Dimmer with zero crossing detector and method of controlling a dimmer
US10813188B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2019 |
| Grant date | Oct 20, 2020 |
| Priority date | — |
| Expiry date | Nov 14, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimmer structured to be connected to a power source via a hot conductor and to a load via a load conductor includes a zero-crossing detector structured to generate a zero-crossing signal that that has a high state or a low state and changes states in response to a voltage between the hot conductor and the load conductor reaching or leaving zero volts only during a positive half-cycle of power received from the power source, a processing unit structured to receive the zero-crossing signal and to generate a triac control signal based on the zero-crossing signal, and a triac control unit including a triac and being structured to electrically connect between the hot conductor and the neutral conductor and to turn on and turn off the triac based on the triac control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.