Parallel Auxiliary Winding Reactor Design for High-Frequency Performance
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Solution Overview
Problem
Existing reactors face challenges in achieving a compact size, low cost, and high frequency characteristics due to high distributed capacitance and direct current resistance, which complicates their design and manufacturing process.
Innovation Solution
A reactor design featuring a pair of auxiliary winding elements with multilayered and aligned coil segments, connected in parallel, reduces distributed capacitance and direct current resistance, allowing for a compact and simplified structure with improved high-frequency performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the number of windings is increased to achieve high inductance, then the inductance L is improved, but the distributed capacitance C0 becomes high and the resonance frequency f0 becomes low
Solution Approach 1:
The reactor is divided into a first reactor and a second reactor, each with its own winding unit. These units are connected in parallel, allowing each unit to have fewer windings while achieving the desired total inductance. This segmentation reduces the distributed capacitance in each unit, thereby maintaining a high resonance frequency and good high-frequency characteristics.
Solution Approach 2:
The first reactor and second reactor are connected in parallel to combine their inductance effects. The parallel connection achieves the desired total inductance value while each individual unit maintains low distributed capacitance, thus resolving the contradiction between high inductance and high resonance frequency.
2Length of stationary object
If the number of windings is increased to achieve high inductance, then the inductance L is improved, but the direct current resistance Rdc becomes high and the current loss increases
Solution Approach 1:
The total inductance requirement is segmented between two parallel-connected reactor units. Each unit requires fewer windings to achieve its portion of the total inductance, which directly reduces the DC resistance of each winding unit. The parallel connection combines their effects to meet the overall inductance specification.
Solution Approach 2:
By connecting the first and second reactors in parallel, the effective DC resistance is reduced through the parallel combination of multiple winding paths. This merging approach achieves the desired inductance while minimizing total current loss.
3Reliability
If a rectangular wire with large width is used to reduce distributed capacitance, then the resonance frequency f0 is improved, but the cost increases and the number of assembling steps increases
Solution Approach 1:
The reactor is segmented into two separate winding units connected in parallel. Each unit can use conventional round wire with standard winding techniques, avoiding the need for expensive rectangular wire and complex assembly processes. The segmentation allows each unit to be manufactured independently using simpler, more cost-effective methods.
Solution Approach 2:
The invention uses conventional, inexpensive round wire instead of expensive rectangular wire. The parallel connection of two standard winding units achieves the same electrical performance without requiring costly specialized components or complex assembly procedures.
4Loss of energy
If the winding wire thickness is increased to reduce direct current resistance, then the direct current resistance Rdc is improved, but the winding becomes difficult and the compactization is compromised
Solution Approach 1:
The current path is segmented into two parallel winding units. Each unit can use thinner wire that is easier to wind, while the parallel connection reduces the overall DC resistance. This approach maintains ease of manufacturing with standard wire thickness while achieving low resistance through the parallel configuration.
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 design achieves a higher resonance frequency and lower direct current resistance, enabling a reactor with a good high-frequency characteristic and simplified structure, while maintaining low costs and ease of manufacturing.
Implementation Method 1
The resonance frequency f0 at which resonance takes place at the inductance L and distributed capacitance C0 of the winding unit (coil)
Implementation Method 2
the resonance frequency f0 at which resonance takes place at the inductance L and distributed capacitance C0 of the winding unit (coil)
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
A reactor is provided in which coil segments (5-1, 5-2) of each of first and second auxiliary winding elements (2-1, 2-2) is of a multilayered and aligned winding structure. The coil segments (5-1, 5-2) of the first auxiliary winding element (2-1) and the coil segments (5-1, 5-2) of the second auxiliary winding element (2-2) are disposed within respective space areas (6-1, 6-2) delimited between the coil segments of the second auxiliary winding element and an outside and between the outside and the coil segments of the first auxiliary winding element. The coil segments of each of those first and second auxiliary winding elements are so combined as to be adjacently alternately positioned in a line to thereby form a main winding body (3). The pair of the auxiliary winding elements are connected parallel to each other.