WO2020065878A1 - Power conversion device - Google Patents

Power conversion device Download PDF

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Publication number
WO2020065878A1
WO2020065878A1 PCT/JP2018/036112 JP2018036112W WO2020065878A1 WO 2020065878 A1 WO2020065878 A1 WO 2020065878A1 JP 2018036112 W JP2018036112 W JP 2018036112W WO 2020065878 A1 WO2020065878 A1 WO 2020065878A1
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WO
WIPO (PCT)
Prior art keywords
input
output
terminal
protection circuit
side terminal
Prior art date
Application number
PCT/JP2018/036112
Other languages
French (fr)
Japanese (ja)
Inventor
記一 辻村
Original Assignee
富士電機株式会社
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 富士電機株式会社 filed Critical 富士電機株式会社
Priority to PCT/JP2018/036112 priority Critical patent/WO2020065878A1/en
Priority to CN201880056860.3A priority patent/CN111316554B/en
Priority to JP2020511830A priority patent/JP6801820B2/en
Publication of WO2020065878A1 publication Critical patent/WO2020065878A1/en

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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
    • 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 more particularly, to a power converter having a surge protection circuit.
  • a power conversion device including a surge protection circuit has been known.
  • Such a power converter is disclosed, for example, in Japanese Patent Application Laid-Open No. 2003-88135.
  • JP-A-2003-88135 discloses an inverter motor including a motor and an inverter connected to the motor.
  • the inverter includes an input unit to which AC power is input, and a converter that converts AC power to DC power.
  • a protection circuit for protecting the inverter from a surge current caused by lightning or the like is provided between the input part of the inverter and the converter. This protection circuit is configured such that, when a surge voltage is applied to the protection circuit, an overvoltage flows to the ground as a surge current. This makes it possible to protect the inverter from surges.
  • insulation measurement may be performed by applying a relatively large voltage to the inverter motor.
  • the protection circuit since the protection circuit is provided in the inverter, the applied voltage flows to the ground as a current by the protection circuit. For this reason, there was a disadvantage that a sufficient voltage could not be applied to the portion where the insulation measurement was performed. As a result, it is necessary to remove the motor and the inverter and perform insulation measurement or remove the protection circuit, respectively.
  • JP-A-2003-88135 an electromagnetic switch is provided between the protection circuit and the ground wire. Then, when performing insulation measurement, the protection circuit is electrically disconnected from the ground line by turning off the electromagnetic switch. This makes it possible to appropriately apply the voltage applied for insulation measurement to a portion where insulation measurement is performed.
  • the inverter motor described in JP-A-2003-88135 is provided with an electromagnetic switch for electrically disconnecting the protection circuit from the ground line.
  • an electromagnetic switch for electrically disconnecting the protection circuit from the ground line.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a power conversion device capable of performing a withstand voltage test while suppressing an increase in the size of the device. It is to provide.
  • a power conversion device includes a power conversion unit that converts power supplied from a power supply, an input terminal, an output terminal, and a grounding unit. And a mounting board including a fixedly formed surge protection circuit for flowing a surge current flowing between the input side terminal and the output side terminal to the ground through the ground side terminal. And a wiring that connects the grounding unit side terminal and the grounding unit and that is detachable from the grounding unit side terminal.
  • the power conversion device includes the wiring that connects the grounding unit side terminal and the grounding unit and that is detachable from the grounding unit side terminal.
  • the electrical connection between the surge protection circuit and the grounding part is released by removing the wiring.
  • the voltage applied for the withstand voltage test can be appropriately applied to the portion where the withstand voltage test is performed.
  • the electrical connection (non-connection) between the ground side terminal and the ground portion can be made by relatively small wiring compared to the electromagnetic switch, so that an increase in the size of the power converter is suppressed. be able to.
  • the withstand voltage test can be performed while suppressing an increase in the size of the device.
  • the surge protection circuit since the surge protection circuit is fixedly formed on the mounting board, a case where a detachable cartridge type surge protection circuit (relatively large surge protection circuit) is used. In comparison, the surge protection circuit can be downsized. Thus, the surge protection circuit can be arranged in a relatively narrow space. Further, when a removable surge protection circuit of a cartridge type is used, it is necessary to dispose the surge protection circuit at a position easily accessible to a user in order to remove the surge protection circuit. On the other hand, in the power converter according to the above aspect, the withstand voltage test can be performed without removing the surge protection circuit, so that the degree of freedom in the arrangement position of the surge protection circuit can be improved.
  • the mounting substrate is an input-side substrate provided on the input side of the power conversion unit, an output-side substrate provided on the output side of the power conversion unit, and a communication line from the outside. And at least one of the communication boards to be connected. According to this structure, at least one of the input-side board, the output-side board, and the communication board can be prevented from being enlarged, and the surge protection circuit can be freely arranged on the board. The degree can be improved.
  • the mounting board is provided with an input-side substrate on which an input-side capacitor for removing noise on the input side of the power converter is formed, and an output side for removing noise on the output side of the power converter. And at least one of the output side substrate on which the capacitor is formed.
  • the ground-portion-side terminal is provided near an end of the mounting board.
  • the wiring includes a jumper wire having one end that can be screwed to the mounting board.
  • the jumper wire can be easily attached and detached by screwing or releasing the screwing.
  • the power conversion device further includes a metal housing in which the power conversion unit and the mounting board are stored, and the wiring connects the ground unit side terminal and the housing as the ground unit. It is configured to be. With such a configuration, the housing provided in advance can be used as the grounding portion, so that it is possible to suppress an increase in the number of components, unlike the case where a component as the grounding portion is separately provided.
  • the power conversion unit preferably includes an inverter that converts DC power supplied from the solar panel into AC power.
  • the inverter for converting the DC power supplied from the solar panel into the AC power can perform the withstand voltage test while suppressing an increase in size.
  • the withstand voltage test can be performed while suppressing an increase in the size of the device.
  • FIG. 2 is a block diagram illustrating a configuration of an inverter according to the embodiment.
  • FIG. 3 is a diagram illustrating a configuration of an input side substrate of the inverter according to the present embodiment.
  • FIG. 3 is a diagram illustrating a configuration of a jumper wiring according to the present embodiment.
  • FIG. 3 is a diagram illustrating a configuration of an output side substrate of the inverter according to the present embodiment. It is a figure showing composition of a communication board of an inverter by this embodiment.
  • the inverter 100 is configured to convert electric power supplied from the solar panel 200.
  • the solar panel 200 is an example of the “power source” in the claims.
  • the inverter 100 is an example of the “power conversion device” in the claims.
  • the input substrate 10 is provided in the inverter 100.
  • the detailed configuration of the input side substrate 10 will be described later.
  • the input-side board 10 is an example of the “mounting board” in the claims.
  • the inverter 100 is provided with a DC / AC converter 20 (DC / AC).
  • the DC / AC converter 20 is configured to convert DC power supplied from the solar panel 200 via the input side substrate 10 into AC power.
  • the DC / AC converter 20 is an example of the “power converter” in the claims.
  • the inverter 100 includes the output substrate 30.
  • the detailed configuration of the output side substrate 30 will be described later.
  • the output-side board 30 is an example of the “mounting board” in the claims.
  • the inverter 100 is provided with the communication board 40.
  • the detailed configuration of the communication board 40 will be described later.
  • the communication board 40 is an example of the “mounting board” in the claims.
  • the AC power converted by the inverter 100 is supplied to the system 202 via the transformer 201.
  • the transformer 201 is not provided.
  • the input side substrate 10 is provided on the input side of the DC / AC converter 20.
  • the input side substrate 10 includes an input side terminal 11a (positive side) to which DC power supplied from the solar panel 200 is input, and an input side terminal 11b (negative side). Is provided.
  • the input terminal 11a and the input terminal 11b are provided near the end of the input substrate 10 in the X1 direction.
  • a surge protection circuit 12 is provided on the input side substrate 10.
  • the surge protection circuit 12 is fixedly formed on the input side substrate 10. That is, the surge protection circuit 12 is not configured to be detachable from the input side substrate 10.
  • the surge protection circuit 12 includes a plurality of varistors 12a.
  • the varistor 12a is an electronic component having two electrodes, and has a property that when the voltage between the two powers is low, the electric resistance is high, but when the voltage is higher than a certain level, the electric resistance suddenly decreases. .
  • the plurality of varistors 12a include a wiring 13a connecting the input side terminal 11a (positive side) and an output side terminal 16a (positive side) described later, an input side terminal 11b (negative side), and an output side described later. It is connected between the terminal 16b (negative electrode side) and the wiring 13b connecting the terminal 16b (negative electrode side).
  • the input side substrate 10 is provided with an input side capacitor 14 for removing noise on the input side of the DC / AC converter 20.
  • the input side capacitor 14 includes a plurality of capacitors 14a.
  • the input side capacitor 14 is provided between the surge protection circuit 12 and the output side terminal 16a (positive side) and the output side terminal 16b (negative side).
  • the input-side capacitor 14 is connected between the wiring 13a and the wiring 13b.
