Unilateral diac for motor speed control
US5247230A · kind A · utility
5Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Jun 2, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/937
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A universal diac is provided for implementation in controlling an SCR in a motor speed control circuit. The diac is provided with dissimilar interconnections between the emitters and base, such that the device operates as a standard diac in one mode of operation, and as a zener diode in an opposite mode of operation. The zener characteristics are achieved by the implementation of a shorted base configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.