REDUCTION OF COOLING GAS INDUCED RADIAL FORCES AND RECIRCULATION FLOWS IN ELECTRIC MOTOR OF INTEGRATED COMPRESSOR
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Sep 5, 2023
filing date -
Sep 5, 2023
priority date (Note) -
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Abstract
An integrated compressor comprises an electric motor that is prone to windage losses, radial loads, and recirculation flows. According to a first feature, partial grooves or riblets may be formed on the surface of a motor stator that defines the radially outward boundary of the air gap between the motor stator and the motor rotor. These partial grooves or riblets may maintain low to moderate windage losses, while reducing radial loads in the motor. According to a second feature, a support structure may be designed with a nose portion that is configured to disrupt or otherwise reduce recirculation flows within the end-winding cavity housing the end-winding of the motor. According to a third feature, the spiral orientation of the top coil of the end-winding may be aligned with the rotation direction of the motor rotor to reduce recirculation flows within the end-winding cavity.
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