case where neighbouring change dramatically
Analog result.
Figure 22 is the functional block diagram for the speed controlling portion that the motor drive of second embodiment of the present invention has.
Figure 23 is the explanatory diagram for the torque control division that the motor drive of second embodiment of the present invention has.
Figure 24 is the functional block diagram for the speed controlling portion that the motor drive of variation of the invention has.
Specific embodiment
Hereinafter, as an example, being carried out to the structure of the compressor 11 by motor M driving air conditioner 100 (referring to Fig. 2)
Explanation.
" first embodiment "
The structure > of < air conditioner
Fig. 1 is the explanatory diagram for having the air conditioner 100 of the motor drive of first embodiment.
Air conditioner 100 (freezing cycle device) is the equipment carried out for air conditionings such as blowdown firing, warming operations.Such as Fig. 1
Shown, air conditioner 100 has outdoor unit Go, indoor unit Gi and remote controler Re.
It is accommodated with compressor 11 (referring to Fig. 2), outdoor heat exchanger 13 etc. in outdoor unit Go, machine Gi is accommodated with interior indoors
Heat exchanger 14 etc. (referring to Fig. 2).Also, outdoor unit Go and indoor unit Gi is via as aftermentioned refrigerant circuit 10, (reference is schemed
2) the piping k of a part and connect.Remote controler Re is by operating/stopping instruction, the change of set temperature, the change of operation mode
The operation signals such as more are sent to indoor unit Gi.
Fig. 2 is the structure chart for having the air conditioner 100 of motor drive 50.
As shown in Fig. 2, air conditioner 100 has refrigerant circuit 10, outdoor fan Fo and indoor fan Fi.Also, it is empty
Tune machine 100 in addition to the foregoing structure, is also equipped with motor M, converter 20, inverter 30, current detector 40 and motor driving
Device 50.
Refrigerant circuit 10 is annularly to be connected with compressor 11 (load), outdoor heat exchanger in turn via four-way valve 12
13, the circuit of expansion valve 15 and indoor heat exchanger 14.
Compressor 11 is the equipment of the refrigerant of compressed gas shape, is linked with the rotor of motor M.Compressor 11, which has, to be made
The characteristic of periodical cogging is generated in the compression process of cryogen.As such compressor 11, for example, rotation
Formula compressor, reciprocating compressor, but not limited thereto.
Motor M is, for example, permasyn morot, is linked with compressor 11.
Four-way valve 12 is the valve for switching the flow direction of refrigerant.That is, in warming operation (solid arrow of Fig. 2), control
Four-way valve 12 processed so that indoor heat exchanger 14 is functioned as condenser, and sends out outdoor heat exchanger 13 as evaporator
Wave function.On the other hand, when for blowdown firing (dotted arrow of Fig. 2), four-way valve 12 is controlled, so that 13 conduct of outdoor heat exchanger
Condenser functions, and functions indoor heat exchanger 14 as evaporator.
That is, refrigerant circuit 10 is configured to annularly to be connected in turn compressor 11, cold via four-way valve 12
Condenser (one in outdoor heat exchanger 13, indoor heat exchanger 14), expansion valve 15 and evaporator (outdoor heat exchanger 13, interior
Another in heat exchanger 14).Moreover, the detected value based on operation signal, various sensors (not shown) from remote controler Re,
In refrigerant circuit 10, refrigerant is with circulation in well known refrigerating cycle (heat pump cycle).
Outdoor heat exchanger 13 is the heat exchanger to exchange heat between outside air and refrigerant.
Outdoor fan Fo is the fan that outside air is sent into outdoor heat exchanger 13, is set to the attached of outdoor heat exchanger 13
Closely.
Indoor heat exchanger 14 is to exchange heat between air (air of air conditioning object space) and refrigerant indoors
Heat exchanger.
Indoor fan Fi is the fan that room air is sent into indoor heat exchanger 14, is set to the attached of indoor heat exchanger 14
Closely.
Expansion valve 15 is to the valve depressurized by above-mentioned " condenser " condensed refrigerant.It is depressurized by expansion valve 15
Refrigerant afterwards is directed to above-mentioned " evaporator ".
Converter 20 is the power converter that the alternating voltage applied from AC power source E is transformed to DC voltage.
Inverter 30 is three-phase full-bridge inverter, be by the DC voltage conversion applied from converter 20 be three-phase alternating current
Pressure and the three-phase alternating voltage are applied to the power converter of the winding of motor M.
Current detector 40 is, for example, shunt resistance, detects the electric current from the supply of converter 20 to inverter 30.To following
The detected value of 51 output current detector 40 of control unit of the motor drive 50 of explanation.
Motor drive 50 is the device driven by drive motor M with the compressor 11 of motor M connection.Such as figure
Shown in 2, motor drive 50 has control unit 51.Although not shown, but control unit 51 is configured to include CPU (Central
Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), the electricity such as various interfaces
Sub-circuit.Moreover, reading the program for being stored in ROM and the program being unfolded in RAM, CPU executes various processing.
The structure > of < control unit
Fig. 3 is the structure chart for the control unit 51 that motor drive 50 has.
As shown in figure 3, control unit 51 have three-phase/twin shaft transformation component 51a, axis error operational part 51b, PLL circuit 51c,
Integrator 51d and speed controlling portion 51e.Also, control unit 51 is in addition to having above-mentioned structure, be also equipped with subtracter 51f,
51g, current control unit 51h, voltage command operation portion 51i, twin shaft/three-phase transformation component 51j and PWM signal generation section 51k.
In addition, the current detection value based on current detector 40 (referring to Fig. 2), reproduces three phase coordinate systems in control unit 51
Electric current (Iu, Iv, Iw), and the electric current (I is exported to three-phase/twin shaft transformation component 51au, Iv, Iw) value.
