WO2021171562A1 - Dispositif d'entraînement de moteur électrique et climatiseur - Google Patents

Dispositif d'entraînement de moteur électrique et climatiseur Download PDF

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Publication number
WO2021171562A1
WO2021171562A1 PCT/JP2020/008339 JP2020008339W WO2021171562A1 WO 2021171562 A1 WO2021171562 A1 WO 2021171562A1 JP 2020008339 W JP2020008339 W JP 2020008339W WO 2021171562 A1 WO2021171562 A1 WO 2021171562A1
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WO
WIPO (PCT)
Prior art keywords
voltage
converter
switching
connection state
motor
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Application number
PCT/JP2020/008339
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English (en)
Japanese (ja)
Inventor
雅皓 鈴木
圭一朗 志津
知宏 沓木
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to PCT/JP2020/008339 priority Critical patent/WO2021171562A1/fr
Publication of WO2021171562A1 publication Critical patent/WO2021171562A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Definitions

  • the present disclosure relates to a motor drive device for driving a motor and an air conditioner provided with the motor drive device.
  • Patent Document 1 discloses an electric motor drive device including a winding switching electric motor as a technique for improving efficiency in an air conditioner.
  • the winding switching motor has a plurality of stator windings (hereinafter, simply referred to as “windings”) with both ends open, and switches the connection state of the windings between the star connection and the delta connection. It is an electric motor that can be used.
  • the present disclosure has been made in view of the above, and an object of the present disclosure is to obtain an electric motor drive device capable of further improving efficiency in a product equipped with a winding switching electric motor.
  • the motor drive device has a plurality of windings, and the connection state of the windings is between the first connection state and the second connection state. It is an electric motor drive device that drives an electric motor, which is a winding switching electric motor configured to be mutually switchable.
  • the electric motor drive device has at least one first switching element, a converter that converts an AC voltage output from an AC power supply into a DC voltage, and boosts the DC voltage if necessary, and a DC voltage output from the converter. It is provided with a smoothing capacitor for smoothing.
  • the motor drive device has a plurality of second switching elements, converts the DC voltage smoothed by the smoothing capacitor into the drive voltage to the motor and applies it to the motor, the operation of the converter and the inverter, and the operation of the converter and the inverter. It is provided with a control unit that controls switching of the connection state of the winding. The control unit switches the presence / absence of the boosting operation in the converter according to the connection state of the winding.
  • the motor drive device According to the motor drive device according to the present disclosure, there is an effect that the efficiency can be further improved in the product equipped with the winding switching motor.
  • the figure which shows the 1st connection state in the motor shown in FIG. The figure which shows the 2nd connection state in the motor shown in FIG.
  • Time chart used to explain the rectification control in the converter of the first embodiment The figure which shows the 1st path of the alternating current flowing through the converter of Embodiment 1.
  • Flow chart used to explain the operation of the main part in the first embodiment A block diagram showing an example of a hardware configuration that realizes the function of the control unit according to the first embodiment.
  • FIG. 1 is a diagram showing a configuration example of the motor drive device 100 according to the first embodiment.
  • the electric motor driving device 100 according to the first embodiment is a device for driving an electric motor 70 which is a winding switching electric motor.
  • the motor drive device 100 drives the motor 70 by converting the AC voltage output from the single-phase AC power supply 10 into a DC voltage, converting the converted DC voltage into an AC voltage again, and applying it to the motor 70.
  • the motor drive device 100 includes a converter 30, a smoothing capacitor 40, an inverter 50, a connection switching unit 60, and a control unit 80.
  • the control unit 80 controls the converter 30 and the connection switching unit 60 based on the rotation speed of the electric motor 70. The details of this control will be described later.
  • the converter 30 is a boost converter that converts the AC voltage output from the AC power supply 10 into a DC voltage by the on and off operations of the switching element described later, and boosts the DC voltage if necessary.
  • the converter 30 can perform an operation of increasing the voltage value of the converted DC voltage, that is, a boosting operation.
  • the operation of converting the AC voltage output from the AC power supply 10 into a DC voltage is called "rectification operation”.
  • the converter 30 performs the rectifying operation and the boosting operation under the control of the control unit 80 while performing the rectifying operation.
  • the converter 30 includes a reactor 20 and a rectifier circuit 22.
