Method and apparatus for monitoring a resolver in a torque machine

US9566985B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Wei D. Wang · Troy, US
• Bon Ho Bae · Torrance, US
• Leah Dunbar · Brighton, US
• Kevin P. Houle · Flint, US
• William R. Cawthorne · Milford, US
• Andrew M. Zettel · Ann Arbor, US
• Hanne Buur · Brighton, US
• Steven E. Schulz · Torrance, US

Key dates

• Filing date: Feb 8, 2011
• Grant date: Feb 14, 2017
• Expiry date: Sep 7, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/72
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A method for monitoring an electrically-powered torque machine configured to generate torque in a hybrid powertrain system includes monitoring signal outputs of a resolver configured to monitor rotational position of the torque machine. Upon detecting a fault warning state associated with the signal outputs of the resolver, a motor torque capacity of the torque machine is derated. Upon a clearing of the fault warning state, a torque ramp-up state to increase the motor torque capacity of the torque machine is executed. Notice of an incidence of a fault associated with the signal outputs of the resolver is provided only when the motor torque capacity fails to achieve a threshold motor torque capacity within a threshold recovery time period while executing the torque ramp-up state.