Patent ID: 11923850
Assignee: INTEVA PRODUCTS, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method of controlling a motor control system, the method comprising:
generating a drive current using a supply voltage and delivering the drive current to a direct current (DC) motor;
rotating a rotor of the motor in response to the drive current;
generating a mechanical force in response to rotating the rotor to drive a component;
filtering the drive current using an active filter circuit and generating a pulsed signal based on the filtered drive current;
generating a pulse width modulation, (PWM) control signal indicative of a rotational direction of the rotor, and delivering the PWM signal to a PWM circuit included in a parasitic pulse cancelation circuit;
generating a PWM signal using the PWM circuit, wherein the PWM signal is generated based at least in part on the rotational direction of the rotor;
comparing, by the parasitic pulse cancelation circuit, a parasitic voltage level of the pulsed signal to a voltage level of a voltage threshold;
actively adjusting the voltage level of the voltage threshold using the parasitic pulse cancelation circuit based at least in part on the PWM signal; and
delivering the pulsed signal to the parasitic pulse cancelation circuit and generating a ripple count signal that excludes parasitic pulses included in the pulsed signal that have the parasitic voltage level that exceeds the voltage level of the voltage threshold.