Self-controlled variable inductor with air gaps
US4620144A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1985 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | May 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/879
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric power apparatus, namely a variable inductor comprising a magnetic core provided with a center limb and two outer limbs all having first and second ends. The first ends are interconnected through a first common point of the magnetic core, and the second ends through a second common point of this core. Two primary windings disposed respectively around the two outer limbs are connected in series and supplied with an alternating current, while two control windings also connected in series are respectively superposed to the two primary windings. The alternating current of the primary windings is rectified through a diode bridge for supplying with direct current the control windings. The direction of the different windings along with their interconnections are selected so that the alternating and direct currents induce in one of the two outer limbs alternating and direct current magnetic fluxes which assist each other or which are in opposition and in the other of these two limbs alternating and direct current magnetic fluxes which are in opposition or which assist each other, respectively, depending on the positive or negative value of the alternating current. Each outer lim…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.