Three-phase/twin shaft transformation component 51a is based on the phase theta of the rotor of motor M (referring to Fig. 2)dc, by the electric current of three phase coordinate systems
(Iu, Iv, Iw) it is transformed to the current detection value (I of dc axis, qc axisdc, Iqc).In addition, by the side of the actual magnetic flux Φ in motor M
To as d axis, and using the axis orthogonal with the d axis as q axis.
Also, in control unit 51, it will be assumed that d axis as dc axis (qc axis is also identical).That is, current detection value
(Idc, Iqc) it is the dc axis assumed in control unit 51, the motor current of qc axis.
Axis error operational part 51b for example carrys out operation axis error Δ θ using formula below (1), and axis error Δ θ is motor M
In actual magnetic flux Φ phase with as integrator 51d operation result phase thetadBetween axis error.In addition, formula
(1) R shown in is the winding resistance of motor M, LqcIt is the q axle inductance of motor M.Also, dc shaft voltage instructs Vdc *Deng being marked
Upper target " * " expression be instruction value.
[formula 1]
PLL circuit 51c (Phase Locked Loop) is based on PI and controls (Proportional Integral
Control), the revolving speed of the operation motor M in such a way that the axis error Δ θ and zero calculated by axis error operational part 51b is consistent
ωr.Thus dc axis, the dq axis assumed in control unit 51 is consistent with d axis, the q axis of actual magnetic flux Φ of motor M is corresponded to,
Thus vector controlled can be carried out to position-sensor-free to motor M.
Integrator 51d passes through to rotational speed omegarIt is integrated, carrys out the phase theta of the rotor of operation motor Mdc。
Speed controlling portion 51e is based on the scheduled rotary speed instruction ω calculated in control unit 51 (referring to Fig. 2)r *With from
The rotational speed omega of the motor M of PLL circuit 51c inputr, carry out operation torque current instruction Iq*.The processing of speed controlling portion 51e is
One of main feature of first embodiment is hereinafter described in detail.
The scheduled excitation current instruction Id of subtracter 51f operation*With as three-phase/twin shaft transformation component 51a operation result
Current detection value IdcPoor Δ Id.In addition, in the case where motor M is non-salient pole type (Ld=Lq), excitation current instruction Id*
It is set as zero.Also, in the case where motor M is anti-salient pole type (Ld < Lq), setting instructs Iq based on torque current*It is most suitable
When excitation current instruction Id*。
Subtracter 51g operation instructs Iq as the torque current of the operation result of speed controlling portion 51e*With as three-phase/
The current detection value I of the operation result of twin shaft transformation component 51aqcPoor Δ Iq.
Current control unit 51h the second excitation current instruction of operation Id in a manner of making above-mentioned poor Δ Id, Δ Iq zero*
Iq is instructed with the second torque current*。
Second excitation current instruction of the voltage command operation portion 51i based on the operation result as current control unit 51h
Id*Iq is instructed with the second torque current*, and carry out machine voltage instruction (V using well known voltage equationd *、Vq *)。
Twin shaft/phase theta of the three-phase transformation component 51j based on the operation result as integrator 51ddc, voltage instruction will be used as
Voltage instruction (the V of the d axis of the operation result of operational part 51i, q axisd *、Vq *) it is transformed to the voltage instruction (V of three-phaseu *、Vv *,
Vw *)。
PWM signal generation section 51k is based on the voltage instruction (V as twin shaft/three-phase transformation component 51j operation resultu *、
Vv *、Vw *), to generate the command signal (pwm signal) based on PWM control.By (not scheming to each switch element of inverter 30
Show) pwm signal is exported, carry out drive motor M.
< direct torque, electric current constant control, adjustment control >
Before the speed controlling portion 51e (referring to Fig. 3) for illustrating one of main feature as first embodiment, successively
Illustrate " direct torque ", " electric current constant control " and " adjustment control " of motor M.
Above-mentioned " direct torque " is the output torque for making motor M and the consistent control of load torque of compressor 11.
Fig. 4 is shown in direct torque, and the load of the compressor 11 when motor M being made to have rotated a circle with mechanical angle turns
Square, the output torque of motor M, the explanatory diagram of revolving speed and motor current.
As described above, being produced in the compression process of the refrigerant of compressor 11 if motor M is made to turn around with mechanical angle rotation
Raw cogging (i.e. the load torque of compressor 11 is pulsed).In the example shown in Figure 4, it is revolved in motor M with mechanical angle
During turning around, load torque is once pulsed.
In " direct torque ", as shown in figure 4, due to keeping output torque consistent with load torque, so the revolving speed of motor M
It is constant.Thus vibration, the noise of compressor 11 be can inhibit.On the other hand, the motor current due to the variation with load torque
Peak value significantly change, it is but not shown to this so the loss (copper loss etc.) of motor M becomes biggish value.
Also, " electric current constant control " is output torque (the i.e. motor electricity that variation with load torque independently makes motor M
The peak value of stream) it is constant control.
Fig. 5 is shown in electric current constant control, the compressor when making the rotor of motor M have rotated a circle with mechanical angle
Output torque, the explanatory diagram of revolving speed and motor current of 11 load torque, motor M.
In " electric current constant control ", as noted previously, as the output torque of motor M is maintained constant, so motor is electric
The peak value of stream is also constant.Thus, it is possible to reduce the loss of motor M.On the other hand, since the revolving speed of motor M significantly changes, institute
To be easy to produce vibration in compressor 11.
In this way, the reduction of the inhibition of the vibration of compressor 11 and the loss of motor M becomes the relationship of tradeoff.Therefore,
In one embodiment, carry out according to the operating condition of motor M come continuously (seamlessly) change direct torque action degree and
" the adjustment control " of the action degree of electric current constant control.Thereby, it is possible to the inhibition of the vibration for the compressor 11 that gets both and motor M
The reduction of loss.
