Pump motor and motor control

Details Pump motor and motor control Pump motor and motor control

F - Mech Eng,Light,Heat,Weapons

04

C

F04C 15/00 (2006.01) F04C 11/00 (2006.01) A61M 1/16 (2006.01) H02P 8/14 (2006.01)

Patent

CA 2172453

A pump motor controller for making pump motor speed independent of fluid pressure at the inlet and outlet of the pump. A first embodiment employs feedback to cause pump motor speed to converge to a desired speed established with a reference input signal. Based on this feedback, forward and reverse drive amplifiers in the first embodiment cause the pump motor speed to track the desired speed. A second embodiment employs a controller that produces drive signals to a stepper motor in proportion to a reference frequency. The controller and stepper motor in the second embodiment achieve speed control at low speeds without the use of a feedback control loop.

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