Gm Global Technolgoy Operations, Inc.

Michael Milani

Yo Chan Son

Steven E Schulz

Silva Hiti

James Michio Nagashima

Milun Perisic

Nitinkumar R Patel

Gabriel Gallegos-Lopez

Bon Ho Bae

Dang Dinh Dang

Sean E Gleason

Seung Ki Sul

Erik Christopher Hatch

Rolf Blissenbach

David L Schauer

Yu-Seok Jeong

John Wattleworth

A stator includes a stator core, a plurality of slots, and a conductor. The plurality of slots are formed within the stator core. The conductor is disposed continuously within at least two of the plurality of openings.

Stators with improved conductor assembly and method of making same

Methods and apparatus are provided for startup of a permanent magnet alternating current (AC) motor. The method comprises the steps of detecting startup of the permanent magnet AC motor; detecting a mechanical oscillation of the permanent magnet AC motor when startup of the permanent magnet AC motor is detected; and, in response to detection of the mechanical oscillation of the permanent magnet AC motor when startup is detected, suppressing the mechanical oscillation of the permanent magnet AC motor.

Permanent magnet motor start-up

According to an example embodiment, a method is provided for limiting an operational temperature of a motor. The method includes generating a maximum allowable current I*for a motor based on a temperature difference between a temperature reference T* of a power inverter module and a semiconductor device temperature T of the power inverter module. The method further includes generating a maximum allowable torque T*based on the maximum allowable current I*and a maximum allowable flux &#x3a8;*, and using the maximum allowable torque T*to limit the torque command T*in order to suppress the semiconductor device temperature T to below the temperature reference T*.

Power inverter module thermal management

A control system for a motor including a rotor comprises a sensorless sensor module that includes a saliency-based estimator module that generates a first rotor position signal based on saliency and a back electromotive force (emf) estimator module that generates a second rotor position signal based on back emf. A selector selects the first rotor position signal for rotor speeds below a first rotor speed and the second rotor position signal for rotor speeds above the first rotor speed. A rotor position sensor senses a position of the rotor and generates a third rotor position signal. A fault detection module senses faults in the rotor position sensor and outputs the third rotor position signal when a fault is not detected and one of the first and second rotor position signals when the fault is detected. An indirect field oriented control (IFOC) system controls the motor based on a selected one of the first, second and third rotor position signals.

Position sensor fault tolerant control for automotive propulsion system

Growing community of inventors

San Pedro, CA, United States of America

Michael Milani