WO2020208825A1 - Dispositif de conversion de puissance et climatiseur - Google Patents

Dispositif de conversion de puissance et climatiseur Download PDF

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Publication number
WO2020208825A1
WO2020208825A1 PCT/JP2019/016035 JP2019016035W WO2020208825A1 WO 2020208825 A1 WO2020208825 A1 WO 2020208825A1 JP 2019016035 W JP2019016035 W JP 2019016035W WO 2020208825 A1 WO2020208825 A1 WO 2020208825A1
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WO
WIPO (PCT)
Prior art keywords
wiring
conversion device
power conversion
noise
converter
Prior art date
Application number
PCT/JP2019/016035
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English (en)
Japanese (ja)
Inventor
友仁 杉森
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.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/016035 priority Critical patent/WO2020208825A1/fr
Priority to JP2021513148A priority patent/JP7204894B2/ja
Publication of WO2020208825A1 publication Critical patent/WO2020208825A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Definitions

  • the present invention relates to a power converter and an air conditioner that perform power conversion.
  • a power conversion device having a common mode choke coil is known.
  • Noise caused by the switching operation of the inverter of the power converter is included in the common mode current that flows in common to the wiring pattern of the power converter due to the presence of floating capacitance between the wiring pattern of the power converter and the ground. There is. Such noise may be conducted to the other device when the power conversion device and the other device use a common power source.
  • the common mode choke coil removes common mode noise, which is conduction noise due to the common mode current.
  • Patent Document 1 discloses a power conversion device having a common mode choke coil, an AC side phase capacitor, and a DC side phase capacitor.
  • the AC side interphase capacitor removes common mode noise on the AC side of the converter of the power converter.
  • the DC side interphase capacitor removes common mode noise on the DC side of the converter.
  • the AC side-phase capacitor and the DC side-phase capacitor are connected to the ground by using a lead wire.
  • the lead wire is connected to a structure having the same potential as the ground, such as the housing of the power conversion device or the housing of the device on which the power conversion device is mounted.
  • the power conversion device removes the common mode noise from the wiring pattern of the power conversion device by transmitting the common mode noise from the AC side phase capacitor and the DC side phase capacitor to the ground via the lead wire.
  • the inductance component of the lead wire works effectively, and the AC side phase capacitor and the DC side phase capacitor The conduction of noise between them is prevented.
  • the number of lead wires increases as the number of AC side-phase capacitors and DC side-phase capacitors mounted on the power conversion device increases.
  • the number of lead wires increases, the number of parts required for manufacturing the power converter increases and the number of work steps for installing the lead wires increases, so that the manufacturing cost of the power converter increases.
  • many lead wires are routed, which complicates the mode in which noise is transmitted. Therefore, when trying to reduce noise in the device, it becomes difficult to identify the noise source and the noise transmission path.
  • the AC side phase capacitor and the DC side phase capacitor are connected. Since there is no appropriate impedance in the damaged part, the noise on the AC side and the noise on the DC side interfere with each other in the wiring pattern. In the power conversion device, the noise on the AC side and the noise on the DC side interfere with each other, so that the noise is further increased. As described above, the conventional power conversion device has a problem that it is difficult to reduce noise with a small number of ground wires.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a power conversion device capable of reducing noise with a small number of ground wires.
  • the power conversion device is connected between the converter and the inverter connected between the AC power supply and the load, and between the AC power supply and the converter.
  • a common ground wire is used for grounding each of the AC side phase capacitor and the DC side phase capacitor.
  • An electronic component having an inductance component is provided in each of the wiring between the AC side phase capacitor and the ground wire and the wiring between the DC side phase capacitor and the ground wire.
  • the power conversion device according to the present invention has an effect that noise can be reduced with a small number of ground wires.
  • FIG. 1 is a diagram showing a configuration example of a power conversion device according to a first embodiment of the present invention.
  • the power conversion device 100 includes a converter 4 and an inverter 5 connected between the commercial AC power supply 1 and the load 20.
  • An example of the load 20 is a motor for driving a compressor provided in an outdoor unit of an air conditioner. Electric power is supplied to the motor by the electric power converter 100 mounted on the outdoor unit.
  • the commercial AC power supply 1 outputs a single-phase AC voltage to the power converter 100.
  • the converter 4 converts an AC voltage into a DC voltage by a rectifying action.
