JPS5556495A - A.c. motor controller - Google Patents

A.c. motor controller

Info

Publication number
JPS5556495A
JPS5556495A JP12811678A JP12811678A JPS5556495A JP S5556495 A JPS5556495 A JP S5556495A JP 12811678 A JP12811678 A JP 12811678A JP 12811678 A JP12811678 A JP 12811678A JP S5556495 A JPS5556495 A JP S5556495A
Authority
JP
Japan
Prior art keywords
amplifier
stall
stall detection
signal
circuit
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
JP12811678A
Other languages
Japanese (ja)
Other versions
JPS6013400B2 (en
Inventor
Suzuo Saitou
Yasuhiro Ando
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP53128116A priority Critical patent/JPS6013400B2/en
Publication of JPS5556495A publication Critical patent/JPS5556495A/en
Publication of JPS6013400B2 publication Critical patent/JPS6013400B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Motor And Converter Starters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To reduce power loss by eddy current flowing at stalled operation, a stall detection circuit is used which detects the stall on the basis of an error signal obtained by comparing detected voltage with the reference value.
CONSTITUTION: In this stall detection circuit 32, the reference voltage signal and detected voltage signal enter the amplifier 35 through the resistances 33, 34 respectively. An error signal between both signals enters the amplifier 39 through the resistance 37. The amplifier 39, together with the Zener diode 42 in parallel, constitutes a switching circuit and allows the transistor 43 to become conductive when the output from the amplifier 35 exceeds the reference error value. This excites the coil of the relay 44, the contact circuit of which acts to generate a stall detection signal to thereby control an a.c. motor.
COPYRIGHT: (C)1980,JPO&Japio
JP53128116A 1978-10-18 1978-10-18 AC motor control device Expired JPS6013400B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53128116A JPS6013400B2 (en) 1978-10-18 1978-10-18 AC motor control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53128116A JPS6013400B2 (en) 1978-10-18 1978-10-18 AC motor control device

Publications (2)

Publication Number Publication Date
JPS5556495A true JPS5556495A (en) 1980-04-25
JPS6013400B2 JPS6013400B2 (en) 1985-04-06

Family

ID=14976766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53128116A Expired JPS6013400B2 (en) 1978-10-18 1978-10-18 AC motor control device

Country Status (1)

Country Link
JP (1) JPS6013400B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899297A (en) * 1981-12-09 1983-06-13 Fuji Electric Co Ltd System for detecting shift of induction motor to unstable region by inverter driving control
JPS6447295A (en) * 1987-08-11 1989-02-21 Toshiba Corp Motor controller
WO2000019593A1 (en) * 1998-09-25 2000-04-06 Fumito Komatsu Synchronous motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178998A (en) * 1987-01-12 1988-07-23 トウフク株式会社 Slurry high-pressure force-feed method and device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899297A (en) * 1981-12-09 1983-06-13 Fuji Electric Co Ltd System for detecting shift of induction motor to unstable region by inverter driving control
JPS6447295A (en) * 1987-08-11 1989-02-21 Toshiba Corp Motor controller
WO2000019593A1 (en) * 1998-09-25 2000-04-06 Fumito Komatsu Synchronous motor
US6424114B1 (en) 1998-09-25 2002-07-23 Fumito Komatsu Synchronous motor

Also Published As

Publication number Publication date
JPS6013400B2 (en) 1985-04-06

Similar Documents

Publication Publication Date Title
GB1494727A (en) Apparatus for supply and control of dc current
JPS5556495A (en) A.c. motor controller
JPS6422477A (en) Power source controller for inverter type resistance welding machine
JPS54144922A (en) Control system for switching power
JPS56110208A (en) Magnetization device
ES2174382T3 (en) DIFFERENTIAL CURRENT PROTECTION DEVICE WITH A TRANSDUCER CIRCUIT.
JPS535746A (en) Over-curren t sensing device of dc motor
JPS57179829A (en) Stop detecting circuit for film winding motor of camera
JPS52122455A (en) Detecting system for contact opening and closing abnormality
JPS55126377A (en) Current detecting circuit for arc welding machine
JPS57189565A (en) Chopper circuit
JPS56159716A (en) Direct-current electric power device
JPS55104731A (en) Abnormal temperature detector with thermo-sensitive electric wire
JPS57145502A (en) Regenerative brake controlling device of electric motor vehicle
JPS56108117A (en) Control method of electric power converter
JPS5497752A (en) Protective circuit for switching regulator
JPS5681003A (en) Method and apparatus for controlling electric car
JPS57130281A (en) Driving method for magnetic bubble memory device
JPS5688514A (en) Power source circuit
JPS549389A (en) Temprature controller
JPS5654530A (en) Voltage abnormality detector
JPS55138665A (en) Detecting system of operation fault of heating source
JPS56129460A (en) Overcurrent preventing device
JPS57201335A (en) Ac 2-line system contactless switch
JPS55160904A (en) Method and device for controlling dc compound motor for electric rolling stock