Motor current status sensor

Details Motor current status sensor Motor current status sensor

1997-07-25

1998-11-24

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 318490, 318772, 388808, B60C 2300

Patent

active

058413588

ABSTRACT:
A method and circuit design for establishing the operating status of a direct drive, multiple speed motor. More specifically, the invention furnishes a method for providing feedback to an air distribution system indicating first whether the system motor is operating and second which speed winding has been selected. The circuit design 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 will determine whether a light emitting diode (LED) illuminates. The illumination of the LED indicates to the system controller whether the motor is operating and the speed winding that has been selected, thus providing the necessary feedback to the air distribution system controller.

REFERENCES:
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patent: 4558306 (1985-12-01), Freliech
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patent: 4762463 (1988-08-01), Yang
patent: 4841188 (1989-06-01), Hao
patent: 5049801 (1991-09-01), Potter
patent: 5170110 (1992-12-01), Vlasak

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