Amperage control for protection of battery over current in power tools
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United States of America Patent
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Oct 2, 2007
Grant Date -
Jan 25, 2007
app pub date -
Sep 29, 2006
filing date -
Feb 18, 2003
priority date (Note) -
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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 may include a battery such as lithium ion or nickel cadmium.
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