  • the wiring 13a is provided with a current detector 15 for detecting a current flowing through the wiring 13a.
  • the current detector 15 is configured by, for example, a current transformer.
  • the input side substrate 10 is provided with an output side terminal 16a (positive side) and an output side terminal 16b (negative side).
  • the output terminal 16a and the output terminal 16b are connected to the wiring 13a and the wiring 13b, respectively.
  • the output terminal 16a and the output terminal 16b are provided near the end of the input substrate 10 in the X2 direction.
  • the input side substrate 10 is provided with a ground portion side terminal 17.
  • the grounding unit side terminal 17 is provided near the end 10a (corner) on the Y1 direction side and the X2 direction side of the input side substrate 10. Further, the ground-side terminal 17 is connected to one end (electrode) of one of the varistors 12 a of the plurality of varistors 12 a and one end of one of the plurality of capacitors 14 a constituting the input-side capacitor 14. Section (electrode).
  • the jumper wire 18 that connects the grounding unit side terminal 17 and the metal housing 60 as the grounding unit is provided.
  • the jumper wire 18 is configured to be detachable from the ground-side terminal 17.
  • the jumper wire 18 means an electric wire, a terminal, a pin, or the like that connects circuits separated from each other.
  • the jumper wire 18 has one end 18 a (terminal) that can be screwed to the input-side substrate 10.
  • the one end 18 a (terminal) is screwed (connected) to the grounding part side terminal 17 by a screw 50.
  • the other end 18b (terminal) is screwed (connected) with a screw 50 by a metal housing 60 as a grounding portion. Also, by releasing the screw 50 from being screwed into the ground terminal 17, the jumper wire 18 is removed from the ground terminal 17. Further, between one end 18a (terminal) and the other end 18b (terminal) of the jumper wire 18, a wiring 18c covered with an insulating member is provided.
  • the metal housing 60 houses the DC / AC converter 20, the input substrate 10, the output substrate 30, and the communication substrate 40.
  • the jumper line 18 is an example of the “wiring” in the claims.
  • the housing 60 is an example of the “ground portion” in the claims.
  • the output side substrate 30 is provided on the output side of the DC / AC converter 20.
  • the output-side board 30 is provided with an input-side terminal 31a, an input-side terminal 31b, and an input-side terminal 31c to which the AC power converted by the DC / AC converter 20 is input.
  • the input terminal 31a, the input terminal 31b, and the input terminal 31c are provided near the end of the output substrate 30 on the Y2 direction side.
  • the output side substrate 30 is provided with a surge protection circuit 32.
  • the surge protection circuit 32 is fixedly formed on the output side substrate 30. That is, the surge protection circuit 32 is not configured to be detachable from the output side substrate 30.
  • the surge protection circuit 32 includes a plurality of varistors 32a. The plurality of varistors 32a are electrically connected between the input terminal 31a, the input terminal 31b, and the input terminal 31c, and the output terminal 36a, the output terminal 36b, and the output terminal 36c described below. I have.
  • an output side capacitor 34 for removing noise on the output side of the DC / AC converter 20 is formed on the output side substrate 30, an output side capacitor 34 for removing noise on the output side of the DC / AC converter 20 is formed.
  • the output-side capacitor 34 includes a plurality of capacitors.
  • the output capacitor 34 is provided between the input terminal 31a, the input terminal 31b, and the input terminal 31c, and the output terminal 36a, the output terminal 36b, and the output terminal 36c.
  • the output side substrate 30 is provided with an output side terminal 36a, an output side terminal 36b, and an output side terminal 36c.
  • the output side terminal 36a, the output side terminal 36b, and the output side terminal 36c are provided near the end of the output side substrate 30 on the Y1 direction side.
  • the output side substrate 30 is provided with a ground portion side terminal 37.
  • the grounding unit side terminal 37 is provided near the end 30a (corner) on the Y1 direction side and the X2 direction side of the output side substrate 30.
  • the jumper wire 38 that connects the ground-side terminal 37 and the metal housing 60 as the ground portion is provided.
  • the configuration of the jumper line 38 is the same as the configuration of the jumper line 18 (see FIG. 3). By unscrewing the screw 50 with the ground terminal 37, the jumper wire 38 is removed from the ground terminal 37.
  • the jumper line 38 is an example of the “wiring” in the claims.
  • the communication board 40 is configured such that a communication line 70 from the outside (outside of the inverter 100) is connected.
  • the communication board 40 is provided with an input terminal 41 to which a communication line 70 (for example, a LAN cable) is connected.
  • the input terminal 41 is provided on the Y2 direction side of the communication board 40.
  • the communication board 40 is provided with a surge protection circuit 42.
  • the surge protection circuit 42 is fixedly formed on the communication board 40. That is, the surge protection circuit 42 is not configured to be detachable from the communication board 40. Further, the surge protection circuit 42 includes a plurality of varistors 42a. The plurality of varistors 42a are provided between the communication board 40 and an output terminal 46 described later.
  • the communication board 40 is provided with an output terminal 46.
  • the output terminal 46 is configured to be electrically connected to, for example, a control board (not shown).
  • the communication board 40 is provided with a grounding section side terminal 47.
  • the grounding unit side terminal 47 is provided near the end 40a (corner) on the Y1 direction side and the X1 direction side of the communication board 40.
  • the jumper wire 48 is provided for connecting the grounding part side terminal 47 to the metal casing 60 as the grounding part.
  • the configuration of the jumper line 48 is the same as the configuration of the jumper line 18 (see FIG. 3). Also, by releasing the screw 50 from being screwed to the ground terminal 47, the jumper wire 48 is removed from the ground terminal 47.
  • the jumper line 48 is an example of the “wiring” in the claims.
  • the grounding part side terminal 17 (the grounding part side terminal 37, the grounding part side terminal 37, the grounding part side terminal 37, the grounding part side terminal 37, the grounding part side terminal 37) is connected to the housing 60.
  • a jumper line 18 (jumper line 38, jumper line 48) that is detachable from the unit side terminal 47) is provided.
  • the electrical connection (non-connection) between the grounding part side terminal 17 (the grounding part side terminal 37 and the grounding part side terminal 47) and the housing 60 is relatively small compared with the electromagnetic switch, and the jumper wire 18 ( This can be performed by the jumper line 38 and the jumper line 48), so that the inverter 100 can be prevented from increasing in size.
  • the withstand voltage test can be performed while suppressing an increase in the size of the device.
  • the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) is fixedly formed on the input-side board 10 (output-side board 30, communication board 40). Therefore, the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) can be reduced in size as compared with the case where a detachable cartridge type surge protection circuit (relatively large surge protection circuit) is used. Thereby, the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) can be arranged in a relatively narrow space. Further, when a removable surge protection circuit of a cartridge type is used, it is necessary to dispose the surge protection circuit at a position easily accessible to a user in order to remove the surge protection circuit. On the other hand, in the inverter 100 of the present embodiment, the withstand voltage test can be performed without removing the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42). The degree of freedom in the arrangement position of the circuit 42) can be improved.
  • the input side substrate 10 provided on the input side of the DC / AC converter 20, the output side substrate 30 provided on the output side of the DC / AC converter 20, and the external communication line 70 are connected.
  • the communication board 40 is provided with a surge protection circuit 12, a surge protection circuit 32, and a surge protection circuit 42, respectively.
  • the size of the board can be suppressed, and the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) in the board can be suppressed. Can be improved in the degree of freedom of the arrangement position.
  • the surge protection circuit 12 and the surge protection circuit 32 are provided on the output side substrate 30 on which the output side capacitor 34 for removing noise is formed, respectively.
  • the surge protection circuit 12 (surge protection circuit 32) and the input-side capacitor 14 (output-side capacitor 34) can be arranged on a common substrate. The number of components (substrates) can be reduced as compared with the case where the capacitors 14 (output side capacitors 34) are arranged on a separate substrate.
  • the ground-portion-side terminal 17 (the ground-portion-side terminal 37, the ground-portion-side terminal 47) is connected to the end 10a of the input-side board 10 (the output-side board 30, the communication board 40). (30a, 40a). Accordingly, unlike the case where the grounding unit side terminals 17 (the grounding unit side terminals 37 and the grounding unit side terminals 47) are provided near the center of the input side substrate 10 (the output side substrate 30 and the communication substrate 40), the case is different.
  • the length of the jumper wire 18 (jumper wire 38, jumper wire 48) connecting the body 60 and the ground portion side terminal 17 (ground portion side terminal 37, ground portion side terminal 47) can be reduced.
  • the jumper wire 18 (jumper wire 38, jumper wire 48) is connected to the input-side board 10 (output-side board 30, communication board 40) by one end which can be screwed. 18a. This makes it possible to easily attach and detach the jumper wires 18 (jumper wires 38 and jumper wires 48) by screwing or releasing the screwing.
  • the jumper wire 18 (jumper wire 38, jumper wire 48) is connected to the ground terminal 17 (ground terminal 37, ground terminal 47) and the ground terminal. It is configured to connect to the housing 60.
