WO2018020657A1 - Dispositif convertisseur de puissance et climatiseur - Google Patents

Dispositif convertisseur de puissance et climatiseur Download PDF

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Publication number
WO2018020657A1
WO2018020657A1 PCT/JP2016/072311 JP2016072311W WO2018020657A1 WO 2018020657 A1 WO2018020657 A1 WO 2018020657A1 JP 2016072311 W JP2016072311 W JP 2016072311W WO 2018020657 A1 WO2018020657 A1 WO 2018020657A1
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Prior art keywords
power
power conversion
charging
conversion circuit
discharging unit
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PCT/JP2016/072311
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English (en)
Japanese (ja)
Inventor
憲嗣 岩崎
成雄 梅原
有澤　浩一
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018530298A priority Critical patent/JPWO2018020657A1/ja
Priority to PCT/JP2016/072311 priority patent/WO2018020657A1/fr
Publication of WO2018020657A1 publication Critical patent/WO2018020657A1/fr

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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
    • 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 invention relates to a power conversion device including a plurality of power conversion circuits that convert power output to a load such as a motor, and an air conditioner including the power conversion device.
  • Patent Document 1 discloses an apparatus in which a first inverter is electrically connected to a first winding of a double three-phase motor, and a second inverter is electrically connected to a second winding.
  • Patent Document 1 discloses a structure in which a first capacitor is connected to the first inverter as a smoothing capacitor, and a second capacitor is connected to the second inverter as a smoothing capacitor.
  • Patent Document 2 discloses a structure in which the smoothing capacitor connected to the subsequent stage of the diode bridge of the inverter is a film capacitor.
  • the power conversion device can reduce the size and cost of the device in addition to ensuring reliability.
  • the film capacitor has a smaller capacity than the electrolytic capacitor.
  • the input voltage of the power conversion device is abruptly reduced each time an instantaneous voltage drop occurs in the power supply.
  • the driving of the motor is stopped each time an instantaneous voltage drop occurs in the power supply.
  • the operation of the air conditioner stops and causes discomfort to the user whenever an instantaneous voltage drop occurs in the power supply. become.
  • the present invention is an invention for solving the above-described problems, and maintains an input voltage even when an instantaneous voltage drop occurs in a power supply while reducing the size and cost of the apparatus.
  • An object of the present invention is to provide a power conversion device capable of performing the above and an air conditioner including the power conversion device.
  • the power conversion device of the present invention is connected to a power source, converts the power of the power source into power to be output to the load, and is connected to the power source, and converts the power of the power source into power to be output to the load.
  • a capacitance of the second charging / discharging unit is smaller than a capacitance of the first charging / discharging unit.
  • the air conditioner of the present invention includes the above-described power converter, a motor driven by the power output from the power converter, and a compressor operated by the motor.
  • the power conversion device can reduce the size and cost of the device at the second charging / discharging unit, and can reduce the cost at the first charging / discharging unit even when an instantaneous voltage drop occurs at the power source.
  • the input voltage can be maintained.
  • FIG. 1 is a block diagram showing a configuration and an application example of the power conversion apparatus according to Embodiment 1 of the present invention.
  • the power conversion device shown in FIG. 1 converts the power supplied from the power supply 130 to generate driving power for the motor 7.
  • a first power conversion circuit 3 connected to the power source 130, the first winding 5 of the double three-phase motor 7, and a second power conversion circuit 4 connected to the second winding 6 of the double three-phase motor 7.
  • the power conversion device includes a first charging / discharging unit 1 connected to the input side of the first power conversion circuit 3 and a second charging / discharging unit 2 connected to the input side of the second power conversion circuit 4. ing.
  • the first power conversion circuit 3 and the second power conversion circuit 4 are connected to a common power supply 130 in parallel. Note that the first power conversion circuit 3 and the second power conversion circuit 4 may be connected to separate power supplies 130, respectively.
  • the first power conversion circuit 3 and the second power conversion circuit 4 are configured by, for example, inverter circuits, and two upper and lower switching elements (for example, IGBT (insulated gate bipolar) corresponding to each of the U phase, the V phase, and the W phase. Transistor).
  • the first power conversion circuit 3 and the second power conversion circuit 4 are not limited to a three-phase inverter circuit, and may be a two-phase inverter circuit as long as it is connected to a two-phase motor.
