| Title |
Performance Improvement on Cycloconverter-fed Induction Motor Speed Control System |
| Authors |
Cho, Ok-Kyun(Cho, Ok-Kyun) ; Shin, Hwi-Beom(Shin, Hwi-Beom) ; Yuon, Myung-Joong(Yuon, Myung-Joong) |
| Abstract |
The cycloconverter operating on a circulating current-free mode has many zero crossing points. If an exact zero crossing points are not detected, the three phase-unbalanced currents will flow in a motor. In this paper, the current feedback using a current reference wave is proposed to improve the problems of zero crossing detection, three phase-unbalanced voltages, currents, and torgue ripples. To prevent the saturation of the air gap flux and keep the torque constant, the constant voltage / hertz control with IR compensation is adopted. The PI-controller is designed using the linearized model of the cycloconverterinduction motor system. Alsi, Z-80A single board computer has been used to implement the proposed scheme which results in the performance improvement of cycloconterter-fed induction motor speed control system. |