Zero deadband four-quadrant full-wave converter
US3944907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1974 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Sep 9, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/757
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A four-quadrant full-wave static converter having improved time response without current cross-over deadband. An alternating current wave is imposed on the direct current input signal, which generates gate pulses for appropriate thyristors at the desired firing angle. The applied alternating current signal can be of approximately the same magnitude as the converter deadband, so as the direct current signal varies from zero a portion of the control signal moves out of the deadband area. For fast response the magnitude of the alternating current signal can be greater than the deadband signal. As the magnitude of the direct current signal increases the relative magnitude of the alternating current signal is decreased, preventing a large DC component from being imposed on the supply during high current operations. Cycling of the imposed alternating current waves is synchronized with the firing angle point O to maintain system protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.