WO2023175893A1 - 駆動装置及び空気調和装置 - Google Patents

駆動装置及び空気調和装置 Download PDF

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Publication number
WO2023175893A1
WO2023175893A1 PCT/JP2022/012596 JP2022012596W WO2023175893A1 WO 2023175893 A1 WO2023175893 A1 WO 2023175893A1 JP 2022012596 W JP2022012596 W JP 2022012596W WO 2023175893 A1 WO2023175893 A1 WO 2023175893A1
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WIPO (PCT)
Prior art keywords
connection
switching
magnetic flux
electric motor
value
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Ceased
Application number
PCT/JP2022/012596
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English (en)
French (fr)
Japanese (ja)
Inventor
央 大城
貴彦 小林
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2022/012596 priority Critical patent/WO2023175893A1/ja
Priority to JP2024507396A priority patent/JP7665095B2/ja
Publication of WO2023175893A1 publication Critical patent/WO2023175893A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays

Definitions

  • the present disclosure relates to a drive device that uses an inverter to drive an electric motor whose wiring state can be switched, and an air conditioner that includes the drive device.
  • Patent Document 1 discloses a method of estimating magnetic flux information including induced voltage and secondary magnetic flux using an adaptive observation device.
  • the success or failure of the wiring connection is determined by comparing values corresponding to the induced voltage constants before and after the wiring connection switching. If the compressor motor is a permanent magnet type motor and the motor is demagnetized, the problem with conventional technology is that it is difficult to determine whether to switch because the induced voltage constant is smaller than the expected value.
  • the present disclosure has been made in view of the above, and an object of the present disclosure is to provide a drive device that can appropriately determine the success or failure of wire connection switching, regardless of the demagnetization level of the electric motor.
  • a drive device includes a converter that rectifies an AC voltage supplied from an AC power source, and a set rotation speed that corresponds to a set rotation speed from the rectified voltage obtained by the converter.
  • An inverter that generates an alternating current voltage and supplies it to the motor, a connection switching device that switches the connection state of the motor windings according to a switching command, a detection unit that detects the load current of the motor, and controls the inverter and the connection switching device. It has a control section.
  • the control unit estimates the secondary magnetic flux before switching, and calculates the estimated value of the secondary magnetic flux before switching and the preset induction in the state of the first connection.
  • the demagnetization level is determined by comparing it with the voltage constant, and after switching to the second connection is performed by the connection switching device, the secondary magnetic flux after switching is estimated, and the secondary magnetic flux after switching is estimated.
  • the success or failure of connection switching is determined by comparing the value with a value obtained by correcting a preset induced voltage constant in the second connection state based on the demagnetization level.
  • the drive device has the effect that it is possible to appropriately determine the success or failure of wire connection switching, regardless of the demagnetization level of the electric motor.
  • a diagram showing the configuration of a drive device according to Embodiment 1 A diagram showing details of the stator winding and connection switching device of the electric motor according to Embodiment 1.
  • Wiring diagram showing details of a switching device of a wiring switching device included in the drive device according to Embodiment 1 A diagram conceptually showing the connection state of the stator windings when the motor is Y-connected.
  • a diagram for explaining a control sequence when switching connections in Embodiment 1 A diagram showing the configuration of an air conditioner according to Embodiment 2
  • FIG. 1 is a diagram showing the configuration of a drive device 100 according to the first embodiment.
  • the drive device 100 is a device that drives the electric motor 1 connected to the load 5, and includes a converter 3, an inverter 4, a connection switching device 20, and a control section 30. Also shown in FIG. 1 are a motor 1, an AC power source 2, and a load 5.
  • the converter 3 receives the AC voltage supplied from the AC power supply 2, rectifies the AC voltage, and outputs the DC voltage.
  • the DC voltage output from converter 3 may be referred to as "bus voltage.”
  • the converter 3 may be a converter that performs rectification using a diode bridge, or may be a boost converter that can increase the bus voltage using a reactor and a switching element controlled by the control unit 30. .
  • the inverter 4 is controlled by the control unit 30 and generates an AC voltage corresponding to the set rotational speed from the rectified voltage obtained by the converter 3 and supplies it to the electric motor 1. More specifically, the inverter 4 converts the DC voltage output from the converter 3 into an AC voltage whose voltage is variable and whose frequency is variable, and drives the motor 1.