  • the housing 60 provided in advance can be used as the grounding portion, so that an increase in the number of components can be suppressed unlike the case where components for the housing 60 are separately provided.
  • the DC / AC converter 20 is configured to convert DC power supplied from the solar panel 200 into AC power. This allows the inverter 100 that converts the DC power supplied from the solar panel 200 to the AC power to perform the withstand voltage test while suppressing an increase in size.
  • grounding unit side terminal and the grounding unit are connected by a jumper wire
  • the present invention is not limited to this.
  • the grounding section side terminal and the grounding section may be connected by a detachable wiring other than a jumper wire.
  • the jumper wire is connected to the ground-side terminal by screwing, but the present invention is not limited to this.
  • the jumper wire and the ground terminal may be connected by a method other than screwing.
  • the surge protection circuit is provided on the input-side board, the output-side board, and the communication board, but the present invention is not limited to this.
  • the surge protection circuit may be provided on any one (or any two) of the input side board, the output side board, and the communication board.
  • the input-side capacitor (output-side capacitor) was provided on the input-side substrate (output-side substrate), but the present invention is not limited to this.
  • the input side capacitor (output side capacitor) may not be provided on the input side substrate (output side substrate).
  • the ground-side terminal is provided near the end of the input-side board, the output-side board, and the communication board, but the present invention is not limited to this.
  • the ground-side terminal can be arranged in a portion other than the vicinity of the end of the input-side board, the output-side board, and the communication board.
  • the present invention is not limited to this.
  • a portion other than the housing may be applied as the grounding portion.
  • a solar panel is used as the “power source” of the present invention, but the present invention is not limited to this.
  • a DC power source other than a solar panel such as a wind power generator, may be used, or an AC power source may be used.
  • the surge protection circuit is configured by the varistor
  • the present invention is not limited to this.
  • the surge protection circuit may be constituted by elements other than the varistor.

Abstract

Provided is a power conversion device with which it is possible to perform a withstand voltage test while minimizing an increase in the size of the device. A power conversion device, provided with: a mounting substrate (10) including a surge protection circuit (12), which is formed in a fixed manner and which channels a surge current, flowing between input-side terminals (11a, 11b) and output-side terminals (16a, 16b), through a grounded part-side terminal (17) to a grounded part (60); and a wire (18) for connecting the grounded-part-side terminal (17) and the grounded part (60), the wire (18) being capable of being attached to and detached from the grounded-part-side terminal (17).

Description

電力変換装置Power converter
　この発明は、電力変換装置に関し、特に、サージ保護回路を備える電力変換装置に関する。 The present invention relates to a power converter, and more particularly, to a power converter having a surge protection circuit.
　従来、サージ保護回路を備える電力変換装置が知られている。このような電力変換装置は、たとえば、特開２００３－８８１３５号公報に開示されている。 Conventionally, a power conversion device including a surge protection circuit has been known. Such a power converter is disclosed, for example, in Japanese Patent Application Laid-Open No. 2003-88135.
　特開２００３－８８１３５号公報では、モータと、モータに接続されるインバータとを備えるインバータモータが開示されている。このインバータは、交流電力が入力される入力部と、交流電力を直流電力に変換するコンバータとを備えている。このインバータの入力部とコンバータとの間には、雷などに起因するサージ電流からインバータを保護するための保護回路が設けられている。この保護回路は、保護回路にサージ電圧が印加されると、過電圧をサージ電流としてアースに流すように構成されている。これにより、サージからインバータを保護することが可能になる。 JP-A-2003-88135 discloses an inverter motor including a motor and an inverter connected to the motor. The inverter includes an input unit to which AC power is input, and a converter that converts AC power to DC power. A protection circuit for protecting the inverter from a surge current caused by lightning or the like is provided between the input part of the inverter and the converter. This protection circuit is configured such that, when a surge voltage is applied to the protection circuit, an overvoltage flows to the ground as a surge current. This makes it possible to protect the inverter from surges.
　ここで、特開２００３－８８１３５号公報に記載のような従来のインバータモータにおいて、インバータモータに比較的大きな電圧を印加することにより、絶縁測定（耐圧試験）を行う場合がある。しかしながら、インバータに保護回路が設けられているので、印加された電圧が保護回路によって電流としてアースに流れてしまう。このため、絶縁測定が行われる部位に十分な電圧が印加できないという不都合があった。その結果、モータやインバータを取り外して、各々、絶縁測定を行うか、または、保護回路を取り外す必要があった。 Here, in a conventional inverter motor as described in JP-A-2003-88135, insulation measurement (withstand voltage test) may be performed by applying a relatively large voltage to the inverter motor. However, since the protection circuit is provided in the inverter, the applied voltage flows to the ground as a current by the protection circuit. For this reason, there was a disadvantage that a sufficient voltage could not be applied to the portion where the insulation measurement was performed. As a result, it is necessary to remove the motor and the inverter and perform insulation measurement or remove the protection circuit, respectively.
　そこで、特開２００３－８８１３５号公報では、保護回路とアース線との間に電磁スイッチが設けられている。そして、絶縁測定を行う際には、電磁スイッチがオフ状態にされることにより、保護回路がアース線から電気的に非接続の状態にされる。これにより、絶縁測定のために印加された電圧を、適切に、絶縁測定が行われる部位に印加することが可能になる。 Therefore, in JP-A-2003-88135, an electromagnetic switch is provided between the protection circuit and the ground wire. Then, when performing insulation measurement, the protection circuit is electrically disconnected from the ground line by turning off the electromagnetic switch. This makes it possible to appropriately apply the voltage applied for insulation measurement to a portion where insulation measurement is performed.
特開２００３－８８１３５号公報JP-A-2003-88135
　しかしながら、特開２００３－８８１３５号公報に記載のインバータモータでは、保護回路をアース線から電気的に非接続の状態にするための電磁スイッチが設けられている。特開２００３－８８１３５号公報には明記されていないが、比較的大きなサージ電流が電磁スイッチを介してアースに流されるため、電磁スイッチは、比較的大型（大容量）のものを使用する必要があると考えられる。このため、特開２００３－８８１３５号公報に記載のインバータモータでは、電磁スイッチが大型化する分、インバータモータが大型化するという問題点があると考えられる。 However, the inverter motor described in JP-A-2003-88135 is provided with an electromagnetic switch for electrically disconnecting the protection circuit from the ground line. Although not specified in JP-A-2003-88135, since a relatively large surge current flows to the ground via the electromagnetic switch, it is necessary to use a relatively large (large capacity) electromagnetic switch. It is believed that there is. For this reason, in the inverter motor described in JP-A-2003-88135, it is considered that there is a problem that the size of the electromagnetic switch is increased and the size of the inverter motor is increased.
　この発明は、上記のような課題を解決するためになされたものであり、この発明の１つの目的は、装置が大型化するのを抑制しながら、耐圧試験を行うことが可能な電力変換装置を提供することである。 SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a power conversion device capable of performing a withstand voltage test while suppressing an increase in the size of the device. It is to provide.
　上記目的を達成するために、この発明の一の局面による電力変換装置は、電源から供給される電力を変換する電力変換部と、入力側端子と、出力側端子と、接地部に接続するための接地部側端子と、入力側端子と出力側端子との間に流れるサージ電流を接地部側端子を介して接地部に流すための固定的に形成されたサージ保護回路とを含む実装基板と、接地部側端子と接地部とを接続する、接地部側端子に対して着脱可能な配線とを備える。 In order to achieve the above object, a power conversion device according to one aspect of the present invention includes a power conversion unit that converts power supplied from a power supply, an input terminal, an output terminal, and a grounding unit. And a mounting board including a fixedly formed surge protection circuit for flowing a surge current flowing between the input side terminal and the output side terminal to the ground through the ground side terminal. And a wiring that connects the grounding unit side terminal and the grounding unit and that is detachable from the grounding unit side terminal.
　この発明の一の局面による電力変換装置は、上記のように、接地部側端子と接地部とを接続する、接地部側端子に対して着脱可能な配線を備える。これにより、耐圧試験を行う際に、配線を取り外すことにより、サージ保護回路と接地部との電気的な接続状態が解除される。その結果、耐圧試験のために印加された電圧を、適切に、耐圧試験が行われる部位に印加することができる。また、接地部側端子と接地部との電気的な接続（非接続）を、電磁スイッチと比較して比較的小型の配線によって行うことができるので、電力変換装置が大型化するのを抑制することができる。これにより、装置が大型化するのを抑制しながら、耐圧試験を行うことができる。 電力 As described above, the power conversion device according to one aspect of the present invention includes the wiring that connects the grounding unit side terminal and the grounding unit and that is detachable from the grounding unit side terminal. Thus, when the withstand voltage test is performed, the electrical connection between the surge protection circuit and the grounding part is released by removing the wiring. As a result, the voltage applied for the withstand voltage test can be appropriately applied to the portion where the withstand voltage test is performed. In addition, the electrical connection (non-connection) between the ground side terminal and the ground portion can be made by relatively small wiring compared to the electromagnetic switch, so that an increase in the size of the power converter is suppressed. be able to. Thus, the withstand voltage test can be performed while suppressing an increase in the size of the device.
