Ut Automotive Dearborn, Inc.

Hongling Kang

Harry F Dutka

Rick A Scherer

A method for testing motor armature shafts is disclosed. The method includes simulating armature shaft loading conditions to test armature shaft reliability for failure. The shaft has a longitudinally extending axis, which during operation is the axis of rotation of the shaft. In the method the shaft is fixedly supported at two spaced locations a predetermined distance from one of the free ends. A normal force is rotated about the shaft's longitudinal axis. This force is exerted continuously about the circumference of the free end of the armature shaft, so that the armature shaft is continuously offset a predetermined distance from its longitudinal axis. This force is continuously applied for a predetermined number of rotations of the shaft. This simulates loading of the armature shaft in an assembled motor.

Method for testing motor armature shafts

A commutator system comprising a commutator and a commutator brush. The commutator has electrically conducting surfaces that are electrically separated from each other by non-conducting segments. The edges of the conducting surfaces adjacent to the non-conducting segments are oriented at an angle to the rotational axis of commutator. The commutator brush has edges oriented at substantially the same angle.

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Livonia, MI, United States of America

Hongling Kang