  • the rectifier circuit 22 includes switching elements 31, 32, 33, 34.
  • the switching elements 31 and 33 are connected in series to form the first leg 23.
  • the switching elements 32 and 34 are connected in series to form a second leg 24.
  • the first leg 23 and the second leg 24 are connected in parallel with each other.
  • connection point 25 of the switching elements 31 and 33 is connected to one side of the AC power supply 10 via the reactor 20.
  • the connection point 26 of the switching elements 32 and 34 is connected to the other side of the AC power supply 10 without going through the reactor 20.
  • the reactor 20 may be connected to the other side of the AC power supply 10. Further, the reactor 20 may be divided into two, and the two divided reactors 20 may be connected to both one side and the other side of the AC power supply 10.
  • the rectifier circuit 22 has a connection form in which an AC voltage output from the AC power supply 10 is applied between the connection point 25 and the connection point 26 via the reactor 20.
  • Each of the switching elements 31, 32, 33, and 34 includes a transistor element and a diode connected in antiparallel to the transistor element.
  • Each of the switching elements 31, 32, 33, and 34 may be referred to as a "first switching element”.
  • MOSFETs Metal Oxide Semiconductor Field Effect Transistors
  • a MOSFET is a switching element capable of passing a current in both directions between a drain and a source. Any switching element may be used as long as it is a switching element capable of bidirectionally flowing a current between the first terminal corresponding to the drain and the second terminal corresponding to the source.
  • antiparallel means that the first terminal corresponding to the drain of the MOSFET and the cathode of the diode are connected, and the second terminal corresponding to the source of the MOSFET and the anode of the diode are connected.
  • a parasitic diode that the MOSFET itself has inside may be used.
  • Parasitic diodes are also called body diodes. When using a parasitic diode, the diode connected in antiparallel may be omitted.
  • At least one of the switching elements 31, 32, 33, and 34 is not limited to a MOSFET formed of a silicon-based material, and has a wide band gap (Wide Band Gap) such as silicon carbide, gallium nitride, gallium oxide, or diamond. : WBG) MOSFET formed of semiconductor may be used.
  • WBG semiconductors have lower loss than silicon semiconductors. Therefore, by forming these semiconductor elements using WBG semiconductors, a low-loss device can be configured. Further, the WBG semiconductor has a higher withstand voltage than the silicon semiconductor. Therefore, the withstand voltage resistance and the allowable current density of the semiconductor element are increased, and the semiconductor module incorporating the semiconductor switching element can be miniaturized. Further, since the WBG semiconductor has high heat resistance, it is possible to miniaturize the heat radiating part for radiating the heat generated by the semiconductor module, and it is possible to simplify the heat radiating structure for radiating the heat generated by the semiconductor module. Is.
  • switching elements 31, 32, 33, and 34 may use diodes instead of switching elements. That is, at least one of the switching elements 31, 32, 33, and 34 may be a switching element. Even with such an alternative configuration, the boosting operation described later is possible.
  • the smoothing capacitor 40 is connected to the output end of the converter 30.
  • the smoothing capacitor 40 smoothes the DC voltage output from the converter 30.
  • the inverter 50 includes switching elements 51, 52, 53, 54, 55, 56.
  • the switching elements 51 and 54 are connected in series to form a leg 57.
  • the switching elements 52 and 55 are connected in series to form a leg 58.
  • the switching elements 53 and 56 are connected in series to form a leg 59.
  • the legs 57, 58 and 59 are connected in parallel with each other.
  • Each of the switching elements 51, 52, 53, 54, 55, and 56 may be referred to as a "second switching element".
  • FIG. 1 illustrates a case where the switching elements 51, 52, 53, 54, 55, and 56 are insulated gate bipolar transistors (Insulated Gate Bipolar Transistors: IGBTs), but the present invention is not limited to this. MOSFETs may be used instead of the IGBTs.
  • IGBTs Insulated Gate Bipolar Transistors
  • Each of the switching elements 51, 52, 53, 54, 55, 56 includes an IGBT and a diode connected to the IGBT in antiparallel.
  • the antiparallel means that the anode side of the diode is connected to the first terminal corresponding to the emitter of the IGBT and the cathode side of the diode is connected to the second terminal corresponding to the collector of the IGBT, as in the case of the converter 30. do.
