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Steady‐state torque control system with secondary‐current feedback for three‐phase squirrel‐cage induction motors
Author(s) -
Inuzuka Katsumi,
Matsui Hiromu,
Mohri Kaneo
Publication year - 1995
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391150708
Subject(s) - control theory (sociology) , multivibrator , torque , direct torque control , integrator , engineering , squirrel cage rotor , signal (programming language) , induction motor , steady state (chemistry) , control system , computer science , control (management) , physics , electrical engineering , chemistry , voltage , artificial intelligence , thermodynamics , programming language
This paper presents a highly stable steady‐state torque control system with a feedback of a secondary current signal. The torque control system is constructed with a feedback of the secondary current ( I 2 ) signal using a quick response magnetic‐field sensor constructed with an amorphous core multivibrator bridge, which can solve the secondary resistance change problem for temperature variation in the IM. Moreover, we added a state feedback to the system to improve the response speed for the unit step function of a torque order. The I 2 sensor method has advantages especially at a low‐speed range, in which conventional method using an integrator shows control errors.