JP4274800B2 - Motor control device, air conditioner and refrigerator using the control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for controlling a motor in which pulsations that vary depending on a load are generated, and more particularly to an apparatus for controlling either a voltage or a current supplied to the motor.
[0002]
[Prior art]
In general, a compressor used in an air conditioner, a refrigerator, or the like is an important component of a refrigeration cycle that performs heat exchange after compressing a refrigerant into a high temperature and high pressure state. This compression operation is generally divided into three processes. These are a suction process for filling the refrigerant in the cylinder inside the compressor, a compression process for compressing the refrigerant in the cylinder, and a discharge process for releasing the compressed refrigerant to the outside of the compressor.
[0003]
A compressor is classified into a rotary system, a reciprocating system, a scroll system, etc. according to the compression mechanism. In particular, the rotary system has the features that the structure is simple, the number of parts is small, the cost is low, the compression efficiency is good (however, it is influenced by the structure of the cylinder part), and the efficiency is easy.
[0004]
In the rotary system, an eccentric rotary piston rotates inside a cylinder to perform suction, compression, and discharge processes, and compresses the refrigerant. For this reason, there is a problem that vibration and noise increase due to load fluctuations and eccentricity of the rotating shaft due to suction, compression, and discharge processes during one rotation.
[0005]
Although the technology to offset the mutual vibration by shifting the rotation of the rotary piston by 180 degrees with two cylinder parts has been put into practical use, the structure is more complicated, the cost is higher and the efficiency is higher than the single rotary system with one cylinder part There is a problem that it falls.
[0006]
Japanese Patent Application Laid-Open No. 11-187692 (Patent Document 1) discloses a technique for suppressing vibration and noise by controlling motor torque in a single rotary compressor. The motor torque unevenness reducing device disclosed in this publication includes a detection unit that detects a rotor position of a motor driven by an inverter for each predetermined electrical angle and outputs a signal, and a signal output from the detection unit. A measurement unit that measures the output interval, a storage unit that stores a pattern of the energization signal level based on the reverse phase pattern of the fluctuation pattern of the load torque of the motor measured in advance, and the output interval measured by the measurement unit is a minimum value or And a control unit that controls the motor by determining the rotor position having the maximum value as a reference position, reading a pattern of energization signal levels stored in the storage unit based on the reference position, and outputting the read pattern to the inverter.
[0007]
According to this apparatus, the motor is driven by the energization signal based on the reverse phase pattern of the load torque variation pattern, and the load torque unevenness is cancelled. Thereby, the load torque unevenness of the motor can be reduced with a simple configuration. As a result, torque unevenness is reduced, and the rotor speed during one rotation can be made constant. As a result, it is possible to provide a torque unevenness reducing device that can reduce vibration.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-187692 (page 3-6, FIG. 1)
[0009]
[Problems to be solved by the invention]
However, in the apparatus described in the above publication, the motor is controlled so that the fluctuation in the speed of the compressor is as small as possible. Since the motor is controlled so as to reduce the speed fluctuation, the pulsation of the amplitude of the motor current increases, the peak value of the motor current increases, the copper loss in the motor section increases, and the efficiency decreases. is there.
[0010]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to control a motor mounted on a single rotary compressor or the like that drives a motor having pulsation synchronized with rotation with high efficiency. It is providing a device, an air conditioner using the control device, and a refrigerator.
[0011]
  A motor control apparatus according to a first aspect of the present invention includes a power supply means for supplying power to a motor having a rotor, a detection means for detecting a mechanical angle of the rotor,ElectricPowerVoltage andCurrentOne ofThecorrectionYouRu, Corresponding to mechanical anglepluralStorage means for storing correction values in advance;A selection means for selecting one correction value from among a plurality of correction values stored in advance by the storage means;meansSelectedControl means for controlling either the voltage or the current in the electric power based on the correction value.Thus, the plurality of correction values stored in advance by the storage means are based on the first torque pattern in which the torque compensation amount during torque control equalizes the pulsation of current caused by load torque when torque control is not performed. A first correction value that is determined, and a second correction value that is set based on a second torque pattern that is set so that a torque compensation amount during torque control coincides with a load torque when torque control is not performed. IncludingMu
[0012]
  According to the first invention, the control means is stored in the storage means.Select the selection meansThe voltage and current are controlled based on the correction value corresponding to the mechanical angle. This correction value isThe torque compensation amount during torque control equalizes the current pulsation caused by the load torque when torque control is not performed, the first correction value determined based on the first torque pattern, and the torque during torque control The compensation amount includes a second correction value that is set based on a second torque pattern that is set to coincide with the load torque when torque control is not performed.For exampleAccording to the first correction value,It is determined that the fluctuation of the current due to the pulsating current is estimated in advance and the estimated fluctuation is compensated. ThisWithout torque controlLoad torqueCauseCurrent pulsation can be suppressed. Depends on load torqueCurrentSince the pulsation is suppressed, the current change pattern approaches a constant value. The efficiency of the motor increases as the voltage and current change patterns approach constant, so that the pulsation due to the load torque is canceled out, and the efficiency of the motor increases. As a result, it is possible to provide a motor control device that drives a motor having a pulsation synchronized with rotation with high efficiency.Further, according to the second correction value, it is possible to provide a motor control device in which vibration and sound of the motor and the load device are reduced.
