Radially Offset Motor Controller Housing Design
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Solution Overview
Problem
Conventional electric motor designs often have the controller mounted at one axial end, limiting flexibility and space usage, especially in compact applications like HVAC systems, where a more distributed mounting configuration is needed to improve installation and access.
Innovation Solution
The motor design features a rotor, stator, motor shell, and a radially positioned controller housing with a connector system that secures the controller housing to the stator and endshields, allowing for a radially offset electronics compartment outside the motor shell, enabling secure mounting and improved access to both ends of the shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the controller is mounted at one axial end of the motor, then the mounting structure is simple, but the flexibility and space usage are limited
Solution Approach 1:
The controller housing is positioned radially outside the motor shell rather than at an axial end, transitioning the mounting location from one dimension (axial) to another dimension (radial). This radial offset configuration provides unobstructed access to both shaft ends while improving space utilization and mounting flexibility in compact applications.
2Ease of operation
If the controller housing is positioned radially outside the motor shell, then access to shaft ends is improved, but the mounting and securing mechanism becomes more complex
Solution Approach 1:
The connector system employs a nested structure where the connector is received within the controller housing, and the fastener extends through the connector to secure it to the motor components. This nested arrangement provides a compact, integrated mounting solution that achieves secure fixation without excessive complexity.
3Reliability
If the controller housing is securely fixed to the stator and endshields, then reliability is improved, but the number of fasteners and connectors increases
Solution Approach 1:
The mounting system merges multiple functions into integrated components: the fastener simultaneously connects the controller housing to the stator and endshields, while the connector provides both structural attachment and electrical connection pathways. This consolidation reduces the total number of separate components while maintaining secure fixation and reliability.
Data Source
AI summary
A motor comprising a rotor, a stator, a motor shell, a pair of motor endshields, and a controller housing is provided. The rotor is rotatable about an axis. The stator presents opposite axial ends. The motor shell extends around the axis to at least partly circumscribe the rotor and stator. Each motor endshield is positioned adjacent a respective one of the stator ends and provides support for the rotor. The fastener extends through and interconnects the stator and endshields. The controller housing defines an electronics compartment positioned radially outside the motor shell. The controller housing includes a connector that receives the fastener so as to fix the controller housing to the stator and endshields.