Low-noise switching power supply

Details Low-noise switching power supply Low-noise switching power supply

1997-01-21

1999-09-21

Riley, Shawn

Electric power conversion systems

Current conversion

With conductive support mounting

H02M 1100

Patent

active

059562463

ABSTRACT:
A power supply apparatus which includes at least one switching power supply disposed in a chassis connected to earth ground and at least one D.C. to D.C. converter whose inputs float with respect to system ground. To reduce transmission of high-frequency electrical switching energy from the switching power supply to the load, the invention contemplates a tuned reactive circuit connected between the system ground and the earth ground. Electrical switching energy is shunted to earth ground by way of bypass capacitors located at various stages of the power supply apparatus. A further aspect of the apparatus contemplates the interposition of low-pass filters between the switching power supply and one or more D.C. to D.C. converters connected to the power supply and/or between the D.C. to D.C. converters and their respective loads to effectively eliminate radiated electromagnetic energy.

REFERENCES:
patent: 3818128 (1974-06-01), Chambers et al.
patent: 4030024 (1977-06-01), Chambers et al.
patent: 5414340 (1995-05-01), Gannon

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