[0015]
  First2In addition to the configuration of the first invention, the motor control device according to the invention ofFirstThe correction value isThe torque compensation amount during torque control by the first correction value isOccurrenceLetRuCurrentThe phase of pulsation,The current pulsation caused by the load torque when operating the motor without torque control is inverted upside down.Deviation from pulsation phase is in a predetermined rangeBased on the first torque patternIt is a defined value.
  According to the second invention, the phase of the current pulsation generated by the torque compensation amount at the time of torque control using the first correction value is the load torque when the motor is operated without performing torque control within a predetermined range. Is out of phase with the current pulsation obtained by vertically inverting the pulsation of the current. The predetermined range is, for example, a range in which the motor noise need not be a problem in practice. Since the phase of the current pulsation is shifted, the pulsation of the current generated by the torque compensation amount at the time of torque control by the first correction value cancels the current pulsation caused by the load torque when the motor is operated without performing the torque control to some extent. . Since the current pulsation is canceled, the efficiency of the motor is improved. On the other hand, controlling the control means to pulsate the voltage or current also has the effect of suppressing the pulsation of the angular velocity of the rotor. Thereby, the noise and vibration which arise when a motor drives are suppressed to some extent. As a result, it is possible to provide a motor control device that drives a motor having pulsation synchronized with rotation with high efficiency while suppressing noise and vibration to some extent.
  In the motor control device according to the third invention, in addition to the configuration of the first invention, the second correction value includes a phase of a torque compensation amount corresponding to a mechanical angle at the time of torque control by the second correction value, and This is a value determined based on the second torque pattern in which the deviation from the phase of the load torque corresponding to the mechanical angle when torque control is not performed is in a predetermined range.
[0016]
  According to the third invention,Torque compensation amount during torque control using the second correction valuePhase within a predetermined rangeWithout torque controlLoad torqueofOut of phase. The predetermined range is, for example, a range in which the motor noise need not be a problem in practice.Torque compensation amount during torque control using the second correction valuePhase ofFrom the phase of the load torque when torque control is not performedShiftBut,To some extentMatch. The phase of torque compensation is somewhat consistent with the phase of load torque when torque control is not performedSoTimesEffect of suppressing pulsation of angular velocity of trochanterTheHave. As a result, noise and vibration generated by driving the motor are suppressed to some extent.The
[0017]
According to a fourth aspect of the present invention, there is provided a motor control apparatus, wherein, in addition to the first to third aspects of the invention, the power supply means is an inverter, and the control means is for controlling the DC power supplied to the inverter. Means are included for controlling either the voltage or current.
[0018]
  According to the fourth invention, the inverter supplies power to the motor. The control means controls the voltage or current of DC power supplied to the inverter. Because it controls the voltage and current of the power before it is supplied to the inverter, ElectricThe flow change pattern approaches constant. Thereby, the efficiency of the motor can be further improved. As a result, it is possible to provide a motor control device that drives a motor having a pulsation synchronized with rotation with higher efficiency.
[0019]
  In addition to the configuration of any one of the first to fourth inventions, the memory control device according to the fifth invention includes:Further storing other correction values other than the first correction value and the second correction value, the other correction values stored are:Generated by the control means controlling either voltage or currentCurrentThe phase of pulsation,Without torque controlLoad torqueResulting currentThe deviation from the phase of the pulsation is determined to be included in the predetermined range.This,Selection meansDepending on the predetermined conditions,1st correction value, 2nd correction value, etc.Select one of the correction valuesRu.
