Regulation of current or voltage with PWM controller
US5691628A · kind A · utility
18Cited by
16References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Mar 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/293
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for providing a periodic output having a regulated magnitude is derived from a periodic input source. A switch is serially connected to the input for periodically sampling the input at a sampling frequency which is much higher than the frequency of the periodic input, while the duty ratio of the sampling is modulated as an inverse function of the output magnitude. The pulse train of samples is filtered to remove the sampling frequency and its harmonics and the result is a regulated output which replicates the input waveform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.