Current research projects

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Image Intelligent innovative power supply for superconducting coils
Image Electrical components in refrigeration circuits
Image Innovative small helium liquefier
Image Lifetime prediction of hermetic compressor systems
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Image In-situ investigation concerning the swelling behaviour of polymer materials under elevated pressures and temperatures
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Intelligent innovative power supply for superconducting coils

Dr. Andreas Kade

+49-351-4081-5117

Compact, powerful power supply with 4-quadrant converter

The aim of the R&D project is the development of an intelligent innovative power supply as a 4-quadrant controller and energy storage device, which consists of a communicating system between quench protection and current flow control at the superconductor. The development shall be characterized by safety, compactness, accuracy, user friendliness, good price-performance ratio and modularity. The combination of cryogenic and warm electronics will provide significant advantages.
The functional model developed and constructed for this purpose has the following parameters and properties:

  • 4-quadrant power supply with ± 25 V and ± 14 kA
  • Constant voltage quench protection system
  • Cryogenic switch (cryogenic)
  • Energy storage system

The components for the energy storage system consists of individual cells with a capacity of 3000 F and a voltage of 2.7 V. 51 modules are connected in parallel, each with 10 individual cells, to form a capacitor bank. This results in a capacity of 15,300 F and a voltage of 25 V. A 3 kA, 30 V device serves as power supply, which has already been successfully tested on a cryogenic power supply.
In the next step, the configured capacitor modules for the energy storage and the boards of the 4-quadrant controller, see Figure 1, were combined in three switch cabinets, see Figure 2. The completed switch cabinet is shown in Figure 3. First results were presented at the 16th Cryogenics in October 2021.
 


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Further Projects

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Investigation of material-dependent parameters

Investigation of the permeation behavior

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Cool Up

Upscaling Sustainable Cooling

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Breakthrough Sensor for Adsorption Filters (BelA)

Sensor system for detecting an imminent breakthrough in gas filtration

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Ionocaloric cooling

Ionocaloric solid-liquid phase cooling process

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Low temperature – test facilities

thermal cycling tests at very low temperatures