JPH11299257A - Inverter device - Google Patents
Inverter deviceInfo
- Publication number
- JPH11299257A JPH11299257A JP10114396A JP11439698A JPH11299257A JP H11299257 A JPH11299257 A JP H11299257A JP 10114396 A JP10114396 A JP 10114396A JP 11439698 A JP11439698 A JP 11439698A JP H11299257 A JPH11299257 A JP H11299257A
- Authority
- JP
- Japan
- Prior art keywords
- shunt
- switching element
- potential difference
- difference amplifier
- current
- 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
Links
Landscapes
- Inverter Devices (AREA)
- Power Conversion In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、変流器を使用する
ことなく電流の検出を可能にするインバータ装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device capable of detecting a current without using a current transformer.
【０００２】[0002]
【従来の技術】従来のインバータ装置では、変流器を使
用して電流の検出を行うのが一般的であった。2. Description of the Related Art In a conventional inverter device, current detection is generally performed using a current transformer.
【０００３】[0003]
【発明が解決しようとする課題】そのため、スイッチン
グ素子に過電流、またはアーム短絡電流が流れても、そ
れを検出できず、スイッチング素子を破壊してしまう
か、または、高価で煩雑なＣＴ回路を付加しなければな
らなかった。Therefore, even if an overcurrent or an arm short-circuit current flows in the switching element, it cannot be detected, and the switching element is destroyed or an expensive and complicated CT circuit is required. Had to add.
【０００４】[0004]
【課題を解決するための手段】その目的を達成するた
め、直流電圧電源の両端に直列に接続される逆並列ダイ
オードを備えた第１のスイッチング素子と第２のスイッ
チング素子を有するインバータ装置において、第１のス
イッチング素子と第２のスイッチング素子の間に接続し
た第１の分流器、第１の分流器と第１のスイッチング素
子の接続点とインバータ装置の出力端子との間に接続し
た第２の分流器、第１の分流器の出力電圧を増幅する第
１の電位差増幅器、第２の分流器の出力電圧を増幅する
第２の電位差増幅器を備えて構成する。In order to achieve the object, an inverter apparatus having a first switching element and a second switching element having antiparallel diodes connected in series to both ends of a DC voltage power supply, A first shunt connected between the first switching element and the second switching element; a second shunt connected between a connection point between the first shunt and the first switching element and an output terminal of the inverter device. , A first potential difference amplifier for amplifying the output voltage of the first shunt, and a second potential difference amplifier for amplifying the output voltage of the second shunt.
【０００５】さらに、第１の分流器と前記第２の分流器
の接続点を前記第１の電位差増幅器及び前記第２の電位
差増幅器の共通アースに接続する構成とする。Further, a connection point between the first current divider and the second current divider is connected to a common ground of the first potential difference amplifier and the second potential difference amplifier.
【０００６】[0006]
【発明の実態の形態】以下、本発明の実施の形態を図１
を参照して説明する。 （１）逆並列ダイオードを備えた第１のスイッチング素
子２１および第２ののスイッチング素子２２の間に直列
に第１の分流器３１を接続する。 （２）第１の分流器３１の端子の一端と出力端子との間
に第２の分流器３２を接続する。 （３）第１の分流器３１の出力電圧を増幅する第１の電
位差増幅器（図示せず）及び第２の分流器３２の出力電
圧を増幅する第２の電位差増幅器（図示せず）を設け、
第１の電位差増幅器及び第２の電位差増幅器の共通アー
スを第１及び第２の分流器の接続点３３に接続する。本
発明は、以上の構成よりなっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. (1) A first shunt 31 is connected in series between a first switching element 21 and a second switching element 22 having an anti-parallel diode. (2) The second current divider 32 is connected between one end of the terminal of the first current divider 31 and the output terminal. (3) A first potential difference amplifier (not shown) for amplifying the output voltage of the first current divider 31 and a second potential difference amplifier (not shown) for amplifying the output voltage of the second current divider 32 are provided. ,
The common ground of the first and second potentiometers is connected to the junction 33 of the first and second shunts. The present invention has the above configuration.
