JPH099660A - Inverter - Google Patents
InverterInfo
- Publication number
- JPH099660A JPH099660A JP7154330A JP15433095A JPH099660A JP H099660 A JPH099660 A JP H099660A JP 7154330 A JP7154330 A JP 7154330A JP 15433095 A JP15433095 A JP 15433095A JP H099660 A JPH099660 A JP H099660A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- regenerative resistor
- short
- regenerative
- switching element
- 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.)
- Granted
Links
Landscapes
- Stopping Of Electric Motors (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は誘導電動機の可変速に用
いられるインバータ装置において、回生用のスイッチン
グ素子に短絡故障が生じても回生抵抗が焼損しないよう
に保護する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device used for a variable speed of an induction motor, which protects a regenerative resistor from being burned out even if a short circuit failure occurs in a regenerative switching element.
【０００２】[0002]
【従来の技術】一般に汎用のインバータでは、回生時に
電動機より返流されるエネルギーを吸収するために回生
抵抗を備え、この回生抵抗へ電流を流すスイッチング素
子としてＭＯＳ−ＦＥＴやＩＧＢＴなどが用いられる。
ここで、このスイッチング素子が何らかの理由で短絡故
障した場合には、回生抵抗に異常な発熱を招き、最悪の
場合回生抵抗が焼損してしまうと同時に周辺の部品へも
二次的な損傷をおよぼす恐れがあった。2. Description of the Related Art Generally, a general-purpose inverter is provided with a regenerative resistor for absorbing energy returned from a motor during regeneration, and a MOS-FET, an IGBT or the like is used as a switching element for supplying a current to the regenerative resistor.
Here, if this switching element fails due to a short circuit for some reason, abnormal heat will be generated in the regenerative resistor, and in the worst case, the regenerative resistor will burn out and at the same time cause secondary damage to surrounding parts. I was afraid.
【０００３】従来、これを防ぐ手段としてたとえば回生
抵抗と直列に温度ヒューズなどを取り付けて、スイッチ
ング素子の短絡故障時には温度ヒューズが切れることで
回生抵抗への電流を遮断するといった方法が取られてい
た。Conventionally, as a means for preventing this, for example, a temperature fuse or the like is attached in series with the regenerative resistor and the current to the regenerative resistor is cut off when the switching element is short-circuited and the temperature fuse is blown. .
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記従来
の構成では、温度ヒューズと回生抵抗の温度が上昇する
速さのマッチングによっては、温度ヒューズの動作が間
に合わず保護手段が機能する前に回生抵抗が焼損に至っ
てしまうという問題点を有していた。However, in the above-mentioned conventional configuration, depending on the matching of the speed at which the temperature of the thermal fuse and the temperature of the regenerative resistor rise, the regenerative resistor may not be able to operate in time and the regenerative resistor may not operate in time. It had a problem that it was burnt out.
【０００５】本発明は上記従来の問題点を解決するもの
で、確実な回生抵抗の保護手段を有するインバータ装置
を提供することを目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an inverter device having a reliable protection means for regenerative resistance.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
に本発明のインバータ装置は、回生抵抗の両端の電圧を
監視することで回生抵抗に電流が流れる時間を検出し、
この時間があらかじめ決められた期間以上であると、ス
イッチング素子の短絡であると認識する短絡検出回路
と、短絡検出回路からの信号を受けて回生抵抗への電流
を遮断する電流遮断器から構成された回生抵抗保護手段
を有している。In order to achieve this object, the inverter device of the present invention detects the time when a current flows through the regenerative resistor by monitoring the voltage across the regenerative resistor,
If this time is longer than a predetermined period, it consists of a short-circuit detection circuit that recognizes that a switching element is short-circuited, and a current circuit breaker that receives a signal from the short-circuit detection circuit and shuts off the current to the regenerative resistor. It has a regenerative resistance protection means.
