Controller for brush-less motors and a conveyor system having the controllers

摘要

Object of the present invention is to distribute signals indicating angular position of a rotor from a controller for a brush-less motor to another control device.A controller for driving a brush-less motor has a magnetic-pole detecting circuit (9) that receives from a Hall-effect semiconductor disposed in a motor roller (4) sequential (pole position-representing) signals relating to a rotor's position. These signals are converted into pulses and then supplied to a current-controlling circuit (8), so that currents to stators are controlled based on the signals from the detecting circuit (9) so as to drive the motor roller. A sequencer (20) supplies to a controlling circuit (7) "ON/OFF" and other commands, that are then processed in this circuit and fed to the current-controlling circuit (8) for driving the motor. A pulse generator (19) receives from the semiconductor the pole position signals and convert them into pulses, that are then output to an external terminal (11a) from which they are sent to a superordinate external controller, so that the latter can receive rotation data from the brush-less motor controller.