Variable flux-reset ferroresonant voltage regulator
US3988662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1974 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Dec 13, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/13
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A thyristor controlled ferroresonant voltage regulator in which the output voltage is made adjustable by varying the reset flux level of each of two parallel magnetic core paths upon which the load windings are wound. Decoupling from the alternating current source is provided by a separate inductor. The two core paths are decoupled by magnetic shunts, which provides an inductance which may be designed to obtain a soft commutation characteristic for the ferroresonant capacitor. During one half cycle of the output waveform one thyristor is enabled by an associated control circuit to complete a circuit path for the resonant capacitor through a winding on the second magnetic core path, while the flux in the first magnetic core path is clamped; in the second half cycle, another thyristor is enabled at a time determined by the control circuit, to complete a circuit path for the capacitor through a winding on the first magnetic core path while the flux in the second magnetic core path is clamped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.