Filter apparatus for use in an inverter apparatus

Details Filter apparatus for use in an inverter apparatus Filter apparatus for use in an inverter apparatus

1998-10-16

2000-11-21

Sterrett, Jeffrey

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 37, H02M 114

Patent

active

061512281

ABSTRACT:
A filter apparatus has a current-detecting coil. The coil detects a high-frequency leak current flowing from the phase-windings of a motor to the earth terminal through the closed case of a compressor. A current-canceling circuit generates a current similar in waveform to the high-frequency leak current detected by the coil. The current thus generated cancels out the high-frequency leak current.

REFERENCES:
patent: 4833377 (1989-05-01), Volk et al.
patent: 4849950 (1989-07-01), Sugiura et al.
patent: 4888675 (1989-12-01), Kumar et al.
patent: 5905642 (1999-05-01), Hammond
patent: 5936856 (1999-08-01), Xiang

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