Patent Number: 7,133,601

Title: Amperage control for protection of battery over current in power tools

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.

Inventors: Phillips; Alan (Jackson, TN), Jones; Julie L. (Jackson, TN)

Assignee: Black & Decker Inc.

International Classification: H02P 7/06 (20060101)

Expiration Date: 2019-11-07 0:00:00