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US 11,901,855 B2Granted
Polyharmonic flux motor loss increase
AssigneeRockwell Automation Technologies, Inc.
InventorsJacob Lamb, Zhendong Zhang
Life of this patent
Estimating the term…
Abstract
For polyharmonic flux motor loss increase, a method offsets pulse width modulation (PWM) carriers to a motor to increase motor harmonics. The offset PWM carriers increase energy losses for the motor.
Claims17
A method comprising:
- offsetting pulse width modulation (PWM) carriers to a motor to increase motor harmonics, wherein the offset PWM carriers increase energy losses for the motor;
- and
- concurrently injecting a high-frequency signal into a motor control signal for the motor, wherein the high-frequency signal is a sine wave with a non-fundamental motor frequency, and wherein the high-frequency signal is a function of a motor frequency and the combination of increased motor harmonics and the high-frequency signal increases the energy losses for the motor.
An apparatus comprising:
- a processor executing code to perform:
- offsetting pulse width modulation (PWM) carriers to a motor to increase motor harmonics, wherein the offset PWM carriers increase energy losses for the motor, and wherein the increased energy losses enable increased motor braking torque at a given bus voltage.
A computer program product comprising a non-transitory computer readable storage medium having code embodied therein, the code readable/executable by a processor to perform:
- offsetting pulse width modulation (PWM) carriers to a motor to increase motor harmonics, wherein the offset PWM carriers increase energy losses for the motor, and wherein the offset PWM carriers generate Rayleigh loops.
Dependencies are inferred from the claim text.