Conversion and control of electrical energy by electromagnetic induction
US4020440A · kind A · utility
Inventor
Key dates
| Filing date | Nov 25, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Nov 25, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In this pioneering invention, electrical energy in alternating or direct current form at any selected power, voltage, current, or frequency, within wide limits, is converted and controlled to other forms of electrical energy at uniformly and continuously controlled output waveform and voltage or current by means of progressive variation of magnetic flux in associated magnetic paths. For electrical energy regeneration, this invention relies on electromagnetic induction in windings surrounding variable permeance magnetic paths of ferrimagnetic or ferromagnetic materials. The controlling means rely upon progressive saturation and/or domain rotation for selected portions of the magnetic paths to yield a uniformly controllable permeance within the magnetic paths. Feedback techniques are used to stabilize the output and provide the means for external control of power output in combination with a reference source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.