Integral Rotor Body for Lower-Cost Wet Rotor Drive Motors
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Solution Overview
Problem
The existing electric drive motors with stators and rotors have complex structures and high production costs, making their production inefficient and costly.
Innovation Solution
An electric drive motor design where the motor shaft and magnet carrier are produced as an integral design from a single metal sheet through shaping techniques like deep drawing, reducing assembly complexity and costs, and allowing for a rotor with permanent magnets that can be arranged to form a circumferential ring, enhancing magnetic field influence and mechanical rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the motor shaft and magnet carrier are produced as separate components and assembled, then the structural flexibility and ease of repair are improved, but the device complexity and production costs increase
Solution Approach 1:
The motor shaft and magnet carrier are merged into a single integral component produced from one initial metal sheet through shaping processes. This eliminates the need for separate manufacturing and assembly operations, reducing device complexity while maintaining functional flexibility and ease of repair through the unified design.
2Adaptability or versatility
If multiple separate components are used for the rotor assembly, then the adaptability and ease of manufacture are improved, but the productivity and manufacturing precision decrease
Solution Approach 1:
The rotor assembly components are combined into a single integral structure formed from one metal sheet through shaping processes. This unified production approach eliminates multiple assembly steps, significantly improving productivity and manufacturing precision while maintaining adaptability through design flexibility.
3Ease of manufacture
If the motor shaft and magnet carrier are produced separately, then the ease of manufacture and adaptability are improved, but the structural integrity and mechanical rigidity decrease
Solution Approach 1:
The motor shaft and magnet carrier are merged into a single integral component with continuous material structure. This unified construction provides superior mechanical rigidity and structural integrity compared to separate components, while the shaping processes maintain ease of manufacture through efficient metal forming operations.
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 simplifies production, reduces costs, and optimizes the structural complexity of the electric drive motor, enabling efficient magnetic field generation and mechanical support, while maintaining the integrity of the magnetic and mechanical properties.
Implementation Method 1
having a stator with at least one electrically actuatable stator winding, and a rotor which is mounted in a rotationally drivable manner in the field of the at least one actuatable stator winding
Implementation Method 2
Through the magnetic effect of the field on the at least one permanent magnet of the rotor mounted in a rotationally drivable manner a controlled circular movement of the rotor or of the motor shaft of the rotor mounted in a rotationally drivable manner can be produced
Data Source
AI summary
An electric drive motor has a stator with at least one electrically energizable stator winding, and a rotor which is mounted in a rotationally driveable manner in the field of the at least one stator winding so as to leave free an annular gap. The motor also has a motor shaft and a magnet carrier which is arranged coaxially in relation to the motor shaft and has at least one permanent magnet which is arranged on an outer periphery of the magnet carrier. The motor shaft and the magnet carrier are of integral design by way of the motor shaft and the magnet carrier being jointly produced from an individual starting metal sheet by shaping to form an integrally shaped rotor body. There is also described a wet-rotor pump and a domestic appliance having an electric drive motor of this kind.