Unico Corp.

Michael O Lucas

Thomas L Beck

Ronald G Peterson

Michael A MacDonald

Mark E Garlow

Michael D Dry

William S Hammel

Harry W Schulz

Rick L Tennessen

James J Sewell

An apparatus is provided for controlling operation of an electric motor through use of an additional power storage arrangement connected across the DC busses of a motor drive and controlling the speed of the motor. The additional power storage arrangement includes an additional capacitor arrangement and a rate limiting arrangement in a series circuit relationship with one another.

Apparatus for continued operation of an electric motor during an interruption in input power

A system and method are provided for controlling the speed of a motor driving a load that is electrically connected to a generator driven by an engine, through use of a first control feedback loop configured to control the rotor flux of the motor by controlling the field excitation of the generator, and a second control feedback loop configured to control the speed of the motor by controlling the throttle position of the engine.

Induction motor torque control in a pumping system

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Franksville, WI, United States of America

Michael O Lucas