Bidirectional booster converter with soft-switching for power supply systems

Authors: Osipov A. V., Shemolin I. S., Lopatin A. A., Latypov R. A.

Annotation: The paper considers a bi-directional booster converter with an active rectifier for charge-discharge of a battery of power systems of space vehicles. Switching processes are considered, it is shown that in the booster converter due to the bipolar current of the smoothing-inductor the recovery interval is formed, which ensures drain-source capacitances pre-dump of the transistors of the inverter, which results in the inclusion at zero voltage. The battery charge mode is considered, it is shown that a large value of the negative current of the throttle leads to commutation voltage surges when the rectifier transistors are turned off, which can be eliminated by increasing the drainsource capacitances of rectifier transistors. The soft switching range can be significantly extended by adjusting the conversion frequency by the condition that the regeneration interval appears. It is shown that, in the absence of overstating the transformer induction, the limiting range of the ZVS reaches 80% of the maximum. An experimental verification of the results obtained is made, conclusions are drawn, and the results obtained are discussed.

Keywords: power supply system, booster converter, soft switching