Solid-state alternating current (AC) switch
US8446050B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 2009 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Jun 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/6874
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A solid-state alternating current (AC) switch provides for the sequential turn-on of the associated solid-state switches to reduce the generation of electromagnetic interference (EMI). The solid-state AC switch includes at least first and second solid-state switches connected in series between an AC input and an AC load. A zero-cross detector circuit monitors the AC input to determine zero-crossings associated with the monitored AC input. A controller turns on the first solid-state switch and the second solid-state switch according to a turn-on sequence in which the first transistor is turned ON during a detected zero-crossing window associated with the first transistor and the second transistor is subsequently turned ON during a detected zero-crossing associated with the second transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.