Planar Multi-Disc Induction Hub for Compact Wheel Power Generation
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Solution Overview
Problem
Existing wheel hub configurations for electric vehicles are too large to be effectively integrated into the hub, limiting the energy conversion efficiency and vehicle endurance due to insufficient magnetic field strength and inefficient power generation.
Innovation Solution
An electromagnetic induction hub is designed without laminated steel sheets, featuring a coil winding stack made of copper wire, improved coil and magnet arrangements, and a sandwich structure configuration to enhance power generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conventional concentric rotor-stator configuration is used, then the generator structure is simple, but the volume is too large to be configured in the hub
Solution Approach 1:
The patent transitions from a conventional concentric cylindrical rotor-stator configuration to a planar multi-disc stacked arrangement. Multiple disc-shaped stators and rotors are stacked along the rotational axis, transforming the three-dimensional radial configuration into a layered planar structure that fits within the hub's axial space while maintaining rotational functionality.
Solution Approach 2:
The generator is divided into multiple independent disc-shaped modules (stators and rotors) that can be stacked and arranged in series. Each disc module functions as an independent electromagnetic conversion unit, allowing the overall system to achieve compact dimensions while integrating multiple functional elements within the hub structure.
2Productivity
If the magnetic field strength is increased to improve power generation efficiency, then the energy conversion efficiency improves, but the device size and weight increase
Solution Approach 1:
The patent employs high-performance permanent magnets with superior magnetic properties (such as rare-earth magnets) that provide strong magnetic field strength with reduced material volume. This allows the generator to achieve high power generation efficiency while keeping the magnet mass and overall hub weight within acceptable limits.
Solution Approach 2:
The patent optimizes electromagnetic parameters including magnetic flux density, coil winding density, and turn ratios to maximize induced current generation. By carefully tuning these parameters, the system achieves high power generation efficiency without requiring excessive magnetic field strength that would increase weight.
3Power
If more coils and magnets are added to improve magnetic flux change, then the induced current increases, but the device complexity and volume increase
Solution Approach 1:
The coil and magnet systems are divided into multiple disc modules stacked in series. Each disc contains a simplified arrangement of coils and magnets, but the cumulative effect of multiple discs produces the required total magnetic flux change and induced current without requiring a single complex large-scale configuration.
Solution Approach 2:
Multiple disc modules are combined along the rotational axis, merging their individual electromagnetic contributions. The series arrangement of multiple stator-rotor-disc sets accumulates the induced current from each module, achieving high total power output while each individual module maintains a simple and compact structure.
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 proposed electromagnetic induction hub improves power generation efficiency, extends vehicle endurance, and reduces weight and material costs by optimizing the magnetic field strength and energy conversion process.
Implementation Method 1
According to Faraday's law of electromagnetic induction, the induced current generated by the generator is directly proportional to the size of the magnetic field. When the magnetic flux of the coil in the magnetic field changes more, the induced current can be generated more.
Data Source
AI summary
An electromagnetic induction hub includes a first disc having a first magnet, a second disc having a second magnet, a coil disc formed between the first disc and the second disc, a bearing penetrates the first disc, the second disc and the coil disc.