MOTOR CONTROLLER FOR ELECTRONIC COMMUTATOR DIRECT-CURRENT MOTOR FOR COMPENSATION FOR REDUCTION IN TORQUE

摘要

PROBLEM TO BE SOLVED: To prevent torque reduction even with different motor loads by deriving the duration and/or amplitude of additive current pulse and/or voltage pulse from motor load. SOLUTION: The duration and/or amplitude of additive current pulses is variable, and derived from motor load. A motor controller controls a motor through so-called pulse width modulation(CPWM or PWM) of control pulses. A motor load can be derived from the on-off ratio of digital motor control signals CPWM. Control signals S are derived from the signals CPWM by means of an integrator 2. PWM control signals are supplied to a PWM output means in order to supply individual motor windings with motor current. This makes it possible to avoid torque reduction even with different motor loads.