Superconducting DC Reactor Toroid Bobbin Design
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Solution Overview
Problem
Conventional DC reactors for HVDC transmission systems have high current loss due to coil resistance, large volume, and weight, limiting their efficiency and practicality.
Innovation Solution
A superconducting DC reactor with a toroid-shaped first bobbin and coil blocks surrounding the outer peripheral face, utilizing a high temperature superconducting coil and a prevention disc plate to minimize external magnetic field and reduce current ripple and harmonics, replacing conventional copper coils with low magnetic permeability materials like BSCCO or YBCO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a copper coil is used to form the conventional large capacity DC reactor, then the inductance can be achieved, but the resistance of the copper causes high current loss and the volume and weight become significantly large
Solution Approach 1:
The patent changes the electrical resistance parameter from high (copper) to zero (superconductor) by changing the material state to superconducting condition, thereby eliminating I²R losses completely while maintaining the required inductance function
Solution Approach 2:
The patent uses composite construction combining superconducting material with magnetic core materials to create a DC reactor that achieves high inductance with minimal energy loss, leveraging the complementary properties of both materials
2Power
If a copper coil is used to form the conventional large capacity DC reactor, then the inductance can be achieved, but the entire volume and weight are significantly large
Solution Approach 1:
The patent changes the material parameter from conventional copper to superconducting material, which allows achieving the same inductance capacity with dramatically reduced weight and volume due to the ability to carry much higher current density
3Power
If a copper coil is used to form the conventional large capacity DC reactor, then the inductance can be achieved, but the entire volume and weight are significantly large
Solution Approach 1:
The patent changes the current carrying capacity parameter by using superconducting material, which enables compact winding designs that achieve the required inductance in a much smaller volume compared to conventional copper coil designs
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 significantly reduces current loss, volume, and weight of the DC reactor, enhancing its efficiency and applicability in HVDC transmission systems by leveraging the properties of high temperature superconducting materials.
Implementation Method 1
a high temperature superconducting coil that winds the outer peripheral face of the second bobbin
Data Source
AI summary
A DC reactor consisting of a coil formed of a superconducting material is provided. It is possible to reduce leakage reactance and to increase critical current by using a coil formed of a high temperature superconducting material and forming a first bobbin of the DC reactor as a toroid shape.