【０００７】[0007]
【作用】この構成によって、回生抵抗が焼損する前に確
実に保護できるインバータ装置を提供することができ
る。With this configuration, it is possible to provide an inverter device that can reliably protect the regenerative resistor before it burns out.
【０００８】[0008]
（実施例１）以下本発明の第１の実施例について、図面
を参照しながら説明する。(First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings.
【０００９】図１は本発明の第１の実施例におけるイン
バータ装置のブロック図である。図１において、１はコ
ンバータ部でブリッジ接続されたダイオード９と平滑用
電解コンデンサ１０から構成される。２はインバータ
部、３は回生抵抗、４は回生抵抗へ流れる電流をオン・
オフされるスイッチング素子で通常ＭＯＳ−ＦＥＴやＩ
ＧＢＴなどが用いられる。また、スイッチング素子４の
オン時間Ｔｏｎとオフ時間Ｔｏｆｆはあらかじめ所定の
値に設定されているものとする。５は電圧監視回路、６
は短絡検出回路、７は電流遮断器で接点はノーマル・ク
ローズとする。８は誘導電動機である。FIG. 1 is a block diagram of an inverter device according to a first embodiment of the present invention. In FIG. 1, 1 is composed of a diode 9 and a smoothing electrolytic capacitor 10 which are bridge-connected in the converter section. 2 is an inverter unit, 3 is a regenerative resistor, 4 is a current flowing to the regenerative resistor
A switching element that is turned off, which is usually a MOS-FET or I
GBT or the like is used. Further, it is assumed that the on time Ton and the off time Toff of the switching element 4 are set to predetermined values in advance. 5 is a voltage monitoring circuit, 6
Is a short circuit detection circuit, 7 is a current breaker, and contacts are normally closed. 8 is an induction motor.
【００１０】電圧監視回路５は、回生抵抗の両端の電位
差を監視し、電位差が生じた場合この期間Ｔｓの間信号
を出力する。電圧監視回路５からの信号を受けて、短絡
検出回路６はＴｓとスイッチング素子４の所定のオン時
間Ｔｏｎを比較し、ＴｓがＴｏｎより長ければスイッチ
ング素子４の短絡故障であると判断し短絡検出信号を出
力する。短絡検出信号を受けて電流遮断器７は接点をオ
ープンにし回生抵抗３への電流を遮断する。The voltage monitoring circuit 5 monitors the potential difference between both ends of the regenerative resistor and outputs a signal during this period Ts when the potential difference occurs. In response to the signal from the voltage monitoring circuit 5, the short circuit detection circuit 6 compares Ts with a predetermined on time Ton of the switching element 4, and if Ts is longer than Ton, it is determined that the switching element 4 has a short circuit fault and short circuit detection is performed. Output a signal. In response to the short circuit detection signal, the current breaker 7 opens the contact and cuts off the current to the regenerative resistor 3.
【００１１】（実施例２）以下本発明の第２の実施例に
ついて、図面を参照しながら説明する。(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.
【００１２】図２は本発明の第２の実施例におけるイン
バータ装置のブロック図である。図１との違いは、電流
遮断器７の替わりに電源とコンバータ部１の間に電磁接
触器１１を用いたところにある。電磁接触器１１によ
り、インバータ装置全体への電流の供給を遮断すること
ができる。FIG. 2 is a block diagram of an inverter device according to the second embodiment of the present invention. The difference from FIG. 1 is that an electromagnetic contactor 11 is used between the power source and the converter unit 1 instead of the current breaker 7. The electromagnetic contactor 11 can interrupt the supply of current to the entire inverter device.
【００１３】（実施例３）以下本発明の第３の実施例に
ついて、図面を参照しながら説明する。(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings.
