JPS5454225A - Method of variable speed control of ac motor with cyclo-converter - Google Patents
Method of variable speed control of ac motor with cyclo-converterInfo
- Publication number
- JPS5454225A JPS5454225A JP12004777A JP12004777A JPS5454225A JP S5454225 A JPS5454225 A JP S5454225A JP 12004777 A JP12004777 A JP 12004777A JP 12004777 A JP12004777 A JP 12004777A JP S5454225 A JPS5454225 A JP S5454225A
- Authority
- JP
- Japan
- Prior art keywords
- switching
- time
- cyclo
- converter
- variable speed
- 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
Abstract
PURPOSE: To permit prompt regeneration of motor or reactor energy on the power source side by causing a cyclo-converter element to be fired for a short period of time only for a short period of time at the time of the switching from direct input drice to cyclo-converter variable speed drive.
CONSTITUTION: A power source side commutation command isgnal generating circuit 21 and a load side commutation command signal generating circuit 22 and a switching signal generator 23 for effecting switching between derect input drive and cyclo-converter variable speed drice are connected to NAND circuits 24 to 29, through which a signal "0" is provided to a thyristor gate pulse amplifier 30 when the output of the circuit 22 and 23 are "1". Thus, when the output of the switching singla generator 23 is changed from "0" to "1", a signal "1" is produced for a constant period of time to forcibly lock the circuit 22 to xx "1" while causing a phase controller 32 to reduce the firing phase angle to the ϒ side. In this way, switching can be effected safely and in a short period of time
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52120047A JPS5943920B2 (en) | 1977-10-07 | 1977-10-07 | Variable speed control method for AC motor using cycloconverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52120047A JPS5943920B2 (en) | 1977-10-07 | 1977-10-07 | Variable speed control method for AC motor using cycloconverter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5454225A true JPS5454225A (en) | 1979-04-28 |
JPS5943920B2 JPS5943920B2 (en) | 1984-10-25 |
Family
ID=14776570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52120047A Expired JPS5943920B2 (en) | 1977-10-07 | 1977-10-07 | Variable speed control method for AC motor using cycloconverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5943920B2 (en) |
-
1977
- 1977-10-07 JP JP52120047A patent/JPS5943920B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5943920B2 (en) | 1984-10-25 |
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