Adjustable voltage power supply
US3938031A · kind A · utility
11Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 3, 1974 |
| Grant date | Feb 10, 1976 |
| Priority date | — |
| Expiry date | Sep 3, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An adjustable voltage alternating current power supply is provided which is especially suitable for supplying loads of variable resistance. The power supply consists of a transformer having two secondary windings with solid-state switches for alternatively connecting the secondary windings in either parallel or series, and with a firing control circuit for changing the connection of the windings from parallel to series at a predetermined point in each half-cycle of the voltage to adjust the effective output voltage so that constant output power can be maintained, or the output power can be varied in any desired manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.