  • the 1st charging / discharging part 1 (1st charging / discharging part) and the 2nd charging / discharging part 2 (2nd charging / discharging part) have 1 each of charging / discharging components, and the 2nd charging / discharging part 2 is Compared with the 1st charging / discharging part 1, an electrostatic capacitance is small. That is, for example, a large-capacity electrolytic capacitor is used for the first charging / discharging unit 1, and a small-capacity film capacitor is used for the second charging / discharging unit 2, for example.
  • the electrolytic capacitor and the film capacitor are used for charging / discharging components, other components which can be charged / discharged, for example, an electric double layer capacitor, etc. may be used.
  • the power conversion device further includes a control unit 12 that controls each of the first power conversion circuit 3 and the second power conversion circuit 4.
  • the control unit 12 controls the first power conversion circuit 3 based on the detection results of the first current sensor 8 and the second current sensor 9 that detect the output current of the first power conversion circuit 3.
  • the second power conversion circuit 4 is controlled based on the detection results of the third current sensor 10 and the fourth current sensor 11 that detect the output current.
  • the present invention may be applied to a power conversion device in which the number of electrically independent windings and the number of power conversion circuits are n (where is a natural number of 2 or more). Further, when the number of power conversion circuits is n, the number of charge / discharge units is also n.
  • the respective capacitances from the (m + 1) th charging / discharging unit (m ⁇ n, m are natural numbers) to the nth charging / discharging unit are changed from the first charging / discharging unit to the mth charging / discharging unit. It is smaller than each electrostatic capacity to the discharge part.
  • a first power conversion circuit 3 and a second power conversion circuit 4 are respectively provided in a motor 7 having electrically independent windings (first winding 5 and second winding 6).
  • the first charging / discharging unit 1 is connected to the input unit of the first power conversion circuit 3, and the second charging / discharging unit 2 is connected to the input unit of the second power conversion circuit 4.
  • FIG. 2 is a circuit diagram showing an example of a charge / discharge unit of the power conversion device according to Embodiment 1 of the present invention.
  • the 1st charging / discharging part 1 shown in FIG. 2 has several charging / discharging components connected in series or in parallel.
  • the first charging / discharging unit 1 includes a first electrolytic capacitor 1a and a second electrolytic capacitor 1b connected in series, a third electrolytic capacitor 1c and a fourth electrolytic capacitor 1d connected in series, The electrolytic capacitor 1a and the third electrolytic capacitor 1c are connected in parallel, and the second electrolytic capacitor 1b and the fourth electrolytic capacitor 1d are connected in parallel. Furthermore, in the 1st charging / discharging part 1, the 1st balance resistor 1e and the 2nd balance resistor 1f which are accompanying passive elements are connected in parallel with the 1st electrolytic capacitor 1a and the 2nd electrolytic capacitor 1b.
  • the withstand voltage of the first charging / discharging unit 1 can be increased. That is, by combining a plurality of low breakdown voltage capacitors, it is possible to increase the breakdown voltage of the entire charging / discharging unit, eliminating the need for expensive high breakdown voltage capacitors, and reducing costs. Specifically, when a power converter having a withstand voltage of 200V is changed to a power converter having a withstand voltage of 400V, the charge / discharge part (capacitor) having a withstand voltage of 200V is changed to a charge / discharge part (capacitor) having a withstand voltage of 400V. Instead, as shown in FIG.
  • a plurality of charge / discharge portions (capacitors) having a withstand voltage of 200 V are combined.
  • the number of parts to use increases, cost can be reduced by using parts with a low unit price and sharing parts with a plurality of devices.
  • the 1st charging / discharging part 1 was demonstrated in FIG. 2, you may apply the structure shown in FIG.
  • FIG. 2 demonstrated the structure which combined the some electrolytic capacitor, you may comprise combining other charge / discharge components, such as a film capacitor.
  • FIG. 3 is a timing chart showing an operation when an instantaneous voltage drop occurs in power supply 130 in the power conversion apparatus according to Embodiment 1 of the present invention.
  • the second power conversion circuit 4 has an input voltage due to the instantaneous voltage drop because the capacitance of the second charging / discharging unit 2 is small. The change is stopped without being covered, and the torque generated becomes 0 (zero) as shown in FIG.
