High efficiency, no dropout uninterruptable power supply
US5635773A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Aug 23, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to the present invention, a high efficiency no-dropout uninterruptible power supply is presented which will provide desired UPS characteristics while reducing or eliminating undesirable characteristics. In particular, simultaneous improvements are achieved in the areas of switchover transfer response time, droop and transients, EMI generation, power efficiency and heat generation, size, weight, ease of waveshaping, and powerline frequency sensitivity. The invention utilizes dual concurrent feedback loops to control utility-backup power transfer and incorporates a novel method of synchronized AC output generation which allows zero-power switching and simple high-frequency waveshaping control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.