【００１４】図３は本発明の第３の実施例におけるイン
バータ装置のブロック図である。図１との違いは、電流
遮断器７を直流中間回路上の、インバータ部２と回生抵
抗３の接続点と、コンバータ部１の間に配設した点であ
る。電流遮断器７によって、回生抵抗３とインバータ部
２への電流の供給を同時に遮断することができる。FIG. 3 is a block diagram of an inverter device according to a third embodiment of the present invention. The difference from FIG. 1 is that the current breaker 7 is arranged on the DC intermediate circuit between the connection point of the inverter section 2 and the regenerative resistor 3 and the converter section 1. The current breaker 7 can simultaneously interrupt the supply of current to the regenerative resistor 3 and the inverter unit 2.
【００１５】[0015]
【発明の効果】以上のように本発明は、回生抵抗へ電流
を流すスイッチング素子の所定のオン時間と、抵抗の両
端の電位差を検出して得られる実際に回生抵抗に電流が
流れている時間とを比較することによって、スイッチン
グ素子の短絡故障を検知し、回生抵抗あるいはインバー
タ装置全体への電流の供給を遮断することで、回生抵抗
の焼損を確実に防止できるインバータ装置を構成するこ
とができる。As described above, according to the present invention, the predetermined ON time of the switching element for flowing the current to the regenerative resistor and the time when the current actually flows in the regenerative resistor obtained by detecting the potential difference between both ends of the resistor. By comparing with, the short circuit failure of the switching element is detected, and the supply of the current to the regenerative resistor or the entire inverter device is cut off, so that the inverter device capable of reliably preventing the regenerative resistor from being burned can be configured. .
【図１】本発明の第１の実施例におけるインバータ装置
のブロック図FIG. 1 is a block diagram of an inverter device according to a first embodiment of the present invention.
【図２】本発明の第２の実施例におけるインバータ装置
のブロック図FIG. 2 is a block diagram of an inverter device according to a second embodiment of the present invention.
【図３】本発明の第３の実施例におけるインバータ装置
のブロック図FIG. 3 is a block diagram of an inverter device according to a third embodiment of the present invention.
１ コンバータ部 ２ インバータ部 ３ 回生抵抗 ４ スイッチング素子 ５ 電圧監視回路 ６ 短絡検出回路 ７ 電流遮断器 ８ 誘導電動機 ９ ブリッジ・ダイオード １０ 平滑用電解コンデンサ １１ 電磁接触器 1 Converter part 2 Inverter part 3 Regenerative resistor 4 Switching element 5 Voltage monitoring circuit 6 Short circuit detection circuit 7 Current breaker 8 Induction motor 9 Bridge diode 10 Smoothing electrolytic capacitor 11 Electromagnetic contactor
Claims (3)
ルス幅変調された制御信号にもとづき直流を再び交流に
変換するインバータ部と、直流中間回路に設けられた回
生エネルギー吸収用の回収抵抗と、コンバータ部の電圧
に応じて、あらかじめ決められたオン時間Ｔｏｎおよび
オフ時間Ｔｏｆｆにしたがって回生抵抗に電流を流すス
イッチング素子とをそなえ、回生抵抗の両端の電位差を
監視し電位差の生じている期間Ｔｓだけ信号を出力する
電圧監視回路と、ＴｓとＴｏｎとを比較し、Ｔｓの方が
長い場合には前記スイッチング素子の短絡故障であると
判断し短絡検出信号を出力する短絡検出回路と、回生抵
抗と直列に接続され短絡検出回路からの信号を受けて回
生抵抗への電流を遮断する電流遮断器から構成される回
生抵抗保護手段を有するインバータ装置。1. A converter section for exchanging AC to DC, an inverter section for converting DC to AC again based on a pulse-width-modulated control signal, and a recovery resistor for absorbing regenerative energy provided in a DC intermediate circuit. , A switching element that causes a current to flow through the regenerative resistor according to a predetermined on-time Ton and off-time Toff according to the voltage of the converter section, and monitors the potential difference between both ends of the regenerative resistor to detect the period Ts during which the potential difference occurs. A voltage monitoring circuit that outputs a signal only, Ts and Ton are compared, and if Ts is longer, a short circuit detection circuit that determines that the switching element has a short circuit fault and outputs a short circuit detection signal, and a regenerative resistor A regenerative resistance protection device that is connected in series with Inverter device to be.