　また、上記一の局面による電力変換装置では、サージ保護回路が実装基板に固定的に形成されているので、着脱可能なカートリッジ型のサージ保護回路（比較的大型のサージ保護回路）を用いる場合と比べて、サージ保護回路を小型化することができる。これにより、サージ保護回路を比較的狭いスペースに配置することができる。また、着脱可能なカートリッジ型のサージ保護回路を用いる場合、サージ保護回路を取り外すためにユーザがアクセスしやすい位置にサージ保護回路を配置する必要がある。一方、上記一の局面による電力変換装置では、サージ保護回路を取り外すことなく耐圧試験を行うことができるので、サージ保護回路の配置位置の自由度を向上させることができる。 Further, in the power converter according to the above aspect, since the surge protection circuit is fixedly formed on the mounting board, a case where a detachable cartridge type surge protection circuit (relatively large surge protection circuit) is used. In comparison, the surge protection circuit can be downsized. Thus, the surge protection circuit can be arranged in a relatively narrow space. Further, when a removable surge protection circuit of a cartridge type is used, it is necessary to dispose the surge protection circuit at a position easily accessible to a user in order to remove the surge protection circuit. On the other hand, in the power converter according to the above aspect, the withstand voltage test can be performed without removing the surge protection circuit, so that the degree of freedom in the arrangement position of the surge protection circuit can be improved.
　上記一の局面による電力変換装置において、好ましくは、実装基板は、電力変換部の入力側に設けられる入力側基板と、電力変換部の出力側に設けられる出力側基板と、外部からの通信線が接続される通信基板とのうちの少なくとも１つを含む。このように構成すれば、入力側基板と、出力側基板と、通信基板とのうちの少なくとも１つにおいて、基板の大型化を抑制することができるとともに、基板におけるサージ保護回路の配置位置の自由度を向上させることができる。 In the power conversion device according to the one aspect, preferably, the mounting substrate is an input-side substrate provided on the input side of the power conversion unit, an output-side substrate provided on the output side of the power conversion unit, and a communication line from the outside. And at least one of the communication boards to be connected. According to this structure, at least one of the input-side board, the output-side board, and the communication board can be prevented from being enlarged, and the surge protection circuit can be freely arranged on the board. The degree can be improved.
　この場合、好ましくは、実装基板は、電力変換部の入力側のノイズを除去するための入力側コンデンサが形成された入力側基板と、電力変換部の出力側のノイズを除去するための出力側コンデンサが形成された出力側基板とのうちの少なくとも１つを含む。このように構成すれば、サージ保護回路と入力側コンデンサ（出力側コンデンサ）とを共通の基板に配置することができるので、サージ保護回路と入力側コンデンサ（出力側コンデンサ）とを別個の基板に配置する場合と比べて、部品（基板）の数を低減することができる。 In this case, preferably, the mounting board is provided with an input-side substrate on which an input-side capacitor for removing noise on the input side of the power converter is formed, and an output side for removing noise on the output side of the power converter. And at least one of the output side substrate on which the capacitor is formed. With this configuration, the surge protection circuit and the input capacitor (output capacitor) can be arranged on a common board, so that the surge protection circuit and the input capacitor (output capacitor) are mounted on separate boards. The number of components (substrates) can be reduced as compared with the case of disposing.
　上記一の局面による電力変換装置において、好ましくは、接地部側端子は、実装基板の端部近傍に設けられている。このように構成すれば、接地部側端子が実装基板の中央部近傍に設けられている場合と異なり、接地部と接地部側端子とを接続する配線の長さを短縮することができる。 In the power converter according to the above aspect, preferably, the ground-portion-side terminal is provided near an end of the mounting board. With this configuration, unlike the case where the grounding portion side terminal is provided near the center of the mounting board, the length of the wiring connecting the grounding portion and the grounding portion side terminal can be reduced.
　上記一の局面による電力変換装置において、好ましくは、配線は、実装基板に対してねじ止め可能な一方端部を有するジャンパ線を含む。このように構成すれば、ねじ止め、または、ねじ止めの解除によって、容易に、ジャンパ線の着脱を行うことができる。 In the power conversion device according to the above aspect, preferably, the wiring includes a jumper wire having one end that can be screwed to the mounting board. With this configuration, the jumper wire can be easily attached and detached by screwing or releasing the screwing.
　上記一の局面による電力変換装置において、好ましくは、電力変換部および実装基板が収納される金属製の筐体をさらに備え、配線は、接地部側端子と、接地部としての筐体とを接続するように構成されている。このように構成すれば、予め設けられている筐体を接地部として用いることができるので、接地部としての部品を別途設ける場合と異なり、部品点数が増加するのを抑制することができる。 In the power conversion device according to the above aspect, preferably, the power conversion device further includes a metal housing in which the power conversion unit and the mounting board are stored, and the wiring connects the ground unit side terminal and the housing as the ground unit. It is configured to be. With such a configuration, the housing provided in advance can be used as the grounding portion, so that it is possible to suppress an increase in the number of components, unlike the case where a component as the grounding portion is separately provided.
　上記一の局面による電力変換装置において、好ましくは、電力変換部は、太陽光パネルから供給される直流電力を交流電力に変換するインバータを含む。このように構成すれば、太陽光パネルから供給される直流電力を交流電力に変換するインバータが、大型化するのを抑制しながら耐圧試験を行うことができる。 に お い て In the power conversion device according to the one aspect, the power conversion unit preferably includes an inverter that converts DC power supplied from the solar panel into AC power. According to this structure, the inverter for converting the DC power supplied from the solar panel into the AC power can perform the withstand voltage test while suppressing an increase in size.
　本発明によれば、上記のように、装置が大型化するのを抑制しながら、耐圧試験を行うことができる。 According to the present invention, as described above, the withstand voltage test can be performed while suppressing an increase in the size of the device.
本実施形態によるインバータの構成を示すブロック図である。FIG. 2 is a block diagram illustrating a configuration of an inverter according to the embodiment. 本実施形態によるインバータの入力側基板の構成を示す図である。FIG. 3 is a diagram illustrating a configuration of an input side substrate of the inverter according to the present embodiment. 本実施形態によるジャンパ配線の構成を示す図である。FIG. 3 is a diagram illustrating a configuration of a jumper wiring according to the present embodiment. 本実施形態によるインバータの出力側基板の構成を示す図である。FIG. 3 is a diagram illustrating a configuration of an output side substrate of the inverter according to the present embodiment. 本実施形態によるインバータの通信基板の構成を示す図である。It is a figure showing composition of a communication board of an inverter by this embodiment.
　以下、本発明を具体化した実施形態を図面に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　［本実施形態］
　図１～図５を参照して、本実施形態によるインバータ１００の構成について説明する。 [This embodiment]
The configuration of the inverter 100 according to the present embodiment will be described with reference to FIGS.
　図１に示すように、インバータ１００は、太陽光パネル２００から供給される電力を変換するように構成されている。なお、太陽光パネル２００は、特許請求の範囲の「電源」の一例である。また、インバータ１００は、特許請求の範囲の「電力変換装置」の一例である。 イ ン バ ー タ As shown in FIG. 1, the inverter 100 is configured to convert electric power supplied from the solar panel 200. The solar panel 200 is an example of the “power source” in the claims. The inverter 100 is an example of the “power conversion device” in the claims.
　インバータ１００には、入力側基板１０が設けられている。なお、入力側基板１０の詳細な構成については、後述する。また、入力側基板１０は、特許請求の範囲の「実装基板」の一例である。 (4) The input substrate 10 is provided in the inverter 100. The detailed configuration of the input side substrate 10 will be described later. The input-side board 10 is an example of the “mounting board” in the claims.
　また、インバータ１００には、直流交流変換部２０（ＤＣ／ＡＣ）が設けられている。直流交流変換部２０は、太陽光パネル２００から入力側基板１０を介して供給される直流電力を交流電力に変換するように構成されている。なお、直流交流変換部２０は、特許請求の範囲の「電力変換部」の一例である。 (4) The inverter 100 is provided with a DC / AC converter 20 (DC / AC). The DC / AC converter 20 is configured to convert DC power supplied from the solar panel 200 via the input side substrate 10 into AC power. The DC / AC converter 20 is an example of the “power converter” in the claims.
　また、インバータ１００は、出力側基板３０が設けられている。なお、出力側基板３０の詳細な構成については、後述する。また、出力側基板３０は、特許請求の範囲の「実装基板」の一例である。 {Circle around (2)} The inverter 100 includes the output substrate 30. The detailed configuration of the output side substrate 30 will be described later. The output-side board 30 is an example of the “mounting board” in the claims.