  • the control unit 30 controls the inverter 4 based on the load current to the electric motor 1 that the inverter 4 outputs.
  • the drive device 100 further includes detection units 6a and 6b that detect the load current of the electric motor 1.
  • the detection units 6a and 6b may be a known current sensor such as ACCT (Alternating Current Transformer) or DCCT (Direct Current Transformer) that directly detects the load current of the motor 1 as shown in FIG.
  • the detection method or estimation method performed by the detection units 6a and 6b is not limited. Information on the load current detected by the detection units 6a and 6b is taken into the control unit 30.
  • the motor 1 is a three-phase synchronous motor, and the ends of the stator windings are drawn out to the outside of the motor 1, and the windings of the motor 1 can be Y-connected or ⁇ -connected. .
  • the Y connection is a star connection
  • the ⁇ connection is a delta connection.
  • the connection switching device 20 switches the connection state of the windings of the electric motor 1 according to a switching command. That is, the connection switching device 20 selects the connection of the electric motor 1.
  • the connection switching device 20 includes switching devices 21, 22, and 23.
  • the control unit 30 controls which connection to drive the electric motor 1, the Y connection or the ⁇ connection.
  • FIG. 2 is a diagram showing details of the stator winding and connection switching device 20 of the electric motor 1 according to the first embodiment.
  • the first ends 41a, 42a, 43a of the three-phase windings 41, 42, 43 consisting of the U-phase, V-phase, and W-phase of the electric motor 1 are connected to the outside of the drive device 100. It is connected to terminals 41c, 42c, and 43c.
  • the first end 41a is connected to the external terminal 41c of the drive device 100
  • the first end 42a is connected to the external terminal 42c of the drive device 100
  • the first end 41a is connected to the external terminal 42c of the drive device 100.
  • 43a is connected to an external terminal 43c of the drive device 100.
  • the first ends 41a, 42a, 43a are also connected to the U-phase, V-phase, and W-phase outputs of the inverter 4.
  • the second ends 41b, 42b, 43b of the three phase windings 41, 42, 43 of the electric motor 1 are connected to external terminals 41d, 42d, 43d of the drive device 100.
  • the second end 41b is connected to the external terminal 41d of the drive device 100
  • the second end 42b is connected to the external terminal 42d of the drive device 100
  • the second end 41b is connected to the external terminal 41d of the drive device 100.
  • 43b is connected to an external terminal 43d of the drive device 100.
  • the external terminals 41c, 42c, 43c, 41d, 42d, and 43d are connected to the connection switching device 20.
  • the connection switching device 20 has the switching devices 21, 22, and 23 as described above.
  • the current flowing through the winding 41 flows through the switch 21, the current flowing through the winding 42 flows through the switch 22, and the current flowing through the winding 43 flows through the switch 23.
  • the switch 21 has the function of switching the path of the current flowing through the winding 41
  • the switch 22 has the function of switching the path of the current flowing through the winding 42
  • the switch 23 has the function of switching the path of the current flowing through the winding 43. It has the function of switching the path of flowing current.
  • electromagnetic contactors whose contacts are electromagnetically opened and closed are used.
  • the electromagnetic contactor includes components called a relay and a contactor.
  • the configuration of the electromagnetic contactor is, for example, the configuration shown in FIG. The connection status will be different.
  • FIG. 3 is a wiring diagram showing details of the switches 21, 22, and 23 of the connection switching device 20 included in the drive device 100 according to the first embodiment.
  • the connection state between the excitation coils 211, 221, 231 and the power supply 25 is switched by the semiconductor switch 204 controlled by the connection selection signal Sc output from the control unit 30, and the presence or absence of current is switched. is also switched.
  • the connection selection signal Sc indicates the first value
  • the semiconductor switch 204 is turned off, no current flows through the excitation coils 211, 221, and 231, and the connection selection signal Sc indicates the second value. If so, the semiconductor switch 204 is turned on, and current flows to the excitation coils 211, 221, and 231.
  • the first value is, for example, Low, and the second value is, for example, High. If the connection selection signal Sc is output from a circuit with sufficient current capacity, the exciting coils 211, 221, 231 may be directly driven by the connection selection signal Sc without using the semiconductor switch 204.
  • the common contact 21c is connected to the external terminal 41d via a lead wire, the normally closed contact 21b is connected to the neutral node 24, and the normally open contact 21a is connected to the W phase of the inverter 4. connected to the output.
