US 12,341,453 B2
Systems and methods for regulating electric motor output
Justin Michael Magyar, Troy, OH (US); Howard Richardson, Tipp City, OH (US); and Nathan Eric Snell, Tipp City, OH (US)
Assigned to Regal Beloit America, Inc., Milwaukee, WI (US)
Filed by Regal Beloit America, Inc., Beloit, WI (US)
Filed on Jul. 7, 2022, as Appl. No. 17/859,949.
Prior Publication US 2024/0014760 A1, Jan. 11, 2024
Int. Cl. H02P 23/26 (2016.01)
CPC H02P 23/26 (2016.02) 22 Claims
OG exemplary drawing
 
1. An electric motor for a pump, the electric motor comprising:
an alternating current (AC) line-in node for receiving AC power supplied to the electric motor;
a current sensor coupled to the AC line-in node and configured to measure current supplied to the electric motor; and
a motor controller configured to convert the AC power supplied to a variable frequency variable voltage power for driving the electric motor at a normal output value, the motor controller comprising:
a microcontroller coupled to the current sensor and configured to regulate the variable frequency variable voltage power without using an inductor or a transformer for power factor correction by:
receiving a measured value of the current supplied to the electric motor, wherein a decrease in power factor of the electric motor from increased load results in an increase in the current supplied to the electric motor;
determining the measured value is above a threshold; and
transmitting a control signal representing a reduced output value; and
an inverter configured to receive the control signal and generate the variable frequency variable voltage power to reduce output from the electric motor according to the reduced output value, thereby increasing the power factor of the electric motor.