Suppression of switching harmonics
US4977492A · kind A · utility
24Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter controller adjusts a selected switching pattern to accommodate minor variations and loads in the neighborhood of that pattern. The controller realizes in real-time the equivalent of an iterative solution of predetermined patterns. A number of representative pulse width modulated (PWM) patterns are selected for a range of loads and link ripple. A portion of the fundamental output is inserted onto the d.c. link to control one or more higher harmonics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.