  • the inverter 5 converts the DC voltage output by the converter 4 into a three-phase AC voltage.
  • the power conversion device 100 applies the AC voltage output by the inverter 5 to the load 20.
  • Each of the input terminals of the converter 4 is connected to the commercial AC power supply 1 via a power supply line.
  • Each of the output terminals of the converter 4 is connected to the input terminal of the inverter 5 via a power supply line.
  • the power supply line connecting the commercial AC power supply 1 and the converter 4 may be referred to as an AC line
  • the power supply line between the converter 4 and the inverter 5 may be referred to as a DC line.
  • the power conversion device 100 has a smoothing capacitor 11 connected in parallel to the converter 4.
  • the smoothing capacitor 11 is connected between the DC lines on the inverter 5 side of the converter 4.
  • the smoothing capacitor 11 smoothes the DC voltage output by the converter 4.
  • a DC voltage smoothed by the smoothing capacitor 11 is applied to the inverter 5.
  • the power conversion device 100 includes a common mode choke coil 2 connected between the commercial AC power supply 1 and the converter 4, an X capacitor 6 which is an AC side line capacitor, and Y capacitors 7a and 7b which are AC side phase capacitors. It has 8a and 8b and Y capacitors 9a and 9b which are DC side phase capacitors.
  • the common mode choke coil 2, the X capacitor 6, and the Y capacitors 7a, 7b, 8a, and 8b function as a filter circuit for removing noise in the AC line.
  • the Y capacitors 9a and 9b function as a filter circuit for removing noise in the DC line.
  • the X capacitor 6 is connected between AC lines on the commercial AC power supply 1 side of the common mode choke coil 2.
  • the Y capacitor 7a and the Y capacitor 7b are connected between the AC lines on the common mode choke coil 2 side of the AC line from the position where the X capacitor 6 is connected.
  • the Y capacitor 7a and the Y capacitor 7b are connected in series with each other via the connection point 16.
  • the Y capacitor 8a and the Y capacitor 8b are connected between the AC lines on the converter 4 side of the common mode choke coil 2.
  • the Y capacitor 8a and the Y capacitor 8b are connected in series with each other via a connection point 17.
  • the Y capacitor 9a and the Y capacitor 9b are connected between the DC lines on the inverter 5 side of the DC line from the position where the smoothing capacitor 11 is connected.
  • the Y capacitor 9a and the Y capacitor 9b are connected in series with each other via a connection point 18.
  • the power conversion device 100 has an output terminal 22 for outputting a single-phase AC voltage.
  • Each of the output terminals 22 is located at the end of a branch line branched from the AC line connecting the commercial AC power supply 1 and the converter 4.
  • an indoor unit included in the air conditioner is connected to the output terminal 22.
  • the power conversion device 100 has a common mode choke coil 3 connected between the commercial AC power supply 1 and the output terminal 22, and Y capacitors 10a and 10b which are AC side phase capacitors.
  • the common mode choke coil 3 and the Y capacitors 10a and 10b function as a filter circuit for removing noise in the branch line.
  • the Y capacitor 10a and the Y capacitor 10b are connected between the branch lines on the output terminal 22 side of the common mode choke coil 3 among the branch lines.
  • the Y capacitor 10a and the Y capacitor 10b are connected in series with each other via a connection point 19.
  • the wiring drawn out from the connection point 16, the wiring drawn out from the connection point 17, the wiring drawn out from the connection point 18, and the wiring drawn out from the connection point 19 are one ground wire 21. It is connected to the. Each wiring is connected to the ground via the ground wire 21. As a result, a common ground wire 21 is used for grounding each of the Y capacitors 7a, 7b, 8a, 8b, 9a, 9b, 10a, and 10b.
  • the ground wire 21 is connected to the housing of the power conversion device 100 or the housing of the outdoor unit.
  • the power conversion device 100 collectively grounds the Y capacitors 7a, 7b, the Y capacitors 8a, 8b, the Y capacitors 9a, 9b, and the Y capacitors 10a, 10b by using the ground wire 21. To do.
  • the power conversion device 100 has ferrite beads 12, 13, 14, and 15 which are electronic components having an inductance component.
  • the ferrite beads 12 are provided in the wiring between the connection point 16 and the ground wire 21.
  • the ferrite beads 13 are provided in the wiring between the connection point 17 and the ground wire 21.