Fig. 6 is shown in adjustment control, and the load of the compressor 11 when making motor M have rotated a circle with mechanical angle turns
Square, the output torque of motor M, the explanatory diagram of revolving speed and motor current.
In the example shown in Fig. 6, " the adjustment control " close to direct torque (tendency for inhibiting revolving speed) is carried out.Such as Fig. 6
It is shown, by making the output torque of motor M be able to suppress the vibration of compressor 11 close to the pulsation of load torque.Also, due to
Compared with " direct torque " (referring to Fig. 4) the case where, the amplitude of fluctuation of the peak value of motor current is smaller, so can be realized loss
Reduction.
Fig. 7 is shown in the adjustment control with Fig. 6 difference example, when making motor M have rotated a circle with mechanical angle
The load torque of compressor 11, the output torque of motor M, the explanatory diagram of revolving speed and motor current.
In the example shown in Fig. 7, it carries out close to electric current constant control (tendency for inhibiting the peak shifts of motor current)
" adjustment control ".As shown in fig. 7, the variation by inhibiting motor current, can reduce motor losses.Also, with " electric current perseverance
The case where fixed control " (referring to Fig. 5), is compared, and vibration, the noise of compressor 11 are able to suppress.
The structure > of < speed controlling portion
Fig. 8 is the functional block diagram for the speed controlling portion 51e that motor drive 50 has.
As shown in figure 8, speed controlling portion 51e has adder e1, subtracter e2, speed control e3, adder e4, turns
Square control unit e5, electric current constant control portion e6 and variation permissibility instruction department e7.
Adder e1 passes through the scheduled rotary speed instruction ω that will be calculated in control unit 51 (referring to Fig. 2)r *With as electricity
Flow the rotary speed instruction correction value ω of the operation result of constant control portion e61 *It is added, carrys out operation second and revolve rotary speed instruction ωr *。
Subtracter e2 is by revolving rotary speed instruction ω from secondr *Subtract the rotational speed omega of motor Mr, carry out operation revolving speed deviation delta
ωr。
Speed control e3 is based on revolving speed deviation delta ωr, and for example controlled by PI, carry out being averaged for operation and motor M
The corresponding torque current of torque instructs Iq0 *。
Adder e4 is by instructing Iq for the torque current as the operation result of speed control e30 *With as torque
The torque current of the operation result of control unit e5 instructs correction value Iq1 *It is added, carrys out the new torque current instruction Iq of operation*。
Torque control division e5 is based on rotary speed instruction ωr *, revolving speed deviation delta ωrAnd it changes permissibility and instructs Δ ωr *(turn
The variation of speed allows amplitude), and carry out operation torque current instruction correction value using the first transmission function shown in formula below (2)
Iq1 *.The torque current instructs correction value Iq1 *It is to be added in adder e4 shown in Fig. 8 to torque current to instruct Iq0 *'s
Value.
In addition, s shown in formula (2) is Laplace operator, K1、K2、K3It is control coefrficient, ω0It is scheduled center frequency
Rate.
[formula 2]
First transmission function shown in formula (2) has the property that in scheduled centre frequency ω0There is sensitivity (to increase
Benefit) and in other frequencies substantially without sensitivity.Therefore, by by centre frequency ω0Value be set as rotary speed instruction ωr *,
It can be only to rotary speed instruction ωr *The mode reacted of angular frequency constitute torque control division e5.It will not mention substantially as a result,
High and rotary speed instruction ωr *The sensitivity of different frequencies can be realized rotary speed instruction ωr *High-sensitivity (high-gain).
Also, revolving speed deviation delta ω can be made by also havingrEssentially a zero advantage.
Fig. 9 is the explanatory diagram for the torque control division e5 that motor drive 50 has.
Torque control division e5 has the first operational part of the operation of the first transmission function equivalence shown in progress and formula (2)
E51 and change control coefrficient K3Size coefficient changing unit e52.In addition, as described above, the processing of the first operational part e5 is wrapped
The centre frequency ω included0Value be set as rotary speed instruction ωr *。
In the first operational part e51 shown in Fig. 9, by carrying out the scheduled operations such as addition and subtraction, so that revolving speed deviation delta
ωrThe mode operation torque current for being zero instructs correction value Iq1 *, but this is omitted and is described in detail.In this way, making revolving speed deviation delta
ωr(being maintained with the scheduled revolving speed) control for being zero is above-mentioned " direct torque " (referring to Fig. 4).In short, formula (2) institute
The first transmission function shown is the function for carrying out " direct torque ".
Also, coefficient changing unit e52 shown in Fig. 9, which has, changes test section e521, subtracter e522 and integrator
e523。
Test section e521 is changed for example by the revolving speed deviation delta ω in the detection predetermined timerVariation peak value, carry out operation
Revolving speed deviation delta ωrAmplitude.In addition it is also possible to carry out operation revolving speed deviation delta ω using first-order lag filterrAmplitude
Value.
Subtracter e522 operation revolving speed deviation delta ωrAmplitude and change permissibility instruct Δ ωr *Difference.In addition, becoming
Dynamic permissibility instructs Δ ωr *It is the instruction value for adjusting the action degree of " direct torque ", and from aftermentioned variation permissibility
Instruction department e7 (referring to Fig. 8) is input to subtracter e522.The variation permissibility instructs Δ ωr *It is smaller, the action of " direct torque "
Degree is stronger.
Integrator e523 is so that the difference of the operation result as subtracter e522 is zero (that is, making revolving speed deviation delta ωrVibration
Amplitude and variation permissibility instruct Δ ωr *Mode unanimously) changes control coefrficient K3Size.In addition it is also possible to using being based on
The proportional integrator of PI control replaces integrator e523.
