Electric Actuator Layout With Nested Stator Housing
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Solution Overview
Problem
Existing electric actuators with electric motors having rotors that rotate within stator housings face challenges in accommodating the axial installation length within limited spaces, often requiring external fastening and exposing components to environmental corrosion.
Innovation Solution
The stator housing is arranged with an axial end within a controller housing and fastened securely, allowing the stator to be immersed in the controller housing, which reduces the external axial length and protects the components from corrosion by eliminating the need for external fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the stator housing is arranged externally with traditional fastening methods, then the motor can be assembled and secured, but the axial installation length increases and components are exposed to environmental corrosion
Solution Approach 1:
The stator housing is nested within the controller housing, with the axial end of the stator housing arranged inside the controller housing. This nesting arrangement allows the stator housing to be protected from environmental corrosion while reducing the external axial installation length, as the fastening region is incorporated within the controller housing rather than extending externally.
2Length of moving object
If the stator housing axial end is arranged inside the controller housing, then the axial installation length is reduced and components are protected from corrosion, but the controller housing must accommodate additional space
Solution Approach 1:
The invention utilizes the radial dimension of the controller housing to accommodate the axial end of the stator housing. By arranging the stator housing axial end within the radial space of the controller housing rather than extending it axially, the solution reduces the external axial installation length while incorporating the fastening region within the existing controller housing volume.
3Strength
If external fastening methods are used, then the stator housing can be securely attached, but the fastening components are exposed to environmental corrosion
Solution Approach 1:
The fastening means are nested within the controller housing, with the fastening region of the stator housing arranged inside the controller housing. This protects the fastening components from environmental corrosion while maintaining secure attachment through the integrated fastening means, eliminating the need for external fastening elements that would be exposed to the environment.
Data Source
AI summary
The disclosure relates to an electric actuator having an electric motor comprising a rotor which is arranged such that it can rotate about an axis of rotation in a stator housing having an axial installation length. To simplify accommodating the electric actuator in a limited axial installation space, the stator housing is arranged with an axial end in a controller housing and is fastened within the controller housing.