  • the first power conversion circuit 3 since the first power conversion circuit 3 has a large capacitance of the first charging / discharging unit 1, the change in the input voltage is covered by the instantaneous voltage drop and the generated torque is maintained. Further, the first power conversion circuit 3 performs control to maintain the rotation speed of the motor 7 even when the second power conversion circuit 4 is stopped, and thus the torque generated temporarily increases.
  • the controller 12 reduces the rotational speed of the motor 7, the torque generated by the first power conversion circuit 3 is returned to the original torque.
  • the rotation speed of the motor 7 starts to decrease from when the instantaneous voltage drop occurs at the power source 130 and decreases to a certain power failure protection rotation speed.
  • the rotation speed of the motor 7 maintains the power failure protection rotation speed, and returns to the normal rotation speed when the instantaneous voltage drop is resolved. That is, the control unit 12 resumes the operation of the second power conversion circuit 4 when the instantaneous voltage drop is resolved.
  • FIG. 4 is a flowchart showing the operation of the power conversion apparatus according to Embodiment 1 of the present invention.
  • step S101 When the output command value is smaller than the output power capacity of the second power conversion circuit 4 (step S101: YES), the control unit 12 activates only the second power conversion circuit 4 with the first power conversion circuit 3 stopped. (Step S101a). The control part 12 returns a process to step S101 after step S101a, and judges whether there is any change in an output command value. When the output command value is greater than or equal to the output power capacity of the second power conversion circuit 4 (step S101: NO), the control unit 12 activates the first power conversion circuit 3 and the second power conversion circuit 4 (step S102).
  • control unit 12 detects whether or not an instantaneous voltage drop has occurred in the power supply 130 (step S103). Specifically, the control unit 12 monitors whether or not an instantaneous voltage drop has occurred in the power supply 130 by monitoring the voltages of the first charging / discharging unit 1 and the second charging / discharging unit 2 as shown in FIG. Detected. The control unit 12 may directly detect the voltage of the power supply 130 instead of monitoring the voltages of the first charging / discharging unit 1 and the second charging / discharging unit 2.
  • step S103: NO When the controller 12 does not detect that an instantaneous voltage drop has occurred in the power supply 130 (step S103: NO), the control unit 12 returns the process to step S103 and monitors the occurrence of the instantaneous voltage drop in the power supply 130.
  • step S103: YES when the controller 12 detects that an instantaneous voltage drop has occurred in the power supply 130 (step S103: YES), the controller 12 stops the operation of the second power conversion circuit 4 (step S103a). And the control part 12 starts the protection driving mode which reduces the rotation speed of the motor 7 to a power failure protection rotation speed, as demonstrated in FIG. 3 (step S103b).
  • control unit 12 detects whether or not the instantaneous voltage drop generated by the power supply 130 has been recovered (step S104). Specifically, as shown in FIG. 1, the control unit 12 monitors the voltages of the first charging / discharging unit 1 and the second charging / discharging unit 2 to determine whether or not the instantaneous voltage drop generated in the power supply 130 has been recovered. Is detected.
  • Control part 12 starts the 2nd power converter circuit 4 (Step S103c), when detecting having returned from a momentary voltage drop which occurred with power supply 130 (Step S104: YES). And the control part 12 complete
  • the control unit 12 determines whether the operation time in the protection operation mode has exceeded the protection operation possible time. (Step S105). Specifically, the control unit 12 activates a timer that measures the protected operation time during the process in step S103b, and determines whether the time measured by the timer has exceeded the protected operation possible time.
  • step S105: NO When the operation time in the protection operation mode does not exceed the protection operation possible time (step S105: NO), the control unit 12 returns the process to step S104 and monitors the operation time in the protection operation mode. On the other hand, when the operation time in the protection operation mode exceeds the protection operation possible time (step S105: YES), the control unit 12 stops the operation of the first power conversion circuit 3 (step S106). And the control part 12 notifies that the power failure abnormality generate
  • the power conversion device includes the first charging / discharging unit 1 connected to the first power conversion circuit 3 and the second charging / discharging unit 2 connected to the second power conversion circuit 4. And.
  • the first power conversion circuit 3 and the second power conversion circuit 4 are connected to the power source 130 and convert the power of the power source 130 into power output to the motor 7 (load).
