A novel inductor-coupled ZVT inverter with reduced harmonics and losses

This paper investigates conventional inductor-coupled ZVT inverters. The investigation reveals two types of circulating currents-freewheeling current and magnetizing current-and their influence on the inverter performance, efficiency and EMI. This paper proposes a novel inductor-coupled ZVT inverter that eliminates those circulating currents. While the proposed inverter achieves the same zero-voltage commutation as conventional inverters, it improves both efficiency and EMI performance by eliminating the circulating currents. In addition, its structure is simplified by removing the saturable inductors and by reducing the number of inductors.

[1]  I. Barbi,et al.  A true PWM zero-voltage switching pole, with very low additional RMS current stress , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[2]  Dushan Boroyevich,et al.  Drive cycle evaluation of soft-switched electric vehicle inverter , 1997, Proceedings of the IECON'97 23rd International Conference on Industrial Electronics, Control, and Instrumentation (Cat. No.97CH36066).

[3]  Fred C. Lee,et al.  Efficiency considerations of load side soft-switching inverters for electric vehicle applications , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[4]  G. W. Ott,et al.  A delta configured auxiliary resonant snubber inverter , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[5]  I. Barbi,et al.  Soft-switched three level capacitor clamping inverter with clamping voltage stabilization , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[6]  R.W. De Doncker,et al.  The auxiliary resonant commutated pole converter , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.