[0020]
  According to the fifth invention,ElectricThe correction value for appropriately suppressing the flow pulsation changes based on various conditions when the motor is driven. The selection unit selects one of the correction values based on a predetermined condition such as a time for driving the motor. As a result, even if a change occurs in the conditions for driving the motor, the control means controls the voltage and current according to the change, and pulsation due to torqueCurrentCan be suppressed. As a result, it is possible to provide a motor control device that drives a motor having a pulsation synchronized with rotation with higher efficiency.
[0021]
In the motor control apparatus according to the sixth aspect of the invention, in addition to the configuration of the fifth aspect of the invention, the condition is a condition that is affected by a load applied to the motor.
[0022]
  According to the sixth invention, the load applied to the motor affects the pulsation of the voltage and current supplied to the motor. The selection means selects the correction value according to the condition affected by the load applied to the motor. This makes it more accurate.ToFlow pulsation can be suppressed. As a result, it is possible to provide a motor control device that more accurately drives a motor having a pulsation synchronized with rotation.
[0023]
In the motor control device according to the seventh aspect of the invention, in addition to the configuration of the sixth aspect, the condition affected by the load applied to the motor is a condition determined based on the load torque of the motor.
[0024]
  According to the seventh aspect, the load torque of the motor affects the voltage of electric power supplied to the motor and the pulsation of current. The selection means selects a correction value based on the load torque of the motor. This makes it more accurate.ToFlow pulsation can be suppressed. As a result, it is possible to provide a motor control device that more accurately drives a motor having a pulsation synchronized with rotation.
[0025]
In addition to the configuration of the sixth invention, the motor control device according to the eighth invention is a calculation for calculating the angular velocity of the rotor based on the angular velocity of the rotor detected by the detecting means. Means are further included. Conditions that are affected by the load applied to the motor are determined based on the angular velocity of the rotor.
[0026]
According to the eighth invention, the selection means selects the correction value according to a condition determined based on the angular velocity of the rotor of the motor. The angular speed of the rotor of the motor connected to the load directly affects the magnitude of noise and vibration generated by the motor. Thereby, noise and vibration can be accurately suppressed. As a result, it is possible to provide a motor control device that achieves suppression of noise and vibration and improvement of efficiency as necessary for a motor having pulsation synchronized with rotation.
[0027]
An air conditioner according to a ninth aspect includes the motor control device according to any one of the first to eighth aspects.
[0028]
According to the ninth invention, the motor control device controls the voltage and current of the motor. Thereby, since the efficiency of a motor improves, the efficiency of an air conditioner also improves. As a result, an air conditioner that operates with higher efficiency can be provided.
[0029]
A refrigerator according to a tenth aspect includes a motor control device according to any one of the first to eighth aspects.
[0030]
According to the tenth aspect, the motor control device controls the voltage and current of the motor. Thereby, since the efficiency of a motor improves, the efficiency of a refrigerator also improves. As a result, a refrigerator that operates with higher efficiency can be provided.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.
[0032]
Referring to FIG. 1, motor control apparatus 100 for compressor 170 according to the present embodiment includes AC power supply 110, power factor correction circuit 120, full-wave rectification circuit 130, smoothing circuit 140, and inverter. Unit 150, three-phase brushless motor 160, compressor 170, base driver unit 180, detection unit 190 including a comparator and a resistor, and microprocessor 200. The power factor correction circuit 120 is constituted by a reactor or the like, and also serves as a circuit for preventing an inrush current. The full-wave rectifier circuit 130 is configured by a diode bridge or the like. The smoothing circuit 140 is configured by an electrolytic capacitor or the like. The inverter unit 150 is configured by a switching element or flywheel diode connected in a three-phase bipolar manner, and includes an IGBT (Insulated Gate Bipolar Transistor) 151 connected to the upper side of the U phase, an IGBT 152 connected to the upper side of the V phase, An IGBT 153 connected to the upper side of the W phase, an IGBT 154 connected to the lower side of the U phase, an IGBT 155 connected to the lower side of the V phase, and an IGBT 156 connected to the lower side of the W phase. The three-phase brushless motor drives the compressor 170. The compressor 170 is a single rotary type compressor built in an air conditioner or a refrigerator (not shown). The base driver unit 180 is configured by a voltage level conversion IC (Integrated Circuit) or the like. The detection unit 190 includes a comparator and a resistor. The microprocessor 200 performs control calculations.
[0033]
Referring to FIG. 2, the program executed by microprocessor 200 has the following control structure regarding control of electric power supplied to the motor.