  • First charging / discharging unit 1 and second charging / discharging unit 2 are connected to each of first power conversion circuit 3 and second power conversion circuit 4 and are charged by power supply 130.
  • the capacitance of the second charging / discharging unit 2 is smaller than the capacitance of the first charging / discharging unit 1.
  • the power conversion device has the first charge / discharge even when an instantaneous voltage drop occurs in the power supply 130 while the second charge / discharge unit 2 reduces the size and cost of the device.
  • the input voltage which can continue rotation of the motor 7 in the part 1 can be maintained.
  • the 1st charging / discharging part 1 the 2nd charging / discharging part 2, and the case where there were two charging / discharging parts were demonstrated
  • the 1st charging / discharging part to nth charging / discharging. You may generalize to n charge / discharge parts up to the part.
  • the power conversion device includes n charging / discharging units, a power conversion circuit is connected to each charging / discharging unit, and thus n power conversion circuits are required.
  • each capacitance from the (m + 1) th charging / discharging unit to the nth charging / discharging unit is smaller than each capacitance from the first charging / discharging unit to the mth charging / discharging unit.
  • the power conversion device further includes a control unit that controls each of the first power conversion circuit 3 and the second power conversion circuit 4. Therefore, the power conversion device can start and stop the necessary power conversion circuit according to the output voltage required for the load.
  • the power converter according to the present embodiment has been described that the load that outputs the power converted by the first power converter circuit 3 and the second power converter circuit 4 is the motor 7, it is not limited thereto. The same effect can be obtained even with a load other than the motor.
  • the control unit 12 stops the first power conversion circuit 3 when the necessary power of the motor 7 is smaller than the output power of the second power conversion circuit 4. Energy consumption can be reduced.
  • the control unit 12 determines that the required power of the motor 7 is from the (m + 1) th power conversion circuit to the nth power conversion circuit. When it is smaller than the total output power up to the power conversion circuit, the first power conversion circuit 3 to the m-th power conversion circuit are stopped.
  • the control unit 12 causes the voltage of the second charging / discharging unit 2 to be a constant value when the voltage of the power supply 130 is reduced to a certain value or less (for example, an instantaneous voltage drop).
  • the second power conversion circuit 4 is stopped while the first power conversion circuit 3 is operated, so that the rotation speed of the motor 7 can be maintained at the power failure protection rotation speed.
  • the control unit 12 reduces the voltage of the power supply 130 to a predetermined value or less, so that (m + 1) th
  • the (m + 1) th power conversion circuit to the nth power conversion circuit are stopped, while the first power conversion circuit 3 to the mth power Operate up to the conversion circuit.
  • the motor 7 has the first winding 5 and the second winding 6 that are electrically independent, and the first power conversion circuit 3 and the second power conversion circuit 4. However, since it is connected to each of the first winding 5 and the second winding 6, the motor 7 can be driven even if one of the power conversion circuits is stopped.
  • FIG. 5 is a block diagram showing a configuration and an application example of the power conversion apparatus according to Embodiment 2 of the present invention.
  • the same components as those described in the power conversion device according to Embodiment 1 of the present invention are denoted by the same reference numerals and detailed description thereof is omitted.
  • the first charging / discharging unit 1 is connected to the single-phase AC power source 13 via the rectifier circuit 14, and the second charging / discharging unit 2 is connected to the AC power source 13 via the rectifier circuit 15. It is connected.
  • the rectifier circuits 14 and 15 are, for example, full-wave rectifier circuits configured by diode bridges for full-wave rectification of the AC input voltage supplied from the AC power supply 13.
  • the inputs of the rectifier circuits 14 and 15 are connected to one AC power source 13, but different AC power sources may be connected to each other.
  • FIG. 6 is a block diagram showing another configuration of the power conversion apparatus according to Embodiment 2 of the present invention.
  • the same components as those described in the power conversion device according to Embodiment 1 of the present invention and the power conversion device shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • an open / close circuit is provided between the second power conversion circuit 4 and the second charging / discharging unit 2.
  • the open / close circuit is a switch circuit 16 provided on the wiring connected to the cathode side of the diode constituting the rectifier circuit 15.