Electric current constant control shown in Fig. 8 portion e6 is based on rotary speed instruction ωr *, torque current instruct Iq0 *And change permission
Degree instruction Δ q*(variation of torque current allows amplitude), and carry out operation using the second transmission function shown in formula below (3)
Rotary speed instruction correction value ω1 *.Rotary speed instruction correction value ω1 *It is to be added in adder e1 shown in Fig. 8 to rotary speed instruction
ωr *Value.Also, K shown in formula (3)4、K5It is control coefrficient.
[formula 3]
Second transmission function shown in formula (3) has following characteristic: in scheduled centre frequency ω0There is sensitivity (to increase
Benefit) and in other frequencies substantially without sensitivity.Therefore, by by centre frequency ω0Value be set as rotary speed instruction ωr *, energy
Enough only to rotary speed instruction ωr *The mode reacted of angular frequency constitute electric current constant control portion e6.Substantially will not as a result,
It improves and rotary speed instruction ωr *The sensitivity of different frequencies can be realized rotary speed instruction ωr *High-sensitivity (high-gain
Change).Also, also having can make torque current instruct Iq0 *Constant advantage.
Figure 10 is the explanatory diagram for the electric current constant control portion e6 that motor drive 50 has.
Electric current constant control portion e6 has the second operation of the operation of the second transmission function equivalence shown in progress and formula (3)
Portion e61 and change control coefrficient K5Size coefficient changing unit e62.In addition, as described above, the processing institute of the second operational part e6
Including centre frequency ω0Value be set as rotary speed instruction ωr *。
In the second operational part e61 shown in Fig. 10, by carrying out the scheduled operations such as addition and subtraction, so that torque current refers to
Enable Iq0 *Constant mode operation rotary speed instruction correction value ω1 *, but this is omitted and is described in detail.In this way, referring to torque current
Enable Iq0 *The control of constant (eliminating the pulsation of output torque) is above-mentioned " electric current constant control " (referring to Fig. 5).In short, formula
(3) the second transmission function shown in is the function for carrying out " electric current constant control ".
Coefficient changing unit e62 shown in Fig. 10, which has, changes test section e621, subtracter e622 and integrator e623.
Test section e621 is changed for example by the variation peak value of the torque current deviation delta Iq in the detection predetermined time, to transport
Calculate the amplitude of torque current deviation delta Iq.In addition it is also possible to carry out operation torque current deviation delta using first-order lag filter
The amplitude of Iq.
The amplitude and variation permissibility of subtracter e622 operation torque current deviation delta Iq instructs Δ Iq*Difference.In addition,
It changes permissibility and instructs Δ Iq*It is the instruction value for adjusting the action degree of " electric current constant control ", and from aftermentioned variation
Permissibility instruction department e7 (referring to Fig. 8) is input to subtracter e622.The variation permissibility instructs Δ Iq*It is smaller, " the constant control of electric current
The action degree of system " is stronger.
Integrator e623 is so that the difference of the operation result as subtracter e622 is zero (that is, making torque current deviation delta Iq
Amplitude and change permissibility instruct Δ Iq*Mode unanimously) changes control coefrficient K5Size.In addition it is also possible to use
Integrator e623 is replaced based on the proportional integrator of PI control.
In Fig. 9, to the control coefrficient K of change the first transmission function (formula (2))3Structure be illustrated, and Figure 10
In, to the control coefrficient K of change the second transmission function (formula (3))5Structure be illustrated, but not limited to this.That is,
The control coefrficient K of the first transmission function can be changed1、K2、K3In one or more, and the second transmitting letter can also be changed
Several control coefrficient K4、K5In one or more.
The change shown in Fig. 8 for changing permissibility instruction department e7 and being based on the revolving speed calculated in control unit 51 (referring to Fig. 2)
Dynamic permissibility instructs Δ ωr *, carry out the variation permissibility instruction Δ Iq of operation torque current*。
Figure 11 is the explanatory diagram about the processing for changing permissibility instruction department e7.
In addition, the horizontal axis of Figure 11 is the variation permissibility instruction Δ ω of the revolving speed of motor Mr *, the longitudinal axis is the change of torque current
Dynamic permissibility instructs Δ Iq*。
Permissibility instruction department e7 (referring to Fig. 8) is changed to permit based on the variation of the revolving speed by control unit 51 (referring to Fig. 2) setting
Xu Du instructs Δ ωr *The function for the line segment L being negative with gradient carrys out the variation permissibility instruction Δ Iq of operation torque current*。
As a result, instructing (Δ ω by variation permissibilityr *、ΔIq*) specifically operating point is moved along line segment L, thus is changed permissibility and referred to
Enable Δ ωr *、ΔIq*In it is one bigger, another is smaller.In other words, in " direct torque " and " electric current constant control "
The action degree of one side becomes strong, and the action degree of another party dies down.In addition, data shown in Figure 11 are pre-stored within control unit 51
(referring to Fig. 2).
For example, the variation permissibility of revolving speed instructs Δ ω in the operating point p1 of Figure 11r *It is zero, the variation of torque current is permitted
Xu Du instructs Δ Iq*For maximum value Δ IqMax *, carry out " direct torque " (referring to Fig. 4).
Also, Δ ω is instructed in the variation permissibility of operating point p2, revolving speedr *For maximum value Δ ωrMax *, torque current
It changes permissibility and instructs Δ Iq*It is zero, carries out " electric current constant control " (referring to Fig. 5).
Also, between operating point p1, p2 in line segment L, above-mentioned " adjustment control " (referring to Fig. 6, Fig. 7) is carried out.This
Sample changes permissibility instruction department e7 by making and changes permissibility instruction (Δ ωr *、ΔIq*) operating point moved on line segment L,
Change " direct torque " and the action degree of " electric current constant control " continuously.
