Title:
SPEED CONTROLLER OF WOUND-ROTOR TYPE INDUCTION MOTOR
Document Type and Number:
Japanese Patent JPS6115581
Kind Code:
A
Abstract:
PURPOSE:To switch without affecting an adverse influence due to variation in the speed of an induction motor to a load by detecting the speed of the motor by the resistance value of the secondary side resistor, and using a comparison signal of the speed with a speed feedback signal as a switching signal of controlling the speed. CONSTITUTION:A speed detector 9 for detecting the speed of a motor IM from the resistance value of a resistor R provided at the secondary side of the motor IM and a comparison detector 10 for detecting a deviation between a speed signal from the detector and a speed feedback signal from an F/V converter 3 are provided. When the motor IM is shifted from the speed control by a Scherbius unit to the speed control by a resistor R during operation, an output signal of the detector 10 when the deviation detected by the detector 10 becomes zero is used as a transfer signal.
Inventors:
SUZUKI TOKUHO
Application Number:
JP13590284A
Publication Date:
January 23, 1986
Filing Date:
June 30, 1984
Export Citation:
Assignee:
TOSHIBA KK
International Classes:
H02P23/00; H02P23/07; H02P23/16; H02P27/05; (IPC1-7): H02P5/28
Attorney, Agent or Firm:
Takehiko Suzue
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