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이충환(Choong-Hwan Lee),김상봉(Sang-Bong Kim),하주식(Joo-Sik Ha) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
In recent years, induction motor is applied for several industrial actuating parts instead of direct current motor because of the robust construction. nonexpensive and maintenance-free actuator etc. and having capability of speed control according to development of power electronics and microprocessor techniques. In the paper, a microprocessor-based digital control approach for speed control of induction motor system is presented by considering a simple modeling equation as the system expression equation of induction motor and using the self tuning control and torque feedforward control method. As the model equation of the induction motor system, we use a second order differential equation which is well known in the modeling equation of the mechanical systems. The mechanical modeling equation is induced from the control theory stand point such that we can describe usually the motor system connected by inverter, generator and load etc. The effectiveness of the control system composed by the above mentioned design concept is illustrated by the experimental result in the presence of step reference change and generator load variation.