  • each MOSFET may be formed of a wide bandgap semiconductor such as silicon carbide, gallium nitride, gallium oxide, or diamond.
  • a MOSFET formed of a wide bandgap semiconductor the effects of low loss, high withstand voltage and high heat resistance can be enjoyed.
  • the control unit 80 generates control signals S31 to S34 for controlling each switching element in the converter 30.
  • the control signal S31 is a control signal for controlling the switching element 31.
  • the control signal S32 is a control signal for controlling the switching element 32.
  • the control signal S33 is a control signal for controlling the switching element 33.
  • the control signal S34 is a control signal for controlling the switching element 34.
  • the control signals S31 to S34 generated by the control unit 80 are input to a gate drive circuit (not shown) in the converter 30.
  • the inverter 50 is connected to the motor 70 via the connection switching unit 60.
  • the inverter 50 converts the DC voltage smoothed by the smoothing capacitor 40 into a drive voltage to the motor 70 and applies it to the motor 70.
  • the motor 70 includes a U-phase winding 72U, a V-phase winding 72V, and a W-phase winding 72W.
  • the U-phase winding 72U, the V-phase winding 72V, and the W-phase winding 72W are three-phase windings included in the motor 70. Both ends of the U-phase winding 72U are open. The same applies to the V-phase winding 72V and the W-phase winding 72W.
  • FIG. 2 is a diagram showing a first connection state in the motor 70 shown in FIG.
  • FIG. 3 is a diagram showing a second connection state in the motor 70 shown in FIG.
  • the star connection is referred to as “Y connection” and the delta connection is referred to as “ ⁇ connection”.
  • the first connection state is the state connected to the star connection and the second connection state is the state connected to the delta connection.
  • the connection state shown in FIG. 2 is the first connection state, and the motor 70 is connected to the star connection.
  • the connection state shown in FIG. 3 is the second connection state, and the motor 70 is connected to the delta connection.
  • the connection switching unit 60 has a function of switching the connection state of the three windings included in the motor 70 between the first connection state and the second connection state. Specifically, the connection switching unit 60 switches the connection state of the windings between the star connection and the delta connection by changing the connection destinations at both ends of each open winding.
  • the connection switching unit 60 includes a U-phase switch 61, a V-phase switch 62, and a W-phase switch 63.
  • the U-phase switch 61 is a switching unit for switching the connection destination of the U-phase winding 72U.
  • the V-phase switch 62 is a switching unit for switching the connection destination of the V-phase winding 72V.
  • the W-phase switch 63 is a switching unit for switching the connection destination of the W-phase winding 72W.
  • the contacts of the U-phase switch 61, the V-phase switch 62, and the W-phase switch 63 are individually switched by the switching signals CS1 to CS3 from the control unit 80.
  • the motor drive device 100 controls to switch the presence / absence of the boosting operation in the converter 30 according to the connection state of the windings.
  • the control unit 80 In the case of the boost operation "none", the control unit 80 only controls the converter 30 to perform a rectifying operation. This control is appropriately referred to as “rectification control”. Further, in the case of the boosting operation "Yes”, the control unit 80 controls the converter 30 to perform a rectifying operation and a boosting operation. This control is appropriately referred to as “boost rectification control”.
  • each phase switch is described as a c-contact switch, but the present invention is not limited to these examples.
  • Each phase switch may be a switch that can be opened and closed in both directions.
  • each phase switch may be configured by combining an a-contact switch or a b-contact switch.
  • each phase switch may be a semiconductor switch.
  • FIG. 4 is a diagram used for explaining the relationship between the connection state and efficiency in the motor 70 of the first embodiment.
  • the horizontal axis shows the rotation speed of the motor 70, and the vertical axis shows the efficiency.
  • the "efficiency” referred to here means the operating efficiency of the motor 70 driven by the motor drive device 100.
  • the operating efficiency is the ratio of the mechanical output of the motor 70 to the input power to the motor 70.
  • the efficiency of the motor 70 when the connection state is the star connection is better than the delta connection in the low speed region where the rotation speed is low, but decreases in the high speed region where the rotation speed is high.
  • the efficiency of the motor 70 when the connection state is delta connection is inferior to that of star connection in the low speed region where the rotation speed is low, but is improved in the high speed region where the rotation speed is high.
