Title:
CONTROLLER FOR THYRISTOR MOTOR
Document Type and Number:
Japanese Patent JPS59153484
Kind Code:
A
Abstract:
PURPOSE:To obtain a controller for a thyristor motor capable of holding a torque command and torque generated from the motor in a proportional relationship by compensating the variation in the power factor upon varying of the phase of an armature current by correcting a compensating field current. CONSTITUTION:Torque generated from a synchronous motor 3 is proportional to the value obtained by dividing the power subtracted by copper loss from the input power of the motor by the rotating speed, and the input of the motor is equal to the DC input of an inverter 2. Accordingly, to generate the torque proportionally to the DC current Id, it is controlled so that the rotating speed omegar is proportional to (Ed-2RaId), where Ed: DC voltage, Ra: armature resistance. A coefficient unit 25 generates the voltage proportional to the rotating speed omegar, a voltage detector detects the DC voltage Ed, and a subtractor 28 calculates Ed-2RaId by the 2RaId calculated by a coefficient unit 26. A DC voltage controller 29 compares the both inputs, and outputs a correction signal DELTAIc in the direction of increasing the compensating field current Ic' when the DC voltage increases larger than the reference value and, on the contrary, in the direction of decreasing the current.
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Inventors:
HOSOKAWA YASUHIKO
MORISHIMA NAOKI
MORISHIMA NAOKI
Application Number:
JP2983683A
Publication Date:
September 01, 1984
Filing Date:
February 22, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P6/06; H02P6/08; H02P6/15; H02P6/28; H02P6/32; H02P25/02; (IPC1-7): H02P5/00
Attorney, Agent or Firm:
Masuo Oiwa