【０００７】このように構成することによって、第２の
分流器により出力電流および出力過電流を検出すること
ができ、第１の分流器により第２のスイッチング素子自
身の電流を検出できる。さらに、第１のスイッチング素
子２１の電流も第１の分流器３１の出力電圧と第２の分
流器３２の出力電圧の差として検出できる。また、アー
ム短絡電流は第１の分流器により検出できる。このよう
に、第１のスイッチング素子２１のエミッタ部分と電位
差増幅器のグランド３３が接続されているために、第１
のスイッチング素子２１のゲート電圧を分流器の抵抗分
だけ大きくする必要はない。また、第２のスイッチング
素子２２については、特にゲート電圧について考慮する
必要はない。さらに、第２の分流器３２の正負および値
と、第１の分流器３１の正負および値により、電流が過
大となる前にアーム短絡電流かどうかを判別できる。す
なわち、電位差増幅器のグランド３３を前記のようにと
った場合、すなわち、第２の分流器３２の値が負で第１
の分流器３１の値が負であればアーム短絡、第２の分流
器３２の値が負で第１の分流器３１の値の方が大きい時
アーム短絡と判別することができるという特徴を有す
る。なお、スイッチング素子としてはＩＧＢＴ、ＧＴＯ
サイリスタ、ＳＩサイリスタ等いずれの素子にも適用で
きることは言うまでもない。With this configuration, the output current and the output overcurrent can be detected by the second shunt, and the current of the second switching element itself can be detected by the first shunt. Furthermore, the current of the first switching element 21 can also be detected as the difference between the output voltage of the first shunt 31 and the output voltage of the second shunt 32. Further, the arm short-circuit current can be detected by the first shunt. As described above, since the emitter portion of the first switching element 21 is connected to the ground 33 of the potential difference amplifier,
It is not necessary to increase the gate voltage of the switching element 21 by the resistance of the shunt. Further, regarding the second switching element 22, there is no need to particularly consider the gate voltage. Further, it is possible to determine whether the current is an arm short-circuit current before the current becomes excessive, based on the sign and value of the second current divider 32 and the sign and value of the first current divider 31. That is, when the ground 33 of the potential difference amplifier is taken as described above, that is, when the value of the second
When the value of the current shunt 31 is negative, it is possible to determine that the arm is short-circuited. When the value of the second current shunt 32 is negative and the value of the first current shunt 31 is larger, the arm is short-circuited. . Note that the switching elements are IGBT, GTO
It goes without saying that the present invention can be applied to any device such as a thyristor and an SI thyristor.
【０００８】[0008]
【発明の効果】本発明を使用することによって、安価な
構成により出力電流および出力過電流を第２の分流器で
検出でき、またアーム短絡電流を第１の分流器で検出で
きるのでアーム短絡保護信号を出力することができる。
また、第１のスイッチング素子に流れる電流も二つの分
流器の差として検出することができる。By using the present invention, the output current and the output overcurrent can be detected by the second shunt with an inexpensive configuration, and the arm short-circuit current can be detected by the first shunt, so that the arm short-circuit protection is provided. A signal can be output.
Also, the current flowing through the first switching element can be detected as a difference between the two shunts.
【図１】本発明のインバータ装置を構成する回路図を示
す。FIG. 1 shows a circuit diagram of an inverter device according to the present invention.
１ 直流電圧電源 ２１ 第１のスイッチング素子 ２２ 第２のスイッチング素子 ３１ 第１の分流器 ３２ 第２の分流器 ３３ 分流器接続点 ４ 単位インバータ Reference Signs List 1 DC voltage power supply 21 First switching element 22 Second switching element 31 First shunt 32 Second shunt 33 Shunt node 4 Unit inverter
Claims (2)
逆並列ダイオードを備えた第１のスイッチング素子と第
２のスイッチング素子を有するインバータ装置におい
て、前記第１のスイッチング素子と前記第２のスイッチ
ング素子の間に接続した第１の分流器、該第１の分流器
と第１のスイッチング素子との接続点とインバータ装置
の出力端子との間に接続した第２の分流器、前記第１の
分流器の出力電圧を増幅する第１の電位差増幅器、前記
第２の分流器の出力電圧を増幅する第２の電位差増幅器
を備えたことを特徴とするインバータ装置。1. An inverter device having a first switching element and a second switching element having an anti-parallel diode connected in series to both ends of a DC voltage power supply, wherein the first switching element and the second switching element are connected to each other. A first shunt connected between the switching elements, a second shunt connected between a connection point between the first shunt and the first switching element and an output terminal of the inverter device, An inverter device comprising: a first potential difference amplifier for amplifying an output voltage of the current shunt; and a second potential difference amplifier for amplifying an output voltage of the second shunt.
接続点を第１の電位差増幅器及び前記第２の電位差増幅
器の共通アースに接続する構成としたことを特徴とする
前記請求項１記載のインバータ装置。2. The apparatus according to claim 1, wherein a connection point between the first current divider and the second current divider is connected to a common ground of the first potential difference amplifier and the second potential difference amplifier. Item 3. The inverter device according to Item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10114396A JPH11299257A (en) | 1998-04-10 | 1998-04-10 | Inverter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10114396A JPH11299257A (en) | 1998-04-10 | 1998-04-10 | Inverter device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11299257A true JPH11299257A (en) | 1999-10-29 |
| JPH11299257A5 JPH11299257A5 (en) | 2005-07-14 |
Family
ID=14636640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10114396A Pending JPH11299257A (en) | 1998-04-10 | 1998-04-10 | Inverter device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11299257A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148494A (en) * | 2010-02-10 | 2011-08-10 | 艾默生网络能源系统北美公司 | Bridge arm conduction protection circuit and rectification circuit |
-
1998
- 1998-04-10 JP JP10114396A patent/JPH11299257A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148494A (en) * | 2010-02-10 | 2011-08-10 | 艾默生网络能源系统北美公司 | Bridge arm conduction protection circuit and rectification circuit |
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