| Title |
An Improvement of Output Voltage Control Performance for Low Voltage Region of Matrix Converter |
| Authors |
전병영(Byung-Young Chun) ; 김동일(Dong-Il Kim) ; 전동훈(Dong-Hoon Jeon) ; 문상필(Sang-Pil Mun) ; 우경일(Kyung-Il Woo) |
| DOI |
https://doi.org/10.5370/KIEEP.2023.72.4.237 |
| Keywords |
Matrix Converter; Soft Switching; Output Voltage Control Performance; Voltage Source Inverter; PWM pulse-widths are controlled |
| Abstract |
The matrix converter(MxC)is an ac-to-ac conversion device that can generate variable magnitude variable frequency output voltage.
Nine bi-directional switches of MxC allow PWM control of output voltages and input currents. PWM switching needs “switch commutations” from one switch to another. During the switch commutations, however, unwanted voltage error occurs like a dead time effect in Voltage Source Inverter(VSI). When PWM pulse width is narrower than the time required for the commutation, voltage error rapidly increases. This voltage distortion is critical in the low speed operation as system becomes sensitive to even a small voltage error. In this paper, a new PWM strategy is proposed for improving voltage control performance in the low voltage region. Based on the input and output voltage information, PWM pulse-widths are controlled to avoid incomplete commutations. The feasibility of the proposed method is proved by simulation and experimental results |