[0034]
In step 100 (hereinafter, step is abbreviated as S), the microprocessor 200 supplies AC power to the motor control device 100 using the AC power supply 110. In S <b> 102, the microprocessor 200 converts the AC power into a direct current using the full-wave rectifier circuit 130 and the smoothing circuit 140 and inputs the AC power to the inverter unit 150.
[0035]
In S <b> 104, microprocessor 200 uses detection unit 190 to detect a position signal representing the position of the rotor. With reference to FIG. 3, a method for detecting the position of the rotor by the induced voltage will be described.
[0036]
FIG. 3A shows the waveform of the induced voltage and the reference voltage from each winding of the brushless motor. However, although the waveform of the induced voltage in FIG. 3A and the waveform of the rotor position signal in FIG. 3B are shown to have the same phase, the induced voltage and the rotor position are actually detected by a method of detecting the induced voltage. There is a phase delay with the signal. In the present embodiment, the brushless motor is three-phase star-connected, and the waveform of the induced voltage generated in each winding is out of phase by 120 °.
[0037]
FIG. 3B is a waveform representing the result of comparing the induced voltage with the reference voltage. When the induced voltage is greater than the reference voltage, “HIGH”, and when the induced voltage is less than “LOW”, a pulse having a rising or falling edge is obtained at the point where the magnetic pole changes, that is, the point where the waveform of the induced voltage crosses zero. Can do. Since the combination of “HIGH” and “LOW” of the pulses for each winding is synchronized with the position of the rotor, the position of the rotor can be detected by detecting the combination of pulses for each winding. FIG. 4 shows the correspondence between ON / OFF of each winding and the state. If the change in the position of the rotor is grasped for each unit time, the angular velocity and the number of rotations of the rotor can be detected.
[0038]
In S106, the microprocessor 200 reads the torque pattern stored in its own storage circuit and determines a PWM (Pulse-Width Modulation) duty. The PWM duty is the time during which the signal is ON / OFF. With reference to FIG. 5, an example of the torque pattern stored in the storage circuit inside the microprocessor 200 will be described. In the present embodiment, six types of torque patterns selected according to the number of rotations of the three-phase brushless motor 160 are stored. Each torque pattern includes a compensation amount corresponding to the state of the three-phase brushless motor 160, and the PWM duty is determined for each state using this compensation amount as a correction value. The state is obtained by dividing one rotation of the rotor for each energization mode, that is, commutation. In other words, it is the product of the number of poles and the number of phases of the motor. For example, a 4-pole brushless motor is divided into 12 and has 12 states from state 0 to state 11. However, the energization modes of the state N and the state N + 6 (N: integer of 0 to 5) are the same. In the present embodiment, the final determined value of the PWM duty is calculated as follows using the reference value and the above-described compensation amount.
[0039]
D = A × D (0) (D: determined value, A: compensation amount, D (0): reference value)
The reference value refers to the PWM duty when the motor is driven at the average rotational speed determined by the motor speed control device (= microprocessor 200).
[0040]
In S108, the microprocessor 200 creates a signal for driving the brushless motor based on the position of the rotor, and performs PWM chopping using the PWM waveform. In this case, PWM chopping refers to finely turning on / off a signal for driving the motor. When the signal is finely turned on / off, the voltage and current applied to each phase of the brushless motor can be controlled according to the PWM duty, and pulsation can be generated in these. Since the voltage and current can be controlled, the output torque can be controlled. Since the voltage and current are controlled according to the torque pattern, the output torque is controlled according to the torque pattern.
[0041]
FIG. 3C is a diagram showing ON / OFF of the signal of each winding when the brushless motor is controlled based on the signal. For example, when the rising edge of the rotor position signal HU is detected, the switching element IGBT 151 on the upper side of the U phase is turned ON. Next, when the rising edge of the rotor position signal HV is detected, the IGBT 151 is turned OFF and the switching element IGBT 152 on the upper side of the V phase is turned ON. When the falling signal of the rotor position signal HW is detected, the switching element on the lower side of the W phase is commutated from the switching element on the lower side of the V phase. As described above, each time the edge of the rotor position signal is detected, the switching elements of the inverter circuit are sequentially commutated to drive the brushless motor. In this embodiment, PWM chopping is performed only when the signal is turned on, but PWM chopping may be performed on the side where the signal is turned off, or on both sides of ON / OFF.
[0042]
In S <b> 110, the microprocessor 200 creates a signal for driving the brushless motor, and when PWM chopping is performed, outputs the PWM chopped signal to the base driver unit 180.