  • the ferrite beads 14 are provided in the wiring between the connection point 18 and the ground wire 21.
  • the ferrite beads 15 are provided in the wiring between the connection point 19 and the ground wire 21.
  • the ferrite beads 12, 13, 14 and 15 cause the energy of the current in the high frequency region to be lost due to the inductance component.
  • the ferrite beads 12, 13, 14, 15 absorb noise by losing the energy of the electric current.
  • ferrite beads 12 are provided in the wiring between the Y capacitors 7a and 7b and the ground wire 21.
  • Ferrite beads 13 are provided in the wiring between the Y capacitors 8a and 8b and the ground wire 21.
  • Ferrite beads 14 are provided in the wiring between the Y capacitors 9a and 9b and the ground wire 21.
  • Ferrite beads 15 are provided in the wiring between the Y capacitors 10a and 10b and the ground wire 21. That is, electronic components having an inductance component are provided in each of the wiring between the AC side phase capacitor and the ground wire 21 and the wiring between the DC side phase capacitor and the ground wire 21.
  • FIG. 2 is a diagram schematically showing an embodiment of mounting of an AC side-phase capacitor and a DC side-phase capacitor included in the power conversion device shown in FIG. 1.
  • the Y capacitors 7a, 7b, 8a, 8b, 9a, 9b, 10a, and 10b are mounted on the electronic circuit board 25.
  • the electronic circuit board 25 is a board on which the electronic circuit of the power conversion device 100 is mounted. The inside of the electronic circuit is filled with noise of various frequencies according to the operating state of the converter 4 and the inverter 5 shown in FIG.
  • the wiring 23 connects the input terminal of the electronic circuit board 25 to the commercial AC power supply 1.
  • the wiring 24 connects the output terminal of the electronic circuit board 25 and the load 20.
  • FIG. 2 shows a state in which the components provided on the electronic circuit board 25 are viewed from above the electronic circuit board 25. Note that, in FIG. 2, only the components necessary for explanation among the components mounted on the electronic circuit board 25 are shown, and the illustration of other components is omitted.
  • the Y capacitors 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b and the ground wire 21 are connected to each other via a wiring pattern on the electronic circuit board 25.
  • the power conversion device 100 can collectively ground each of the AC side-phase capacitor and the DC side-phase capacitor by using the common grounding wire 21.
  • the Y capacitors 7a, 7b, the Y capacitors 8a, 8b, the Y capacitors 9a, 9b, and the Y capacitors 10a, 10b If the configurations are grounded independently of each other, a lead wire for grounding will be provided in each configuration.
  • the power converter 100 is connected to the lead wire connecting the connection point 16 and the ground, the lead wire connecting the connection point 17 and the ground, and the connection point 18 and the ground, as in the case of the prior art.
  • a lead wire and a lead wire connecting the connection point 19 and the ground are provided.
  • the power conversion device 100 eliminates the need for lead wires for each configuration by collectively grounding each configuration by the ground wire 21.
  • the power conversion device 100 can reduce the number of parts required for manufacturing the power conversion device 100 as compared with the case where each configuration is grounded independently of each other. Further, in the manufacture of the power conversion device 100, a work process for installing lead wires for each configuration becomes unnecessary. As a result, the power conversion device 100 can reduce the manufacturing cost as compared with the case where each configuration is grounded independently of each other.
  • Ferrite beads 12, 13, 14, and 15 are provided on a wiring pattern that connects the Y capacitors 7a, 7b, 8a, 8b, 9a, 9b, 10a, and 10b and the ground wire 21.
  • the power conversion device 100 can suppress interference between noise on the AC side and noise on the DC side in the wiring pattern.
  • the power conversion device 100 can prevent an increase in noise due to interference between noise on the AC side and noise on the DC side, and can enhance the noise reduction effect.
  • the lead wires used when the configurations are grounded independently of each other usually have a length of 10 cm to 20 cm. Further, a general lead wire has an inductance of 1 nH / cm.
  • each wiring has an inductance equivalent to that of a lead wire by means of ferrite beads 12, 13, 14, 15 provided in each wiring between each configuration and the ground wire 21. I'm letting you. As a result, the power converter 100 can remove noise in the same manner as when the configurations are grounded independently of each other.
  • the number of ground wires 21 provided in the power conversion device 100 is not limited to one, and may be plural.
