Outer Rotor Motor with Radially Integrated Control Board
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Solution Overview
Problem
Conventional outer rotor motors for washing machines have inconvenient and expensive mounting arrangements, extensive wiring that increases costs and electromagnetic interference risks, and complex assembly processes due to separate motor and control board units.
Innovation Solution
An outer rotor motor design with a control board assembly mounted radially inside the stator, reducing wiring length, eliminating the need for a dripshield, and integrating the motor and control board as a single unit, thus simplifying assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control board assembly is located remotely from the motor and connected by a wiring harness, then the control board can be positioned for ease of user access, but the extensive wiring increases expense and electromagnetic interference risks
Solution Approach 1:
The control board assembly is integrated directly into the motor assembly, merging two previously separate components into a single unified unit. This eliminates the wiring harness connecting them, reducing electromagnetic interference and device complexity while maintaining control functionality.
2Ease of operation
If the control board assembly is located remotely from the motor, then it can be positioned in a water-prone area for user access, but a dripshield housing must be provided to protect from water encroachment
Solution Approach 1:
By integrating the control board assembly into the motor assembly, the control board is positioned within the motor housing which provides inherent protection from water encroachment. This eliminates the need for a separate dripshield housing while maintaining user accessibility through the motor's existing structure.
3Ease of manufacture
If the stator core is made large enough to house mounting openings, then mounting can be accomplished through the core, but the core becomes heavy and expensive
Solution Approach 1:
Mounting openings are provided in the mounting plate rather than the stator core. This shifts the mounting function to a separate dimension (the mounting plate structure) allowing the stator core to remain lightweight while still enabling convenient mounting through the integrated mounting plate.
4Ease of manufacture
If the stator core is made large enough to house mounting openings, then mounting can be accomplished through the core, but the core fabrication process must be varied for different mounting arrangements
Solution Approach 1:
The mounting functionality is segmented from the stator core by providing mounting openings in the mounting plate instead. This allows the stator core fabrication process to remain standardized while mounting arrangements can be varied by modifying the mounting plate, improving both manufacturing efficiency and adaptability.
5Ease of manufacture
If the motor and control board are provided as separate units, then they can be manufactured independently, but the number of components and assembly steps increases
Solution Approach 1:
The control board assembly is integrated directly into the motor assembly, merging two previously separate units into a single unified component. This reduces the total number of components and assembly steps while maintaining the ability to manufacture the integrated unit efficiently.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces assembly time and costs, improves signal quality, and eliminates the need for protective housing, while allowing for a more compact and efficient packaging of the motor and control board as a single unit.
Implementation Method 1
The coils are formed by the winding of electrically conductive wire multiple times around each tooth
Data Source
AI summary
An outer rotor motor is provided for use in a machine. The motor includes a rotor and a stator. A control board assembly configured to control at least one operational characteristic of the motor is mounted at least in part radially inside the stator.