Hybrid PWM rectifiers to reduce electromagnetic interference

A hybrid PWM rectifier is proposed as a method to reduce the electromagnetic interference. The hybrid PWM rectifier consists of parallel-connected two component bridge circuits, that is, main and auxiliary bridge circuits. The main bridge circuit to handle the active power has a full current rating and a low switching frequency. The auxiliary bridge circuit to improve the input current waveform has a small current rating and a high switching frequency. Because the high-frequency switching of the full current can be avoided in the hybrid rectifier, the EMI can be reduced. The effectiveness of the proposed hybrid PWM rectifier is demonstrated by some experimental results.

[1]  Seung-Ki Sul,et al.  A common mode voltage reduction in boost rectifier/inverter system by shifting active voltage vector in a control period , 2000 .

[2]  Yuqing Tang,et al.  Modeling-based examination of conducted EMI emissions from hard- and soft-switching PWM inverters , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[3]  Russel J. Kerkman,et al.  EMI emissions of modern PWM AC drives , 1999 .

[4]  Yukihiko Sato,et al.  A new control strategy for voltage type PWM rectifiers to realise zero steady-state control error in input current , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[5]  A. von Jouanne,et al.  Use of sigma-delta modulation to control EMI from switch-mode power supplies , 2001, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[6]  Thomas A. Lipo,et al.  A four level rectifier-inverter system for drive applications , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.