JPS5443525A - Chopper device for controlling dc power - Google Patents
Chopper device for controlling dc powerInfo
- Publication number
- JPS5443525A JPS5443525A JP11079077A JP11079077A JPS5443525A JP S5443525 A JPS5443525 A JP S5443525A JP 11079077 A JP11079077 A JP 11079077A JP 11079077 A JP11079077 A JP 11079077A JP S5443525 A JPS5443525 A JP S5443525A
- Authority
- JP
- Japan
- Prior art keywords
- main switch
- contactor
- turned
- main
- contact
- 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
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To suppress a generation of arc when in a contactor turned off, by such means that when turning off the contactor, a thyristor main switch in chopper circuit be turned on to commutate a current in the contactor to the main switch, with an operation returned to a DC power control by the chopper circuit.
CONSTITUTION: When a contactor MS is turned off from an energized condition, opening operation of main contact MS, of a contactor MS will be firstly started by an opening of contact AC2. With a condition established for an AND gate G1, a main switch SM is turned on. A load current is commutated to the main switch MS, after the turning on, a chopper operation will be restored for firing a thyristor SS by an inversion of charge polarity of a commutation condenser C1. In case of the main contact MSM turned off, if under a condition with a charge voltage of the commutation condenser C1 incapable of commutating the main switch SM, an output of comparator COMP becomes zero to inhibit a firing of the main switch SM.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11079077A JPS5443525A (en) | 1977-09-13 | 1977-09-13 | Chopper device for controlling dc power |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11079077A JPS5443525A (en) | 1977-09-13 | 1977-09-13 | Chopper device for controlling dc power |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5443525A true JPS5443525A (en) | 1979-04-06 |
Family
ID=14544689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11079077A Pending JPS5443525A (en) | 1977-09-13 | 1977-09-13 | Chopper device for controlling dc power |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5443525A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0171757A2 (en) * | 1984-08-16 | 1986-02-19 | Henkel Kommanditgesellschaft auf Aktien | Process for making an optical fibre with high tensile strength |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5037366A (en) * | 1973-08-06 | 1975-04-08 | ||
JPS5040445A (en) * | 1973-08-16 | 1975-04-14 |
-
1977
- 1977-09-13 JP JP11079077A patent/JPS5443525A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5037366A (en) * | 1973-08-06 | 1975-04-08 | ||
JPS5040445A (en) * | 1973-08-16 | 1975-04-14 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0171757A2 (en) * | 1984-08-16 | 1986-02-19 | Henkel Kommanditgesellschaft auf Aktien | Process for making an optical fibre with high tensile strength |
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