[0043]
In S112, base driver unit 180 converts the output signal for driving the IGBT. In S114, inverter unit 150 performs IGBT switching of IGBTs 151, 152, 153, 154, 155, and 156 based on the converted signals. In S116, inverter unit 150 supplies electric power to motor 16 by IGBT switching and drives compressor 170, so that the air conditioner is operated.
[0044]
An operation of control device 100 based on the above-described structure and flowchart will be described.
[0045]
Electric power for operating the air conditioner is supplied from the AC power supply 110 connected to the motor drive device (S100). When AC power is supplied, it is converted to DC by the full-wave rectifier circuit 130 and the smoothing circuit 140 and input to the inverter unit 150 (S102).
[0046]
The microprocessor 200 detects a position signal indicating the position of the rotor using the detection unit 190 (S104). When detecting the position signal, the microprocessor 200 reads the torque pattern stored in its own storage circuit and determines the PWM duty (S106).
[0047]
When the PWM duty is determined, the microprocessor 200 creates a signal for driving the brushless motor based on the position signal, and performs PWM chopping using the PWM waveform (S108).
[0048]
When a signal for driving the brushless motor is generated and PWM chopping is performed, the microprocessor 200 outputs the PWM chopped signal to the base driver unit 180 (S110). The base driver unit 180 converts the output signal for driving the IGBT (S112). The inverter unit 150 performs IGBT switching of the IGBTs 151, 152, 153, 154, 155, and 156 based on the converted signals (S114). Due to the IGBT switching, power is supplied from the inverter unit 150 to the motor 16 and the compressor 170 is driven, so that the air conditioner is operated (S116).
[0049]
FIG. 6 shows load torque, torque compensation amount, and DC (Direct Current) current waveform when torque control is not performed. FIG. 7 shows a load torque, a torque compensation amount, and a DC current waveform at the time of torque control in which torque control is performed so that fluctuations in the rotational speed are minimized. FIG. 8 shows a load torque, a torque compensation amount, and a DC current waveform at the time of torque control according to the present embodiment in which torque control is performed so that efficiency is as high as possible. As shown in FIG. 6, the torque compensation amount when the torque control is not performed is constant regardless of the rotation angle. As shown in FIG. 7, the torque compensation amount at the time of torque control in the conventional example is set to coincide with the load torque. As shown in FIG. 8, the torque compensation amount at the time of torque control according to the present embodiment reduces the pulsation of the DC current. Therefore, the pulsation of the current is opposite in phase to the pulsation of the DC current when the torque control is not performed. The resulting torque pattern is used.
[0050]
With reference to FIG. 9, the result of having compared the vibration amplitude and efficiency of the compressor about each case is shown. With the control device 100 according to the present embodiment, the pulsation of the DC current is much smaller than when torque control is not performed or when conventional torque control is performed. Since the pulsation of the DC current is reduced, the loss is reduced and the efficiency is improved as shown in FIG. Vibration is much smaller than without torque control. As shown in FIG. 9A, the vibration is larger than that during torque control. Usually, a single rotary compressor is supported by an elastic body such as rubber when incorporated in an air conditioner. In addition, since it is connected to the heat exchanger by a refrigerant pipe having a spring effect, a considerable part of the vibration is absorbed by the elastic body and the refrigerant pipe by performing these optimum designs. Therefore, even if the vibration of the compressor is not reduced as much as the torque control of the conventional example, it may be within a range where the vibration does not cause a problem in practice.
[0051]
  As described above, the control device according to the present embodiment is based on the load torque.RudenIt is possible to cancel the flow pulsation. Since the pulsation can be canceled out, the motor can be driven with high efficiency while suppressing the vibration and noise of the single rotary compressor within a range where there is no practical problem compared to the case where torque control is not performed. . Since the motor is driven with high efficiency while suppressing vibration and noise, significant energy savings such as air conditioners, and low vibration and noise can be achieved. As a result, it is possible to provide a motor control apparatus that can accurately drive a motor having a pulsation synchronized with rotation while achieving both high efficiency and low vibration / low noise.
[0052]
<Modification>
Two types of torque patterns may be stored in the storage circuit. The two types of torque patterns are the first torque pattern and the second torque pattern, which are less efficient than the first torque pattern and the first torque pattern, but the vibration and sound of the motor and the load device are reduced. It is. As a result, the first torque pattern is used during driving that requires high-efficiency driving with reduced power consumption, such as during the daytime in summer, and the second torque is used during driving that requires low vibration and low noise, such as during sleep. The pattern can be switched and used. As a result, it is possible to provide a motor control device that can operate under optimum conditions according to the user's wishes.
