Grooved Quadrilateral Electric Wire for High Frequency Current
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Solution Overview
Problem
Electric vehicles face high electric power consumption due to increased resistance in traditional electric wires when conducting high-frequency currents, leading to high temperatures and inefficient energy use, and existing solutions like Litz wires are cumbersome and unsuitable for high-voltage applications.
Innovation Solution
An electric wire design featuring a conductive wire with grooves and additional wires inserted along its longitudinal direction, enhancing surface area and reducing resistance, made from materials like copper and aluminum to efficiently conduct high-frequency and high-voltage currents while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If Litz wire is used to reduce skin effect loss, then electric power loss is reduced, but the wire becomes difficult to wind densely and coil size increases
Solution Approach 1:
The wire surface is segmented into multiple grooves that divide the surface into distinct regions. This segmentation increases the effective surface area for current flow while maintaining a compact wire structure that can be wound densely into coils, resolving the contradiction between reducing skin effect losses and maintaining compact coil size.
Solution Approach 2:
The invention adds a longitudinal dimension to the wire surface by creating grooves that extend along the wire length. This dimensional change increases the effective surface area available for current flow without significantly increasing the wire's cross-sectional area, allowing dense winding while reducing skin effect losses.
2Device complexity
If traditional electric wire is used, then the structure is simple, but resistance increases at high temperatures leading to high electric power consumption
Solution Approach 1:
The wire structure incorporates local quality variations through grooves with specific dimensions and patterns tailored to the expected current frequency and magnitude. These localized structural modifications optimize electrical performance at high temperatures without requiring complete redesign of the entire wire structure, balancing complexity and energy efficiency.
3Power
If wire diameter is increased to handle high-voltage large current, then current carrying capacity is improved, but the motor size and vehicle weight increase
Solution Approach 1:
The wire incorporates a porous-like structure with grooves that increase the effective surface area and internal volume for current flow. This allows the wire to handle high-voltage large current with a smaller external diameter, reducing motor size and vehicle weight while maintaining current carrying capacity.
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 effectively reduces electrical power loss and maintains low resistance even at high temperatures, enabling efficient energy transmission for electric vehicles and cordless inductive power supplies without the need for multiple charger types.
Implementation Method 1
it is well known that loss of a high-frequency current is large while the current is flowing through a conducting wire because the current gathers around a surface of the conducting wire due to the skin effect
Implementation Method 2
made from materials like copper and aluminum to efficiently conduct high-frequency and high-voltage currents
Data Source
AI summary
An electric wire for improving the adhesion force between the adjacent winding wires of a coil is described. The electric wire of the present invention may include a conductive wire with a substantially quadrilateral cross-sectional shape. The electric wire further includes a first groove and a second groove positioned diagonally at two opposite corners of the quadrilateral along a longitudinal direction of the conductive wire. An adhesive pocket filled with an adhesive is sized to fit within each of the first and second grooves at diagonally arranged opposite corners.