  • the common contact 22c is connected to the external terminal 42d via a lead wire, the normally closed contact 22b is connected to the neutral node 24, and the normally open contact 22a is connected to the V phase of the inverter 4. connected to the output.
  • the common contact 23c is connected to the external terminal 43d via a lead wire, the normally closed contact 23b is connected to the neutral node 24, and the normally open contact 23a is connected to the U phase of the inverter 4. connected to the output.
  • the switches 21, 22, 23 are switched to the normally open contacts 21a, 22a, 23a, contrary to the case shown in FIG. That is, the common contacts 21c, 22c, and 23c are connected to the normally open contacts 21a, 22a, and 23a.
  • the second ends 41b, 42b, 43b of the windings 41, 42, 43 are connected to the first ends 42a, 43a of the windings 43, 42, 41 via the switch 21, 22, 23. , 41a. Therefore, the connection state of the electric motor 1 is a ⁇ connection state.
  • connection selection signal Sc indicates the first value, for example Low
  • the motor 1 is in the Y connection state
  • connection selection signal Sc indicates the second value, for example High
  • the motor 1 is in the ⁇ connection state. becomes the state of
  • FIG. 4 is a diagram conceptually showing the connection state of the stator windings when the electric motor 1 is connected in a Y-connection.
  • FIG. 5 is a diagram conceptually showing the connection state of the stator windings when the electric motor 1 is connected in a ⁇ connection.
  • ⁇ aY ⁇ 3 ⁇ a ⁇ ...(3) ⁇ aY is an induced voltage constant during Y connection, and ⁇ a ⁇ is an induced voltage constant during ⁇ connection.
  • the allowable current of the motor 1 also differs between Y-connection and ⁇ -connection, and the allowable current is larger in ⁇ -connection.
  • the current value can be reduced to 1/ ⁇ 3 of the ⁇ connection.
  • the number of turns can be designed to be suitable for driving at low speeds with a Y connection, and the current value can be reduced compared to when a Y connection is used over the entire speed range. This makes it possible to increase the efficiency of driving 1. Note that low speed rotation corresponds to a small load.
  • the control unit 30 controls the inverter 4 and the connection switching device 20.
  • the control unit 30 controls the inverter 4 to change the frequency and voltage value of the output voltage from the inverter 4.
  • the control unit 30 controls the connection switching device 20 to select the connection of the electric motor 1 .
  • control unit 30 also controls the boost converter to change the bus voltage.
  • FIG. 6 is a diagram showing the configuration of the control section 30 included in the drive device 100 according to the first embodiment.
  • FIG. 6 shows all the components that the drive device 100 has, the electric motor 1, the AC power source 2, and the load 5.
  • control section 30 includes an operation command section 31 and an inverter control section 32, and, when converter 3 is a boost converter, also has a control section for controlling the boost converter.
  • the operation command unit 31 outputs a frequency command value ⁇ * , a zero selection signal Sz, and a connection selection signal Sc.
  • the frequency command value ⁇ * and the zero selection signal Sz are supplied to the inverter control section 32.
  • the frequency command value ⁇ * is set to a value suitable for the operating state.
  • the converter 3 is a boost converter
  • the bus voltage command value is set to a value suitable for the operating state, and the bus voltage is boosted to an arbitrary value.
  • the inverter control unit 32 outputs a PWM (Pulse Width Modulation) signal Sm that controls the switching operation of the inverter 4 to the inverter 4, and changes the frequency and voltage value of the output voltage of the inverter 4.
  • PWM Pulse Width Modulation
  • the connection selection signal Sc indicates a first value, for example, Low, when the Y connection is selected, and indicates a second value, for example, High, when the ⁇ connection is selected.
  • the zero selection signal Sz normally indicates a first value, eg, Low, and indicates a second value, eg, High, during the period of zero current control, which will be described later.
  • the operation command unit 31 determines whether the stator windings of the electric motor 1 are Y-connected or ⁇ -connected, determines the target rotation speed, and determines the success or failure of switching the connections, and issues a connection selection signal based on the determination.
  • Sc, frequency command value ⁇ * , and inverter stop signal So are output.
  • the inverter stop signal So normally indicates a first value, e.g., Low, when there is no abnormality in the connection state, and when it is determined that the switching has failed in the connection switching success/failure determination described later, it takes a second value, e.g. Indicates High.
