Conditional over-voltage protection for redundant phase-shift converters

摘要

An over-voltage protection circuit for power supplies employing phase-shift controllers is provided. The power supplies typically comprise a redundant system for maintaining availability of bus voltage in the event of the failure of one of the supplies. The circuitry provides advantages in high power applications over prior art by overcoming the inefficiencies of connecting the supplies to a common bus through a diode. Additional circuitry eliminates the false shutdown of working power supplies.