Title:
CONTROLLER FOR INDUCTION MOTOR
Document Type and Number:
Japanese Patent JPS59103588
Kind Code:
A
Abstract:
PURPOSE:To enable to obtain by high speed calculation a current command signal of a current control system from the vector calculation result without increasing the cost of an induction motor by using the integrated result of the previous cycle stored in a memory. CONSTITUTION:An inverter frequency omega1, a primary current amplitude I1 and a primary current phase theta1 obtained from the result of the vector calculation of a microprocessor are transferred to the register 75 and CREFReg 71 of a current instructing circuit 59 of a hard configuration. The instructing circuit 59 adds (SIGMAomega1+omega'1) DELTAt corresponding to integral omega1dt by an adder 76 by using the DDReg 78 storing the angle calculation result of the previous cycle, and adds (SIGMAomega1+omega'1) at next timing in a time division manner by a stage signal generated from a stage signal generator 72 and then rapidly calculates the current command signal of a current control system from the vector calculation result.
Inventors:
MUTOU NOBUYOSHI
TOMITA HIROYUKI
SAKAI KEIJIROU
TOMITA HIROYUKI
SAKAI KEIJIROU
Application Number:
JP20935482A
Publication Date:
June 15, 1984
Filing Date:
December 01, 1982
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H02P21/00; H02P21/04; H02P21/06; H02P21/22; H02P21/34; H02P21/36; H02P23/03; H02P23/07; H02P23/08; H02P23/16; H02P23/24; H02P27/04; H02P27/08; (IPC1-7): H02P5/34
Attorney, Agent or Firm:
Tatsuyuki Unuma (1 outside)