替わりに、電源とコンバータ部の間に短絡検出回路から
の信号を受けてコンバータ部への電源の供給を遮断する
電磁接触器を有する請求項１記載のインバータ装置。2. An electromagnetic contactor for receiving a signal from a short-circuit detection circuit between the power source and the converter section to interrupt the supply of power to the converter section instead of the current breaker connected in series to the regenerative resistor. The inverter device according to claim 1, which has.
続点と、コンバータ部との間に配設された請求項１記載
のインバータ装置。3. The inverter device according to claim 1, wherein the current breaker is arranged between a connection point between the inverter section and the regenerative resistor and the converter section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15433095A JP3473188B2 (en) | 1995-06-21 | 1995-06-21 | Inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15433095A JP3473188B2 (en) | 1995-06-21 | 1995-06-21 | Inverter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH099660A true JPH099660A (en) | 1997-01-10 |
| JP3473188B2 JP3473188B2 (en) | 2003-12-02 |
Family
ID=15581796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15433095A Expired - Fee Related JP3473188B2 (en) | 1995-06-21 | 1995-06-21 | Inverter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3473188B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002064901A (en) * | 2000-08-21 | 2002-02-28 | Toshiba Corp | Electric car controller |
| EP1847839A2 (en) * | 2006-04-21 | 2007-10-24 | Alstom Transport S.A. | Method of screening a resistive short-circuit, system, module and recording medium for this method |
| JP2009136103A (en) * | 2007-11-30 | 2009-06-18 | Oriental Motor Co Ltd | Regenerative resistor protection device |
| JP2009136102A (en) * | 2007-11-30 | 2009-06-18 | Oriental Motor Co Ltd | Regenerative resistor protection device |
| CN101804933A (en) * | 2005-04-11 | 2010-08-18 | 富士达株式会社 | Elevating machine control apparatus |
| JP2017178473A (en) * | 2016-03-28 | 2017-10-05 | 住友重機械工業株式会社 | Lifting magnet device |
-
1995
- 1995-06-21 JP JP15433095A patent/JP3473188B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002064901A (en) * | 2000-08-21 | 2002-02-28 | Toshiba Corp | Electric car controller |
| CN101804933A (en) * | 2005-04-11 | 2010-08-18 | 富士达株式会社 | Elevating machine control apparatus |
| EP1847839A2 (en) * | 2006-04-21 | 2007-10-24 | Alstom Transport S.A. | Method of screening a resistive short-circuit, system, module and recording medium for this method |
| FR2900241A1 (en) * | 2006-04-21 | 2007-10-26 | Alstom Transport Sa | METHOD FOR SCREENING A RESISTIVE SHORT CIRCUIT, SYSTEM, MODULE, AND RECORDING MEDIUM FOR THIS METHOD |
| EP1847839A3 (en) * | 2006-04-21 | 2011-03-09 | ALSTOM Transport SA | Method of screening a resistive short-circuit, system, module and recording medium for this method |
| AU2007201678B2 (en) * | 2006-04-21 | 2011-07-07 | Alstom Transport Technologies | Method for tracing a resistive short-circuit , system, module and recording medium for this method |
| JP2009136103A (en) * | 2007-11-30 | 2009-06-18 | Oriental Motor Co Ltd | Regenerative resistor protection device |
| JP2009136102A (en) * | 2007-11-30 | 2009-06-18 | Oriental Motor Co Ltd | Regenerative resistor protection device |
| JP2017178473A (en) * | 2016-03-28 | 2017-10-05 | 住友重機械工業株式会社 | Lifting magnet device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3473188B2 (en) | 2003-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |