Power Conversion Device Parallel Conductor Layout
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Solution Overview
Problem
Power conversion devices for electric and hybrid vehicles face challenges in downsizing while ensuring insulating performance and suppressing surge voltage, as wide conductor plates are required to reduce inductance, leading to increased mounting area and insufficient insulation.
Innovation Solution
A power conversion device with an isolation transformer and conductors arranged parallel to each other to prevent overlapping, reducing parasitic capacitance and thus suppressing surge voltage while allowing for downsizing and maintaining insulating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If wide conductor plates are used to reduce inductance and suppress surge voltage, then surge voltage is suppressed, but mounting area increases and insulating performance cannot be ensured
Solution Approach 1:
The patent transitions from planar conductor plate arrangement to a three-dimensional configuration where conductors are arranged in different layers with vertical separation. The first and second conductors are positioned at different heights above the insulating substrate, utilizing the vertical dimension to reduce parasitic capacitance while maintaining compact horizontal footprint.
Solution Approach 2:
The patent introduces an insulating substrate as an intermediary between the first and second conductors. This mediator provides electrical insulation and physical separation, enabling the conductors to be positioned closer together horizontally while maintaining adequate insulation, thus reducing inductance without compromising insulating performance.
2Object-affected harmful factors
If wide conductor plates are brought close to each other to reduce inductance, then inductance decreases, but insulating performance becomes insufficient
Solution Approach 1:
The patent resolves the insulation problem by moving the separation from purely horizontal to a combination of horizontal and vertical dimensions. Conductors are arranged in different layers with vertical spacing, allowing closer horizontal proximity for reduced inductance while maintaining adequate total separation distance for insulation through the vertical dimension.
Solution Approach 2:
The patent employs a composite structure consisting of conductive elements positioned over an insulating substrate. This composite arrangement combines the electrical conductivity needed for low inductance with the insulating properties of the substrate, achieving both low inductance and reliable insulation simultaneously.
3Object-affected harmful factors
If conductor arrangement prevents overlapping to reduce parasitic capacitance, then surge voltage is suppressed, but mounting area increases
Solution Approach 1:
The patent eliminates parasitic capacitance by preventing conductor overlap in the horizontal plane, and simultaneously compensates for the area increase by utilizing vertical spacing. The three-dimensional arrangement allows conductors to be separated in the vertical dimension, maintaining compact horizontal footprint while achieving the non-overlapping condition needed to minimize parasitic capacitance.
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 effectively decreases parasitic capacitance between conductors, reducing surge voltage and enabling downsizing without compromising insulating performance, thereby addressing the limitations of existing technologies.
Implementation Method 1
the parasitic capacitance to be generated between the first conductor and the second conductor can be decreased
Implementation Method 2
the energy of the drive battery is supplied to the auxiliary battery via the isolation transformer
Data Source
AI summary
Provided is a power conversion device including: an isolation transformer (107) including a first winding and a second winding; switching elements (101 to 104) to be connected to the first winding of the isolation transformer (107); a first conductor (105) configured to connect one end of the first winding of the isolation transformer (107) to the switching elements (101 and 102); and a second conductor (106) configured to connect another end of the first winding of the isolation transformer (107) to the switching elements (103 and 104), the first conductor (105) and the second conductor (106) being arranged on an insulating substrate (301) so as to be parallel to each other so that the first conductor (105) and the second conductor (106) are prevented from overlapping each other.