  • the star connection is more efficient than the delta connection
  • the delta connection is more efficient than the star connection. Therefore, there is a switching point shown in FIG. 4, and if the connection state is switched at this switching point, efficient operation becomes possible.
  • the switching rotation speed at the switching point is indicated by "X".
  • the connection state of the motor 70 is switched to the star connection in the region where the rotation speed is less than X. Further, in the region where the rotation speed exceeds X, the connection state of the motor 70 is switched to the delta connection. If the number of revolutions and X are equal, they may be included in either. That is, when the rotation speed and X are equal, the star connection or the delta connection may be used.
  • connection state of the motor 70 is switched by the switching signals CS1 to CS3 output from the control unit 80 to the connection switching unit 60.
  • the switching rotation speed X is a control parameter determined by the specifications of the electric motor 70, the converter 30, the inverter 50, etc., and specific numerical values are not described here.
  • the rectification control there are two combinations of on and off of the switching elements 31, 32, 33, 34 in the converter 30 except for the state in which all the switching elements are turned off.
  • the switching elements 31 and 34 are on and the switching elements 32 and 33 are off.
  • the switching elements 32 and 33 are on and the switching elements 31 and 34 are off.
  • the rectification operation is performed by these first and second switching states.
  • the timing at which each switching element is turned on or off is not limited.
  • FIG. 5 is a time chart used for explaining the rectification control in the converter 30 of the first embodiment.
  • the horizontal axis of FIG. 5 represents time.
  • the operating waveforms of the AC voltage, the AC current, and the gate signals of the switching elements 31, 32, 33, and 34 are shown in order from the upper stage side.
  • the alternating current is the current that flows in and out of the input side of the converter 30.
  • FIG. 6 is a diagram showing a first path of an alternating current flowing through the converter 30 of the first embodiment.
  • This first path is a current path by synchronous rectification when the AC voltage is positive.
  • the switching elements 31 and 34 are in the on state, and the switching elements 32 and 33 are in the off state. In this switching state, the alternating current flows through the paths of the alternating current power supply 10, the reactor 20, the switching element 31, the smoothing capacitor 40, the switching element 34, and the alternating current power supply 10.
  • This operation is called synchronous rectification, and is effective in reducing the loss in the switching elements 31 and 34. Therefore, if synchronous rectification is applied to each switching element of the converter 30, it is possible to improve the conversion efficiency in the AC / DC conversion control.
  • FIG. 7 is a diagram showing a second path of alternating current flowing through the converter 30 of the first embodiment.
  • This second path is a current path by synchronous rectification when the AC voltage is negative.
  • the switching elements 32 and 33 are in the on state, and the switching elements 31 and 34 are in the off state. In this switching state, the alternating current flows through the paths of the alternating current power supply 10, the switching element 32, the smoothing capacitor 40, the switching element 33, the reactor 20, and the alternating current power supply 10.
  • step-up rectification control there are four combinations of on and off of the switching elements 31, 32, 33, 34 in the converter 30 except for the state in which all the switching elements are turned off. Two of them are the first and second switching states in the above-mentioned rectification control. In the third switching state, which is one of the remaining two ways, the switching elements 33 and 34 are on and the switching elements 31 and 32 are off. Further, in the fourth switching state, which is the other of the remaining two types, the switching elements 31 and 32 are on and the switching elements 33 and 34 are off. The step-up rectification operation is performed by these first to fourth switching states.
  • FIG. 8 is a time chart used for explaining the step-up rectification control in the converter 30 of the first embodiment.
  • the horizontal axis of FIG. 8 represents time.
  • the operating waveforms of the AC voltage, the AC current, and the gate signals of the switching elements 31, 32, 33, and 34 are shown in order from the upper stage side.
  • the operation during the period shown in FIGS. 8 (1) and (2) is the same as the operation during the period shown in FIGS. 5 (1) and (2).
  • FIG. 9 is a diagram showing a third path of alternating current flowing through the converter 30 of the first embodiment.
  • This third path is a current path by boost control when the AC voltage is positive.
  • the switching elements 33 and 34 are in the on state, and the switching elements 31 and 32 are in the off state. In this switching state, the alternating current flows through the paths of the alternating current power supply 10, the reactor 20, the switching element 33, the switching element 34, and the alternating current power supply 10.
  • This operation is called "power short circuit” because it is an operation in which a current flows without passing through the smoothing capacitor 40.
