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Variable Structure Control of Ultrasonic Motor
Tomoyoshi Takeuchi,Yutaka Nagai,Phongchai Phatpanichot 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
In position control system using ultrasonic motor, the velocity of control object is controlled to approach the desired specified velocity patterns, and eventually, the position of control object is correctly at reference position This intention, here, can be success by means of variable structure control In this paper, the PI velocity feedback control is also used inside variable structure controller in order to compensate the velocity offset The design of position controller under specified velocity profiles in variable structure control's constraints is studied.
THE SPEED CONTROL SYSTEM OF AN INDUCTION TYPE AC SERVOMOTOR BY VECTOR CONTROL
S.I.Hong,C.J.Joe,Tomoyoshi Takeuchi 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
In this paper, the transient state equations and vector control algorithms of an induction type servomotor are described mathematically by using the two-axis theory(d-q coordinates). According to the result of these algorithms, we scheme the speed control system for the motor in which vector control is adopted to give it high performance. Motor drive through a PWM inverter with power MOS-FET is controlled so that the actual input current to the motor may track the current reference obtained from a microcomputer(8086 cpu). Driving experiments are performed in the range of 0 to 3000 rpm, and it xt is verified that high speed response is possible.<br/>