  • the switch circuit 16 causes the regenerative current from the motor 7 that is a load to flow toward the second charge / discharge unit 2. Can be blocked. Therefore, in the power conversion device shown in FIG. 6, when the instantaneous voltage drop occurs in the AC power supply 13 and the second power conversion circuit 4 is stopped, the regenerative current from the motor 7 is cut off by the switch circuit 16. It is possible to prevent the voltage of the second charging / discharging unit 2 from rising and being destroyed beyond the breakdown voltage. That is, the switch circuit 16 prevents the regenerative current from flowing and protects the second charging / discharging unit 2.
  • FIG. 7 is a flowchart showing the operation of the power conversion device of another configuration according to Embodiment 2 of the present invention.
  • the same processes as those in the flowchart showing the operation of the power conversion device according to Embodiment 1 of the present invention shown in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the control unit 12 determines whether or not the output command value of the input power is smaller than the output power capacity of the second power conversion circuit 4 (step S101).
  • step S101: YES When the output command value is smaller than the output power capacity of the second power conversion circuit 4 (step S101: YES), the control unit 12 activates only the second power conversion circuit 4 with the first power conversion circuit 3 stopped. (Step S101a). When the output command value is greater than or equal to the output power capacity of the second power conversion circuit 4 (step S101: NO), the control unit 12 activates the first power conversion circuit 3 and the second power conversion circuit 4 (step S102).
  • the control unit 12 detects whether or not an instantaneous voltage drop has occurred in the AC power supply 13 (step S103).
  • step S103: NO the control unit 12 returns the process to step S103 and monitors the occurrence of the instantaneous voltage drop in the AC power supply 13.
  • step S103: YES the controller 12 stops the operation of the second power conversion circuit 4 (step S103a).
  • the control unit 12 opens the switch circuit 16 in order to cut off the regenerative current to the second charging / discharging unit 2 (step S103e). And the control part 12 starts the protection driving mode which reduces the rotation speed of the motor 7 to a power failure protection rotation speed (step S103b).
  • control unit 12 detects whether or not the instantaneous voltage drop generated by the AC power supply 13 has been recovered (step S104).
  • the control unit 12 closes (short-circuits) the switch circuit 16 to supply power to the second power conversion circuit 4. (Step S103f).
  • the control part 12 starts the 2nd power converter circuit 4 (step S103c).
  • step S104 NO
  • step S105 it is determined whether or not the operation time in the protection operation mode exceeds the protection operation possible time. Judgment is made (step S105).
  • step S105: NO When the operation time in the protection operation mode does not exceed the protection operation possible time (step S105: NO), the control unit 12 returns the process to step S104 and monitors the operation time in the protection operation mode. On the other hand, when the operation time in the protection operation mode exceeds the protection operation possible time (step S105: YES), the control unit 12 stops the operation of the first power conversion circuit 3 (step S106). And the control part 12 notifies that the power failure abnormality generate
  • the switch circuit 16 is further provided on the output side of the second charge / discharge unit 2.
  • a regenerative current can be interrupted
  • the control part 12 when generalizing into n charging / discharging parts from the 1st charging / discharging part 1 to the nth charging / discharging part, the control part 12 will each charge from the (m + 1) th charging / discharging part to the nth charging / discharging part.
  • An opening / closing circuit is further provided on the output side of the discharge unit.
  • the switch circuit 16 is opened when the second power conversion circuit 4 is stopped, so that an instantaneous voltage drop occurs in the AC power supply 13.
  • the switch circuit 16 stops when the (m + 1) th power conversion circuit to the nth power conversion circuit are stopped. ,Open.
  • the switch circuit 16 is closed when the second power conversion circuit 4 is operated, so that an instantaneous voltage drop occurs in the AC power supply 13.
  • the second power conversion circuit 4 can be operated by the AC power supply 13 except when the second power conversion circuit 4 is stopped. Note that when generalized to n power conversion circuits from the first power conversion circuit 3 to the nth power conversion circuit, the switching circuit is used when operating from the (m + 1) th power conversion circuit to the nth power conversion circuit. ,close.
  • FIG. 8 is a block diagram showing a configuration and an application example of the power conversion apparatus according to Embodiment 3 of the present invention.
