Filter apparatus for use in an inverter apparatus
US6151228A · kind A · utility
35Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Oct 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.