Moreover, changing the variation permissibility instruction Δ that permissibility instruction department e7 will be input to the revolving speed of itself from control unit 51
ωr *It exports to torque control division e5 (referring to Fig. 8).Also, permissibility instruction department e7 is changed by the variation permissibility of torque current
Instruct Δ Iq*It exports to electric current constant control portion e6 (referring to Fig. 8).As described above, above-mentioned variation permissibility instructs Δ ωr *、Δ
Iq*In the control coefrficient K for changing the first transmission function3The control coefrficient K of (referring to Fig. 9) and the second transmission function5(referring to Fig.1 0)
When use.
Figure 12 is the control coefrficient K of the second transmission function4Bode diagram in biggish situation.
In addition, in the example shown in Figure 12, other control coefrficient K included by the second transmission function3、K5It is fixed value
(Figure 13, Figure 14 are also identical).As shown in figure 12, gain and phase are in centre frequency ω0Near change.
Figure 13 is the control coefrficient K of the second transmission function4Size be it is moderate in the case where Bode diagram.
As shown in figure 13, gain and phase are in centre frequency ω0Near change, but its variation degree ratio Figure 12 it is small.
Figure 14 is the control coefrficient K of the second transmission function4Bode diagram in lesser situation.
As shown in figure 14, gain and phase are in centre frequency ω0Near change, but its variation degree compared to Figure 13 into
One step becomes smaller.In this way, by changing control coefrficient K4Size, to change the sensitivity (gain) of centre frequency, thus from knot
The action degree that can continuously adjust " electric current constant control " is seen on fruit.Also, pass through the control for changing the first transmission function
COEFFICIENT K1、K2、K3In at least one size, also can continuously adjust the action degree of " direct torque ".
Next, instructing Δ ω to the variation permissibility in control unit 51r *Be set for illustrate.
Figure 15 is about variation permissibility instruction Δ ωr *Setting explanatory diagram.
The horizontal axis of Figure 15 is the revolving speed of motor M, and the longitudinal axis is the load torque of motor M.In addition, the revolving speed as horizontal axis, energy
Enough use above-mentioned rotational speed command value ωr *.Such as the detected value based on current detector 40 shown in Fig. 2 is come the operation longitudinal axis
Load torque (average load torque).
Control unit 51 (referring to Fig. 2) revolving speed and load torque based on motor M, in the first drive area shown in figure 15
Any region controls motor M in Q1, the second drive area Q2 and third drive area Q3.
For example, making motor M with low speed high load in driven first drive area Q1, control unit 51 is by the change of revolving speed
Dynamic permissibility instructs Δ ωr *It is set as zero.Δ ω is instructed based on the variation permissibilityr *, the variation permissibility of torque current is referred to
Enable Δ q*It is set as maximum value Δ qMax *(referring to Fig.1 1).Moreover, the cyclical movement carried out with load torque independently makes horse
Up to " direct torque " (referring to Fig. 4) of the invariablenes turning speed of M.In this way, by preferentially carrying out " torque control in the first drive area Q1
System " can effectively inhibit noise, the vibration of compressor 11.In addition, in " direct torque ", the current peak of motor M according to
The cyclical movement of load torque and change (referring to Fig. 4).
Also, control unit 51 is by the change of revolving speed making motor M in the driven second drive area Q2 of high speed underload
Dynamic permissibility instructs Δ ωr *It is set as maximum value Δ ωrMax *(referring to Fig.1 1).Δ ω is instructed based on the variation permissibilityr *, will
The variation permissibility of torque current instructs Δ q*It is set as zero (referring to Fig.1 1).Moreover, become with the periodical of load torque
Dynamic " electric current constant control " (referring to Fig. 5) for independently making the current peak of motor M constant.In this way, by driving area second
" electric current constant control " preferentially is carried out in the Q2 of domain, the loss of motor M can be reduced, realizes high efficiency.In addition, " electric current is permanent
In fixed control ", the revolving speed of motor M is changed according to the cyclical movement of load torque (referring to Fig. 5).
Also, in the third drive area Q3 between the first drive area Q1 and the second drive area Q2, control
The variation permissibility of revolving speed is instructed Δ ω by portion 51r *It is set as moderate value.Δ ω is instructed based on the variation permissibilityr *,
The variation permissibility of torque current is instructed into Δ q*It is also set to moderate value (referring to Fig.1 1).Thus it carries out above-mentioned
" adjustment control ".
For example, if the current peak of concern motor M, in the Q3 of third drive area, the current peak of every rotation of motor M
The amplitude of fluctuation of value becomes the amplitude of fluctuation smaller than the amplitude of fluctuation of the first drive area Q1 and than the second drive area Q2
Big value (referring to Fig. 6, Fig. 7).
If also, paying close attention to the revolving speed of motor M, in the Q3 of third drive area, the variation of the revolving speed of every rotation of motor M
Amplitude becomes big and smaller than the amplitude of fluctuation of the second drive area Q2 value (ginseng of the amplitude of fluctuation than the first drive area Q1
According to Fig. 6, Fig. 7).In this way, by carrying out " adjustment control " in the Q3 of third drive area, be able to suppress compressor 11 vibration,
Noise, while the loss of motor M can be reduced.
In this way, control unit 51 makes to change permissibility instruction Δ ωr *(variation of revolving speed allows amplitude) turns with motor M's
Speed becomes smaller and becomes smaller, and makes to change permissibility instruction Δ ωr *As the load torque of motor M becomes larger and become smaller.As a result, can
The optimal control of enough vibration, losses that motor M is accounted for according to the operating condition of motor M.
In addition it is also possible to not make to change permissibility instruction Δ ωr *Periodically (Δ ωr *=0, moderate, ωrMax *)
Variation, and made to change permissibility instruction Δ ω according to the operating condition of motor Mr *Continuously change.Though also, being saved in Figure 15
Slightly, but vibration, noise are easily caused in the presumptive area near the resonant frequency of compressor 11, thus preferably preferential progress
" direct torque ".
