Uninterruptible power supply with passing neutral, comprising a twin step-up chopper
US5654591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1994 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Nov 21, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/458
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An uninterruptible power supply, with passing neutral, comprises a twin step-up chopper whose input is connected to a battery and to a rectifier circuit connected to the mains power system. The twin step-up chopper comprises a positive step-up chopper supplying a first output voltage between a positive DC output and neutral, and a negative step-up chopper supplying a second output voltage between a negative DC output and neutral. The control circuit of the twin step-up chopper comprises means for regulating imbalance between the output voltages of the positive and negative step-up choppers, suitable both for operation on the mains power system and for operation on the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.