  • FIG. 10 is a diagram showing a fourth path of alternating current flowing through the converter 30 of the first embodiment.
  • This fourth path is a current path by boost control when the AC voltage is negative.
  • the switching elements 31 and 32 are in the on state, and the switching elements 33 and 34 are in the off state.
  • the alternating current flows through the paths of the alternating current power supply 10, the switching element 32, the switching element 31, the reactor 20, and the alternating current power supply 10.
  • This operation is also a power short circuit, and the energy stored in the reactor 20 is released to the smoothing capacitor 40, so that the DC voltage is boosted.
  • the boost rectification control as shown in FIG. 8 is also called pulse voltage amplitude waveform (Pulse Amplifier Modulation: PAM) control.
  • PAM Pulse Amplifier Modulation
  • FIG. 11 is a diagram used for explaining the operation of the main part in the first embodiment.
  • FIG. 12 is a flowchart used for explaining the operation of the main part in the first embodiment.
  • FIG. 11 shows the relationship between the rotation speed of the motor 70 shown in FIG. 4 and the efficiency of the motor 70. As described above, in the region where the rotation speed is less than X, the connection state of the windings of the motor 70 is switched to the star connection. At this time, in the first embodiment, only the above-mentioned rectification control is performed.
  • the connection state of the winding of the motor 70 is switched to the delta connection.
  • the boost rectification control described above is performed.
  • step S101 it is determined whether or not the connection state of the winding is a star connection.
  • step S102 rectification control is performed.
  • the converter 30 performs a rectification operation of converting an AC voltage into a DC voltage. After that, the process from step S101 is repeated.
  • connection state of the windings of the motor 70 becomes a star connection in a low speed region where the rotation speed is less than X.
  • the motor 70 can be sufficiently operated without performing boost control.
  • the energy loss due to the boost control is larger than the power factor improvement of the rectifier circuit 22 due to the boost control. Therefore, by limiting the operation of the converter 30 to only the rectification operation, the loss in the low speed region is suppressed. This makes it possible to improve efficiency in the low speed region.
  • step S101 when the connection state of the winding of the motor 70 is not the star connection (step S101, No), the connection state of the winding is the delta connection, so the step-up rectification control is performed (step S103).
  • the converter 30 performs a rectification operation for converting an AC voltage into a DC voltage and a step-up operation for boosting the DC voltage rectified by the rectification operation. After that, the process from step S101 is repeated.
  • connection state of the windings of the motor 70 is delta connection in the high-speed region where the rotation speed exceeds X.
  • the counter electromotive force generated in the winding of the motor 70 becomes large, and the motor 70 may step out only by the rectification control. Therefore, step-up rectification control accompanied by step-up operation is performed. If the step-up rectification control is performed, it is possible to obtain the effect of improving the loss by the synchronous rectification while preventing the motor 70 from stepping out.
  • the converter converts the AC voltage output from the AC power supply into a DC voltage, which is required. If so, the DC voltage will be boosted.
  • the control unit that controls the operation of the converter and the switching of the connection state of the winding switches whether or not the boosting operation is performed in the converter according to the connection state of the winding.
  • AC / DC conversion control is performed according to the connection state of the windings, so that it is possible to further improve the efficiency of the product equipped with the winding switching motor.
  • FIG. 13 is a block diagram showing an example of a hardware configuration that realizes the function of the control unit 80 according to the first embodiment.
  • FIG. 14 is a block diagram showing another example of the hardware configuration that realizes the function of the control unit 80 according to the first embodiment.
  • the processor 300 that performs the calculation
  • the memory 302 that stores the program read by the processor 300
  • the interface 304 for inputting / outputting signals can be included.
  • the processor 300 may be a computing means such as an arithmetic unit, a microprocessor, a microcomputer, a CPU (Central Processing Unit), or a DSP (Digital Signal Processor).
  • the memory 302 includes a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Program ROM), and an EEPROM (registered trademark) (Electrically EPROM). Examples thereof include magnetic disks, flexible disks, optical disks, compact disks, mini disks, and DVDs (Digital entirely Disc).
  • the memory 302 stores a program that executes the function of the control unit 80 according to the first embodiment.
