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High frequency linked ZVS PWM DC-DC power converter with ON/OFF-assisted synchronous rectifiers
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| Author(s) |
S. Sato; S. Moisseev; M. Nakaoka |
| Abstract |
In this paper, a full bridge edge-resonant zero voltage mode based soft-switching PWM DC-DC
power converter with a high frequency center tapped transformer link stage is presented from a
practical point of view. The power MOSFETs operating as synchronous rectifier devices are
implemented in the rectifier center tapped stage to reduce conduction power losses and also to
extend the transformer primary side power MOSFETs ZVS commutation area from the rated to
zero load without a requirement of a magnetizing current. The steady-state operation of this
phase-shift PWM controlled power converter is described in comparison with a conventional ZVS
phase-shift PWM DC-DC converter using the diodes rectifier. Moreover, the experimental results
of the switching power losses analysis are evaluated and discussed in this paper. The practical
effectiveness of the ZVS phase-shift PWM DC-DC power converter treated here is actually
proved by using 2.5kW-32kHz breadboard circuit. An actual efficiency of this converter is
estimated in experiment and is achieved as 97% at maximum. |
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| Filename: | EPE2003-PP1054 - Sato |
| Filesize: | 507.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2003-10-22 by Unknown |
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