Variable speed motor drive

Details Variable speed motor drive Variable speed motor drive

G - Physics

06

F

341/109

G06F 11/30 (2006.01) H01H 47/00 (2006.01)

Patent

CA 2033851

VARIABLE SPEED MOTOR DRIVE ABSTRACT OF THE DISCLOSURE A motor drive having a sensing input for sensing fault conditions and a speed control input for receiving a speed control signal. The variable speed motor drive is suitable for being powered by a power supply coupled to a supply input and controls motor speed in a variable speed motor based on the speed control signal such that the motor speed corresponds to the level of the speed control signal. The disclosed motor drive includes a power interrupter, coupled between the supply input and the variable speed motor, for controllably interrupting power to the motor as well as a drive controller coupled to the motor drive for monitoring the sensing input and causing the power interrupter to interrupt power when a fault condition occurs. The 'drive also provides that speed control signal to the speed control input at a level which stops the motor when a fault condition occurs.

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