NDLI: New PWM converter circuits combining zero switching loss with low conduction loss

Content Provider	IEEE Xplore Digital Library
Author	Imbertson, P. Mohan, N.
Copyright Year	1990
Description	Author affiliation: Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA (Imbertson, P.; Mohan, N.)
Abstract	A new PWM (pulse width modulation) technique is presented and applied to two DC-DC power converters. The new converter topologies completely eliminate switching losses while retaining the low conduction losses typical of PWM circuits. The switches are operated for differing lengths of time, i.e., with unbalanced or asymmetrical duty cycles (for example, one switch at 40% and the other at 60%). The deadtime between switch conduction intervals is made long enough to insure that the switch voltages have commutated naturally from rail to rail, but not so long that the switch voltages have begun their return trip along their oscillatory path between the input rails. Thus, the best features of resonant (zero switching loss) and PWM (low conduction loss) circuits are combined. Design equations and notes are included for a buck type (step-down) and a boost type (step-up) converter.
Starting Page	179
Ending Page	185
File Size	348062
Page Count	7
File Format	PDF
DOI	10.1109/INTLEC.1990.171245
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-10-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation converters Switching loss Switches Pulse width modulation Voltage-controlled oscillators DC-DC power converters Switching converters Circuit topology Rail to rail inputs Resonance
Content Type	Text
Resource Type	Article

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