JPS55127885A - Method for detecting missing phase in output of three- phase inverter - Google Patents
Method for detecting missing phase in output of three- phase inverterInfo
- Publication number
- JPS55127885A JPS55127885A JP3424079A JP3424079A JPS55127885A JP S55127885 A JPS55127885 A JP S55127885A JP 3424079 A JP3424079 A JP 3424079A JP 3424079 A JP3424079 A JP 3424079A JP S55127885 A JPS55127885 A JP S55127885A
- Authority
- JP
- Japan
- Prior art keywords
- output
- phase
- missing
- counter
- ripples
- 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
- Control Of Ac Motors In General (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
Abstract
PURPOSE: To detect the missing phase on the output side of an inverter by detecting the difference in the number of ripples in a DC-side current in one period of an output AC frequency.
CONSTITUTION: The number of ripples in the current flowing in a power-supply detector 7 when phases are not missing is 6, and this output is fed into a counter 10 via a filter 8 and a wave-forming circuit 9. When four or more pulses are fed into the counter 10, a flip-flop FF3 is reset. When a phase is missing, the number of ripples flowing in the current detector 7 becomes 2, and this output is input to the counter 10 through the filter 8 and the wave-forming circuit 9, but the flip-flop FF3 is not reset.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3424079A JPS55127885A (en) | 1979-03-26 | 1979-03-26 | Method for detecting missing phase in output of three- phase inverter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3424079A JPS55127885A (en) | 1979-03-26 | 1979-03-26 | Method for detecting missing phase in output of three- phase inverter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55127885A true JPS55127885A (en) | 1980-10-03 |
JPS633548B2 JPS633548B2 (en) | 1988-01-25 |
Family
ID=12408627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3424079A Granted JPS55127885A (en) | 1979-03-26 | 1979-03-26 | Method for detecting missing phase in output of three- phase inverter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55127885A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03261395A (en) * | 1990-03-08 | 1991-11-21 | Mitsubishi Electric Corp | Protector of air conditioner |
CN103166566A (en) * | 2011-12-12 | 2013-06-19 | 京都电机器株式会社 | Three-phase motor driving control device |
JP2013132099A (en) * | 2011-12-20 | 2013-07-04 | Kyoto Denkiki Kk | Three-phase motor drive controller |
-
1979
- 1979-03-26 JP JP3424079A patent/JPS55127885A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03261395A (en) * | 1990-03-08 | 1991-11-21 | Mitsubishi Electric Corp | Protector of air conditioner |
CN103166566A (en) * | 2011-12-12 | 2013-06-19 | 京都电机器株式会社 | Three-phase motor driving control device |
JP2013123334A (en) * | 2011-12-12 | 2013-06-20 | Kyoto Denkiki Kk | Three-phase motor drive controller |
KR101461707B1 (en) * | 2011-12-12 | 2014-11-13 | 교토덴키키 가부시키가이샤 | Three-phase motor drive control device |
JP2013132099A (en) * | 2011-12-20 | 2013-07-04 | Kyoto Denkiki Kk | Three-phase motor drive controller |
Also Published As
Publication number | Publication date |
---|---|
JPS633548B2 (en) | 1988-01-25 |
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