　また、インバータ１００は、通信基板４０が設けられている。なお、通信基板４０の詳細な構成については、後述する。また、通信基板４０は、特許請求の範囲の「実装基板」の一例である。 {Circle around (2)} The inverter 100 is provided with the communication board 40. The detailed configuration of the communication board 40 will be described later. The communication board 40 is an example of the “mounting board” in the claims.
　また、インバータ１００に変換された交流電力は、トランス２０１を介して系統２０２に供給される。なお、トランス２０１が設けられない場合もある。 (4) The AC power converted by the inverter 100 is supplied to the system 202 via the transformer 201. In some cases, the transformer 201 is not provided.
　図１に示すように、入力側基板１０は、直流交流変換部２０の入力側に設けられている。また、図２に示すように、入力側基板１０には、太陽光パネル２００から供給される直流電力が入力される入力側端子１１ａ（正極側）と、入力側端子１１ｂ（負極側）とが設けられている。なお、入力側端子１１ａと、入力側端子１１ｂとは、入力側基板１０のＸ１方向側の端部近傍に設けられている。 (1) As shown in FIG. 1, the input side substrate 10 is provided on the input side of the DC / AC converter 20. As shown in FIG. 2, the input side substrate 10 includes an input side terminal 11a (positive side) to which DC power supplied from the solar panel 200 is input, and an input side terminal 11b (negative side). Is provided. The input terminal 11a and the input terminal 11b are provided near the end of the input substrate 10 in the X1 direction.
　また、入力側基板１０には、サージ保護回路１２が設けられている。サージ保護回路１２は、入力側基板１０に固定的に形成されている。つまり、サージ保護回路１２は、入力側基板１０に対して着脱可能には構成されていない。また、サージ保護回路１２は、複数のバリスタ１２ａから構成されている。なお、バリスタ１２ａとは、２つの電極をもつ電子部品であり、両電力間の電圧が低い場合には電気抵抗が高い一方、ある程度以上に電圧が高くなると急激に電気抵抗が低くなる性質を有する。また、複数のバリスタ１２ａは、入力側端子１１ａ（正極側）と、後述する出力側端子１６ａ（正極側）とを接続する配線１３ａと、入力側端子１１ｂ（負極側）と、後述する出力側端子１６ｂ（負極側）とを接続する配線１３ｂとの間に接続されている。 サ ー ジ Further, a surge protection circuit 12 is provided on the input side substrate 10. The surge protection circuit 12 is fixedly formed on the input side substrate 10. That is, the surge protection circuit 12 is not configured to be detachable from the input side substrate 10. Further, the surge protection circuit 12 includes a plurality of varistors 12a. The varistor 12a is an electronic component having two electrodes, and has a property that when the voltage between the two powers is low, the electric resistance is high, but when the voltage is higher than a certain level, the electric resistance suddenly decreases. . Further, the plurality of varistors 12a include a wiring 13a connecting the input side terminal 11a (positive side) and an output side terminal 16a (positive side) described later, an input side terminal 11b (negative side), and an output side described later. It is connected between the terminal 16b (negative electrode side) and the wiring 13b connecting the terminal 16b (negative electrode side).
　また、入力側基板１０には、直流交流変換部２０の入力側のノイズを除去するための入力側コンデンサ１４が形成されている。入力側コンデンサ１４は、複数のコンデンサ１４ａにより構成されている。また、入力側コンデンサ１４は、サージ保護回路１２と、出力側端子１６ａ（正極側）および出力側端子１６ｂ（負極側）との間に設けられている。また、入力側コンデンサ１４は、配線１３ａと配線１３ｂとの間に接続されている。 {Circle around (4)} The input side substrate 10 is provided with an input side capacitor 14 for removing noise on the input side of the DC / AC converter 20. The input side capacitor 14 includes a plurality of capacitors 14a. The input side capacitor 14 is provided between the surge protection circuit 12 and the output side terminal 16a (positive side) and the output side terminal 16b (negative side). The input-side capacitor 14 is connected between the wiring 13a and the wiring 13b.
　また、配線１３ａには、配線１３ａに流れる電流を検出するための電流検出器１５が設けられている。電流検出器１５は、たとえば、カレントトランスにより構成されている。 {Circle around (5)} The wiring 13a is provided with a current detector 15 for detecting a current flowing through the wiring 13a. The current detector 15 is configured by, for example, a current transformer.
　また、入力側基板１０には、出力側端子１６ａ（正極側）と、出力側端子１６ｂ（負極側）とが設けられている。出力側端子１６ａと、出力側端子１６ｂとは、それぞれ、配線１３ａおよび配線１３ｂに接続されている。また、出力側端子１６ａと、出力側端子１６ｂとは、入力側基板１０のＸ２方向側の端部近傍に設けられている。 The input side substrate 10 is provided with an output side terminal 16a (positive side) and an output side terminal 16b (negative side). The output terminal 16a and the output terminal 16b are connected to the wiring 13a and the wiring 13b, respectively. The output terminal 16a and the output terminal 16b are provided near the end of the input substrate 10 in the X2 direction.
　また、入力側基板１０には、接地部側端子１７が設けられている。本実施形態では、接地部側端子１７は、入力側基板１０のＹ１方向側でかつＸ２方向側の端部１０ａ（角部）近傍に設けられている。また、接地部側端子１７は、複数のバリスタ１２ａのうちの一部のバリスタ１２ａの一方端部（電極）、および、入力側コンデンサ１４を構成する複数のコンデンサ１４ａのうちの一部の一方端部（電極）に接続されている。 接地 Also, the input side substrate 10 is provided with a ground portion side terminal 17. In the present embodiment, the grounding unit side terminal 17 is provided near the end 10a (corner) on the Y1 direction side and the X2 direction side of the input side substrate 10. Further, the ground-side terminal 17 is connected to one end (electrode) of one of the varistors 12 a of the plurality of varistors 12 a and one end of one of the plurality of capacitors 14 a constituting the input-side capacitor 14. Section (electrode).
　ここで、本実施形態では、接地部側端子１７と接地部としての金属製の筐体６０とを接続するジャンパ線１８が設けられている。ジャンパ線１８は、接地部側端子１７に対して着脱可能に構成されている。なお、ジャンパ線１８とは、互いに離間した回路間を接続する電線、端子、ピンなどを意味する。たとえば、本実施形態では、図３に示すように、ジャンパ線１８は、入力側基板１０に対してねじ止め可能な一方端部１８ａ（端子）を有する。また、一方端部１８ａ（端子）は、接地部側端子１７にネジ５０により、ねじ止め（接続）されている。また、他方端部１８ｂ（端子）は、接地部としての金属製の筐体６０により、ネジ５０によりねじ止め（接続）されている。また、ネジ５０の接地部側端子１７に対する螺合を解除することにより、ジャンパ線１８が接地部側端子１７から取り外される。また、ジャンパ線１８の一方端部１８ａ（端子）と他方端部１８ｂ（端子）との間には、絶縁部材により覆われた配線１８ｃが設けられている。なお、金属製の筐体６０には、直流交流変換部２０、入力側基板１０、出力側基板３０および通信基板４０が収納されている。なお、ジャンパ線１８は、特許請求の範囲の「配線」の一例である。また、筐体６０は、特許請求の範囲の「接地部」の一例である。 Here, in the present embodiment, the jumper wire 18 that connects the grounding unit side terminal 17 and the metal housing 60 as the grounding unit is provided. The jumper wire 18 is configured to be detachable from the ground-side terminal 17. Note that the jumper wire 18 means an electric wire, a terminal, a pin, or the like that connects circuits separated from each other. For example, in the present embodiment, as shown in FIG. 3, the jumper wire 18 has one end 18 a (terminal) that can be screwed to the input-side substrate 10. The one end 18 a (terminal) is screwed (connected) to the grounding part side terminal 17 by a screw 50. The other end 18b (terminal) is screwed (connected) with a screw 50 by a metal housing 60 as a grounding portion. Also, by releasing the screw 50 from being screwed into the ground terminal 17, the jumper wire 18 is removed from the ground terminal 17. Further, between one end 18a (terminal) and the other end 18b (terminal) of the jumper wire 18, a wiring 18c covered with an insulating member is provided. The metal housing 60 houses the DC / AC converter 20, the input substrate 10, the output substrate 30, and the communication substrate 40. The jumper line 18 is an example of the “wiring” in the claims. The housing 60 is an example of the “ground portion” in the claims.
　また、図１に示すように、出力側基板３０は、直流交流変換部２０の出力側に設けられている。また、図４に示すように、出力側基板３０には、直流交流変換部２０に変換された交流電力が入力される入力側端子３１ａ、入力側端子３１ｂおよび入力側端子３１ｃが設けられている。入力側端子３１ａ、入力側端子３１ｂおよび入力側端子３１ｃは、出力側基板３０のＹ２方向側の端部近傍に設けられている。 {Circle around (1)} As shown in FIG. 1, the output side substrate 30 is provided on the output side of the DC / AC converter 20. As shown in FIG. 4, the output-side board 30 is provided with an input-side terminal 31a, an input-side terminal 31b, and an input-side terminal 31c to which the AC power converted by the DC / AC converter 20 is input. . The input terminal 31a, the input terminal 31b, and the input terminal 31c are provided near the end of the output substrate 30 on the Y2 direction side.
