Power tool with electric motor and auxiliary switch path
US10469006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2018 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Jul 12, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power adapter for use with a power tool having an electric motor, and configured to supply electric power from an alternating current power supply to the power tool, is provided. The adapter includes a housing and an auxiliary capacitor circuit housed within the housing. The auxiliary capacitor circuit includes an auxiliary capacitor, a switch in series with the auxiliary capacitor, and a switch control circuit. A state of the switch creates either a charging path for the auxiliary capacitor or both the charging path and a discharging path for the auxiliary capacitor, and the switch control circuit is configured to detect voltage associated with the power supply or the power tool and to control state of the switch in accordance with magnitude of the detected voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.