JP2006170677A - Grounding detection circuitry of inverter device - Google Patents

Grounding detection circuitry of inverter device Download PDF

Info

Publication number
JP2006170677A
JP2006170677A JP2004360729A JP2004360729A JP2006170677A JP 2006170677 A JP2006170677 A JP 2006170677A JP 2004360729 A JP2004360729 A JP 2004360729A JP 2004360729 A JP2004360729 A JP 2004360729A JP 2006170677 A JP2006170677 A JP 2006170677A
Authority
JP
Japan
Prior art keywords
ground fault
detection circuit
hall
inverter device
fault detection
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2004360729A
Other languages
Japanese (ja)
Inventor
Sadaaki Yamazaki
貞明 山崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
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 Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP2004360729A priority Critical patent/JP2006170677A/en
Publication of JP2006170677A publication Critical patent/JP2006170677A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Inverter Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grounding detection circuit which is cheap and space-saving. <P>SOLUTION: The grounding detection circuit of the inverter device comprises a wiring pattern 2 for power supply provided on a printed substrate 4, a pair of parallel wiring patterns provided on the printed substrate 4, and a Hall IC 1 provided near the wiring pattern 2, and detects the magnetic flux generated by the reciprocating current flowing in the parallel wiring pattern. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、インバータ装置等の地絡を検出する地絡検出回路に関する。   The present invention relates to a ground fault detection circuit that detects a ground fault of an inverter device or the like.

従来のインバータ装置の地絡検出回路として、零相電流検出器を用いたものがある（例えば、特許文献１参照）。
図４は、インバータ装置に適用された従来の地絡検出回路である。図４において、５はインバータ装置であり、５１の整流部、５２のインバータ部からなる。６はモータ、７は地絡を検出する零相電流検出器である。８は地絡を示す地絡線である。
零相電流検出器７は、図５のブロック図に示すように、ホール素子７１、コア７５、巻線７６、安定化電源７２および増幅器７３からなる。
この地絡検出回路は次のように動作する。先ず、インバータ装置５は整流部５１で整流された電力をインバータ部５２で電力変換しモータ６を駆動する。このとき地絡がない場合、整流部５１からの直流電流Ia、Ibは等しい。したがって、ホール素子７１は何も検出せず増幅器７３の出力はゼロである。すなわち、零相電流検出器７は動作しない。一方、地絡が発生した場合、地絡線８の回路となり直流電流Ia、Ibは異なる。そうすると、ホール素子７１はコア７５に発生した磁界を検出し増幅器７３に出力が現れる。そしてこの零相電流検出器の出力は図示しない保護装置を作動させる。
特開平０７−１４０１９１（第３頁、図１） As a ground fault detection circuit of a conventional inverter device, there is one using a zero-phase current detector (see, for example, Patent Document 1).
FIG. 4 is a conventional ground fault detection circuit applied to an inverter device. In FIG. 4, reference numeral 5 denotes an inverter device, which includes 51 rectification units and 52 inverter units. 6 is a motor, and 7 is a zero-phase current detector that detects a ground fault. 8 is a ground fault line indicating a ground fault.
As shown in the block diagram of FIG. 5, the zero-phase current detector 7 includes a hall element 71, a core 75, a winding 76, a stabilized power source 72, and an amplifier 73.
This ground fault detection circuit operates as follows. First, the inverter device 5 converts the electric power rectified by the rectification unit 51 into electric power by the inverter unit 52 and drives the motor 6. If there is no ground fault at this time, the direct currents Ia and Ib from the rectifying unit 51 are equal. Therefore, the Hall element 71 does not detect anything and the output of the amplifier 73 is zero. That is, the zero phase current detector 7 does not operate. On the other hand, when a ground fault occurs, the circuit becomes a ground fault line 8 and the direct currents Ia and Ib are different. Then, the Hall element 71 detects a magnetic field generated in the core 75 and an output appears in the amplifier 73. The output of this zero-phase current detector activates a protection device (not shown).
JP 07-140191 (3rd page, FIG. 1)

ところが、従来の地絡検出回路は、零相電流検出器を用いるので、高価であり、また、スペースも大きくなるという問題があった。
本発明はこのような問題点に鑑みてなされたものであり、安価で省スペースの地絡検出回路提供することを目的とする。 However, since the conventional ground fault detection circuit uses a zero-phase current detector, there is a problem that it is expensive and also requires a large space.
The present invention has been made in view of such problems, and an object thereof is to provide an inexpensive and space-saving ground fault detection circuit.

