Barrett Technology, Inc.

Amy A Blank

Donald E Drumm

William T Townsend

Brian Zenowich

Claude F Valle, Iv

Christopher Woodall

Thomas Nadovich

James Patton

Arvind Ananthanarayanan

David Wilkinson

Alexander Jenko

Julian Leland

Michael Schiess

Claude Valle

Michael Morin

A motor controller for controlling the operation of a three-phase permanent magnet synchronous electric motor, wherein the three-phase permanent magnet synchronous electric motor is characterized by three phases A, B, C, and further wherein the three-phase permanent magnet synchronous electric motor is driven by regulating three phase currents i, iand ifor the three phases A, B, C, respectively, the motor controller comprising: a three-phase power supply for supplying the three phase currents i, iand i; a first sensor for sensing the phase current i; a second sensor for sensing across the phase currents iand i; and a microcontroller for controlling the operation of the three-phase power supply so as to produce the three phase currents i, iand ineeded to operate the three-phase permanent magnet synchronous electric motor, wherein the microcontroller reads the outputs of the first sensor and the second sensor and adjusts operation of the three-phase power supply so as to produce phase currents i, iand iwhich produce the desired torque in the three-phase permanent magnet synchronous electric motor.

High performance current sensing architecture for brushless motors

A robotic device for operation in association with an appendage of a user, wherein the appendage of the user has an endpoint, the robotic device comprising: a base; and a robotic arm attached to the base and having an end-point, the robotic arm having at least two active degrees of freedom relative to the base and being configured so that when the base is appropriately positioned relative to a user, the reference frame of the robotic device is oriented generally similarly to the reference frame of the user and motions of the endpoint of the appendage of the user are mimicked by motions of the endpoint of the robotic arm.

Multi-active-axis, non-exoskeletal rehabilitation device

A motor controller for controlling the operation of a three-phase permanent magnet synchronous electric motor, wherein the three-phase permanent magnet synchronous electric motor is characterized by three phases A, B, C, and further wherein the three-phase permanent magnet synchronous electric motor is driven by regulating three phase currents i, iand ifor the three phases A, B, C, respectively, the motor controller comprising: a three-phase power supply for supplying the three phase currents i, iand ia first sensor for sensing the phase current i; a second sensor for sensing across the phase currents iand i; and a microcontroller for controlling the operation of the three-phase power supply so as to produce the three phase currents i, iand ineeded to operate the three-phase permanent magnet synchronous electric motor, wherein the microcontroller reads the outputs of the first sensor and the second sensor and adjusts operation of the three-phase power supply so as to produce phase currents i, iand iwhich produce the desired torque in the three-phase permanent magnet synchronous electric motor.

Growing community of inventors

Brighton, MA, United States of America

Amy A Blank