  • FIG. 8 about the same structure as the structure demonstrated with the power converter device which concerns on Embodiment 1, 2, the same code
  • the rectifier circuit 14 connected to the input side of the first charging / discharging unit 1 and the second charging / discharging unit 2 is common.
  • the first power conversion circuit 3 and the second power conversion circuit 4 are connected to the first charging / discharging unit 1 and the second charging / discharging unit 2 connected to the common rectifier circuit 14. Then, electric power is supplied to the motor 7.
  • the power conversion device according to Embodiment 3 of the present invention further includes the reactor 17 on the input side of the first charging / discharging unit 1, the first charging / discharging unit 1 absorbs the regenerative current.
  • the second charging / discharging unit 2 can be protected.
  • the first charging / discharging unit 1 can be charged using the regenerative current, and the power can be used effectively.
  • At least one charging / discharging part of the 1st charging / discharging part 1 to the mth charging / discharging part A reactor is further provided on the input side.
  • FIG. 9 is a block diagram showing a configuration and an application example of the power conversion device according to Embodiment 4 of the present invention.
  • the same components as those described in the power conversion devices according to Embodiments 1 to 3 of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the first power conversion circuit 3 is connected to the motor 18, and the second power conversion circuit 4 is connected to the motor 19 independent of the motor 18.
  • the power converter device shown in FIG. 9 can drive a plurality of independent motors (loads) by one power converter device.
  • an independent motor is connected to each of the n power conversion circuits.
  • the n power conversion circuits may be divided into a plurality of groups, and independent motors may be connected to each group.
  • the motor 18 is connected to the first group from the first power conversion circuit 3 to the mth power conversion circuit
  • the motor 19 is connected to the second group from the (m + 1) th power conversion circuit to the nth power conversion circuit. May be.
  • FIG. 10 is a block diagram showing a configuration and an application example of the power conversion apparatus according to Embodiment 5 of the present invention.
  • the same components as those described in the power converters according to Embodiments 1 to 4 of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the power source connected to the rectifier circuit 14 common to the first charging / discharging unit 1 and the second charging / discharging unit 2 is the three-phase AC power source 13a.
  • the power of the three-phase AC power supply 13 a is converted by the first power conversion circuit 3 and the second power conversion circuit 4 and supplied to the motor 7.
  • various types of power supplies can be used in the power conversion device shown in FIG.
  • FIG. 11 is a block diagram which shows the structure and application example of the power converter device which concerns on Embodiment 6 of this invention.
  • the same components as those described in the power converters according to Embodiments 1 to 5 of the present invention are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the load connected to the first power conversion circuit 3 and the second power conversion circuit 4 is the double two-phase motor 7a.
  • the double two-phase motor 7a includes a first winding 5a and a second winding 6a that are electrically independent, and the first winding 5a is connected to the first power conversion circuit 3 and the second winding. 6a is connected to the second power conversion circuit 4, respectively.
  • the power conversion device shown in FIG. 11 can supply power to various types of loads.
  • the single phase alternating current power supply 13 is used, you may use a three phase alternating current power supply.
  • FIG. 12 is a schematic diagram showing an air-conditioning apparatus 100 according to Embodiment 7 of the present invention.
  • the air conditioner 100 includes a compressor 1A, a four-way valve 2A, an outdoor heat exchanger 3A, an expansion valve 4A, and an indoor heat exchanger 5A.
  • the refrigerant circuit 90A is configured by connecting the compressor 1A, the four-way valve 2A, the outdoor heat exchanger 3A, the expansion valve 4A, and the indoor heat exchanger 5A in order by piping. .
  • Compressor 1A is a variable capacity compressor that can discharge high-temperature and high-pressure refrigerant by compressing sucked refrigerant.
  • the compressor 1A is operated by a motor (not shown), and the motor is connected to the power converter according to Embodiments 1 to 6 of the present invention (not shown), and is supplied from the power converter. Driven by electric power.
  • the four-way valve 2A is a switching unit that can switch the flow direction of the refrigerant discharged from the compressor 1A according to the operation.
  • the outdoor heat exchanger 3A is a heat exchanger that functions as a condenser when performing a cooling operation and functions as an evaporator when performing a heating operation.
  • the outdoor fan 31A is a blower that supplies outside air to the outdoor heat exchanger 3A and forms an air flow.
