Title :
Soft switching and interleaving for sinusoidal input current AC to DC step down converters
Author :
Tooth, D.J. ; Finney, S.J. ; Mcneil, J.N. ; Williams, B.W.
Author_Institution :
Dept. of Comput. & Electr. Eng., Heriot-Watt Univ., Edinburgh, UK
Abstract :
A modified PWM scheme reduces switching losses (compared to centre aligned PWM) by a theoretical 32% in a three phase AC-DC step down converter with sinusoidal input currents. This scheme does not rely on the addition of any extra components, but rather solely on the adjustment of the PWM scheme. It is also shown that two paralleled converters´ PWM patterns can be interleaved so as to reduce supply conducted switching harmonics. The effect of supply flat topping is also considered and the low frequency harmonic distortion produced is eliminated
Keywords :
AC-DC power convertors; PWM power convertors; harmonic distortion; losses; power system harmonics; switching circuits; AC to DC step down converters; interleaved PWM patterns; low frequency harmonic distortion; paralleled converters´ PWM patterns; sinusoidal input current; soft switching; supply conducted switching harmonics reduction; supply flat topping; switching losses reduction; Analog-digital conversion; Frequency; Interleaved codes; Pulse width modulation; Pulse width modulation converters; Space vector pulse width modulation; Switches; Switching converters; Switching loss; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548579
