High power electric generator, especially adapted for powering processes involving discharge in a rarified atmosphere
US4446560A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1981 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Dec 16, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/5157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high power generator for an ion discharge device used for the thermal treatment of metals in a rarified gaseous atmosphere. A variable width pulse generator is used to vary the input power to an inductance means. The frequency of the input pulses is held constant, while the pulse width is varied. An arc protection circuit is provided to sense and prevent an incipient arc across the secondary of the transformer. The arc protection circuit includes a voltage detector and a current detector with logic means to sense an under voltage-over current condition that presages the beginning of an arc. A second embodiment is disclosed which uses two circuits in parallel to drive the ion generator. One circuit is charged while the other is discharged. A third embodiment is disclosed which was a thyristor network for selectively loading the primary circuits of a pair of inductance circuits in response to an inductance-capacitance time constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.