[0053]
At the time of torque pattern switching, switching of the torque pattern or change of the target value of the rotation speed of the motor may be prohibited until a certain time has elapsed after switching. Thereby, since an abnormal stop of the motor does not occur, it can be switched stably. As a result, a motor control device that can operate more safely can be provided.
[0054]
Each torque pattern may be stored according to the motor load. A torque pattern corresponding to the load torque may be selected from a plurality of torque patterns. As a result, the voltage and current are controlled according to the load torque, so that the efficiency of the motor can be improved more accurately. As a result, a motor control device that can be driven more accurately can be provided.
[0055]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[Brief description of the drawings]
FIG. 1 is a block diagram of a control device according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a control procedure of processing for controlling current and the like according to the embodiment of the present invention.
FIG. 3 is a diagram illustrating a method in which the detection unit according to the embodiment of the present invention detects a rotor position signal based on an induced voltage.
FIG. 4 is a diagram showing a relationship between a state, a mechanical angle, and an electrical angle and an energization mode according to the embodiment of the present invention.
FIG. 5 is a diagram illustrating an example of a torque pattern stored in a memory circuit of a microprocessor according to an embodiment of the present invention.
FIG. 6 is a diagram showing load torque, torque compensation amount, and DC current waveform when torque control is not performed.
FIG. 7 is a diagram showing a load torque, a torque compensation amount, and a DC current waveform when performing torque control of a conventional example.
FIG. 8 is a diagram showing a load torque, a torque compensation amount, and a DC current waveform when performing torque control according to the embodiment of the present invention.
FIG. 9 is a diagram representing the vibration amplitude and efficiency of the compressor when performing torque control according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Control apparatus, 110 AC power supply, 120 Power factor improvement circuit, 130 Full wave rectification circuit, 140 Smoothing circuit, 150 Inverter part, 160 Three-phase brushless motor, 170 Compressor, 180 Base driver part, 190 Detection part, 200 microprocessor .

Claims (10)

Power supply means for supplying power to a motor having a rotor;
Detection means for detecting the mechanical angle of the rotor;
You correct one of the voltage and current before SL power, storage means for previously storing a plurality of correction values corresponding to the mechanical angle,
Selecting means for selecting one correction value from among a plurality of correction values stored in advance by the storage means;
Based on the correction value selected by the selecting unit, viewed contains a control means for controlling one of the voltage and current in the power,
The plurality of correction values stored in advance by the storage means are:
A first correction value determined on the basis of a first torque pattern, wherein a torque compensation amount during torque control equalizes current pulsation caused by load torque when the torque control is not performed;
The torque compensation quantity during the torque control, the are set to match the load torque of the case without the torque control, the second correction value and the including determined based on the second torque pattern, the motor Control device. Wherein the first correction value, a current caused by the load torque of the case of driving the phase of the pulsation of the current torque compensation quantity during the torque control by the first correction value Ru generates, the motor without the torque control 2. The motor control device according to claim 1, wherein a deviation from a pulsation phase obtained by vertically inverting the pulsation is a value determined based on the first torque pattern in a predetermined range. The second correction value, in the range where the torque compensation quantity during the torque control by the second correction value phase, the shift of the phase of the load torque of the case without the torque control predetermined said first The motor control device according to claim 1, wherein the motor control device is a value determined based on a two-torque pattern . The power supply means is an inverter,
4. The motor control device according to claim 1, wherein the control unit includes a unit for controlling either a voltage or a current of DC power supplied to the inverter. 5. The storage means further stores correction values other than the first correction value and the second correction value, and the other correction values stored in the storage means are either the voltage or current by the control means. and the current pulsation phase generated by controlling the deviation of the current pulsation phase due to the load torque of the case without the torque control is defined et is to be included in a predetermined range,
Said selection means, based on a predetermined condition, the first correction value, you select one of the values in said second correction value and the other correction values, one of claims 1 to 4 A control device for a motor according to claim 1.   The motor control apparatus according to claim 5, wherein the condition is a condition affected by a load applied to the motor.   The motor control device according to claim 6, wherein the condition affected by the load applied to the motor is a condition determined based on a load torque of the motor. The control device further includes calculation means for calculating an angular velocity of the rotor based on a mechanical angle of the rotor detected by the detection means,
The motor control device according to claim 6, wherein a condition affected by a load applied to the motor is determined based on an angular velocity of the rotor.   An air conditioner including the motor control device according to claim 1.   A refrigerator comprising the motor control device according to claim 1.

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