  • the operation command unit 31 decides to connect the electric motor 1 to a ⁇ connection when the difference between the room temperature and the set temperature is large, and selects the connection.
  • a frequency command value ⁇ * that sets the signal Sc to a second value for example, a signal indicating High
  • sets the target rotation speed to a relatively high value and gradually increases the frequency to the frequency corresponding to the target rotation speed after startup.
  • Output When the frequency reaches the frequency corresponding to the target rotational speed, the operation command unit 31 maintains the state until the room temperature approaches the set temperature, and when the room temperature approaches the set temperature, switches the connection of the electric motor 1 to the Y connection. Therefore, the connection selection signal Sc is set to a first value, for example, a signal indicating Low, and then control is performed to maintain the room temperature close to the set temperature. This control includes frequency adjustment, stopping and restarting the electric motor 1, and the like.
  • the motor 1 is a three-phase synchronous motor
  • the induced voltage constant ⁇ a and the value of the secondary magnetic flux ⁇ dr are the same value, so the connection state is determined based on the change in the estimated value of the secondary magnetic flux ⁇ dr. be able to.
  • demagnetization or magnetization occurs due to the temperature dependence of the permanent magnet. For example, if the permanent magnets constituting the electric motor 1 are magnets that demagnetize at high temperatures, irreversible demagnetization occurs where the magnetic force does not return to its original state when the temperature exceeds a certain temperature, and the performance of the electric motor 1 is significantly reduced.
  • the induced voltage constant ⁇ a in the first connection state before switching the connection and the induced voltage constant ⁇ a in the second connection state after switching the connection are set in advance. For example, a design value when the electric motor 1 was designed may be used as the set value of the induced voltage constant ⁇ a.
  • the control unit 30 estimates the secondary magnetic flux ⁇ dr before switching the wiring connection. As a method for estimating the secondary magnetic flux ⁇ dr, as described above, Patent Document 2 discloses a method of estimating magnetic flux information including the induced voltage and the secondary magnetic flux ⁇ dr using an adaptive observation device. The control unit 30 estimates the secondary magnetic flux ⁇ dr by using a method similar to this method.
  • the control unit 30 calculates the demagnetization level based on the following equation (4) by comparing the estimated value of the secondary magnetic flux ⁇ dr and a preset induced voltage constant ⁇ a in the first connection state.
  • Demagnetization level value (%) estimated value of secondary magnetic flux ⁇ dr/induced voltage constant ⁇ a ⁇ 100 (4)
  • the control unit 30 estimates the value of the secondary magnetic flux ⁇ dr after switching the connection, and calculates the value of the induced voltage constant ⁇ a after switching the connection, that is, in the second connection state.
  • the determination is made in consideration of the demagnetization level obtained by equation (4).
  • the control unit 30 After the connection switching operation is performed, the control unit 30 re-estimates the secondary magnetic flux ⁇ dr after switching the connection, and calculates the estimated value of the secondary magnetic flux ⁇ dr and the preset value in the second connection state after switching the connection.
  • the induced voltage constant ⁇ a is compared with the induced voltage constant ⁇ a to determine the success or failure of the connection switching.
  • the judgment value K is determined, and the control unit 30 compares the correction calculation result of the following correction formula (5) with the judgment value K, and switches if the calculation result is less than the absolute value of the judgment value K. is determined to be normal. (Estimated value of secondary magnetic flux ⁇ dr) - (induced voltage constant ⁇ a x demagnetization level value (%)/100) ... (5)
  • the control unit 30 determines the judgment value K to a positive or negative value, taking into account the variation in control convergence after switching the wiring, which affects the estimated value of the secondary magnetic flux ⁇ dr in addition to the influence of demagnetization.
  • the judgment is performed with a likelihood of . More specifically, when determining the success or failure of connection switching, the control unit 30 determines whether the estimated value of the secondary magnetic flux ⁇ dr after switching and the preset induced voltage constant ⁇ a in the state of the second connection are based on the demagnetization level. When comparing the corrected value, the determination value K is given a positive or negative likelihood to determine whether the connection switching is successful or not. Thereby, the drive device 100 can prevent determining that the switching has failed even though the switching of the wire connections has been performed normally.
  • control unit 30 determines that the switching has failed in the connection switching success/failure determination, the control unit 30 deactivates the PWM signal Sm by setting the inverter stop signal So to a second value, for example, a signal indicating High, and stops the electric motor 1.
