Shell-form transformer in a battery powered impact device
US5107390A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Nov 30, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shell-form transformer for charging an energy storage device contained in a battery powered impact device. The primary and secondary windings of the transformer are wound in a predetermined manner around the center leg of a core which has an air gap therein. The gap increases the reluctance of the center leg which decreases the flow of magnetic flux through the core which, in turn, enables the current applied to the transformer primary to be increased without causing the core to be saturated. As a result, the current applied to the transformer primary can be increased, thereby increasing the output voltage supplied from the transformer secondary which, in turn, enables rapid charging of the energy storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.