　また、出力側基板３０には、サージ保護回路３２が設けられている。サージ保護回路３２は、出力側基板３０に固定的に形成されている。つまり、サージ保護回路３２は、出力側基板３０に対して着脱可能には構成されていない。また、サージ保護回路３２は、複数のバリスタ３２ａから構成されている。また、複数のバリスタ３２ａは、入力側端子３１ａ、入力側端子３１ｂおよび入力側端子３１ｃと、後述する出力側端子３６ａ、出力側端子３６ｂおよび出力側端子３６ｃとの間に電気的に接続されている。 (4) The output side substrate 30 is provided with a surge protection circuit 32. The surge protection circuit 32 is fixedly formed on the output side substrate 30. That is, the surge protection circuit 32 is not configured to be detachable from the output side substrate 30. Further, the surge protection circuit 32 includes a plurality of varistors 32a. The plurality of varistors 32a are electrically connected between the input terminal 31a, the input terminal 31b, and the input terminal 31c, and the output terminal 36a, the output terminal 36b, and the output terminal 36c described below. I have.
　また、出力側基板３０には、直流交流変換部２０の出力側のノイズを除去するための出力側コンデンサ３４が形成されている。出力側コンデンサ３４は、複数のコンデンサにより構成されている。また、出力側コンデンサ３４は、入力側端子３１ａ、入力側端子３１ｂおよび入力側端子３１ｃと、出力側端子３６ａ、出力側端子３６ｂおよび出力側端子３６ｃとの間に設けられている。 {Circle around (4)} On the output side substrate 30, an output side capacitor 34 for removing noise on the output side of the DC / AC converter 20 is formed. The output-side capacitor 34 includes a plurality of capacitors. The output capacitor 34 is provided between the input terminal 31a, the input terminal 31b, and the input terminal 31c, and the output terminal 36a, the output terminal 36b, and the output terminal 36c.
　また、出力側基板３０には、出力側端子３６ａと、出力側端子３６ｂと、出力側端子３６ｃとが設けられている。出力側端子３６ａと、出力側端子３６ｂと、出力側端子３６ｃとは、出力側基板３０のＹ１方向側の端部近傍に設けられている。 Further, the output side substrate 30 is provided with an output side terminal 36a, an output side terminal 36b, and an output side terminal 36c. The output side terminal 36a, the output side terminal 36b, and the output side terminal 36c are provided near the end of the output side substrate 30 on the Y1 direction side.
　また、出力側基板３０には、接地部側端子３７が設けられている。本実施形態では、接地部側端子３７は、出力側基板３０のＹ１方向側でかつＸ２方向側の端部３０ａ（角部）近傍に設けられている。 {Circle around (2)} The output side substrate 30 is provided with a ground portion side terminal 37. In the present embodiment, the grounding unit side terminal 37 is provided near the end 30a (corner) on the Y1 direction side and the X2 direction side of the output side substrate 30.
　また、本実施形態では、接地部側端子３７と接地部としての金属製の筐体６０とを接続するジャンパ線３８が設けられている。なお、ジャンパ線３８の構成は、ジャンパ線１８（図３参照）の構成と同様である。また、ネジ５０の接地部側端子３７に対する螺合を解除することにより、ジャンパ線３８が接地部側端子３７から取り外される。なお、ジャンパ線３８は、特許請求の範囲の「配線」の一例である。 Also, in the present embodiment, the jumper wire 38 that connects the ground-side terminal 37 and the metal housing 60 as the ground portion is provided. Note that the configuration of the jumper line 38 is the same as the configuration of the jumper line 18 (see FIG. 3). By unscrewing the screw 50 with the ground terminal 37, the jumper wire 38 is removed from the ground terminal 37. The jumper line 38 is an example of the “wiring” in the claims.
　図５に示すように、通信基板４０は、外部（インバータ１００の外部）からの通信線７０が接続されるように構成されている。通信基板４０には、通信線７０（たとえば、ＬＡＮケーブル）が接続される、入力側端子４１が設けられている。入力側端子４１は、通信基板４０のＹ２方向側に設けられている。 (5) As shown in FIG. 5, the communication board 40 is configured such that a communication line 70 from the outside (outside of the inverter 100) is connected. The communication board 40 is provided with an input terminal 41 to which a communication line 70 (for example, a LAN cable) is connected. The input terminal 41 is provided on the Y2 direction side of the communication board 40.
　また、通信基板４０には、サージ保護回路４２が設けられている。サージ保護回路４２は、通信基板４０に固定的に形成されている。つまり、サージ保護回路４２は、通信基板４０に対して着脱可能には構成されていない。また、サージ保護回路４２は、複数のバリスタ４２ａから構成されている。また、複数のバリスタ４２ａは、通信基板４０と、後述する出力側端子４６との間に設けられている。 (4) The communication board 40 is provided with a surge protection circuit 42. The surge protection circuit 42 is fixedly formed on the communication board 40. That is, the surge protection circuit 42 is not configured to be detachable from the communication board 40. Further, the surge protection circuit 42 includes a plurality of varistors 42a. The plurality of varistors 42a are provided between the communication board 40 and an output terminal 46 described later.
　また、通信基板４０には、出力側端子４６が設けられている。出力側端子４６は、たとえば、図示しない制御基板などに電気的に接続されるように構成されている。 (4) The communication board 40 is provided with an output terminal 46. The output terminal 46 is configured to be electrically connected to, for example, a control board (not shown).
　また、通信基板４０には、接地部側端子４７が設けられている。本実施形態では、接地部側端子４７は、通信基板４０のＹ１方向側でかつＸ１方向側の端部４０ａ（角部）近傍に設けられている。 {Circle around (5)} The communication board 40 is provided with a grounding section side terminal 47. In the present embodiment, the grounding unit side terminal 47 is provided near the end 40a (corner) on the Y1 direction side and the X1 direction side of the communication board 40.
　本実施形態では、接地部側端子４７と接地部としての金属製の筐体６０とを接続するジャンパ線４８が設けられている。なお、ジャンパ線４８の構成は、ジャンパ線１８（図３参照）の構成と同様である。また、ネジ５０の接地部側端子４７に対する螺合を解除することにより、ジャンパ線４８が接地部側端子４７から取り外される。なお、ジャンパ線４８は、特許請求の範囲の「配線」の一例である。 In the present embodiment, the jumper wire 48 is provided for connecting the grounding part side terminal 47 to the metal casing 60 as the grounding part. Note that the configuration of the jumper line 48 is the same as the configuration of the jumper line 18 (see FIG. 3). Also, by releasing the screw 50 from being screwed to the ground terminal 47, the jumper wire 48 is removed from the ground terminal 47. The jumper line 48 is an example of the “wiring” in the claims.
　（耐圧試験）
　耐圧試験では、インバータ１００に比較的大きな電圧が印加される。これにより、インバータ１００を構成する機器（コンデンサ１４ａなど）の耐圧試験が行われる。耐圧試験を行う際には、ジャンパ線１８、ジャンパ線３８およびジャンパ線４８が取り外される。これにより、サージ保護回路１２、サージ保護回路３２およびサージ保護回路４２が機能しないので、耐圧試験の対象となる機器に比較的大きな電圧が印加される。また、耐圧試験を行わない通常時には、ジャンパ線１８、ジャンパ線３８およびジャンパ線４８が取り付けられる。これにより、雷などに起因するサージ電流は、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）、および、ジャンパ線１８（ジャンパ線３８、ジャンパ線４８）を介して、接地部としての筐体６０に流れる。これにより、雷などに起因するサージ電流からインバータ１００が保護される。 (Pressure test)
In the withstand voltage test, a relatively large voltage is applied to the inverter 100. As a result, a withstand voltage test is performed on the components (such as the capacitor 14a) constituting the inverter 100. When performing the withstand voltage test, the jumper line 18, the jumper line 38, and the jumper line 48 are removed. As a result, the surge protection circuit 12, the surge protection circuit 32, and the surge protection circuit 42 do not function, so that a relatively large voltage is applied to the device to be subjected to the withstand voltage test. In normal times when the withstand voltage test is not performed, the jumper line 18, the jumper line 38, and the jumper line 48 are attached. As a result, a surge current caused by lightning or the like is supplied to the ground portion via the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) and the jumper wire 18 (jumper wire 38, jumper wire 48). It flows to the housing 60. As a result, the inverter 100 is protected from a surge current caused by lightning or the like.
　[本実施形態の効果]
　本実施形態では、以下のような効果を得ることができる。 [Effect of this embodiment]
In the present embodiment, the following effects can be obtained.