< effect >
According to first embodiment, motor drive 50 is based on changing permissibility instruction (Δ ωr *、ΔIq*) change
The control coefrficient K of first transmission function (referring to formula (2))3, the second transmission function (referring to formula (3)) control coefrficient K5.As a result,
It continuously can (seamlessly) switch the action degree of " direct torque " and " electric current constant control " with fairly simple structure.
Also, assumes to become and switch " direct torque " and " the constant control of electric current using scheduled switching mechanism (not shown)
The structure of system " then has a possibility that generating the switching shocks such as vibration, noise in the switching of operation mode.In contrast,
In one embodiment, due to changing " direct torque " and the action degree of " electric current constant control " continuously, so substantially not
Above-mentioned switching shock can be generated.
Also, according to first embodiment, by enhancing the action degree of " direct torque " in high load capacity low-speed running,
Vibration, the noise of compressor 11 can be effectively inhibited.Also, when underload runs at high speed, " the constant control of electric current can be enhanced
The action degree of system " reduces loss, to realize high efficiency.In this way, according to first embodiment, it can be according to motor M's
Operating condition carries out optimal control.
< analog result >
Figure 16 is that the variation permissibility of revolving speed is made to instruct Δ ωr *From 0 up to ωrMax *Periodically increased with four-stage
In the case where analog result.It is carried out under the conditions of in addition, simulation shown in Figure 16 is shown in the table 1 below.
[table 1]
T0~t1 at the time of Figure 16, as Δ ωr *=0 (referring to Fig.1 1) has carried out " direct torque ", and in moment t1
~t3 makes Δ ωr *Periodically increase.That is, periodically weakening the action degree of direct torque, and interim
Ground enhances the action degree (adjustment control) of electric current constant control.Moreover, in moment t3~t4, as Δ ωr *=ωrMax *
(referring to Fig.1 1) has carried out " electric current constant control ".
As shown in figure 16, in the direct torque of moment t0~t1 the amplitude of fluctuation of biggish torque and motor current with
Time process and decrease in stages.Also, the invariablenes turning speed in the direct torque of moment t0~t1, but the variation width of revolving speed
Degree becomes larger with time going by and periodically.
Figure 17 is the waveform diagram for amplifying the time shaft (horizontal axis) of t0~t1 at the time of Figure 16.
In addition, the solid line of " torque " shown in the upper figure of Figure 17 is the output torque of motor M, dotted line is load torque (figure
18, Figure 19 is also identical).Also, " motor current " shown in the following figure of Figure 17 is the U phase, V phase, W phase for flowing to the winding of motor M
Electric current (Figure 18, Figure 19 are also identical).
As shown in figure 17, by carrying out making the output torque of motor M and load torque roughly the same " direct torque ", come
Consistently maintain the revolving speed of motor M.Thus, it is possible to inhibit the vibration of compressor 11, noise.
Figure 18 is the waveform diagram for amplifying the time shaft (horizontal axis) of t1~t2 at the time of Figure 16.
By slightly weakening the action degree of above-mentioned " direct torque " compared with Figure 17 the case where, it is able to suppress compressor
11 vibration, noise, while being able to suppress the variation of the peak value of motor M.Thereby, it is possible to reduce the loss of motor M, realize efficient
Rate.
Figure 19 is the waveform diagram for amplifying the time shaft (horizontal axis) of t2~t3 at the time of Figure 16.
By further weakening the action degree of above-mentioned " direct torque " compared with Figure 18, enhance " electric current constant control "
Action degree, high efficiency can be further realized.
Figure 20 is the waveform diagram for amplifying the time shaft (horizontal axis) of t3~t4 at the time of Figure 16.
By as Δ ωr *=ωrMax *(referring to Fig.1 1) carries out " electric current constant control ", as shown in figure 20, motor current
Peak value it is constant.Thereby, it is possible to reduce the loss of motor M as far as possible, high efficiency is realized.
Figure 21 is that the variation permissibility of revolving speed is made to instruct Δ ωr *From 0 up to ωrMax *Nearby sharply (stage) becomes
Analog result in the case where change.
Known to: " direct torque " of revolving speed constant is carried out in moment t10~t11, and in moment t11~t12,
The action degree of " electric current constant control " becomes strong.Also, know: revolving speed of motor M etc. also smoothly becomes near moment t11
Change, switching shock will not be generated.
" second embodiment "
The knot of torque control division e8 (referring to Figure 22) and electric current constant control portion e9 (referring to the figure) of second embodiment
Structure is different from the first embodiment.Also, second embodiment, which is different from the first embodiment, is a little: having amplitude limitation instruction
Portion e10 (referring to Figure 22) is come the variation permissibility instruction department e7 that replaces illustrating in the first embodiment (referring to Fig. 8).In addition,
Other structures (the structure etc. of control unit 51: identical with first embodiment referring to Fig. 3).Therefore, illustrate and first embodiment
Different parts omits the description duplicate part.
Figure 22 is the functional block diagram for the speed controlling portion 51Ae that the motor drive of second embodiment has.
As shown in figure 22, speed controlling portion 51Ae have adder e1, subtracter e2, speed control e3, adder e4,
Torque control division e8, electric current constant control portion e9 and amplitude limit instruction department e10.In addition, except torque control division e8, electric current are permanent
The structure determined other than control unit e9 and amplitude limitation instruction department e10 is identical as first embodiment (referring to Fig. 8), thus omits
Explanation.
Torque control division e8 is based on rotary speed instruction ωr *, revolving speed deviation delta ωrAnd scheduled amplitude limitation instruction carrys out operation
Torque current instructs correction value Iq1 *。
Figure 23 is the explanatory diagram for the torque control division e5 that motor drive has.
As shown in figure 23, torque control division e8 has signal generator e81, Fourier transform portion e82, integral compensator
E83, amplitude limiting unit e84 and inverse fourier transform portion e85.
