SERVO MOTOR CONTROLLER USING POSITION INTERPOLATION

摘要

A motor control system employing a single Hall sensor (2) providing a position feedback signal to a control circuit (10) is disclosed. The control circuit includes a tach counter circuit (12), a ramp mode circuit (14), an interpolation circuit (16), and a commutation logic circuit (18). Drive signals are output to the motor windings by the commutation logic circuit (18). The control state defining the drive signals is advanced on the basis of the estimated rotor position. The estimate of the rotor position is determined by linearly interpolating between Hall signal transitions.