Electric interference limitation
US9755499B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2015 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | May 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and an arrangement for limiting the interference to a common electric power network, generated by a power electronics device, e.g. a frequency converter, which power electronics device comprises of at least one switch type component being able to change the output voltage value at a predefined permissible switching frequency range. The method comprises scanning through the permissible switching frequency range, recording measured common mode current values as a function of the switching frequency, and setting the final switching frequency of the switch type component out of a value where a local maximum value of the common mode current has been recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.