Patent ID: 6750622
Filing Date: 2004-06-15
Classification: A01D,B60L,Y02T,Y10S

Abstract:
A motor controller system for dc-powered motors comprised of a dc power source, a motor and corresponding circuit, said motor control system being effective to maximize motor efficiency and extend the life of said dc power source, and comprising:a. a current sensor device which measures the current of said motor and the rate of change of said current and generates a corresponding voltage signal; b. a programmable input/output processor which receives as input said current sensor voltage signal and a voltage signal from the dc power source for said motor, compares one or more of said voltage signals to at least one corresponding control parameter, and, based upon said comparison, generates a control signal which is comprised of the duty cycle of a pulse width modulation signal; and c. a switching mechanism which receives said control signal and, based on said control signal, periodically interrupts said motor current and thereby makes adjustments to the operational parameters of said motor, said control signal further triggering an interrupt service routine which synchronizes the routine of said current sensor device and processor so that said routines occur after a fixed delay from completion of the routine of said switching mechanism.