Electric power switching apparatus providing reduced degree of noise interference with radio communication
US7425781B2 · kind B2 · utility
4Cited by
16References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 28, 2005 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Dec 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2215/067
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electric power switching apparatus a control circuit generates a switching control signal, for controlling successive current switching operations, as a of succession of pulse period patterns with each pulse period pattern made up of one or more successive pulses each having an identical pulse period, and with successive pulse period patterns constituting the control signal having respectively different values of pulse period. The noise power of high-frequency components resulting from the current switching is thereby dispersed along the frequency spectrum, reducing resultant radio noise interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.