Active Auxiliary Resonant Snubber-assisted Soft-Switching Inverter operating under New Gate Pulse Pattern

概要

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This paper presents a new topology of the voltage source type bridge soft switching inverter circuit which proposes a novel active edge resonant snubber circuits using the auxiliary power switches. This advanced inverter is more suitable and acceptable for an uninterruptible power supply, such as PFC power converter, utility-interactive bi-directional power converter and new energy related distributed power supplies. The soft switching operation principle and design procedure of the active auxiliary edge resonant snubber circuit are described and discussed for the high power applications. Both the main active power switches and the auxiliary power switches achieve ZVS or ZCS for sinewave PWM inverter. This inverter does not need any sensor interfaced circuit to detect the voltage or the current and does not also required for the electrolytic chemical capacitors to make the neutral point of the DC power supply voltage side. This paper proposes a new gate timing pattern of switches in this soft switching inverter circuit, too. This method can limit the current of the active edge resonant snubber circuits lower than a level of the load current. As a result, the total efficiency characteristics of the converter system is improved high in all load range.
パワーエレクトロニクス学会の論文