  • the expansion valve 4A decompresses and expands the refrigerant flowing out of the outdoor heat exchanger 3A when performing the cooling operation, and decompresses and expands the refrigerant flowing out of the indoor heat exchanger 5A when performing the heating operation.
  • the indoor heat exchanger 5A is a heat exchanger that functions as an evaporator when performing a cooling operation and functions as a condenser when performing a heating operation.
  • the indoor fan 51A is a blower that supplies outside air to the indoor heat exchanger 5A and forms an air flow.
  • the outdoor refrigerant temperature sensor 32A is a temperature detection unit that detects the temperature of the refrigerant flowing through the outdoor heat exchanger 3A.
  • the indoor side refrigerant temperature sensor 52A is a sensor that detects the temperature of the refrigerant flowing through the indoor heat exchanger 5A.
  • the outdoor temperature sensor 33A is a temperature detection unit that detects the outdoor temperature around the outdoor heat exchanger 3A.
  • the controller 80A controls the four-way valve 2A to switch the direction in which the refrigerant discharged from the compressor 1A flows.
  • the air-conditioning apparatus 100 includes the power converter according to Embodiments 1 to 6 of the present invention, the motor driven by the electric power output from the power converter, And a compressor operated by a motor.
  • the second charging / discharging unit 2 can reduce the size and cost of the power converter, and the power converter can perform the first charging / discharging even when an instantaneous voltage drop occurs in the power source. Since the input voltage which can continue rotation of a motor in the part 1 is maintained, a driving

Abstract

L'invention concerne un dispositif convertisseur de puissance qui inclut un premier circuit convertisseur de puissance (3), un deuxième circuit convertisseur de puissance (4), une première unité de charge/décharge (1), et une deuxième unité de charge/décharge (2). Le premier circuit convertisseur de puissance (3) et le deuxième circuit convertisseur de puissance (4) convertissent la puissance d'une alimentation électrique (130) en puissance à transmettre à une charge. La première unité de charge/décharge (1) et la deuxième unité de charge/décharge (2) sont connectées au premier circuit convertisseur de puissance (3) et au deuxième circuit convertisseur de puissance (4) respectivement et chargées par l'alimentation électrique (130). La deuxième unité de charge/décharge (2) présente une capacité inférieure à la capacité de la première unité de charge/décharge (1).
PCT/JP2016/072311 2016-07-29 2016-07-29 Dispositif convertisseur de puissance et climatiseur WO2018020657A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018530298A JPWO2018020657A1 (ja) 2016-07-29 2016-07-29 電力変換装置および空気調和装置
PCT/JP2016/072311 WO2018020657A1 (fr) 2016-07-29 2016-07-29 Dispositif convertisseur de puissance et climatiseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/072311 WO2018020657A1 (fr) 2016-07-29 2016-07-29 Dispositif convertisseur de puissance et climatiseur

Publications (1)

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WO2018020657A1 true WO2018020657A1 (fr) 2018-02-01

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007108185A1 (fr) * 2006-03-15 2007-09-27 Mitsubishi Electric Corporation Dispositif d'attaque de moteur et dispositif d'attaque de compresseur
JP2011167035A (ja) * 2010-02-15 2011-08-25 Denso Corp 回転電機制御装置、および、これを用いた電動パワーステアリング装置
JP2016131444A (ja) * 2015-01-14 2016-07-21 株式会社日立製作所 永久磁石同期モータ、巻線切替モータ駆動装置、及び、それらを用いた冷凍空調機器、電動車両

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11252986A (ja) * 1998-02-27 1999-09-17 Sanyo Denki Co Ltd 多重巻き電動機の制御装置
JP2012135157A (ja) * 2010-12-22 2012-07-12 Daikin Ind Ltd モータ駆動システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007108185A1 (fr) * 2006-03-15 2007-09-27 Mitsubishi Electric Corporation Dispositif d'attaque de moteur et dispositif d'attaque de compresseur
JP2011167035A (ja) * 2010-02-15 2011-08-25 Denso Corp 回転電機制御装置、および、これを用いた電動パワーステアリング装置
JP2016131444A (ja) * 2015-01-14 2016-07-21 株式会社日立製作所 永久磁石同期モータ、巻線切替モータ駆動装置、及び、それらを用いた冷凍空調機器、電動車両

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