Techniques for submicron radial alignment and airflow management of motor components to extend motor life

Abstract

The present disclosure generally relates to techniques for radial alignment of motor components relative to each other to achieve a motor with a rotor bore having a submicron end-to-end offset. In an embodiment, a rotor bore alignment tool is disclosed herein that is insertable between motor components, and more particularly, between apertures / through bores defined by each of the motor components, such as a housing section and a stator assembly. The rotor bore alignment tool includes an extensible member that is selectively transitionable to an extended position to radially align each motor component, the motor components thereafter being securely coupled in a so-called "stack" to form the motor. For example, once the motor components are coupled together, the resulting motor includes a rotor shaft extending from end to end, preferably including a submicron deviation of less than 10 microns and more preferably less than or equal to 5 microns.

Description

[0001] Cross-reference to related applications [0002] This application claims the benefit of US Provisional Application No. 62 / 944,068, filed December 5, 2019, which is incorporated herein by reference in its entirety. technical field [0003] This specification relates generally to electric motors, and in particular to techniques for sub-micron radial alignment of electric machine components, and use in electric motors to split airflow to create one or more air jets to cool windings and rotor assemblies, etc. Diffuser unit for core motor components. Background technique [0004] Electric motors are widely used in consumer and industrial applications. A variety of electric motors are available, and electric motors tend to fall into one of two broad motor types, brushed and brushless. [0005] For example, a brushed DC motor has permanent magnets outside its structure and a spinning armature inside. The permanent magnets fixed to the outside are called stators. The arma...

AI Technical Summary

Problems solved by technology

For example, angular and / or radial misalignment of rotor shafts can significantly affect the nominal power / torque of the motor, introduce acoustic noise (e.g., via vibrations), and ultimately be based on, for example, asymmetry along the associated rotor shaft premature component failure due to load

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