Power supply with reduced EMI

Details Power supply with reduced EMI Power supply with reduced EMI

1997-04-28

1998-08-04

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

057903905

ABSTRACT:
A power supply system includes an a-c. power source and an off-line power supply for storing energy from the a-c. power source during first selected time intervals and converting at least a portion of the stored energy to a d-c. output during second selected time intervals. A diode or other switch disconnects the off-line power supply from the a-c. power source during the second selected time intervals to reduce conducted EMI. The first and second selected time intervals are preferably synchronized to the frequency of the a-c. power source.

REFERENCES:
patent: 4956760 (1990-09-01), Gulczynski
patent: 5155430 (1992-10-01), Gulczynski
patent: 5331534 (1994-07-01), Suzuki et al.

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