  • the power conversion device 100 grounds at least a part of a plurality of interphase capacitors, which are an AC side-phase capacitor and a DC-side phase capacitor, at once, so that each of the plurality of phase capacitors is grounded independently of each other.
  • the number of ground wires 21 can be reduced as compared with the above.
  • the electronic circuit configuration of the power converter 100 can be changed according to the performance required in the air conditioner.
  • the frequency and intensity of noise generated in the electronic circuit also change.
  • the power conversion device 100 is provided with ferrite beads 12, 13, 14, and 15 having characteristics that match the noise generated in the electronic circuit.
  • the inductance values of the ferrite beads 12, 13, 14, and 15 can be set to optimum values according to the noise frequency. As a result, the power converter 100 can obtain a higher noise reduction effect.
  • the characteristics of the ferrite beads 12, 13, 14, and 15 may be the same as each other. Further, at least one of the ferrite beads 12, 13, 14 and 15 may have different characteristics from the others.
  • the characteristics of the ferrite beads 12, 13, 14 and 15 can be determined according to the configuration of the electronic circuit. That is, the inductance values of the ferrite beads 12, 13, 14, and 15 can be appropriately determined according to the configuration of the electronic circuit.
  • the inductance values of the ferrite beads 12, 13 and 15 provided on the AC side interphase capacitor and the inductance values of the ferrite beads 14 provided on the DC side interphase capacitor are 20 nH
  • the inductance values of the ferrite beads 14 are 10 nH.
  • the inductance values of the ferrite beads 12, 13, 14, and 15 focus on either suppressing the generation of noise that can be conducted to other components or preventing the conduction of noise from other components. Can be determined by By appropriately determining the inductance values of the ferrite beads 12, 13, 14, and 15, it is possible to classify a circuit in which noise generation is desired to be reduced and a circuit in which noise transmission from other circuits is desired to be prevented.
  • the inductance values of the ferrite beads 12, 13, 14, and 15 can be set in the range of 1 nH to 100 nH.
  • the power conversion device 100 may include electronic components having an inductance component other than the ferrite beads 12, 13, 14, and 15.
  • an electronic component having an inductance component such as a normal mode choke coil can be used.
  • the ferrite beads 12, 13, 14, 15 or the normal mode choke coil is smaller than the common mode choke coils 2 and 3. Therefore, the power conversion device 100 can suppress the enlargement of the electronic circuit as compared with the case where the common mode choke coil similar to the common mode choke coils 2 and 3 is used for the electronic component.
  • the power conversion device 100 can reduce the number of ground wires 21 by using a common ground wire 21 for grounding each of the AC side phase capacitor and the DC side phase capacitor. Further, in the power conversion device 100, electronic components having an inductance component are provided in each of the wiring between the AC side phase capacitor and the ground wire 21 and the wiring between the DC side phase capacitor and the ground wire 21. , Noise can be effectively reduced. As described above, the power conversion device 100 has an effect that noise can be reduced by using a small number of ground wires 21.
  • FIG. 3 is a diagram showing a schematic configuration of a power conversion device according to a second embodiment of the present invention.
  • FIG. 4 is a diagram showing the power conversion device shown in FIG. 3 and a housing used for grounding the power conversion device.
  • the second embodiment an example of a housing used for grounding the power conversion device 100 will be described.
  • the same components as those in the first embodiment are designated by the same reference numerals, and the configurations different from those in the first embodiment will be mainly described.
  • the housing 26 encloses the components in the power conversion device 100 shown in FIG.
  • the wall portion 27 is attached to the inside of the housing 26 and partitions the space inside the housing 26.
  • the housing 26 and the wall portion 27 are formed by using sheet metal.
  • the housing 26 and the wall portion 27 form a shield portion that blocks the conduction of noise.
  • the wiring 24 connects the output terminal of the electronic circuit board 25 and the load 20.
  • the wiring 23 connects the input terminal of the electronic circuit board 25 to the commercial AC power supply 1.
  • the configuration shown in FIG. 3 is the configuration in which the wall portion 27 and the wiring 28 are added to the configuration shown in FIG.
  • FIG. 4 shows a side view of the components provided in the housing 26.
  • the ground wire 21 is connected to the housing 26.