Signal generator e81 generates rotary speed instruction ωr *Sin ingredient and cos ingredient signal.
Fourier transform portion e82 is entered revolving speed deviation delta ωr, and rotary speed instruction ω is extracted respectivelyr *Sin ingredient and
Cos ingredient (primary components).
Integral compensator e83 is the rotary speed instruction ω that operation is used to make to be extracted by Fourier transform portion e82r *Frequency
The integrator of sin ingredient and cos ingredient that ingredient is zero.
Amplitude limiting unit e84 is limited based on the sin ingredient and cos ingredient inputted from integral compensator e83 and from amplitude
The amplitude of instruction department e10 (referring to Figure 22) input limits instruction, to limit the revolving speed deviation delta ω of motor MrAmplitude.As a result,
Adjust the action degree of " direct torque ".In addition, with above-mentioned amplitude (i.e. as amplitude becomes smaller) is limited, " direct torque "
Action degree becomes strong.
The operation result (sin ingredient, cos ingredient) of amplitude limiting unit e84 is transformed to torque by inverse fourier transform portion e85
Current-order correction value Iq1 *。
Electric current constant control portion e9 shown in Figure 22 is to Fourier transform portion (not shown) input torque current-order Iq0 *,
And rotary speed instruction correction value ω is exported from inverse fourier transform portion1 *, this point and torque control division e8 (referring to Figure 23) is different.
In addition, electric current constant control portion e9 is structure identical with torque control division e8 about other structures.By the electric current constant control
Portion e9 adjusts the action degree of " electric current constant control ".
The limitation of amplitude shown in Figure 22 instruction department e10 is based on the variation permissibility calculated by control unit 51 (referring to Fig. 2)
Instruct Δ ωr *, carry out operation for limiting the rotation speed change Δ ω of motor MrThe amplitude of amplitude limit instruction, and the amplitude is limited
System instruction is exported to torque control division e5.
Also, amplitude limits instruction department e10 and is based on changing permissibility instruction Δ ωr *, carry out operation for limiting motor M's
The amplitude of the amplitude of torque current deviation delta Iq limits instruction, and the amplitude is limited instruction output to electric current constant control portion
e9。
In addition, the variation permissibility instruction Δ ω that control unit 51 (referring to Fig. 2) is carried outr *Setting and the first embodiment party
Formula (referring to Fig.1 5) is identical, to omit the description.
< effect >
According to second embodiment, it continuously can (seamlessly) switch rising for " direct torque " and " electric current constant control "
Effect degree, and optimal control can be carried out according to the operating condition of motor M.
" variation "
More than, motor drive 50 of the invention is illustrated by each embodiment, but the present invention does not limit
In above-mentioned record, it is able to carry out various changes.
For example, in the first embodiment, being with the structure that the speed controlling portion 51e of motor drive 50 has Fig. 8
Example is illustrated, and but not limited to this.That is, speed controlling portion 51Be can also be constituted as illustrated in fig. 24.
Figure 24 is the functional block diagram for the speed controlling portion 51Be that the motor drive of variation has.
In Figure 24, have subtracter e11 and adder e12 to replace the adder e1 illustrated in the first embodiment
(referring to Fig. 8) and subtracter e2, this point are different from the first embodiment, but other structures are identical with first embodiment.
Subtracter e11 is by from scheduled rotary speed instruction ωr *Subtract the rotational speed omega of motor Mr, carry out operation revolving speed deviation delta
ωr.Revolving speed deviation delta ωrIt is output to adder e12 described below, and is also output to torque control division e5.
Adder e12 passes through will be as the revolving speed deviation delta ω of the operation result of subtracter e11rWith as the constant control of electric current
The rotary speed instruction correction value ω of the operation result of portion e6 processed1 *It is added, carrys out the new revolving speed deviation delta ω of operationr'.It is inclined based on the revolving speed
Poor Δ ωr' and instruct Iq by speed control e3 come operation torque current0 *.In such a configuration, it also functions to and implements with first
The identical effect of mode.
Also, in various embodiments, the structure of the compressor 11 by motor M driving air conditioner 100 is illustrated,
But not limited to this.For example, periodical cogging can be generated by motor M driving in freezing cycle device of refrigerator etc etc.
Compressor (load) structure in can also apply each embodiment.
Also, in various embodiments, to " direct torque " is carried out in the first drive area Q1 (referring to Fig.1 5), the
" electric current constant control " is carried out in two drive area Q2 and the structure that " adjustment control " is carried out in the Q3 of third drive area carries out
Explanation, but not limited to this.For example, it is also possible to pay close attention to the revolving speed of motor M, direct torque is carried out in low-speed region,
Electric current constant control is carried out in intermediate speed region, and well known field weakening control is carried out in high-speed region.Also, it can also close
The load torque for infusing motor M, carries out direct torque in high-load region, and the constant control of electric current is carried out in low-load region
System.That is, control unit 51 can also adjust turning for motor M based at least one party in the revolving speed of motor M and load torque
The variation of speed allows amplitude.
Also, in various embodiments, the compression to a cogging is generated when the mechanical angle rotation of motor M is turned around
Machine 11 is illustrated, and but not limited to this.For example, in dual rotation type compressor, the small-sized freezing such as be widely used in refrigerator
Also each embodiment can be applied in the reciprocating compressor of circulator.
Also, Δ ω in various embodiments, is instructed to the variation permissibility based on revolving speedr *To control the structure of motor M
It is illustrated, even with associated value (such as the vibration acceleration of motor M), axis of the vibration with compressor 11, motor M
The amplitude of fluctuation etc. of error delta θ, is also able to carry out identical control.
Also, 51 example of control unit in the first embodiment, having as motor drive 50 goes out the knot of Fig. 3
Structure, but not limited to this.That is, the structure as control unit 51, is also able to use the vector controlled phase with position-sensor-free
The other well known structure closed.
