Non-Contact Disk Coupling Using Eddy Currents for Stable Power Transfer
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Solution Overview
Problem
Existing power transmission devices face issues such as mechanical friction, noise, vibration, reduced durability, and inefficient energy transfer due to mechanical and magnetic couplings, with magnetic couplings experiencing periodic slip, heat generation, and reduced efficiency.
Innovation Solution
A non-contact power transmission device utilizing a magnetic-to-non-magnetized structure, comprising a first disk unit with a magnetic body and a second disk unit with a non-magnetized body, allowing for controlled rotation and load adjustment through spacing and magnetic force, with heat dissipation features to prevent mechanical damage and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic coupling structure using attractive and repulsive forces of magnets is used to transmit power non-contact, then mechanical friction and noise are eliminated, but periodic slip phenomenon occurs making it difficult to transmit constant power
Solution Approach 1:
The patent replaces the conventional magnet-to-magnet coupling system with a magnetic-to-non-magnetized structure. The magnetic body on the driving shaft generates a magnetic field that induces eddy currents in the non-magnetized conductive body on the driven shaft, creating electromagnetic coupling instead of direct magnetic attraction/repulsion. This substitution eliminates periodic slip while maintaining non-contact operation, resolving the contradiction between eliminating mechanical friction and ensuring stable power transmission.
Solution Approach 2:
The patent changes the fundamental parameter of the coupling structure from using magnetized bodies on both sides to using a magnetized body on one side and a non-magnetized conductive body on the other. This parameter change transforms the coupling mechanism from magnetic attraction/repulsion to electromagnetic induction, enabling continuous stable power transmission without periodic slip while maintaining the benefits of non-contact operation.
2Reliability
If conventional magnetic coupling is used to prevent mechanical contact and overload, then mechanical burnout is reduced, but magnetic heat and resistance heat generation decrease energy efficiency
Solution Approach 1:
The patent converts the harmful eddy currents, which were previously considered a source of energy loss and heat generation, into the primary mechanism for power transmission. By designing the system where eddy currents in the non-magnetized conductive body create the electromagnetic coupling force, what was once a harmful effect becomes the useful mechanism for non-contact power transmission, improving energy efficiency while maintaining mechanical durability.
3Stability of the object's composition
If an integrated magnetic coupling structure is used to overcome periodic slip, then power transmission stability improves, but device complexity and heat generation increase
Solution Approach 1:
The patent extracts and eliminates the complex integrated magnetic coupling structure by using a simpler magnetic-to-non-magnetized configuration. Instead of requiring multiple magnets arranged in complex patterns to overcome periodic slip, the invention uses a single magnetic body that induces eddy currents in the non-magnetized conductive body, achieving stable power transmission with a much simpler structure that generates less heat and has lower complexity.
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 device achieves stable power transmission without mechanical impact, noise, or vibration, enabling smooth reverse rotation and efficient energy transfer by minimizing heat and corrosion, while allowing for adjustable rotation speed and load control.
Implementation Method 1
a magnetic body on one side surface of a first disk unit coupled to one of a power shaft or a load shaft; and a non-magnetized body on the other side surface of a second disk unit coupled to a load shaft or the power shaft
Implementation Method 2
other general magnetic couplings generate magnetic heat and resistance heat due to eddy currents when attractive force and repulsive force occur
Data Source
AI summary
A non-contact no-load power transmission device which can transmit power in a non-contact no-load state by using a magnetic-to-nonmagnetic structure. For this purpose, provided is a non-contact no-load power transmission device characterized by operating in a non-contact manner and comprising: a first disc unit 10 coupled to one of a power shaft or a load shaft and having a magnetic body on one side surface; and a second disc unit 20 coupled to the power shaft or the load shaft that corresponds to the first disc unit 10 and formed of a non-magnetized body that attracts the magnetic body.