Zero-crossing detector for industrial control with low heat dissipation
US8669787B2 · kind B2 · utility
2Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 2012 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | May 17, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An I/O circuit for use with an industrial controller provides a zero-crossing detector circuit with low power dissipation through the use of a zero-crossing circuit that activates a light emitting diode of a photo coupler only for a very brief period of time at the zero-crossing (as opposed to at all times other than the zero-crossing). The circuit is coupled with a power supply circuit that uses a reactive element for voltage dropping as opposed to a resistive voltage drop element further reducing power consumption possible with the low power consumption of the photo coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.