Uninterruptible power supply apparatus and power path transfer method
US4782241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Aug 11, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J9/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An uninterruptible power supply capability is provided for line regulators of a variety synthesizing a desired waveshape for presentation to a critical load. A static switch is active intermediate the input of the line regulator and the line power supply to provide a power path during normal operation. Upon the occurrence of a line defect, a stand-by power path is provided which includes a source of d.c. stand-by energy such as rechargeable batteries which supply input to an unregulated inverter which, in turn, provides an unregulated input through an inductance to the input of the line regulator. Transfer is achieved by preliminary voltage level adjustment at the inverter and the inverter itself is employed to assure commutation off of the switching components of the static switch. Detection of line fault is made by detecting any instantaneous phase shift in the line input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.