Contactless sensing of a fluid-immersed electric motor

US10160276B2 · kind B2 · utility

Assignee

• ClearMotion, Inc. · US

Inventors

• Clive Tucker · Boston, US
• Vladimir Gorelik · Medford, US
• Jonathan R. Leehey · Wayland, US
• Robert Driscoll · Derry, US
• Colin Patrick O'Shea · Cambridge, US
• Johannes Schneider · Kirchlengern, DE
• Ross J. Wendell · Medford, US
• Tyson David Sawyer · Mason, US

Key dates

• Filing date: Apr 1, 2014
• Grant date: Dec 25, 2018
• Expiry date: Dec 5, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P6/16
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method and system for measuring rotor position or velocity in an electric motor disposed in hydraulic fluid. The system comprises a contactless position sensor that measures electric motor rotor via magnetic, optical, or other means through a diaphragm that is permeable to the sensing means but impervious to the hydraulic fluid. An electronic sensor is positioned outside the operating fluid, whereas the motor is located in the fluid volume.