Electric Vehicle Inverter Cable Segmentation for Oscillation Isolation
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Solution Overview
Problem
Existing electric vehicle designs face challenges in absorbing phase differences between oscillation systems of the motor and battery, leading to thicker cables and potential interference, which complicates the absorption of oscillations and affects the durability and reliability of components.
Innovation Solution
The electric vehicle design includes an inverter unit connected to the battery by a separate cable from a branch unit, which is independently connected to the battery, allowing for separate cable arrangements and preventing cable thickness issues, while also incorporating a relay and fuse configuration that enhances reliability and maintenance accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the branch unit is integrated into the inverter unit and a single cable supplies power to both the motor and charge circuit, then device complexity is reduced, but the cable diameter becomes thick and oscillation absorption capability deteriorates
Solution Approach 1:
The patent divides the power supply system into two separate cable routes: one cable connects the battery to the inverter unit for motor power, and another cable connects the battery to the branch unit for charge circuit power. This segmentation prevents cable diameter from becoming excessively thick while maintaining organized cable arrangement.
Solution Approach 2:
The branch unit is extracted from the inverter unit and positioned as a separate component. This extraction allows the power supply paths to be separated, enabling each cable to have appropriate thickness for its specific function while improving oscillation absorption capability.
2Power
If the cable diameter is increased to supply power to multiple components, then power supply capacity is improved, but the cable becomes less flexible and oscillation absorption is impaired
Solution Approach 1:
The power supply is segmented into multiple separate cables, each optimized for its specific power requirements. The cable connecting the battery to the inverter unit has appropriate diameter for motor power, while the cable to the branch unit has diameter suitable for charge circuit power, both maintaining flexibility for oscillation absorption.
3Volume of moving object
If the branch unit is positioned above the inverter unit for compact layout, then space efficiency is improved, but maintenance accessibility may be reduced
Solution Approach 1:
The branch unit is positioned above the inverter unit in the vertical dimension, creating a compact three-dimensional layout. This vertical arrangement optimizes space utilization while the patent ensures maintenance accessibility through proper cable routing and component positioning that allows service personnel to access both units efficiently.
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 absorbs phase differences, prevents cable interference, enhances durability by isolating the relay from motor oscillations, and facilitates easier maintenance by allowing for compact layout and space-efficient cable arrangement.
Implementation Method 1
The cable absorbs a phase difference that is caused by the difference of the oscillation system by deformation (hereinafter, referred to as an 'oscillation absorption').
Data Source
AI summary
An electric vehicle includes: a motor that is arranged on a first side of front and rear sides of a vehicle; a rechargeable electric source that is arranged closer to a vehicle room than the motor; an inverter unit that includes an inverter which is fixed to the motor and which is configured to control and drive the motor by electric power that is supplied from the electric source; a charge circuit for charging the electric source; and a first unit that is fixed to a vehicle body at the first side of the vehicle, wherein the inverter unit is connected to the electric source by a cable, and the first unit is connected to the electric source by a cable that is independent of the cable which connects together the inverter unit and the electric source.