  • the wiring 28 is a wiring for connecting the power conversion device 100 and an external device of the power conversion device 100, and refers to the entire wiring such as communication lines and signal lines other than the wires 23 and 24 and the ground line 21. To do.
  • the wiring 28 includes a wiring for supplying electric power from the power conversion device 100 to the indoor unit, a communication line for communicating with an external control system of the power conversion device 100, and a wiring for supplying electric power to the thermista. And wiring for supplying power to the four-way valve.
  • the thermistor measures the temperature at each part of the air conditioner.
  • the four-way valve switches the refrigerant circuit according to the switching of operation between cooling and heating of the air conditioner.
  • the ground wire 21 and the wiring 23 are the first wiring
  • the wiring 24 and the wiring 28 are the second wiring.
  • the first wiring is a wiring that generates a lot of noise among the wiring provided in the power conversion device 100.
  • the second wiring is wiring other than the first wiring among the wirings provided in the power conversion device 100, and is a wiring that generates less noise than the first wiring.
  • the first wiring is provided in the area surrounded by the housing 26 and the wall portion 27.
  • the second wiring is provided outside the area surrounded by the housing 26 and the wall portion 27.
  • the shield portion including the housing 26 and the wall portion 27 blocks the conduction of noise from the first wiring to the second wiring by surrounding the area where the first wiring is provided.
  • the power conversion device 100 can suppress the noise radiated from the first wiring from being conducted to the second wiring.
  • the power conversion device 100 can prevent problems such as malfunction due to noise conduction from the first wiring to the second wiring.
  • grounding of each interphase capacitor can be easily realized by connecting the grounding wire 21 to the shield portion in the region where the first wiring is provided.
  • the area where the grounding wire 21 is provided can be easily limited as compared with the case where the grounding wire 21 is distributed to each of the interphase capacitors. be able to.
  • the power conversion device 100 can arrange the ground wire 21 away from the wiring that is easily affected by noise. Further, the power conversion device 100 can easily surround the area where the first wiring is provided by the shield portion.
  • the wall portion 27 does not reach the electronic circuit board 25, and a gap is provided between the electronic circuit board 25 and the wall portion 27.
  • the wall portion 27 may reach the electronic circuit board 25.
  • the wall portion 27 may penetrate the electronic circuit board 25.
  • the shield portion can enhance the shielding property that suppresses the conduction of noise.
  • the housing 26 and the wall portion 27 are not limited to those formed by using sheet metal.
  • the housing 26 and the wall portion 27 may be made of a material having a property of suppressing noise conduction.
  • the shape of the shield portion is not limited to the shape composed of the housing 26 and the wall portion 27 shown in FIG. 4, and can be freely changed.
  • the shield portion is not limited to that realized by the housing 26 and the wall portion 27.
  • the shield portion may be realized by components other than the housing 26 and the wall portion 27.
  • the shield portion may be realized by the aluminum electrolytic capacitor used for the smoothing capacitor 11 shown in FIG.
  • the power conversion device 100 can suppress the conduction of noise from the first wiring to the second wiring by providing the shield portion. As a result, the power converter 100 has the effect of being able to further reduce noise.
  • FIG. 5 is a diagram showing a schematic configuration of an air conditioner according to a third embodiment of the present invention.
  • the air conditioner 200 adjusts the temperature and humidity of the indoor space by sending an air flow for air conditioning to the indoor space.
  • the air conditioner 200 switches operation modes such as cooling, blowing, dehumidifying, and heating so that the room temperature becomes a target temperature.
  • the air conditioner 200 is a separate type air conditioner in which the outdoor unit 201 is separated from the indoor unit 202.
  • the outdoor unit 201 and the indoor unit 202 are connected via a refrigerant pipe 36.
  • the refrigerant is filled in the refrigerant pipe 36, and the refrigerant circulates between the outdoor unit 201 and the indoor unit 202 via the refrigerant pipe 36, so that the air conditioner 200 exchanges heat between the indoor and outdoor units. ..
  • the outdoor unit 201 has a compressor 31, a four-way valve 32, an outdoor heat exchanger 33, an expansion valve 34, and a fan 39.
  • the compressor 31 is provided with a compression mechanism 37 that compresses the refrigerant and a motor 38 that operates the compression mechanism 37.
  • the outdoor unit 201 has a power conversion device 100 according to the first or second embodiment.
  • the motor 38 is the load 20 shown in FIG. The motor 38 is driven by the power supply from the power converter 100.
