Superconductive Vortex Valve Switching for High-Voltage Fast Power Electronics
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Solution Overview
Problem
Current power electronics, such as silicon-based devices, face limitations in blocking voltage and switching speed, which are inadequate for next-generation power transmission requirements, particularly in the range of 10-100 kV and 20 kHz with currents above 1 kA, necessitating the development of more efficient switching technologies.
Innovation Solution
The use of superconductive vortex valve (SVV) switches, comprising a thin film of superconducting material on a substrate with a receive antenna, resonant cavity, and broadcast antenna, actuated by RF power and magnetic bias, embedded in a resonant circuit driven by pulse width modulation, enabling fast and efficient switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional antenna-coupled cryotron switches are used, then the device can operate as a superconducting switch, but the switching speed is limited and transition times are slow
Solution Approach 1:
The patent employs resonant oscillation at the natural frequency of the superconducting thin film to induce rapid vortex motion. By driving the system at its resonant frequency, the switching action is amplified and accelerated, achieving transition times below 1 microsecond compared to conventional cryotrons. The resonant cavity and broadcast antenna system creates sustained oscillations that quickly transition the superconducting state.
Solution Approach 2:
The patent uses periodic RF excitation through the broadcast antenna to repeatedly drive the superconducting thin film through vortex states. This periodic action at resonant frequency ensures consistent and reliable switching transitions, with each cycle reinforcing the vortex motion and maintaining predictable transition times. The PWM control applies periodic gating signals to achieve precise switching timing.
2Stress or pressure
If silicon-based power electronics are used, then the devices can handle power transmission, but the blocking voltage and switching speed are insufficient for next-generation requirements
Solution Approach 1:
The patent fundamentally changes the operating parameters by using superconducting materials instead of silicon, enabling operation at cryogenic temperatures where electrical resistance becomes zero. This parameter change allows the system to handle blocking voltages in the 10-100 kV range while achieving switching speeds an order of magnitude faster than silicon-based devices. The superconducting state provides both high voltage tolerance and rapid switching capability simultaneously.
Solution Approach 2:
The patent employs a composite structure combining superconducting thin films with resonant cavity systems and antenna arrays. This composite approach integrates the high-voltage handling capability of superconductors with the rapid energy transfer of resonant electromagnetic fields, creating a system that exceeds the performance limits of conventional single-material power electronics. The combination enables both high blocking voltage and fast switching speed requirements to be met.
3Productivity
If superconductive vortex valve switches are used, then fast switching with transition times below 1 microsecond is achieved, but the device complexity increases with resonant cavity and antenna systems
Solution Approach 1:
The resonant cavity and antenna system serves multiple functions: it provides the driving RF field for vortex induction, acts as the switching control mechanism, and enables rapid energy transfer. This multi-functionality reduces the need for separate control circuits and switching components, offsetting the added structural complexity with functional integration. The same resonant structure that enables fast switching also provides the necessary voltage handling capability.
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 SVV switches achieve high-frequency switching with fast transition times below 1 microsecond and high current handling, exceeding the capabilities of conventional antenna-coupled cryotron switches, with potential for improved energy efficiency and scalability in power electronics.
Implementation Method 1
Superconductors are useful in electronics and electrical devices since they provide the ability to transport electric charges without resistance
Implementation Method 2
A magnetic bias is applied to the thin film of the SVV in a location proximate to the resonant cavity
Implementation Method 3
A resonant cavity is positioned proximate to the substrate, the thin film, and the receive antenna
Implementation Method 4
A broadcast antenna is in electromagnetic connection with the receive antenna, wherein the broadcast antenna is positioned proximate to the thin film
Data Source
AI summary
A superconductive vortex valve apparatus and related methods of operation are disclosed. A superconductive vortex valve (SVV) apparatus has a thin film formed from a superconducting material positioned on a substrate. A receive antenna is positioned on the thin film. A resonant cavity is positioned proximate to the substrate, the thin film, and the receive antenna. A broadcast antenna is in electromagnetic connection with the receive antenna and is positioned proximate to the thin film. A radio frequency (RF) power supply is configured to supply electrical power to the broadcast antenna. A magnetic bias is applied to the thin film in a location proximate to the resonant cavity. The SVV may be embedded within a resonant circuit which may be driven with pulse width modulation (PWM), such as with a resonant circuit driven with PWM which has two PWM-driven resonant circuits in series driven in quadrature.