Also, the first transmission function and the second transmission function illustrated in the first embodiment be not limited to formula (2) and
Formula (3).That is, being the transmission function only to specific frequency with sensitivity, other transmission functions also can be used.
In addition, each embodiment is for easy understanding to illustrate the present invention and carried out detailed record, it is not limited to
Must have illustrated all structures.Also, a part of the structure for each embodiment, is able to carry out other structures
Additional, deletion, displacement.
Also, such as can also design in integrated circuits etc. realized in a manner of hardware above-mentioned each structure,
Function, processing unit, processing component etc. it is some or all.Also, mechanism, structure show the machine for thinking to need in explanation
Structure, structure must not necessarily show all mechanisms, structure on product.
The explanation of symbol
100-air conditioners (freezing cycle device), 10-refrigerant circuits, 11-compressors (load), 12-four-way valves,
13-outdoor heat exchangers (condenser, evaporator), 14-indoor heat exchangers (evaporator, condenser), 15-expansion valves, 20-become
Parallel operation, 30-inverters, 40-current detectors, 50-motor drives, 51-control units, M-motor, Q1-first drive
Dynamic region, the second drive area Q2-, Q3-third drive area.
Claims (6)
1. a kind of motor drive, which is characterized in that
Have control unit, at least one party in revolving speed and load torque of the above-mentioned control unit based on the motor linked with load, to adjust
The variation of the revolving speed of whole said motor allows amplitude.
2. motor drive according to claim 1, which is characterized in that
Above-mentioned control unit makes above-mentioned variation that amplitude be allowed to become smaller as above-mentioned revolving speed becomes smaller, and above-mentioned variation is made to allow amplitude
As above-mentioned load torque becomes larger and become smaller.
3. motor drive according to claim 1 comprising:
First drive area, in the area, the current peak of said motor according to the cyclical movement of above-mentioned load torque and
It changes；
Second drive area, in the area, the cyclical movement with above-mentioned load torque independently make above-mentioned current peak permanent
It is fixed；And
Third drive area, in the area, the amplitude of fluctuation of the above-mentioned current peak of every rotation of said motor is than above-mentioned
The amplitude of fluctuation of one drive area is small and bigger than the amplitude of fluctuation of above-mentioned second drive area,
Above-mentioned control unit is based on above-mentioned revolving speed and above-mentioned load torque, in above-mentioned first drive area, above-mentioned second driving area
Said motor is controlled in any region of domain and above-mentioned third drive area.
4. motor drive according to claim 1 comprising:
First drive area, in the area, the cyclical movement with above-mentioned load torque independently make above-mentioned invariablenes turning speed；
Second drive area, in the area, above-mentioned revolving speed are changed according to the cyclical movement of above-mentioned load torque；And
Third drive area, in the area, the amplitude of fluctuation of the above-mentioned revolving speed of every rotation of said motor are driven than above-mentioned first
The amplitude of fluctuation in dynamic region is big and smaller than the amplitude of fluctuation of above-mentioned second drive area,
Above-mentioned control unit is based on above-mentioned revolving speed and above-mentioned load torque, in above-mentioned first drive area, above-mentioned second driving area
Said motor is controlled in any region of domain and above-mentioned third drive area.
5. a kind of freezing cycle device, which is characterized in that have:
Refrigerant circuit is annularly sequentially connected compressor, condenser, expansion valve and evaporator, and refrigerant exists
It is recycled in refrigerating cycle；With
Motor drive, the motor of driving and above-mentioned compressor connection,
Said motor driving device adjusts turning for said motor based at least one party in the revolving speed of said motor and load torque
The variation of speed allows amplitude.
6. a kind of motor driving method, which is characterized in that
The variation of the revolving speed of said motor is adjusted based at least one party in the revolving speed of the motor linked with load and load torque
Permission amplitude.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910379876.4A CN110086381B (en) | 2016-09-26 | 2017-09-22 | Motor driving device, refrigeration cycle device provided with same, and motor driving method |
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| JP2016-187541 | 2016-09-26 | ||
| JP2016187541A JP6364463B2 (en) | 2016-09-26 | 2016-09-26 | Motor driving apparatus, refrigeration cycle apparatus including the same, and motor driving method |
| PCT/JP2017/034270 WO2018056394A1 (en) | 2016-09-26 | 2017-09-22 | Motor driving device, refrigeration cycle device having same, and method for driving motor |
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| JP2019187087A (en) * | 2018-04-10 | 2019-10-24 | 三菱重工サーマルシステムズ株式会社 | Control device, power conversion device, air-conditioning system, control method, and program |
| JP2019187085A (en) * | 2018-04-10 | 2019-10-24 | 三菱重工サーマルシステムズ株式会社 | Control device, power conversion device, air-conditioning system, control method, and program |
| JP2019187086A (en) * | 2018-04-10 | 2019-10-24 | 三菱重工サーマルシステムズ株式会社 | Control device, power conversion device, air-conditioning system, control method, and program |
| JP7123819B2 (en) * | 2019-01-28 | 2022-08-23 | 日立グローバルライフソリューションズ株式会社 | Motor control device and compressor and refrigerator using the same |
| JP7195165B2 (en) * | 2019-01-31 | 2022-12-23 | 日立グローバルライフソリューションズ株式会社 | Control device, motor drive device, and refrigeration equipment using the same |
| JP2021107695A (en) | 2019-12-27 | 2021-07-29 | ダイキン工業株式会社 | Compressor control method |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP6364463B2 (en) | 2018-07-25 |
| CN109314477B (en) | 2022-08-26 |
| JP2018057085A (en) | 2018-04-05 |
| WO2018056394A1 (en) | 2018-03-29 |
| CN110086381B (en) | 2022-09-20 |
| CN110086381A (en) | 2019-08-02 |
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