US 11,949,362 B2
Power tool including conduction angle control
Shuvam Gupta, Wauwatosa, WI (US); Gerry M. Nagel, Sussex, WI (US); and Alexander T. Huber, Menomonee Falls, WI (US)
Assigned to Milwaukee Electric Tool Corporation, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Apr. 22, 2022, as Appl. No. 17/727,315.
Claims priority of provisional application 63/179,824, filed on Apr. 26, 2021.
Prior Publication US 2022/0345057 A1, Oct. 27, 2022
Int. Cl. H02P 6/182 (2016.01); H02K 7/14 (2006.01); H02K 11/33 (2016.01)
CPC H02P 6/182 (2013.01) [H02K 7/145 (2013.01); H02K 11/33 (2016.01)] 17 Claims
OG exemplary drawing
 
1. A power tool, comprising:
a motor;
a power switching network configured to drive the motor; and
a motor controller in communication with the power switching network and including an electronic processor and a memory, and the motor controller configured to:
receive a desired speed signal,
monitor a speed of the motor,
generate an error value signal between the desired speed signal and the monitored speed, wherein the error value signal is a linear signal,
determine a conduction angle signal based on the error value signal using a piecewise polynomial function, wherein the conduction angle signal is a non-linear signal,
determine whether the conduction angle signal is greater than the error value, and
increase a conduction angle output by the power switching network in response to the conduction angle signal being determined to be greater than the error value.