Stromzustandanzeiger für einen Motor

摘要

A method and circuit (10) for establishing the operating status of a direct drive, multiple speed motor (13), the method including providing feedback to an air distribution system for indicating first whether the system motor is operating and secondly which speed winding has been selected, wherein the circuit senses the voltage differences between the speed windings (20, 22) of the motor and also between the high speed motor winding (22) and the power supply (25), the voltage differences sensed by the circuit determining whether a first light emitting diode (32) is illuminated, the illumination of the first light emitting diode indicating to the system controller whether the motor is operating and whether a second light emitting diode (38) is illuminated, indicating to the controlled which speed winding has been selected, thus providing the necessary feedback to the controller of the air distribution system.