  • the control unit 30 determines that the switching state is abnormal as a result of the connection switching success/failure determination, it performs an operation to stop the electric motor 1 .
  • the operation command unit 31 changes the value of the connection selection signal Sc for switching from one of the Y connection and the ⁇ connection to the other, and also temporarily changes the value of the zero selection signal Sz during the connection switching operation. change to
  • the operation command unit 31 when switching the connection, temporarily changes the zero selection signal Sz, which normally indicates Low, to a signal which indicates High. During the period in which the zero selection signal Sz is High, the operation command unit 31 switches the connection selection signal Sc from a High signal to a Low signal, or from a Low signal to a High signal.
  • the inverter control unit 32 In order to control the inverter 4, the inverter control unit 32 generates a PWM signal Sm and supplies it to the inverter 4 based on information supplied from the detection unit that detects the load current of the electric motor 1.
  • the inverter 4 supplied with the PWM signal Sm drives the electric motor 1 by changing the output voltage value and frequency according to the PWM signal Sm.
  • FIG. 6 shows an example in which the load current of the motor 1 is estimated from information about the bus current Idc.
  • connection switching device 20 If the current flowing through the connection switching device 20 is controlled to be zero and the connection switching device 20 is made to perform a switching operation in that state, arc discharge will occur between the contacts of the switching devices 21, 22, and 23 during switching. This can be prevented. In this way, there is no need to reduce the rotational speed of the electric motor 1 to zero for switching.
  • connection switching device 20 In order to make the current flowing through the connection switching device 20 zero, there is a method of detecting the current flowing through the motor 1 and controlling the current flowing to zero by the switching operation of the inverter 4. Alternatively, there is a method of cutting off the current by stopping the switching operation of the inverter 4. Alternatively, by using both of these methods in combination, it is possible to achieve zero current flowing through the connection switching device 20.
  • FIG. 7 is a diagram for explaining a control sequence when wiring connections are switched in the first embodiment. In FIG. 7, switching from Y connection to ⁇ connection is assumed.
  • FIG. 7(A) shows the current flowing through the connection switching device 20.
  • FIG. 7(B) shows a time chart of the zero selection signal Sz.
  • FIG. 7(C) shows a time chart of the connection selection signal Sc.
  • FIG. 7(D) shows the estimated value of the secondary magnetic flux ⁇ dr and the induced voltage constant ⁇ a.
  • the control unit 30 estimates the secondary magnetic flux ⁇ dr before switching and calculates the demagnetization level of the electric motor 1. After switching the wiring connection, the time constant of the control response until the control becomes stable when the current is passed through the motor 1 again, and the convergence speed in estimating the secondary magnetic flux ⁇ dr, the secondary magnetic flux ⁇ dr immediately after the switching of the wiring connection is determined. There is a risk that an incorrect estimate will be made.
  • the control unit 30 estimates the secondary magnetic flux ⁇ dr again, and Determine the success or failure of switching.
  • control unit 30 can determine that the switching has failed even though the switching of the wiring has been performed normally, or that the switching has been performed normally even though the switching has failed. It is possible to prevent the determination that the
  • the control unit 30 included in the drive device 100 estimates the secondary magnetic flux before switching, and estimates the secondary magnetic flux before switching.
  • the demagnetization level is determined by comparing the estimated value of the secondary magnetic flux and the preset induced voltage constant in the state of the first connection, and the connection switching device 20 switches to the second connection. , estimate the secondary magnetic flux after switching, and compare the estimated value of the secondary magnetic flux after switching with a value in which a preset induced voltage constant in the state of the second connection is corrected based on the demagnetization level. This determines the success or failure of connection switching.
  • the drive device 100 compares the estimated value of the secondary magnetic flux ⁇ dr after switching the wiring connection with the preset value of the induced voltage constant ⁇ a in the state after switching the wiring connection, which is corrected based on the demagnetization level. Thus, regardless of the demagnetization level of the electric motor 1, it is possible to appropriately determine the success or failure of wiring connection switching.
  • FIG. 8 is a diagram showing the configuration of an air conditioner 200 according to the second embodiment.
  • Air conditioner 200 includes drive device 100 described in Embodiment 1.
  • drive device 100 drives electric motor 1 that drives compressor 904 included in air conditioner 200. That is, the air conditioner 200 has the electric motor 1 driven by the drive device 100.
