Magnetic Coupling Control Device Linear Resistance Adjustment
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Solution Overview
Problem
Conventional magnetic control units for fitness equipment face challenges such as nonlinear resistance adjustment, heat generation issues with electromagnets, and complexity in controlling magnetic resistance, leading to increased production costs and precision difficulties.
Innovation Solution
A magnetic coupling control device comprising a magnetic flywheel unit, a magnetoresistive ring frame, and a magnetic coupling unit, where the magnetoresistive ring frame moves axially to control magnetic resistance linearly, and the magnetic coupling unit includes a rotating shaft connected to a fan or power generating module to dissipate heat and output energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the distance between the magnetic control unit and the flywheel is adjusted to control magnetic resistance, then the magnetic resistance can be adjusted, but the relationship between magnetic resistance and distance is nonlinear, requiring complex adjustment mechanisms or non-linear movement to achieve linear resistance control
Solution Approach 1:
The patent replaces the conventional mechanical adjustment mechanism with a magnetic coupling system. The magnetic resistance is controlled by adjusting the axial position of the magnetoresistive ring frame relative to the magnetic flywheel unit, utilizing magnetic field interaction rather than mechanical contact. This substitution eliminates complex mechanical linkages and achieves smooth, continuous resistance adjustment.
Solution Approach 2:
The patent changes the control parameter from radial distance adjustment to axial position adjustment. By moving the magnetoresistive ring frame along the axial direction of the flywheel, the magnetic resistance can be linearly controlled. This parameter change simplifies the adjustment mechanism and achieves a linear relationship between displacement and magnetic resistance.
2Power
If an electromagnet is used as the magnetic control unit to generate magnetic resistance force, then magnetic resistance can be generated, but the electromagnet generates considerable heat after long use, making temperature control difficult
Solution Approach 1:
The patent extracts the heat generation problem by separating the magnetic force generation function from the electromagnet. Instead of using an electromagnet that converts electrical energy to magnetic field and generates heat, the patent uses permanent magnets in the magnetic flywheel unit that provide continuous magnetic force without heat generation. The magnetic resistance is controlled by position adjustment rather than electromagnetic power variation.
3Power
If an electromagnet is used to generate magnetic resistance, then magnetic force can be produced, but the control precision is difficult to achieve and the system becomes complicated
Solution Approach 1:
The patent replaces the electromagnet-based control system with a magnetic coupling system based on permanent magnets. The magnetic resistance is controlled by precisely adjusting the axial position of the magnetoresistive ring frame, which interacts with the magnetic field of the permanent magnets. This mechanical position-based control provides more precise and stable resistance control compared to electromagnetic control.
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 solution provides stable and precise control of magnetic resistance with a linear proportional relationship between resistance and displacement, while effectively dissipating heat and generating electricity or outputting energy, thus simplifying the control mechanism and reducing costs.
Implementation Method 1
The first magnetic poles of the second magnets and the second magnetic poles of the third magnets together form a second annular magnetic series that is magnetically coupled to the first annular magnetic series
Implementation Method 2
Each first magnet comprises a first magnetic pole facing toward the center of axis of the flywheel, and a second magnetic pole opposite to the first magnetic pole
Implementation Method 3
The magnetoresistive ring frame is mounted to the external machine around the periphery of the flywheel and movable along the axial direction of the flywheel
Implementation Method 4
The rotating shaft is selectively connected with a fan module, a power generating module or an output shaft
Implementation Method 5
The rotating shaft is selectively connected with a fan module, a power generating module or an output shaft
Data Source
AI summary
A magnetic coupling device includes a magnetic flywheel unit including a flywheel and multiple first magnets equiangularly spaced around the periphery of the flywheel to form a first annular magnetic series with the same pole facing toward the radial outer side of the flywheel, and a magnetic coupling unit including a plate body rotatably mounted to the periphery of the flywheel, a rotating shaft mounted to the center of axis of the plate body, multiple second magnets and third magnets alternatively mounted on the plate body around the rotating shaft to create a second annular magnetic series that is magnetically coupled to the first annular magnetic series. Further, a magnetoresistive ring frame is mounted to the periphery of the flywheel for movement along the axial direction of the flywheel to create a magnetic coupling control device.