Motor Rotor Core Plate Stack Adhesive Leakage Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Adhesives used to fix magnets to rotor cores in motors tend to flow downward and leak outside, compromising the motor's performance and structural integrity.
Innovation Solution
A motor design featuring a rotor core formed by stacked plates with a lower end plate covering the pocket and an upper end plate positioned higher than the magnet, preventing adhesive leakage while maintaining magnetic flux density and motor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied into the pocket to fix the magnet, then the magnet is securely fixed to the rotor core, but the adhesive flows downward and leaks to the outside of the rotor core
Solution Approach 1:
The rotor core is segmented into multiple plates stacked together, with the lower end plate specifically designed to cover the pocket opening. This segmentation allows the pocket to be enclosed within the stacked plate structure, preventing adhesive leakage while maintaining the fixation function.
Solution Approach 2:
The lower end plate acts as an intermediary element between the pocket and the external environment. By positioning the lower end plate to cover the pocket opening, it serves as a barrier that prevents adhesive from flowing outward while still allowing the adhesive to function within the enclosed pocket space.
2Object-generated harmful factors
If the rotor core is formed by stacking multiple plates, then adhesive leakage is prevented, but the device complexity increases
Solution Approach 1:
The stacked plate structure serves multiple functions simultaneously: it provides the rotor core body, creates enclosed pockets for magnet fixation, prevents adhesive leakage, and maintains mechanical strength. This multi-functionality reduces the need for additional separate components to address each function individually.
Solution Approach 2:
The rotor core is constructed by nesting multiple plates together in a stacked configuration. Each plate contributes to the overall structure, with the lower end plate nesting over the pocket opening to provide containment, while other plates form the complete rotor core assembly.
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
The design effectively inhibits adhesive leakage, secures motor performance, and ensures sufficient magnetization even when the magnet is positioned below a sensing plate, enhancing the motor's overall efficiency and reliability.
Implementation Method 1
An adhesive is used so that the magnet is fixed to the pocket
Implementation Method 2
the coils which generate a rotating magnetic field are wound around the stator and electrically interact with the rotor to cause the rotor to rotate
Implementation Method 3
A motor rotates to generate power due to an interaction between a rotor including a plurality of magnets and an electromagnetic force
Data Source
AI summary
The present invention may provide a motor including a shaft, a rotor disposed outside the shaft, and a stator disposed outside the rotor, wherein the rotor includes a rotor core surrounding the shaft and a magnet disposed inside the rotor core, the rotor core includes a pocket in which the magnet is disposed, the rotor core is formed by stacking a plurality of plates, a lower end plate of the plurality of plates is disposed to cover at least a part of the pocket, and an upper end plate of the plurality of plates is disposed at a level higher than a level of the magnet.