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This paper presents a novel zero current softswitching (ZCS) pulse width modulation (PWM) bidirectional dc-dc converter (BDC) under the high frequency(HF) switching condition. In the proposed soft-switching BDC, all the power devices operate by ZCS commutation modes with aid of the edge-resonant switching cells, whereby the switching power losses can be minimized. The buck and boost voltage regulation...
Power supplies prepare for a power failure often apply converters in the input side, and use inverters in the output side. The input side and the output side of power supply are coupled by high frequency transformer. This method requires a transformer. Because the switch devices included in the power flow increase, the power conversion efficiency declines. Though, high frequency transformer-less circuits...
This paper concerned with an advanced practical development of utility grid-tied 3 phase voltage source type is instantaneous current controlled inverter with minimized pulse switching number-based pulse modulation strategy. It is a key issue that newly-proposed utility inverter incorporates a new conceptual extended neutral point voltage shifting module into the d-q synchronous rotating cordinate...
In this paper, a comparative study of modified phase-angle, extinction-angle, and pulse width modulation control techniques for the purpose of power factor improvement of single-phase AC-AC voltage regulators have been illustrated as applied to a single-phase AC voltage converter by an example of the widely used single-phase induction motor as a dynamic load. Observations on power factor, displacement...
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