JPH0488391U - - Google Patents
Info
- Publication number
- JPH0488391U JPH0488391U JP13065990U JP13065990U JPH0488391U JP H0488391 U JPH0488391 U JP H0488391U JP 13065990 U JP13065990 U JP 13065990U JP 13065990 U JP13065990 U JP 13065990U JP H0488391 U JPH0488391 U JP H0488391U
- Authority
- JP
- Japan
- Prior art keywords
- thyristor element
- separately excited
- resistance value
- power failure
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 230000001052 transient effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Stopping Of Electric Motors (AREA)
Description
第１図は本考案の実施例を示すブロツク回路図
、第２図は同回路の動作説明用のタイムチヤート
、第３図は同回路の他励インバータのゲート信号
説明用のタイムチヤート、第４図は従来のインバ
ータのブロツク回路図である。
１，１５……トランス、２……電流型インバー
タ、３……誘導電動機、４……過電圧防止回路、
５……整流器、６……直流コンデンサ、７，８，
９……抵抗、１０……直流リアクトル、１１，１
４……ヒユーズ、１２……他励インバータ。
Fig. 1 is a block circuit diagram showing an embodiment of the present invention, Fig. 2 is a time chart for explaining the operation of the same circuit, Fig. 3 is a time chart for explaining the gate signal of the separately excited inverter in the same circuit, and Fig. 4 is a time chart for explaining the gate signal of the separately excited inverter in the same circuit. The figure is a block circuit diagram of a conventional inverter. 1, 15...Transformer, 2...Current type inverter, 3...Induction motor, 4...Overvoltage prevention circuit,
5... Rectifier, 6... DC capacitor, 7, 8,
9...Resistance, 10...DC reactor, 11,1
4...fuse, 12...separately excited inverter.
Claims (1)
直流リアクトルを直列に介して接続されたサイリ
スタ素子を用いた他励インバータ装置において、 前記直列抵抗の抵抗値を前記サイリスタ素子が
転流失敗したとき電流が該サイリスタ素子の電流
破損しない過渡時の耐量となしうるように大きく
選定すると共に、停電を検出して前記サイリスタ
素子のゲートのすべてを所定時間又は停電の期間
オンさせるゲート制御回路を設けたことを特徴と
する他励インバータの素子保護回路。[Claims for Utility Model Registration] In a separately excited inverter device using a thyristor element connected in series with a series resistor and a DC reactor to a rectifier circuit equipped with a DC capacitor, the resistance value of the series resistor is defined as the resistance value of the thyristor element. When the commutation fails, the current is selected to be large enough to withstand a transient period without damaging the current of the thyristor element, and a power failure is detected and all gates of the thyristor element are turned on for a predetermined time or during the power failure. An element protection circuit for a separately excited inverter characterized by being provided with a gate control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13065990U JPH0488391U (en) | 1990-11-30 | 1990-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13065990U JPH0488391U (en) | 1990-11-30 | 1990-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0488391U true JPH0488391U (en) | 1992-07-31 |
Family
ID=31877980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13065990U Pending JPH0488391U (en) | 1990-11-30 | 1990-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0488391U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838072A (en) * | 1981-08-31 | 1983-03-05 | Fujitsu Ltd | Variable density picture compression system |
| JPS58112477A (en) * | 1981-12-24 | 1983-07-04 | Toshiba Corp | Separately-excited inverter device |
| JPS61244276A (en) * | 1985-04-23 | 1986-10-30 | Hitachi Ltd | Control device for power converter |
-
1990
- 1990-11-30 JP JP13065990U patent/JPH0488391U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838072A (en) * | 1981-08-31 | 1983-03-05 | Fujitsu Ltd | Variable density picture compression system |
| JPS58112477A (en) * | 1981-12-24 | 1983-07-04 | Toshiba Corp | Separately-excited inverter device |
| JPS61244276A (en) * | 1985-04-23 | 1986-10-30 | Hitachi Ltd | Control device for power converter |
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