Motor Power-Generating Coil Set Axial Thickness Reduction
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Solution Overview
Problem
Conventional cooling fans with power-generating capabilities have a complex structure and increased axial thickness due to separate air gaps and staggered arrangements of magnet and coil sets, making it difficult to achieve a thin, compact design for both motor and power generation functions.
Innovation Solution
A motor design with a power-generating coil set where the driving coil set and power-generating coil set are arranged to share the same axial position, with overlapping air gaps and optimized radial distances, allowing for a simple and thin structure without additional magnets, and utilizing a rotor with a magnetic member that covers both coil sets, enabling efficient power generation and rotational driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate driving unit and power-generating unit are arranged in different axial positions, then both motor and power generation functions are achieved, but axial thickness increases and structure becomes complex
Solution Approach 1:
The patent merges the driving coil set and power-generating coil set into the same axial position, allowing both motor and power generation functions to be achieved within a single air gap region. This combining approach eliminates the need for separate axial positions, thereby reducing overall axial thickness while maintaining dual functionality.
Solution Approach 2:
The patent implements multi-functionality by designing a single air gap region that serves both as the working space for the driving coil set (motor function) and the power-generating coil set (power generation function). The magnetic member is configured to interact with both coil sets simultaneously, enabling one structural region to fulfill multiple functions.
2Adaptability or versatility
If driving coil set and power-generating coil set are arranged in different axial positions, then both functions are achieved, but device complexity increases
Solution Approach 1:
The patent combines both coil sets and the magnetic member into a single integrated structure within one air gap region. This merging eliminates the need for separate mounting structures, support components, and alignment mechanisms that would be required for staggered arrangements, thereby significantly reducing device complexity.
Solution Approach 2:
The magnetic member is designed to serve dual purposes: interacting with the driving coil set to produce motor torque and interacting with the power-generating coil set to induce electrical power. This universal component approach reduces the total number of parts and simplifies the overall device architecture.
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 motor achieves rotational driving and power generation with a thin axial structure, simplifying the design and eliminating the need for additional magnets, while maintaining efficient power generation capabilities without increasing radial size.
Implementation Method 1
the driving coil set and the power-generating coil set are disposed above the supporting surface... the magnetic member is mounted on the coupling surface and has a magnetic face facing the driving coil set and the power-generating coil set
Implementation Method 2
the second coil 942 is moved relatively to the second magnet ring 941 by the rotation of the fan wheel 92, and thus the second coil 942 generates an induced current by the magnetic field of the second magnet ring 941 due to flux linkage
Data Source
AI summary
A motor with power-generating coil set including a base, a rotor, a driving circuit and a power-storing unit is disclosed. The base has a shaft coupling portion and a supporting surface, wherein the supporting surface surrounds the shaft coupling portion, and a driving coil set and a power-generating coil set are disposed above the supporting surface. The rotor has a carrier, a shaft and a magnetic member, wherein the carrier has a coupling surface, the shaft rotatably couples with the shaft coupling portion of the base, and the magnetic member is mounted on the coupling surface and has a magnetic face facing the driving coil set and the power-generating coil set. The driving circuit electrically connects with and sends a driving signal to the driving coil set. The power-storing unit electrically connects with and stores electric power generated by the power-generating coil set.