  • the air conditioner 200 further includes a compressor 904 that compresses the refrigerant of the refrigeration cycle 900 using the electric motor 1 as a drive source.
  • the refrigeration cycle 900 can perform heating operation or cooling operation by switching the four-way valve 902.
  • heating operation as shown by the solid arrow, the refrigerant is pressurized by the compressor 904 and sent out, and the four-way valve 902, the indoor heat exchanger 906, the expansion valve 908, the outdoor heat exchanger 910, and the four-way valve 902 are compressed. and returns to the compressor 904.
  • cooling operation as indicated by the dashed arrow, the refrigerant is pressurized by the compressor 904 and sent out, passing through the four-way valve 902, the outdoor heat exchanger 910, the expansion valve 908, the indoor heat exchanger 906, and the four-way valve 902. and returns to the compressor 904.
  • the drive device 100 connected to the AC power source 2 performs variable speed control to drive the electric motor 1, and the electric motor 1 drives the compressor 904.
  • indoor heat exchanger 906 functions as a condenser
  • outdoor heat exchanger 910 functions as an evaporator
  • the outdoor heat exchanger 910 functions as a condenser
  • the indoor heat exchanger 906 functions as an evaporator to absorb heat.
  • the expansion valve 908 reduces the pressure of the refrigerant and expands it.
  • the pressure ratio of the compressor 904 changes depending on the degree of indoor temperature adjustment, and if the indoor set temperature and the indoor actual temperature are significantly different, the drive device 100 increases the rotational speed of the electric motor 1, Creates a highly compressed state.
  • the air conditioner 200 since the air conditioner 200 according to the second embodiment includes the drive device 100 described in the first embodiment, the electric motor 1 is activated in accordance with the driving situation without stopping the compressor 904. Connections can be switched, and air conditioning operation can be continued. That is, the air conditioner 200 can improve user comfort. In addition, since the connection switching success/failure determination is performed correctly, the air conditioner 200 can stop the inverter 4 included in the drive device 100 when the connection switching is abnormal, and the air conditioner 200 can continue to operate in a state where the connection is abnormal. This can be prevented.
  • FIG. 9 is a diagram showing the processor 91 in a case where part or all of the control unit 30 included in the drive device 100 according to the first embodiment is implemented by the processor 91. That is, some or all of the functions of the control unit 30 may be realized by the processor 91 that executes a program stored in the memory 92.
  • the processor 91 is a CPU (Central Processing Unit), a processing system, an arithmetic system, a microprocessor, or a DSP (Digital Signal Processor).
  • a memory 92 is also shown in FIG.
  • control unit 30 When some or all of the functions of the control unit 30 are realized by the processor 91, some or all of the functions are realized by the processor 91, software, firmware, or a combination of software and firmware. Software or firmware is written as a program and stored in memory 92. The processor 91 implements some or all of the functions of the control unit 30 by reading and executing programs stored in the memory 92 .
  • the drive device 100 stores a program that results in some or all of the steps executed by the control unit 30. It has a memory 92 for storing data. It can be said that the program stored in the memory 92 causes the computer to execute at least part of the procedure or method executed by the control unit 30.
  • the memory 92 is, for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory). ) etc. non-volatile Alternatively, it may be a volatile semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disk), or the like.
  • FIG. 10 is a diagram showing a processing circuit 93 in a case where part or all of the control unit 30 included in the drive device 100 according to the first embodiment is implemented by the processing circuit 93. That is, part or all of the control unit 30 may be realized by the processing circuit 93.
  • the processing circuit 93 is dedicated hardware.
  • the processing circuit 93 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. It is.
  • a part of the control unit 30 may be realized by dedicated hardware separate from the rest of the control unit 30.
  • some of the plurality of functions may be realized by software or firmware, and the remainder of the plurality of functions may be realized by dedicated hardware. In this way, the plurality of functions of the control unit 30 can be realized by hardware, software, firmware, or a combination thereof.

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  • Control Of Ac Motors In General (AREA)
PCT/JP2022/012596 2022-03-18 2022-03-18 駆動装置及び空気調和装置 Ceased WO2023175893A1 (ja)

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WO2019008756A1 (ja) * 2017-07-07 2019-01-10 三菱電機株式会社 モータ駆動システム及び空気調和機
WO2019021373A1 (ja) * 2017-07-25 2019-01-31 三菱電機株式会社 駆動装置、圧縮機、空気調和機および駆動方法

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