Multi-Coil Transformer Layout for Efficient Power Conversion
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Solution Overview
Problem
Existing power conversion apparatuses connected to multiple voltage units face inefficiencies in power transmission between primary and secondary coils due to differing power consumption rates across voltage units.
Innovation Solution
A power conversion apparatus with a transformer featuring three or more coils, where the coils are magnetically coupled and arranged in a coil axial direction, with the coil receiving the highest power value positioned adjacent to the high-voltage battery-side coil to enhance magnetic coupling and facilitate efficient power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If coils are arranged in arbitrary positions in the coil axial direction, then the transformer structure is simple, but power transmission efficiency is reduced due to weak magnetic coupling between coils with different power consumption rates
Solution Approach 1:
The patent applies local quality by arranging coils with different power consumption characteristics at specific positions in the coil axial direction. The high-power coil is positioned adjacent to the high-voltage battery-side coil, while the low-power coil is positioned at the opposite end, creating a non-uniform but optimized spatial distribution that matches the local power transmission requirements of each coil position.
Solution Approach 2:
The patent utilizes the coil axial direction as an additional spatial dimension to optimize power transmission. By arranging coils in a specific sequence along the axial direction rather than using a simple radial or planar configuration, the patent creates a three-dimensional optimization strategy that enhances magnetic coupling between coils with different power characteristics.
2Productivity
If coils are arranged to optimize magnetic coupling, then power transmission efficiency is improved, but the coil arrangement becomes more complex
Solution Approach 1:
The patent optimizes power conversion efficiency by creating a localized optimal arrangement where the high-power coil is positioned to maximize magnetic coupling with the high-voltage battery-side coil. This localized optimization approach improves overall system efficiency without requiring complete redesign of the entire transformer structure.
Solution Approach 2:
The patent employs preliminary action by pre-determining the optimal coil arrangement configuration during the design phase. The coil positions are fixed in advance based on power consumption characteristics, eliminating the need for dynamic adjustment during operation and simplifying the overall system while maintaining high efficiency.
3Loss of energy
If coils with different power values are positioned far apart, then interference between coils is reduced, but magnetic coupling and power transmission efficiency deteriorate
Solution Approach 1:
The patent addresses the contradiction between coil interference and magnetic coupling by applying local quality - positioning the high-power coil adjacent to the high-voltage battery-side coil to maximize necessary magnetic coupling, while the low-power coil is positioned at the opposite end where interference is naturally minimized. This creates a spatial distribution that optimizes both coupling efficiency and interference reduction.
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 arrangement enables efficient power transmission between coils, optimizing power flow and reducing leakage inductance, thereby enhancing the overall efficiency of power conversion.
Implementation Method 1
The three or more coils are magnetically coupled with one another and arranged so as to be arrayed in a coil axial direction
Data Source
AI summary
A power conversion apparatus (1) is used so as to be connected to three voltage units. The power conversion apparatus includes three power-conversion circuit units and a transformer (4). The three power-conversion circuit units are respectively connected to voltage units that differ from one another. Three coils (5) of the transformer (4) are connected to power-conversion circuit units that differ from one another. The three coils (5) are magnetically coupled with one another. The three coils (5) are arranged so as to be arrayed in a coil axial direction (z). One of the voltage units is a high-voltage battery. Among the coils other than a high-voltage battery-side coil (51) that is connected to the high-voltage battery, the coil (5) of which a power value that flows thereto is largest is arranged in a position that is adjacent to the high-voltage battery-side coil (51).