Control Unit For a Power Tool
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United States of America Patent
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app pub date -
Oct 10, 2017
filing date -
Jun 14, 2010
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Abstract
A power tool is provided including a housing, a brushless DC motor housed inside the housing, and a control unit housed inside the housing for controlling an operation of the brushless DC motor. The control unit includes a potting boat having an open portion, a circuit board received within the potting boat through the open portion, power switching elements mounted on the circuit board, a potting compound receiving within the potting boat to substantially surround the circuit board, and a heat sink in thermal communication with the power switching elements. The heat sink has a surface exposed outside the potting compound through the open portion of the potting boat.
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