JPS5523722A - Controller for induction motor - Google Patents

Controller for induction motor

Info

Publication number
JPS5523722A
JPS5523722A JP9329678A JP9329678A JPS5523722A JP S5523722 A JPS5523722 A JP S5523722A JP 9329678 A JP9329678 A JP 9329678A JP 9329678 A JP9329678 A JP 9329678A JP S5523722 A JPS5523722 A JP S5523722A
Authority
JP
Japan
Prior art keywords
signal
speed
comparator
motor
induction motor
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
JP9329678A
Other languages
Japanese (ja)
Other versions
JPS6212754B2 (en
Inventor
Ichiro Shimizu
Setsuo Nakamura
Masateru Kuniyoshi
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 JP9329678A priority Critical patent/JPS5523722A/en
Publication of JPS5523722A publication Critical patent/JPS5523722A/en
Publication of JPS6212754B2 publication Critical patent/JPS6212754B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To reduce the rise in the primary voltage of an induction motor, by using a prescribed function generator when performing the constant-output filed weakening control of the motor.
CONSTITUTION: The output signal ωr of a rotational frequency detector 4 and a speed reference signal 7 are applied to a comparator 8 to produce a difference signal. The difference signal is supplied to an inverter 1 through a speed controller 9, a primary current instantaneous reference calculation circuit 18, a current refernce signal calculation circuit 19 and a phase conversion circuit 20. The speed of the induction motor 2 is regulated by a control signal supplied from the inverter. A comparator 16 which subtracts the output of an automatic field weakening control circuit and a calculated magnetic flux value ϕ2 from a field strengthening reference 15 and supplies a difference signal to a magnetic flux control circuit 17, a function genetator 22 which produces a prescribed function, multipliers 11, 21 and another comparator 13 are used to control the field system of the motor. When the speed of the induction motor rises to a ground level (angular velocity ωr=1), a field control signal is applied to the comparator 13 to reduce the rise in the speed of the motor.
COPYRIGHT: (C)1980,JPO&Japio
JP9329678A 1978-07-31 1978-07-31 Controller for induction motor Granted JPS5523722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9329678A JPS5523722A (en) 1978-07-31 1978-07-31 Controller for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9329678A JPS5523722A (en) 1978-07-31 1978-07-31 Controller for induction motor

Publications (2)

Publication Number Publication Date
JPS5523722A true JPS5523722A (en) 1980-02-20
JPS6212754B2 JPS6212754B2 (en) 1987-03-20

Family

ID=14078397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9329678A Granted JPS5523722A (en) 1978-07-31 1978-07-31 Controller for induction motor

Country Status (1)

Country Link
JP (1) JPS5523722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6334101A (en) * 1986-07-29 1988-02-13 株式会社名南製作所 Tenderizing device for veneer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313127A (en) * 1976-07-22 1978-02-06 Toshiba Corp Controller for induction motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313127A (en) * 1976-07-22 1978-02-06 Toshiba Corp Controller for induction motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6334101A (en) * 1986-07-29 1988-02-13 株式会社名南製作所 Tenderizing device for veneer

Also Published As

Publication number Publication date
JPS6212754B2 (en) 1987-03-20

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