  • the processor 300 sends and receives necessary information via the interface 304, the processor 300 executes a program stored in the memory 302, and the processor 300 refers to a table stored in the memory 302 to perform the above-described processing. It can be carried out.
  • the calculation result by the processor 300 can be stored in the memory 302.
  • the processing circuit 305 shown in FIG. 14 can also be used.
  • the processing circuit 305 corresponds to a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.
  • the information input to the processing circuit 305 and the information output from the processing circuit 305 can be obtained via the interface 304.
  • control unit 80 may be performed in the processing circuit 305, and processing not performed in the processing circuit 305 may be performed in the processor 300 and the memory 302.
  • FIG. 15 is a diagram showing a configuration example of the air conditioner 200 according to the second embodiment.
  • the air conditioner 200 according to the second embodiment includes the motor drive device 100 described in the first embodiment.
  • the compressor 251 incorporating the electric motor 70 in the first embodiment, the four-way valve 259, the outdoor heat exchanger 252, the expansion valve 261 and the indoor heat exchanger 257 are connected via a refrigerant pipe 262. It is equipped with a refrigeration cycle installed in the air conditioner to form a separate air conditioner.
  • the components having the same functions as those in the first embodiment are designated by the same reference numerals as those in the first embodiment.
  • a refrigeration cycle is configured in which the refrigerant circulates between the compressor 251 and the outdoor heat exchanger 252 and between the compressor 251 and the indoor heat exchanger 257 to perform air conditioning and heating.
  • the configuration shown in FIG. 15 can be applied not only to an air conditioner but also to a refrigerating cycle apparatus including a refrigerating cycle such as a refrigerator and a freezer.
  • the air conditioner 200 according to the second embodiment is equipped with the motor drive device 100 according to the first embodiment, the effects obtained in the first embodiment can be enjoyed.
  • the configuration shown in the above embodiment is an example, and can be combined with another known technique, and a part of the configuration is omitted or changed without departing from the gist. It is also possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

L'invention concerne un dispositif d'entraînement de moteur électrique (100) pour entraîner un moteur électrique (70), qui est un moteur électrique à commutation d'enroulement, ledit dispositif d'entraînement de moteur électrique comprenant : un convertisseur (30) pour convertir une tension alternative délivrée en sortie par une alimentation en courant alternatif (10) en tension continue et pour amplifier la tension continue si nécessaire ; un condensateur de lissage (40) pour lisser la tension continue délivrée en sortie par le convertisseur (30) ; un onduleur (50) pour convertir la tension continue lissée par le condensateur de lissage (40) en une tension d'entraînement pour le moteur électrique (70) et pour appliquer la tension d'entraînement au moteur électrique (70) ; et une unité de commande (80) pour commander les opérations du convertisseur (30) et de l'onduleur (50), et la commutation des états de connexion de l'enroulement. L'unité de commande (80) commute la présence/l'absence de l'opération d'amplification de tension du convertisseur (30) en fonction de l'état de connexion de l'enroulement.
PCT/JP2020/008339 2020-02-28 2020-02-28 Dispositif d'entraînement de moteur électrique et climatiseur WO2021171562A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018007327A (ja) * 2016-06-28 2018-01-11 日立ジョンソンコントロールズ空調株式会社 直流電源装置および空気調和機
WO2018078839A1 (fr) * 2016-10-31 2018-05-03 三菱電機株式会社 Dispositif d'entraînement de moteur électrique et climatiseur
WO2018078849A1 (fr) * 2016-10-31 2018-05-03 三菱電機株式会社 Dispositif d'entraînement de moteur électrique et climatiseur
WO2019021452A1 (fr) * 2017-07-28 2019-01-31 三菱電機株式会社 Dispositif d'entraînement, compresseur, climatiseur et procédé de commande d'un moteur électrique de type à aimant permanent intégré

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WO2018078839A1 (fr) * 2016-10-31 2018-05-03 三菱電機株式会社 Dispositif d'entraînement de moteur électrique et climatiseur
WO2018078849A1 (fr) * 2016-10-31 2018-05-03 三菱電機株式会社 Dispositif d'entraînement de moteur électrique et climatiseur
WO2019021452A1 (fr) * 2017-07-28 2019-01-31 三菱電機株式会社 Dispositif d'entraînement, compresseur, climatiseur et procédé de commande d'un moteur électrique de type à aimant permanent intégré

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