  • the indoor unit 202 has an indoor heat exchanger 35 and a fan 40.
  • the compressor 31, the four-way valve 32, the outdoor heat exchanger 33, the expansion valve 34, and the indoor heat exchanger 35 are connected via a refrigerant pipe 36.
  • the compressor 31, the four-way valve 32, the outdoor heat exchanger 33, the expansion valve 34, and the indoor heat exchanger 35 form a refrigeration cycle that is a closed circuit for circulating the refrigerant.
  • the components of the air conditioner 200 can also be applied to equipment such as a refrigerator or a freezer equipped with a refrigeration cycle.
  • the fan 39 In the outdoor unit 201, the fan 39 generates an air flow by rotation. By generating an air flow, the outdoor unit 201 sends air into the housing of the outdoor unit 201, and sends the air sent into the housing to the outside of the housing.
  • the outdoor heat exchanger 33 causes heat exchange between the air passing through the outdoor heat exchanger 33 and the refrigerant. In FIG. 5, the housing of the outdoor unit 201 is not shown.
  • the indoor unit 202 is connected to the output terminal 22 shown in FIG.
  • the indoor unit 202 operates by receiving power supply from the power conversion device 100.
  • the fan 40 generates an air flow by rotation.
  • the indoor unit 202 sends air into the housing of the indoor unit 202 and sends the air sent into the housing to the outside of the housing.
  • the indoor heat exchanger 35 exchanges heat between the air passing through the indoor heat exchanger 35 and the refrigerant.
  • the housing of the indoor unit 202 is not shown.
  • the power conversion device 100 may output a three-phase AC voltage to a motor that rotates the fan 39 or a motor that rotates the fan 40.
  • the air conditioner 200 has an effect that noise can be reduced by having a small number of ground wires 21 by having the power conversion device 100 according to the first or second embodiment.
  • the power conversion device 100 may be provided in a device other than the air conditioner 200 as long as it is provided in a device connected to the commercial AC power supply 1.
  • the configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Power Conversion In General (AREA)

Abstract

La présente invention concerne un dispositif de conversion de puissance (100) qui comprend : un convertisseur (4) et un onduleur (5) ; une bobine d'arrêt en mode commun (2) connectée entre le convertisseur (4) et une source d'alimentation CA commerciale (1) qui est une source d'alimentation CA ; des condensateurs Y (7a, 7b, 8a, 8b), qui sont des condensateurs d'interphase côté CA connectés entre des lignes d'alimentation qui connectent la source d'alimentation CA et le convertisseur (4) ; et des condensateurs Y (9a, 9b), qui sont des condensateurs d'interphase côté CC connectés entre des lignes d'alimentation qui connectent le convertisseur (4) et l'onduleur (5). Une ligne de mise à la masse partagée (21) est utilisée en tant que masse respective des condensateurs d'interphase côté CA et des condensateurs d'interphase côté CC. Des billes de ferrite (12, 13, 14), qui sont des parties électroniques ayant un composant d'inductance, sont respectivement fournies à un câblage entre les condensateurs d'interphase côté CA et la ligne de mise à la masse (21), et à un câblage entre les condensateurs d'interphase côté CC et la ligne de mise à la masse (21).
PCT/JP2019/016035 2019-04-12 2019-04-12 Dispositif de conversion de puissance et climatiseur WO2020208825A1 (fr)

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PCT/JP2019/016035 WO2020208825A1 (fr) 2019-04-12 2019-04-12 Dispositif de conversion de puissance et climatiseur
JP2021513148A JP7204894B2 (ja) 2019-04-12 2019-04-12 電力変換装置および空気調和機

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PCT/JP2019/016035 WO2020208825A1 (fr) 2019-04-12 2019-04-12 Dispositif de conversion de puissance et climatiseur

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021230137A1 (fr) * 2020-05-15 2021-11-18 株式会社村田製作所 Dispositif de conversion de puissance
JP7421141B1 (ja) 2022-08-01 2024-01-24 ダイキン工業株式会社 ノイズフィルタ及び冷凍サイクル装置

Citations (10)

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JPS57192700U (fr) * 1981-05-30 1982-12-07
JPS59159187U (ja) * 1983-04-12 1984-10-25 ティーディーケイ株式会社 スイッチング電源装置
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