Magnetic Coupling Component for Current Balancing in Parallel Conductors
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Solution Overview
Problem
Existing electrical machine designs face challenges in uniformly distributing high current intensities across multiple parallel conductors, leading to inefficiencies and increased losses due to non-uniform current distribution, which is costly and dimensionally cumbersome to address with traditional transpositions and transposed cables.
Innovation Solution
A magnetic coupling component with inverted windings is introduced to balance currents across parallel conductors by adjusting the turns ratio and winding configurations, ensuring uniform current distribution and minimizing losses, applicable to both AC and DC applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the cross-section of the conductor is increased to reduce losses, then the losses decrease, but the current distribution becomes non-uniform due to skin effect and magnetic effects
Solution Approach 1:
The patent divides a single large conductor into multiple parallel conductors to distribute current. This segmentation allows the current to be distributed more uniformly across multiple smaller paths, mitigating the skin effect and magnetic effects that cause non-uniform current distribution in thick conductors, thereby reducing overall conductor losses.
Solution Approach 2:
The patent introduces a magnetic coupling component with inverted windings as an intermediary device. This component generates compensating magnetic flux that counteracts the parasitic voltages arising from non-uniform current distribution, thereby restoring uniform current distribution across parallel conductors and reducing energy losses.
2Use of energy by moving object
If the current is divided into several parallel paths, then the conductor surface utilization improves, but parasitic voltages cause non-uniform current distribution
Solution Approach 1:
The magnetic coupling component acts as an intermediary that detects non-uniform current distribution through induced voltages and generates compensating magnetic flux. This compensating flux counteracts the parasitic voltages, thereby restoring uniform current distribution across the parallel conductors and improving overall energy utilization.
Solution Approach 2:
The patent implements a feedback mechanism where the magnetic coupling component continuously monitors current distribution through induced voltages and automatically adjusts the compensating magnetic flux accordingly. This feedback loop ensures that current distribution remains uniform despite variations in operating conditions, thereby maintaining optimal conductor surface utilization.
3Stability of the object's composition
If transpositions are used to balance current distribution, then current uniformity improves, but the machine dimensions and complexity increase
Solution Approach 1:
The patent replaces the mechanical transposition system with an electromagnetic field-based solution. Instead of physically repositioning conductors through complex transposition arrangements, the magnetic coupling component uses electromagnetic induction to generate compensating flux, thereby achieving current balance without mechanical complexity or increased dimensions.
4Stability of the object's composition
If transposed cables are used to achieve current balance, then current distribution uniformity improves, but costs and overall dimensions increase
Solution Approach 1:
The patent substitutes bulky transposed cable structures with a compact magnetic coupling component. This electromagnetic solution achieves the same current balancing effect without requiring the extensive physical space and weight associated with traditional transposed cable arrangements, thereby reducing overall machine dimensions and cost.
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 achieves uniform current distribution across conductors, reducing losses and overall dimensions while lowering costs, and maintains stability against external variations in current flow distribution.
Implementation Method 1
A magnetic coupling component with inverted windings is introduced to balance currents across parallel conductors by adjusting the turns ratio and winding configurations
Data Source
Figure 1~2
Figure 3
AI summary
A current balancing circuit for electrical machines, comprising an electrical machine, which includes at least two electrical conductors (1, 2, 3, 4), placed in parallel, inside which relative currents (I1, I2, I3, I4) flow, in which the electrical conductors (1, 2, 3, 4) have relative impedances (L1, L2, L3, L4) corresponding to losses proportional to the respective sections of the electrical conductor (1, 2, 3, 4) used; in particular, in series with each pair of electrical conductors (1, 2, 3, 4), there is a component formed by two paths crossed by the currents (I1, I2, I3, I4) of said at least two electrical conductors (1, 2, 3, 4) and by a magnetic circuit (M) of compensation between said two paths.