Eddy Current Heating Device with Alternating Permanent Magnets
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Solution Overview
Problem
Existing wind electric generating facilities have complex structures and experience significant energy loss due to multistage energy conversion, and the magnetic flux density reaching the rotor in current heat generators is low, resulting in insufficient thermal energy recovery from kinetic energy.
Innovation Solution
An eddy current heat generating apparatus with a rotary shaft, a heat generator, and a magnet holder that arrays permanent magnets with opposite magnetic pole arrangements to enhance magnetic flux density, coupled with a heat recovery system using a closed container and heat medium to efficiently collect thermal energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If permanent magnets are arrayed with same magnetic pole arrangements, then the structure is simple, but the magnetic flux density reaching the heat generator is low
Solution Approach 1:
The patent applies asymmetry by arranging permanent magnets with alternating opposite magnetic pole orientations (north-south-north-south pattern) rather than uniform alignment. This asymmetric magnetic pole arrangement creates concentrated magnetic flux density in the gap between the heat generator and magnets, resolving the contradiction between structural simplicity and magnetic flux density enhancement.
2Use of energy by moving object
If multistage energy conversion is used, then energy conversion is achieved, but energy loss increases and structure becomes complex
Solution Approach 1:
The patent extracts the heat generation function from the traditional multistage energy conversion system. By directly converting kinetic energy of the rotary shaft into thermal energy through eddy currents in the heat generator, it eliminates intermediate conversion stages (hydraulic pump, hydraulic motor, etc.), thereby reducing energy loss and simplifying the structure while maintaining effective energy conversion.
Solution Approach 2:
The patent replaces the mechanical hydraulic transmission system with a direct electromagnetic conversion system. Instead of using hydraulic pumps and motors for energy conversion, it employs eddy current heating to directly transform mechanical kinetic energy into thermal energy, reducing mechanical complexity and energy loss.
3Quantity of substance
If conventional heat collection method is used, then heat can be collected, but heat loss to surrounding environment occurs
Solution Approach 1:
The patent applies nesting by placing the heat generator inside a heat-insulated container or housing structure. This nested configuration allows efficient heat collection from the heat generator while providing thermal insulation to prevent heat loss to the surrounding environment, thereby improving thermal energy retention.
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 apparatus achieves high magnetic flux density and efficient heat generation, allowing for effective recovery of thermal energy from kinetic energy with reduced energy loss and simplified structure.
Implementation Method 1
employing permanent magnets (hereinafter referred to simply as 'magnets') and utilizing eddy currents generated by the effects of magnetic fields from the magnets
Implementation Method 2
utilizing eddy currents generated by the effects of magnetic fields from the magnets
Data Source
Figure 1
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AI summary
The disclosed heat generating apparatus (1) includes: a rotary shaft (3), a heat generator (4), a plurality of permanent magnets (5), a magnet holder (6), and a heat recovery system. The rotary shaft (3) is rotatably supported by a non-rotative body (2). The heat generator (4) is fixed to the rotary shaft (3). The magnets (5) are arrayed to face the heat generator (4) with a gap such that magnetic pole arrangements of adjacent ones of the magnets are opposite to each other. The magnet holder (6) holds the magnets (5) and is fixed to the body (2). The heat recovery system collects heat generated in the heat generator (4).