上記問題を解決するため、本発明は、プリント基板に設けた電力供給用の配線パターンを有するインバータ装置の地絡検出回路において、前記プリント基板に設けた1対の平行なパターンと、前記パターンの近傍に設けたホールＩＣとを有し、前記平行なパターンに流れる往復電流によって発生する磁束を検知するものである。   In order to solve the above problem, the present invention provides a ground fault detection circuit for an inverter device having a power supply wiring pattern provided on a printed circuit board, and a pair of parallel patterns provided on the printed circuit board, It has a Hall IC provided in the vicinity, and detects a magnetic flux generated by a reciprocating current flowing in the parallel pattern.

請求項１に記載の発明によると、往復電流が流れる一対の平行配線パターンとその近傍にホールＩＣを設けたので、地絡を検出することができ、安価で省スペースの地絡検出回路を提供できる。   According to the first aspect of the present invention, since the Hall IC is provided in the vicinity of the pair of parallel wiring patterns through which the reciprocating current flows, a ground fault can be detected, and an inexpensive and space-saving ground fault detection circuit is provided. it can.

以下、本発明の実施の形態について図を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の実施例を示す地絡検出回路の側断面図である。図において、１はホールＩＣ、２１、２２は往復電流が流れる平行な配線パターンである。３１、３２は配線パターン２１，２２を流れる電流により発生する磁束、４はプリント基板である。
ホールＩＣ１は、図２に示すブロック図のように、ホール素子１１、安定化電源１２、増幅器１３およびシュミットトリガ１４からなる。
つぎに、動作について説明する。
地絡がない場合は、配線パターン２１，２２に流れる電流Ia、Ib（図４）の大きさは等しいので、それぞれの電流による磁束３１、３２の大きさも等しく、向きは反対になるので、二つの磁束が打ち消されるためホールＩＣ１周辺の磁束は小さい。いま、異常が発生して、配線パターン２１，２２に地絡電流が流れると、Ia、Ibの大きさは異なる。そうすると、磁束３１、３２の差が大きくなるので、ホールＩＣ１周辺の磁束は大きくなる。ホール素子１１は、この磁束を感知して増幅器１３およびシュミットトリガ１４に信号を送り出力を発生する。ホールＩＣの特性は、図３のようになるので、ホールＩＣ１の出力により地絡を検出できる。そして、このホールＩＣ１の出力は、従来と同じく図示しない保護装置を作動させる。
本発明が特許文献１と異なる部分は、零相電流検出器を平行な配線パターンとホールＩＣで構成したことである。 FIG. 1 is a side sectional view of a ground fault detection circuit showing an embodiment of the present invention. In the figure, 1 is a Hall IC, and 21 and 22 are parallel wiring patterns through which a reciprocating current flows. 31 and 32 are magnetic fluxes generated by the current flowing through the wiring patterns 21 and 22, and 4 is a printed circuit board.
The Hall IC 1 includes a Hall element 11, a stabilized power supply 12, an amplifier 13, and a Schmitt trigger 14, as shown in the block diagram of FIG.
Next, the operation will be described.
When there is no ground fault, the magnitudes of the currents Ia and Ib (FIG. 4) flowing in the wiring patterns 21 and 22 are the same. Since two magnetic fluxes are canceled out, the magnetic flux around the Hall IC 1 is small. If an abnormality occurs and a ground fault current flows through the wiring patterns 21 and 22, the magnitudes of Ia and Ib are different. As a result, the difference between the magnetic fluxes 31 and 32 is increased, so that the magnetic flux around the Hall IC 1 is increased. The Hall element 11 senses this magnetic flux and sends a signal to the amplifier 13 and the Schmitt trigger 14 to generate an output. Since the characteristics of the Hall IC are as shown in FIG. 3, a ground fault can be detected from the output of the Hall IC 1. The output of the Hall IC 1 activates a protective device (not shown) as in the conventional case.
The difference between the present invention and Patent Document 1 is that the zero-phase current detector is composed of parallel wiring patterns and Hall ICs.

本発明の実施例を示す地絡検出回路の側断面図Side sectional view of a ground fault detection circuit showing an embodiment of the present invention 本発明の地絡検出回路に用いたホールＩＣのブロック図Block diagram of Hall IC used in ground fault detection circuit of the present invention 本発明の地絡検出回路に用いたホールＩＣの特性図Characteristics diagram of Hall IC used in the ground fault detection circuit of the present invention 従来の地絡検出回路を用いたインバータ装置のブロック図Block diagram of an inverter device using a conventional ground fault detection circuit 図４の地絡検出回路を示すブロック図The block diagram which shows the ground fault detection circuit of FIG.

