Portable power unit
US5444592A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1994 |
| Grant date | Aug 22, 1995 |
| Priority date | — |
| Expiry date | Sep 15, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/062
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A portable power unit has a protective circuit for cutting off an output current from the power unit when the power unit is in an overload state. An amount of the output current is detected. An output voltage from the power unit is reduced when the amount of the output current detected reaches a first threshold value, thereby preventing the protective circuit from undesirably operating for one power unit when it is connected for another for parallel operation. When the amount of the output current decreases to a second threshold value which is smaller than the first threshold value, with the power unit being in a state in which the output voltage is reduced, the voltage-reducing operation is canceled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.