　本実施形態では、上記のように、接地部側端子１７（接地部側端子３７、接地部側端子４７）と筐体６０とを接続する、接地部側端子１７（接地部側端子３７、接地部側端子４７）に対して着脱可能なジャンパ線１８（ジャンパ線３８、ジャンパ線４８）を備える。これにより、耐圧試験を行う際に、ジャンパ線１８（ジャンパ線３８、ジャンパ線４８）を取り外すことにより、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）と筐体６０との電気的な接続状態が解除される。その結果、耐圧試験のために印加された電圧を、適切に、耐圧試験が行われる部位に印加することができる。また、接地部側端子１７（接地部側端子３７、接地部側端子４７）と筐体６０との電気的な接続（非接続）を、電磁スイッチと比較して比較的小型のジャンパ線１８（ジャンパ線３８、ジャンパ線４８）によって行うことができるので、インバータ１００が大型化するのを抑制することができる。これにより、装置が大型化するのを抑制しながら、耐圧試験を行うことができる。 In the present embodiment, as described above, the grounding part side terminal 17 (the grounding part side terminal 37, the grounding part side terminal 37, the grounding part side terminal 37, the grounding part side terminal 37) is connected to the housing 60. A jumper line 18 (jumper line 38, jumper line 48) that is detachable from the unit side terminal 47) is provided. Thus, when the withstand voltage test is performed, the electrical connection between the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) and the housing 60 can be achieved by removing the jumper wires 18 (jumper wires 38, 48). Connection state is released. As a result, the voltage applied for the withstand voltage test can be appropriately applied to the portion where the withstand voltage test is performed. Further, the electrical connection (non-connection) between the grounding part side terminal 17 (the grounding part side terminal 37 and the grounding part side terminal 47) and the housing 60 is relatively small compared with the electromagnetic switch, and the jumper wire 18 ( This can be performed by the jumper line 38 and the jumper line 48), so that the inverter 100 can be prevented from increasing in size. Thus, the withstand voltage test can be performed while suppressing an increase in the size of the device.
　また、本実施形態では、上記のように、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）が入力側基板１０（出力側基板３０、通信基板４０）に固定的に形成されているので、着脱可能なカートリッジ型のサージ保護回路（比較的大型のサージ保護回路）を用いる場合と比べて、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）を小型化することができる。これにより、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）を比較的狭いスペースに配置することができる。また、着脱可能なカートリッジ型のサージ保護回路を用いる場合、サージ保護回路を取り外すためにユーザがアクセスしやすい位置にサージ保護回路を配置する必要がある。一方、本実施形態のインバータ１００では、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）を取り外すことなく耐圧試験を行うことができるので、サージ保護回路１２（サージ保護回路３２、サージ保護回路４２）の配置位置の自由度を向上させることができる。 Further, in the present embodiment, as described above, the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) is fixedly formed on the input-side board 10 (output-side board 30, communication board 40). Therefore, the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) can be reduced in size as compared with the case where a detachable cartridge type surge protection circuit (relatively large surge protection circuit) is used. Thereby, the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) can be arranged in a relatively narrow space. Further, when a removable surge protection circuit of a cartridge type is used, it is necessary to dispose the surge protection circuit at a position easily accessible to a user in order to remove the surge protection circuit. On the other hand, in the inverter 100 of the present embodiment, the withstand voltage test can be performed without removing the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42). The degree of freedom in the arrangement position of the circuit 42) can be improved.
　また、本実施形態では、直流交流変換部２０の入力側に設けられる入力側基板１０と、直流交流変換部２０の出力側に設けられる出力側基板３０と、外部からの通信線７０が接続される通信基板４０とに、それぞれ、サージ保護回路１２、サージ保護回路３２、および、サージ保護回路４２が設けられている。これにより、入力側基板１０と、出力側基板３０と、通信基板４０とにおいて、基板の大型化を抑制することができるとともに、基板におけるサージ保護回路１２（サージ保護回路３２、サージ保護回路４２）の配置位置の自由度を向上させることができる。 In the present embodiment, the input side substrate 10 provided on the input side of the DC / AC converter 20, the output side substrate 30 provided on the output side of the DC / AC converter 20, and the external communication line 70 are connected. The communication board 40 is provided with a surge protection circuit 12, a surge protection circuit 32, and a surge protection circuit 42, respectively. Thereby, in the input side board 10, the output side board 30, and the communication board 40, the size of the board can be suppressed, and the surge protection circuit 12 (surge protection circuit 32, surge protection circuit 42) in the board can be suppressed. Can be improved in the degree of freedom of the arrangement position.
　また、本実施形態では、上記のように、直流交流変換部２０の入力側のノイズを除去するための入力側コンデンサ１４が形成された入力側基板１０と、直流交流変換部２０の出力側のノイズを除去するための出力側コンデンサ３４が形成された出力側基板３０とに、それぞれ、サージ保護回路１２、および、サージ保護回路３２が設けられている。これにより、サージ保護回路１２（サージ保護回路３２）と入力側コンデンサ１４（出力側コンデンサ３４）とを共通の基板に配置することができるので、サージ保護回路１２（サージ保護回路３２）と入力側コンデンサ１４（出力側コンデンサ３４）とを別個の基板に配置する場合と比べて、部品（基板）の数を低減することができる。 Further, in the present embodiment, as described above, the input side substrate 10 on which the input side capacitor 14 for removing noise on the input side of the DC / AC converter 20 is provided, and the output side of the DC / AC converter 20 is provided. The surge protection circuit 12 and the surge protection circuit 32 are provided on the output side substrate 30 on which the output side capacitor 34 for removing noise is formed, respectively. Thus, the surge protection circuit 12 (surge protection circuit 32) and the input-side capacitor 14 (output-side capacitor 34) can be arranged on a common substrate. The number of components (substrates) can be reduced as compared with the case where the capacitors 14 (output side capacitors 34) are arranged on a separate substrate.
　また、本実施形態では、上記のように、接地部側端子１７（接地部側端子３７、接地部側端子４７）は、入力側基板１０（出力側基板３０、通信基板４０）の端部１０ａ（３０ａ、４０ａ）近傍に設けられている。これにより、接地部側端子１７（接地部側端子３７、接地部側端子４７）が入力側基板１０（出力側基板３０、通信基板４０）の中央部近傍に設けられている場合と異なり、筐体６０と接地部側端子１７（接地部側端子３７、接地部側端子４７）とを接続するジャンパ線１８（ジャンパ線３８、ジャンパ線４８）の長さを短縮することができる。 Further, in the present embodiment, as described above, the ground-portion-side terminal 17 (the ground-portion-side terminal 37, the ground-portion-side terminal 47) is connected to the end 10a of the input-side board 10 (the output-side board 30, the communication board 40). (30a, 40a). Accordingly, unlike the case where the grounding unit side terminals 17 (the grounding unit side terminals 37 and the grounding unit side terminals 47) are provided near the center of the input side substrate 10 (the output side substrate 30 and the communication substrate 40), the case is different. The length of the jumper wire 18 (jumper wire 38, jumper wire 48) connecting the body 60 and the ground portion side terminal 17 (ground portion side terminal 37, ground portion side terminal 47) can be reduced.
　また、本実施形態では、上記のように、ジャンパ線１８（ジャンパ線３８、ジャンパ線４８）は、入力側基板１０（出力側基板３０、通信基板４０）に対してねじ止め可能な一方端部１８ａを有する。これにより、ねじ止め、または、ねじ止めの解除によって、容易に、ジャンパ線１８（ジャンパ線３８、ジャンパ線４８）の着脱を行うことができる。 In the present embodiment, as described above, the jumper wire 18 (jumper wire 38, jumper wire 48) is connected to the input-side board 10 (output-side board 30, communication board 40) by one end which can be screwed. 18a. This makes it possible to easily attach and detach the jumper wires 18 (jumper wires 38 and jumper wires 48) by screwing or releasing the screwing.
　また、本実施形態では、上記のように、ジャンパ線１８（ジャンパ線３８、ジャンパ線４８）は、接地部側端子１７（接地部側端子３７、接地部側端子４７）と、接地部としての筐体６０とを接続するように構成されている。これにより、予め設けられている筐体６０を接地部として用いることができるので、筐体６０としての部品を別途設ける場合と異なり、部品点数が増加するのを抑制することができる。 Further, in the present embodiment, as described above, the jumper wire 18 (jumper wire 38, jumper wire 48) is connected to the ground terminal 17 (ground terminal 37, ground terminal 47) and the ground terminal. It is configured to connect to the housing 60. Thus, the housing 60 provided in advance can be used as the grounding portion, so that an increase in the number of components can be suppressed unlike the case where components for the housing 60 are separately provided.
　また、本実施形態では、上記のように、直流交流変換部２０は、太陽光パネル２００から供給される直流電力を交流電力に変換するように構成されている。これにより、太陽光パネル２００から供給される直流電力を交流電力に変換するインバータ１００が、大型化するのを抑制しながら耐圧試験を行うことができる。 In addition, in the present embodiment, as described above, the DC / AC converter 20 is configured to convert DC power supplied from the solar panel 200 into AC power. This allows the inverter 100 that converts the DC power supplied from the solar panel 200 to the AC power to perform the withstand voltage test while suppressing an increase in size.
