This paper deals with modified series-parallel resonant converter (MSPRC). Leakage inductance and winding capacitance of high-frequency transformer are incorporated in the analysis of basic operation of circuit. MSPRC is well suited to high-voltage dc applications, and is operated just above the resonant frequency to maintain zero-voltage switching (ZVS). Sampled-data technique of the MSPRC is presented, and small signal modelling of the converter is obtained. Steady-state behaviour using complex ac-circuit analysis is used for design of resonant tank circuit. The magnitude of output voltage is regulated by using variable frequency control. An experimental prototype unit is developed using high frequency switches (MOSFETs). Simulation results are compared with those obtained experimentally.
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