Load control device for high-efficiency loads
US10128772B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2018 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Apr 6, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A load control device for controlling power delivered from an AC power source to an electrical load includes a thyristor, a gate coupling circuit for conducting current through a gate terminal of the thyristor, a controllable switching circuit coupled between first and second main terminals of the thyristor, and a control circuit for controlling the gate coupling circuit to conduct a pulse of current through the gate terminal to render the thyristor conductive at a firing time during a half cycle. The gate coupling circuit is able to conduct at least one other pulse of current through the gate terminal after the firing time until a transition time before an end of the half-cycle. The control circuit is configured to render the controllable switching circuit conductive to conduct current through the electrical load between approximately the transition time until approximately the end of the half-cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.