Barrett Technology, Inc.

Brian Zenowich

William T Townsend

Donald E Drumm

Amy A Blank

David Wilkinson

Claude F Valle, Iv

Christopher Woodall

Thomas Nadovich

James Patton

Arvind Ananthanarayanan

Adam Crowell

Traveler Hauptman

Alexander Jenko

Julian Leland

Michael Schiess

Vitaliy Krutik

Burt Doo

Claude Valle

Michael Morin

Peter Botticelli

Darren Landino

John Lawson

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.

Apparatus for connecting a motor controller to an electrical motor, said apparatus comprising:

Method and apparatus for connecting an ultracompact, high-performance motor controller to an ultracompact, high-performance brushless DC motor

A robotic device has a base and at least one finger having at least two links that are connected in series on rotary joints with at least two degrees of freedom. A brushless motor and an associated controller are located at each joint to produce a rotational movement of a link. Wires for electrical power and communication serially connect the controllers in a distributed control network. A network operating controller coordinates the operation of the network, including power distribution. At least one, but more typically two to five, wires interconnect all the controllers through one or more joints. Motor sensors and external world sensors monitor operating parameters of the robotic hand. The electrical signal output of the sensors can be input anywhere on the distributed control network. V-grooves on the robotic hand locate objects precisely and assist in gripping. The hand is sealed, immersible and has electrical connections through the rotary joints for anodizing in a single dunk without masking. In various forms, this intelligent, self-contained, dexterous hand, or combinations of such hands, can perform a wide variety of object gripping and manipulating tasks, as well as locomotion and combinations of locomotion and gripping.

Intelligent, self-contained robotic hand

Growing community of inventors

Wayland, MA, United States of America

Brian Zenowich