Amperage control for protection of battery over current in power tools
US7133601B2 · kind B2 · utility
1,495Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2004 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | Nov 30, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/937
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Amperage control of a power tool motor is provided by pulse width modulation of current from a power supply. The pulse width modulation may be varied according to the determined motor current and measured power supply voltage. The power supply preferably includes a battery, such a lithium ion or nickel cadmium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.