JPS55127885A - Method for detecting missing phase in output of three- phase inverter - Google Patents

Method for detecting missing phase in output of three- phase inverter

Info

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
Application number
JP3424079A
Other languages
Japanese (ja)
Other versions
JPS633548B2 (en
Inventor
Someji Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HARA DENKI KK
Original Assignee
HARA DENKI KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HARA DENKI KK filed Critical HARA DENKI KK
Priority to JP3424079A priority Critical patent/JPS55127885A/en
Publication of JPS55127885A publication Critical patent/JPS55127885A/en
Publication of JPS633548B2 publication Critical patent/JPS633548B2/ja
Granted legal-status Critical Current

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
JP3424079A 1979-03-26 1979-03-26 Method for detecting missing phase in output of three- phase inverter Granted JPS55127885A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS5676637A (en) Phase synchronizing circuit
JPS55127885A (en) Method for detecting missing phase in output of three- phase inverter
JPS5439843A (en) Ac power source
JPS5679223A (en) Detecting system for instantaneous torque of ac motor
JPS52142555A (en) Ripple removing apparatus
JPS54120818A (en) Torque detector for multiphase ac machine
JPS54113044A (en) Ground faulted phase detecting relay
JPS5440669A (en) Detector for multi-phase ac flectricity
JPS57153570A (en) Constant-voltage and constant-frequency power source
JPS54120841A (en) Ac power unit
JPS5518883A (en) Starter of frequecy converters
JPS5445739A (en) Inverter divece
JPS5471347A (en) State detector
JPS54132744A (en) Phase-missing detector
JPS5315169A (en) 3-phase ac detection circuit
JPS5288747A (en) Protecting system for inverter
JPS5576411A (en) Phase control circuit
JPS52150515A (en) Fault detector for inverter
JPS54127509A (en) Abnormality detector of rotor winding
JPS5532134A (en) Control system for power converter
JPS5347925A (en) Inverter overvoltage protection system
JPS54734A (en) Inverter unit
JPS53145043A (en) Detector for anti-phase and unbalance in three-phase circuit
JPS5591079A (en) A/d converter
JPS5350776A (en) Phase discrimination circuit