Lossless passive soft-switching methods for inverters and amplifiers
This paper proposes lossless passive soft-switching methods for inverters developed from a synthesis procedure applicable to all pulsewidth modulation (PWM) converters. The lossless passive soft-switching converter properties and synthesis procedure are derived for inverters. Promising full-bridge and half-bridge soft-switching inverter examples are shown from the synthesis results. These include a new soft turn-on full bridge that contains only six components and a new soft turn-on and turn-off half bridge that contains 12 components. The voltage stress across the active switches can be easily maintained below 125% of V bus. Additionally, no transformers are used for energy recovery, eliminating their associated diode stress and leakage inductance problems. The theoretical and experimental waveforms and analysis are given.
Publication Source (Journal or Book title)
IEEE Transactions on Power Electronics
Smith, K., & Smedley, K. (2000). Lossless passive soft-switching methods for inverters and amplifiers. IEEE Transactions on Power Electronics, 15 (1), 164-173. https://doi.org/10.1109/63.817374