CPC B25F 5/00 (2013.01) [B25F 5/008 (2013.01); B25F 5/02 (2013.01)] | 30 Claims |
1. A power tool comprising:
a battery pack interface configured to receive a battery pack that is removably coupled to a housing of the power tool, the battery pack having a nominal voltage of 18 Volts to 36 Volts;
a brushless direct-current (“BLDC”) motor, the BLDC motor having an outer diameter of 50 millimeters to 80 millimeters and a weight of 336.5 grams to 720 grams;
a switching array including a plurality of switching field effect transistors (“FETs”) electrically connected between the BLDC motor and the battery pack interface, the plurality of switching FETs configured for controlling application of power to the BLDC motor, wherein the plurality of switching FETs have a drain-to-source resistance of below 3 milli-Ohms;
a controller configured to generate a control signal to selectively enable and disable the plurality of switching FETs in the switching array to drive the BLDC motor with power provided from the battery pack; and
an output shaft coupled to the BLDC motor to provide an output of the power tool, wherein when powered by the battery pack
the power tool is configured to produce a maximum short-duration power output of at least 600 Watts and an average long-duration power output, throughout a discharge cycle of the battery pack, of at least 400 Watts, and
a ratio of Ampere-hours (Ah) discharged by the battery pack for providing the average long-duration power output to length of run in seconds (s) of the average long-duration power output is at least 0.0072Ah:1 s.
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