Alternating polarity power supply control apparatus
US4319182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Apr 18, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/293
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electronic switching circuit is provided for controlling transfer of electrical power from an alternating polarity electrical power supply to a load means through use of a field-effect transistor device as the controlling element. A circuit arrangement is provided for switching into the "on" condition primary power control field-effect transistor device only when the voltage thereacross is at a relatively low value and for switching into the "off" condition this device in a gradual manner, relatively slowly reducing currents flowing therethrough. A circuit arrangement for a command source directing operation of the primary power transfer control field-effect transistor device provides command source isolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.