CPC H02K 7/14 (2013.01) [H02K 7/145 (2013.01); H02K 9/00 (2013.01); H02K 9/227 (2021.01); H02K 11/215 (2016.01); H02K 11/33 (2016.01); H05K 7/209 (2013.01)] | 15 Claims |
9. A power tool comprising:
a tool housing;
a brushless DC (BLDC) motor disposed within the tool housing, the BLDC motor including a stator assembly and a rotor assembly rotatably interacting with the stator assembly; and
a power module for driving the BLDC motor, comprising:
a power circuit board having a central through-hole;
a plurality of power switches operatively connected to the BLDC motor disposed on a first surface of the power circuit board around the central through-hole;
a positional sensor board mounted on a second surface of the power circuit board facing the BLDC motor, the positional sensor board having a main body formed around the central through-hole;
a plurality of positional sensors mounted on the positional sensor board facing the BLDC motor; and
a planar heat sink in surface contact with the second surface of the power circuit board.
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