Nidec Motor Corporation

Pranesh Rao

Bret S Clark

John G Schrader

Eric Coupart

James D Ellis, Ii

Timothy R Albers

Thomas Schardt

Parijat Shrivastava

A dual motor system includes a first motor providing a lower speed range and a second motor providing a higher speed range, wherein the motors are coaxially arranged and aligned on and drive a common shaft, and a motor control system controlling the speed of the first motor and engaging the second motor as needed. The first motor is a variable speed motor providing a lower two-thirds of a full speed range, and the second motor is an induction motor providing the upper one-third in the form of one or more discrete fixed speeds. The system may include a transformer including a first winding tap which provides a first higher speed, and a second winding tap which provides a second higher speed. The system may also include a flow control system for automatically controlling the speed of the motors for particular applications, such as flow control in a pool.

Dual motor system with flow control

Motor sensor module

Growing community of inventors

Chesterfield, MO, United States of America

Pranesh Rao