Teco-Westinghouse Motor Company

Active Power, Inc.

James Arnold Keck

Paulo Guedes-Pinto

Haran Chandra Karmaker

Edward Kuan-Chen Chen

Donald M Hudson

Paul C Peterson

In one embodiment, a high speed induction machine includes: a stator formed of a first plurality of laminations having a thickness of less than approximately 0.01 inch and a winding comprising a coil formed of Litz wire adapted about the stator; and a rotor adapted within the stator. The rotor may include: a rotor core formed of a second plurality of laminations having a second thickness of greater than approximately 0.10 inch and formed of high strength steel and sandwiched between a first end region including at least one first peripheral second lamination and a second end region including at least one second peripheral second lamination, the first end region having a first end ring retained by a first retaining ring adapted there around, the second end region having a second end ring retained by a second retaining ring adapted there around.

High speed induction machine

This disclosure includes anti-reverse rotation apparatuses, rotors for use therein, and related methods. Some apparatuses include a stator defining an interior volume and one or more arcuate contact surfaces within the interior volume, and a rotor rotatably coupled to the stator and at least partially disposed within the interior volume, the rotor having a hub, two or more shoes, each pivotally coupled to the hub and extending between a first end and a second end that is farther from the hub than is the first end, wherein each of the shoes is rotatable relative to the hub between: (a) a first position in which the second end of the shoe contacts at least one of the arcuate contact surface(s) of the stator; and (b) a second position in which the second end of the shoe does not contact the arcuate contact surface(s) of the stator.

Anti-reverse rotation apparatuses, rotors for use therein, and related methods

Systems and methods are provided for cooling bearings or other objects. Such cooling may be accomplished by expanding a compressed gas in a cooling channel surrounding a bearing and allowing the expanded air to come into direct contact with the bearing. Expanding a compressed gas in local proximity of the bearing takes advantage of the Joule-Thompson expansion of gas, resulting in a substantial drop in gas temperature, thereby maximizing the cooling potential of the gas being directly applied to the bearing. Cooling bearings in this manner extends their operational life and enables them to operate at the desired speeds. A housing may be provided for receiving a compressed gas, expanding the compressed gas to a predetermined pressure, enabling the expanded gas to directly contact the bearing, and exhausting the expanded gas.

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Round Rock, TX, United States of America

James Arnold Keck