Title :
Improvement of power factor using modified series-parallel resonant converter
Author :
Suryawanshi, H.M. ; Tarnekar, S.G.
Author_Institution :
Dept. of Electr. Eng., Visvesvaraya Regional Coll. of Eng., Nagpur, India
Abstract :
Characteristics of high-frequency modified series-parallel resonant converter (MSPRC) operating in high power factor mode are presented. This converter uses a capacitive output filter. Variable-frequency and fixed-frequency controls are used to regulate the magnitude of output voltage and power. Based on the complex AC-circuit analysis of a DC-to-DC converter, a MSPRC is designed. Such an AC-DC converter has a high power factor even with no active control of input line current. Design criteria that incorporate transformer nonidealities are developed, and are employed in the construction of a high-voltage prototype converter. PSPICE simulation results for the converter so designed and experimental results for a 250 W, 1 kV converter are presented to verify the performance of the proposed converter for varying load conditions. The converter operates in lagging power factor mode for the entire load range
Keywords :
AC-DC power convertors; SPICE; filters; power control; power factor; resonant power convertors; voltage control; 1 kV; 250 W; AC-DC converter; DC-to-DC converter; PSPICE simulation; capacitive output filter; complex AC-circuit analysis; fixed-frequency controls; high frequency transformer; high power factor; high power factor mode; lagging power factor mode operation; modified series-parallel resonant converter; output voltage magnitude regulation; power factor improvement; power regulation; transformer nonidealities; variable-frequency controls; varying load conditions; Capacitors; Frequency conversion; Hafnium; Power harmonic filters; RLC circuits; Reactive power; Rectifiers; Resonance; Resonant inverters; Voltage control;
Conference_Titel :
Power Quality '98
Conference_Location :
Hyderabad
DOI :
10.1109/PQ.1998.710362
