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

Claim 0:
1. A motor control system comprising:
a direct current (DC) motor including a rotor induced to rotate in response to a drive current generated by a supply voltage, the rotation of the rotor generating a mechanical force that drives a component;
a ripple count circuit including an active filter circuit and a parasitic pulse cancellation circuit; and
a pulse width modulation, “PWM” circuit in signal communication with the parasitic pulse cancelation circuit, the PWM circuit configured to generate a PWM signal based on the rotational direction of the rotor,
wherein the active filter circuit is configured to filter the drive current and to generate a pulsed signal,
wherein the parasitic pulse cancelation circuit is in signal communication with the ripple count circuit to receive the pulsed signal and generates a ripple count signal that excludes parasitic pulses included in the pulsed signal having a parasitic voltage level that exceeds a voltage level of a voltage threshold,
wherein the parasitic pulse cancelation circuit actively adjusts the voltage level of the voltage threshold based at least in part on a rotational direction of the rotor, and
wherein the parasitic pulse cancelation circuit actively adjusts the voltage level of the voltage threshold based at least in part on the PWM signal.