JPS5561292A - Speed controller of induction motor - Google Patents

Speed controller of induction motor

Info

Publication number
JPS5561292A
JPS5561292A JP13303278A JP13303278A JPS5561292A JP S5561292 A JPS5561292 A JP S5561292A JP 13303278 A JP13303278 A JP 13303278A JP 13303278 A JP13303278 A JP 13303278A JP S5561292 A JPS5561292 A JP S5561292A
Authority
JP
Japan
Prior art keywords
revolution
induction motor
speed
circuit
fixed
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.)
Pending
Application number
JP13303278A
Other languages
Japanese (ja)
Inventor
Shigeki Kawada
Hiroshi Ishida
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP13303278A priority Critical patent/JPS5561292A/en
Publication of JPS5561292A publication Critical patent/JPS5561292A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To operate an induction motor in approximate rated output characteristics, by mounting an inverter circuit for driving the induction motor and a frequency control means for increasing or decreasing inverter control frequency in a shape that is proportioned to difference between instruction revolution speed and the speed of revolution of the induction motor.
CONSTITUTION: Revolution speed signals input to an instruction signal correcting circuit 1 increase the number of revolution of an induction motor 12 in ideal, fixed torque characteristics. When the speed of the revolution exceeds base speed, the crest value of pulses for driving the induction motor put out from a pulse width controller 11 is restrained in fixed value by means of a reference voltage generating circuit 8, and the induction motor 12 is thereafter controlled in a variable frequency drive shape. The number of revolution of the induction motor 12 is slowly increased with fixed output characteristics after that point of time. The output of the input signal correcting circuit 1 is kept in the same level as a revolution speed instruction signal level by feedback action in the circuit while the induction motor 12 continues its revolution at the speed of revolution instructed.
COPYRIGHT: (C)1980,JPO&Japio
JP13303278A 1978-10-28 1978-10-28 Speed controller of induction motor Pending JPS5561292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13303278A JPS5561292A (en) 1978-10-28 1978-10-28 Speed controller of induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13303278A JPS5561292A (en) 1978-10-28 1978-10-28 Speed controller of induction motor

Publications (1)

Publication Number Publication Date
JPS5561292A true JPS5561292A (en) 1980-05-08

Family

ID=15095206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13303278A Pending JPS5561292A (en) 1978-10-28 1978-10-28 Speed controller of induction motor

Country Status (1)

Country Link
JP (1) JPS5561292A (en)

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