符号の説明Explanation of symbols

１ ホールＩＣ
１１、７１ ホール素子
１２、７２ 安定化電源
１３、７３ 増幅器
１４ シュミットトリガ
２１、２２ 配線パターン
３１、３２ 磁束
４ プリント基板
５ インバータ装置
５１ 整流部
５２ インバータ部
６ モータ
７ 零相電流検出器
７５ コア
７６ 巻線
８ 地絡線 1 Hall IC
11, 71 Hall elements 12, 72 Stabilized power supply 13, 73 Amplifier 14 Schmitt trigger 21, 22 Wiring pattern 31, 32 Magnetic flux 4 Printed circuit board 5 Inverter device 51 Rectifier 52 Inverter 6 Motor 7 Zero-phase current detector 75 Core 76 Winding 8 Ground fault wire

Claims (2)

プリント基板に設けた電力供給用の配線パターンを有するインバータ装置の地絡検出回路において、
前記プリント基板に設けた1対の平行なパターンと、前記配線パターンの近傍に設けたホールＩＣとを有し、前記平行なパターンに流れる往復電流によって発生する磁束を検知することを特徴とするインバータ装置の地絡検出回路。 In the ground fault detection circuit of the inverter device having the wiring pattern for power supply provided on the printed circuit board,
An inverter having a pair of parallel patterns provided on the printed circuit board and a Hall IC provided in the vicinity of the wiring pattern, and detecting a magnetic flux generated by a reciprocating current flowing in the parallel pattern Equipment ground fault detection circuit. 前記ホールＩＣは、ホール素子、安定化電源、増幅器およびシュミットトリガの回路からなることを特徴とする請求項１記載のインバータ装置の地絡検出回路。   2. The ground fault detection circuit for an inverter device according to claim 1, wherein the Hall IC is composed of a Hall element, a stabilized power source, an amplifier, and a Schmitt trigger circuit.
JP2004360729A 2004-12-14 2004-12-14 Grounding detection circuitry of inverter device Pending JP2006170677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004360729A JP2006170677A (en) 2004-12-14 2004-12-14 Grounding detection circuitry of inverter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004360729A JP2006170677A (en) 2004-12-14 2004-12-14 Grounding detection circuitry of inverter device

Publications (1)

Publication Number Publication Date
JP2006170677A true JP2006170677A (en) 2006-06-29

Family

ID=36671607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004360729A Pending JP2006170677A (en) 2004-12-14 2004-12-14 Grounding detection circuitry of inverter device

Country Status (1)

Country Link
JP (1) JP2006170677A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529945A (en) * 2014-10-15 2016-04-27 Ls产电株式会社 Single-phase photovoltaic inverter
EP3407483A4 (en) * 2016-01-18 2020-03-11 Hitachi Automotive Systems, Ltd. Direct current sensor, alternating current sensor, and inverter comprising same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529945A (en) * 2014-10-15 2016-04-27 Ls产电株式会社 Single-phase photovoltaic inverter
JP2016082873A (en) * 2014-10-15 2016-05-16 エルエス産電株式会社Lsis Co., Ltd. Single-phase solar light inverter
US9866142B2 (en) 2014-10-15 2018-01-09 Lsis Co., Ltd. Single-phase photovoltaic inverter
CN105529945B (en) * 2014-10-15 2018-05-29 Ls产电株式会社 single-phase photovoltaic inverter
EP3407483A4 (en) * 2016-01-18 2020-03-11 Hitachi Automotive Systems, Ltd. Direct current sensor, alternating current sensor, and inverter comprising same

Similar Documents

Publication Publication Date Title
US8649130B2 (en) Motor driving apparatus having fault diagnostic function
US8433528B2 (en) Ground fault detection system and method
JP2010014478A (en) Leakage detector
JP2007078416A (en) Current sensor and current sensing method
JP4983523B2 (en) Power supply circuit and earth leakage circuit breaker using the power supply circuit
JP4935455B2 (en) Earth leakage detector
CN1319239C (en) Overload current protection device using magnetic impedance element
JP2008128915A (en) Amperometric device and semiconductor module equipped with amperometric function
JP2008186592A (en) Circuit breaker
JP2006170677A (en) Grounding detection circuitry of inverter device
JP2011185883A (en) Current detector
JP2007155399A (en) Current sensor and current value calculation system having the same
JP5943371B2 (en) Inverter power supply
JP4768962B2 (en) Multiphase current detector
JP2006339090A (en) Ground fault interrupter
JP6542336B2 (en) Magnetic shield device, ground fault detection device and magnetic shield method
JP5272678B2 (en) Overexcitation detection device
JP4623560B2 (en) Earth leakage breaker
KR101724645B1 (en) Integrated circuit for leakage current detection and earth leakage circuit breaker
JP5148261B2 (en) DC power supply
JP2004135392A (en) Three-phase power supply phase interruption detecting apparatus
CN110221112A (en) Circuit board and power electronic equipment
JP2007252170A (en) Motor drive device
JP2005049185A (en) Shield structure of current sensor
JP2002005963A (en) Clamp type electrical excitation checking device