　[変形例]
　なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更（変形例）が含まれる。 [Modification]
It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and includes all equivalents (modifications) within the scope and meaning equivalent to the claims.
　たとえば、上記実施形態では、接地部側端子と接地部（筐体）とをジャンパ線によって接続する例を示したが、本発明はこれに限られない。たとえば、接地部側端子と接地部とをジャンパ線以外の着脱可能な配線によって接続してもよい。 For example, in the above-described embodiment, an example is shown in which the grounding unit side terminal and the grounding unit (housing) are connected by a jumper wire, but the present invention is not limited to this. For example, the grounding section side terminal and the grounding section may be connected by a detachable wiring other than a jumper wire.
　また、上記実施形態では、ジャンパ線が接地部側端子に対してネジ止めにより接続されている例を示したが、本発明はこれに限られない。たとえば、ジャンパ線と接地部側端子とをネジ止め以外の方法により接続してもよい。 Also, in the above-described embodiment, an example is shown in which the jumper wire is connected to the ground-side terminal by screwing, but the present invention is not limited to this. For example, the jumper wire and the ground terminal may be connected by a method other than screwing.
　また、上記実施形態では、サージ保護回路が、入力側基板、出力側基板および通信基板に設けられている例を示したが、本発明はこれに限られない。たとえば、サージ保護回路が、入力側基板、出力側基板および通信基板のうちのいずれか１つ（または、いずれか２つ）に設けられていてもよい。 Also, in the above-described embodiment, an example is described in which the surge protection circuit is provided on the input-side board, the output-side board, and the communication board, but the present invention is not limited to this. For example, the surge protection circuit may be provided on any one (or any two) of the input side board, the output side board, and the communication board.
　また、上記実施形態では、入力側基板（出力側基板）に、入力側コンデンサ（出力側コンデンサ）が設けられている例を示したが、本発明はこれに限られない。たとえば、入力側基板（出力側基板）に、入力側コンデンサ（出力側コンデンサ）が設けられていなくてもよい。 Also, in the above embodiment, an example was described in which the input-side capacitor (output-side capacitor) was provided on the input-side substrate (output-side substrate), but the present invention is not limited to this. For example, the input side capacitor (output side capacitor) may not be provided on the input side substrate (output side substrate).
　また、上記実施形態では、接地部側端子は、入力側基板、出力側基板および通信基板の端部近傍に設けられている例を示したが、本発明はこれに限られない。本発明では、接地部側端子を、入力側基板、出力側基板および通信基板の端部近傍以外の部分に配置することも可能である。 Also, in the above-described embodiment, an example is described in which the ground-side terminal is provided near the end of the input-side board, the output-side board, and the communication board, but the present invention is not limited to this. In the present invention, the ground-side terminal can be arranged in a portion other than the vicinity of the end of the input-side board, the output-side board, and the communication board.
　また、上記実施形態では、接地部として金属製の筐体が適用される例を示したが、本発明はこれに限られない。本発明では、筐体以外の部分を接地部として適用してもよい。 Also, in the above embodiment, the example in which the metal casing is applied as the grounding unit has been described, but the present invention is not limited to this. In the present invention, a portion other than the housing may be applied as the grounding portion.
　また、上記実施形態では、本発明の「電源」として、太陽光パネルを用いる例を示したが、本発明はこれに限られない。たとえば、本発明の「電源」として、風力発電装置などの太陽光パネル以外の直流電源を用いてもよいし、交流電源を用いてもよい。 Also, in the above-described embodiment, an example is described in which a solar panel is used as the “power source” of the present invention, but the present invention is not limited to this. For example, as the “power source” of the present invention, a DC power source other than a solar panel, such as a wind power generator, may be used, or an AC power source may be used.
　また、上記実施形態では、バリスタによってサージ保護回路が構成されている例を示したが、本発明はこれに限られない。本発明では、バリスタ以外の素子によってサージ保護回路が構成されていてもよい。 Also, in the above embodiment, the example in which the surge protection circuit is configured by the varistor has been described, but the present invention is not limited to this. In the present invention, the surge protection circuit may be constituted by elements other than the varistor.
　１０　入力側基板（実装基板）
　１０ａ　端部
　１１ａ、１１ｂ　入力側端子
　１２　サージ保護回路
　１４　入力側コンデンサ
　１６ａ、１６ｂ　出力側端子
　１７　接地部側端子
　１８、３８、４８　ジャンパ線（配線）
　２０　直流交流変換部（電力変換部）
　３０　出力側基板（実装基板）
　３０ａ　端部
　３１ａ、３１ｂ、３１ｃ　入力側端子
　３２　サージ保護回路
　３４　出力側コンデンサ
　３６ａ、３６ｂ、３６ｃ　出力側端子
　３７　接地部側端子
　４０　通信基板（実装基板）
　４０ａ　端部
　４１　入力側端子
　４２　サージ保護回路
　４６　出力側端子
　４７　接地部側端子
　６０　筐体（接地部）
　７０　通信線
　１００　インバータ（電力変換装置）
　２００　太陽光パネル（電源） 10. Input side board (mounting board)
10a End 11a, 11b Input side terminal 12 Surge protection circuit 14 Input side capacitor 16a, 16b Output side terminal 17 Grounding side terminal 18, 38, 48 Jumper wire (wiring)
20 DC / AC converter (power converter)
30 Output side board (mounting board)
30a End 31a, 31b, 31c Input Terminal 32 Surge Protection Circuit 34 Output Capacitor 36a, 36b, 36c Output Terminal 37 Ground Terminal 40 Communication Board (Mounting Board)
40a End 41 Input-side terminal 42 Surge protection circuit 46 Output-side terminal 47 Grounding-side terminal 60 Housing (grounding)
70 communication line 100 inverter (power conversion device)
200 Solar panel (power supply)

Claims (7)

  1. 　電源から供給される電力を変換する電力変換部と、
    　入力側端子と、出力側端子と、接地部に接続するための接地部側端子と、前記入力側端子と前記出力側端子との間に流れるサージ電流を前記接地部側端子を介して前記接地部に流すための固定的に形成されたサージ保護回路とを含む実装基板と、
    　前記接地部側端子と前記接地部とを接続する、前記接地部側端子に対して着脱可能な配線とを備える、電力変換装置。     A power conversion unit that converts power supplied from a power supply,
    An input-side terminal, an output-side terminal, a ground-side terminal for connection to a grounding section, and a surge current flowing between the input-side terminal and the output-side terminal through the ground-side terminal. A mounting board including a fixedly formed surge protection circuit for flowing to the part,
    A power converter, comprising: a wiring that connects the grounding unit side terminal and the grounding unit and that is detachable from the grounding unit side terminal.
  2. 　前記実装基板は、前記電力変換部の入力側に設けられる入力側基板と、前記電力変換部の出力側に設けられる出力側基板と、外部からの通信線が接続される通信基板とのうちの少なくとも１つを含む、請求項１に記載の電力変換装置。 The mounting board is an input-side board provided on the input side of the power converter, an output-side board provided on the output side of the power converter, and a communication board to which a communication line from the outside is connected. The power converter according to claim 1, comprising at least one.
  3. 　前記実装基板は、前記電力変換部の入力側のノイズを除去するための入力側コンデンサが形成された前記入力側基板と、前記電力変換部の出力側のノイズを除去するための出力側コンデンサが形成された前記出力側基板とのうちの少なくとも１つを含む、請求項２に記載の電力変換装置。 The mounting substrate includes an input-side substrate on which an input-side capacitor for removing input-side noise of the power converter is formed, and an output-side capacitor for removing output-side noise of the power converter. The power conversion device according to claim 2, further comprising at least one of the formed output-side substrate.
  4. 　前記接地部側端子は、前記実装基板の端部近傍に設けられている、請求項１～３のいずれか１項に記載の電力変換装置。 (4) The power converter according to any one of (1) to (3), wherein the ground side terminal is provided near an end of the mounting board.
  5. 　前記配線は、前記実装基板に対してねじ止め可能な一方端部を有するジャンパ線を含む、請求項１～４のいずれか１項に記載の電力変換装置。 (5) The power conversion device according to any one of (1) to (4), wherein the wiring includes a jumper wire having one end that can be screwed to the mounting board.
  6. 　前記電力変換部および前記実装基板が収納される金属製の筐体をさらに備え、
    　前記配線は、前記接地部側端子と、前記接地部としての前記筐体とを接続するように構成されている、請求項１～５のいずれか１項に記載の電力変換装置。     The power converter further includes a metal housing in which the mounting board is stored,
    The power converter according to any one of claims 1 to 5, wherein the wiring is configured to connect the grounding unit side terminal and the housing as the grounding unit.
  7. 　前記電力変換部は、太陽光パネルから供給される直流電力を交流電力に変換するように構成されている、請求項１～６のいずれか１項に記載の電力変換装置。 The power converter according to any one of claims 1 to 6, wherein the power converter is configured to convert DC power supplied from the solar panel into AC power.
PCT/JP2018/036112 2018-09-27 2018-09-27 Power conversion device WO2020065878A1 (en)

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