Phase-controlled voltage regulator
US4093908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Sep 13, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/445
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and apparatus for regulating the RMS voltage applied to a load from an AC source having a peak-to-peak amplitude which varies within a predefined range. The apparatus comprises a waveform generator for producing a predefined periodic waveform, a comparator circuit for comparing such waveform with the sinusoidal waveform of the source whereby a signal is produced each time the algebraic difference between the instantaneous values of the compared waveforms changes sign, and a switching circuit responsive to the comparator circuit output for interrupting the voltage applied to the load at the start of each cycle or half-cycle. The shape of the waveform produced by the waveform generator is such that the desired RMS voltage appearing at the output terminals is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.