JPS5523778A - Protection of controlled rectifier - Google Patents
Protection of controlled rectifierInfo
- Publication number
- JPS5523778A JPS5523778A JP9677878A JP9677878A JPS5523778A JP S5523778 A JPS5523778 A JP S5523778A JP 9677878 A JP9677878 A JP 9677878A JP 9677878 A JP9677878 A JP 9677878A JP S5523778 A JPS5523778 A JP S5523778A
- Authority
- JP
- Japan
- Prior art keywords
- controlled rectifier
- failure
- commutation
- rectifier unit
- 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.)
- Granted
Links
Landscapes
- Rectifiers (AREA)
- Inverter Devices (AREA)
Abstract
PURPOSE: To smoothly correct the failure in commutation and resume operation, by adding a failure-time turn-on angle setting circuit, an analogue switch and a simple electronic circuit such as a turn-on advancement priority circuit to a conventional system for protection against the failure in cimmutation.
CONSTITUTION: In a main circuit, the DC output voltage of a controlled rectifier unit 3-1 is zero and that of another controlled rectifier unit 3-2 is positive. Since a load current flows through the controlled rectifier unit 3-2 and load 4 and is going to flow from the rectifier unit 3-2 to the other 3-1, the current of the unit 3-1 decreases sharply. The failure in commutation takes place when a commutation margin angle γ=180°-α-u falls below a predetermined value. Since the current flowing through controlled rectifier elements decreases in the commutation overlap angle u, the failure in commutation can be smoothly corrected by reducing the current of the controlled rectifier unit 3-1.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53096778A JPS5943914B2 (en) | 1978-08-09 | 1978-08-09 | Protection method of controlled rectifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53096778A JPS5943914B2 (en) | 1978-08-09 | 1978-08-09 | Protection method of controlled rectifier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5523778A true JPS5523778A (en) | 1980-02-20 |
JPS5943914B2 JPS5943914B2 (en) | 1984-10-25 |
Family
ID=14174085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53096778A Expired JPS5943914B2 (en) | 1978-08-09 | 1978-08-09 | Protection method of controlled rectifier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5943914B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58120541A (en) * | 1981-12-24 | 1983-07-18 | ピ−ピ−ジ−・インダストリ−ズ・インコ−ポレ−テツド | Aqueous sizing agent composition for glass fiber and sizing agent treated glass fiber for thermoplastic reinforcing material |
JPS58120542A (en) * | 1981-12-24 | 1983-07-18 | ピ−ピ−ジ−・インダストリ−ズ・インコ−ポレ−テツド | Aqueous sizing agent composition and glass fiber for thermocuring polymer reinforcing material prepared by using said composition |
US4969765A (en) * | 1984-12-29 | 1990-11-13 | Ogawa Chemical Industries Ltd. | Mechanical marking pen |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01157306U (en) * | 1988-04-19 | 1989-10-30 | ||
JPH04314008A (en) * | 1991-04-12 | 1992-11-05 | Fujikura Ltd | Optical fiber cable and multiple integrated connector for the same |
JPH0664213U (en) * | 1993-02-17 | 1994-09-09 | 日本電信電話株式会社 | Optical connector ferrule |
-
1978
- 1978-08-09 JP JP53096778A patent/JPS5943914B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58120541A (en) * | 1981-12-24 | 1983-07-18 | ピ−ピ−ジ−・インダストリ−ズ・インコ−ポレ−テツド | Aqueous sizing agent composition for glass fiber and sizing agent treated glass fiber for thermoplastic reinforcing material |
JPS58120542A (en) * | 1981-12-24 | 1983-07-18 | ピ−ピ−ジ−・インダストリ−ズ・インコ−ポレ−テツド | Aqueous sizing agent composition and glass fiber for thermocuring polymer reinforcing material prepared by using said composition |
JPS6227015B2 (en) * | 1981-12-24 | 1987-06-11 | Ppg Industries Inc | |
JPS6257586B2 (en) * | 1981-12-24 | 1987-12-01 | Ppg Industries Inc | |
US4969765A (en) * | 1984-12-29 | 1990-11-13 | Ogawa Chemical Industries Ltd. | Mechanical marking pen |
Also Published As
Publication number | Publication date |
---|---|
JPS5943914B2 (en) | 1984-10-25 |
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