| 摘要 |
A method and circuit for establishing the operating status of a direct drive, multiple speed motor, 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 of the motor and also between the first speed motor winding and the power supply, the voltage difference sensed by the circuit determining whether a light emitting diode (LED) illuminates, the illumination of the LED indicating to the system controller whether the motor is operating and the speed winding that has been selected, thus providing the necessary feedback to a controller of the air distribution system. |
