Asymmetric Reactor Core Layout for Higher Inductance
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Solution Overview
Problem
Reactor designs for vehicles, such as hybrid vehicles, face challenges in achieving high inductance, which is essential for storing larger magnetic energy, as existing configurations do not effectively optimize the placement of the winding portion relative to the magnetic core to enhance inductance.
Innovation Solution
The reactor design incorporates a magnetic core with a middle core portion divided into two parts, where the relative magnetic permeability of the second middle core portion is higher than the first, and the winding portion is positioned closer to the second middle core portion, increasing inductance by adjusting the relative permeability difference and the distance between the winding and core centers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the winding portion is positioned at the center of the middle core portion, then the structure is symmetric and easy to manufacture, but the inductance is not maximized
Solution Approach 1:
The patent applies asymmetry by intentionally positioning the winding portion closer to the second middle core portion than to the first middle core portion. This asymmetric placement optimizes the magnetic flux distribution and increases the inductance by utilizing the higher relative magnetic permeability of the second middle core portion, thereby resolving the contradiction between symmetric manufacturing ease and inductance optimization.
Solution Approach 2:
The patent applies local quality by creating different magnetic permeability regions within the middle core portion. The first and second middle core portions have different relative magnetic permeabilities, and the winding portion is strategically placed in the region with higher permeability (closer to the second middle core portion), allowing each region to contribute optimally to the overall inductance.
2Reliability
If the relative magnetic permeability of the second middle core portion is increased, then the inductance increases, but the magnetic flux distribution becomes uneven
Solution Approach 1:
The patent applies local quality by creating distinct regions with different magnetic permeabilities (first middle core portion with lower permeability and second middle core portion with higher permeability). The winding portion is positioned closer to the high-permeability region, allowing concentrated magnetic flux generation where needed while the lower permeability region provides structural balance and prevents excessive flux concentration, thus resolving the contradiction between high inductance and flux distribution stability.
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
This configuration effectively increases inductance, allowing for a larger magnetic energy storage capacity while reducing leakage magnetic flux losses and improving assembly workability, enabling a more compact and efficient reactor design.
Implementation Method 1
a relative magnetic permeability of the second middle core portion being larger than that of the first middle core portion
Implementation Method 2
a coil including a winding portion and a magnetic core including a middle core portion, the winding portion being arranged on the middle core portion
Data Source
AI summary
A reactor comprising a coil that has a wound portion and a magnetic core that has a middle core portion, wherein the wound portion is disposed on the middle core portion, the middle core portion is divided into a first middle core portion and a second middle core portion in a direction along the axis of the wound portion, the relative magnetic permeability of the second middle core portion is larger than the relative magnetic permeability of the first middle core portion, and the central position of the wound portion in a direction along the axis thereof is positioned in a region that is closer to the second middle core portion in comparison to the central position of the middle core portion in a direction along the axis thereof.