Adelwitz Technologiezentrum GmbH ATZ

Germany

Adelwitz Technologiezentrum GmbH ATZ

Germany
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Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | Wippich D.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | And 5 more authors.
Journal of Physics: Conference Series | Year: 2014

Bruker HTS manufactures YBCO based superconducting wires of the second generation on low- cost Stainless Steel substrate (100 μm thick). With 250-500 A/cm@77 K, SF, 650 MPa tensile strength and 6 mm bending radius excellent electrical and mechanical properties are achieved. As complementation of the 2G fabrication technology an automated 2 km copper pulse plating facility has been installed in 2012. We report here the operation requirements and the experiences of the copper plating technique.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | And 4 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

Adelwitz Technologiezentrum (ATZ) and L-3 Communications Magnet Motor (L-3 MM) are currently mounting a compact-designed flywheel energy storage system (FESS) with total magnetic bearing support. Final assembly and test operation were performed during 2008-2009. After calculations and experiments, we decided to improve rotor stabilization by stiffer geometry. In addition, two dynamical emergency bearings contribute to robust and safe flywheel operation in critical revolution-per-minute situations. A planned energy capacity of 5 kWh is now obtained at about 8000 r/min, whereas an increased capacity of 10 kWh will be stored at a speed of 10000 r/min. The total weight of the flywheel unit is about 1200 kg plus power electronics and cooling system. The heavier 600-kg rotor causes new design and construction work in mechanical elements, magnetic support bearings, cooling, and power electronics. Due to the here reported construction changes and increased rotor speed, scaling to even larger energy storage performance of 1520 kWh seems achievable. ATZ and L-3 MM obtained a corresponding order to develop and deliver a 15-kWh/400-kW high-temperature- superconducting FESS for a Korean local grid UPS application. © 2006 IEEE.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | And 3 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2011

High Temperature Superconducting (HTS) interaction shows a great potential in rotational bearing and linear Maglev technology. Besides the superconductor each application sets additional specific technical requirements. The challenges of use the various constructions and applications in the combination of the cold HTS material and the required technical periphery are discussed. ATZ's 0.5-ton HTS production per annum has enabled increased performance in a number of magnetic applications. Engineering properties, advanced magnetic excitation systems and thermal and mechanical stability of robust high-load YBCO bearings have been demonstrated. Effort is being made in the development of mobile HTS Maglev devices. We have designed and produced advanced 40-cm-long bulk cryostats, having 2-mm magnetic distance to the outside and operating more than one day without refilling. 24 vacuum cryostats have been manufactured for a magnetic train construction capable to transport up to 60-kN total vehicle and passenger weight and dedicated to operate on a 200-mlong track. © 2010 IEEE.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | And 2 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2010

ATZ Company has successfully developed high temperature superconducting (HTS) magnetic bearings for power energy application and high-speed machinery. Journal-type design and improved HTS magnetic properties increasingly fulfill industrial prototype requirements. Maximum load up to 1.1 ton, stiffnesses in 34 kN/mm level, simultaneous self-stabilization in axial and radial directions, large- gap operation of 56 mm and reliable machine cooling in the 5060 K region characterize the present progress of HTS magnetic bearings. A 200 mm HTS bearing of 10 kN load capacity is fabricated and integrated in a 5 kWh/250 kW flywheel energy storage system. We report about a new large-gap HTS magnetic coupling system ensuring 300 mm wafer treatment inside a closed processing chamber in semiconductor industry. A linear MAGLEV transport system consisting of four modular cryostat units have been recently fabricated in a prototyping process. The four HTS cryostats can carry almost 1 ton at 10 mm magnetic gap above a magnetic guideway with a force density of about 5 N/cm2. Due to perfect thermal insulation each cryostat operates more than 24 hours without refilling LN2. © 2006 IEEE.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | And 4 more authors.
Journal of Physics: Conference Series | Year: 2014

The next generation of HTS magnetic bearings (SMB) will operate at magnetic field excitation higher than permanent magnets (> 1.0 T). The new bearing type is capable to support heavy -load rotors of more than one ton mass. Using FEM we calculate the interaction of HTS bulk and 2G coil to achieve higher magnetic flux excitation and flux gradients of HTS bearings at temperatures of 50-60 K. The new total HTS bearing type multiplies the present 10 -15 N/cm 2 force density obtained with PM's by a factor of 5 and passes the force properties of active magnetic bearings (AMB). HTS coil excitation is capable to increases the levitation forces to more than the present 10 kN level and reduces relative cooling and material effort per load. We design a magnetic bearing for HTS bulk -coil excitation. © Published under licence by IOP Publishing Ltd.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | And 3 more authors.
Physics Procedia | Year: 2012

We investigate and review concepts of multi - seeded REBCO bulk superconductors in mobile application. ATZ's compact HTS bulk magnets can trap routinely 1 T@77 K. Except of magnetization, flux creep and hysteresis, industrial - like properties as compactness, power density, and robustness are of major device interest if mobility and light-weight construction is in focus. For mobile application in levitated trains or demonstrator magnets we examine the performance of on-board cryogenics either by LN2 or cryo-cooler application. The mechanical, electric and thermodynamical requirements of compact vacuum cryostats for Maglev train operation were studied systematically. More than 30 units are manufactured and tested. The attractive load to weight ratio is more than 10 and favours group module device constructions up to 5 t load on permanent magnet (PM) track. A transportable and compact YBCO bulk magnet cooled with in-situ 4 Watt Stirling cryo-cooler for 50 - 80 K operation is investigated. Low cooling power and effective HTS cold mass drives the system construction to a minimum - Thermal loss and lightweight design. © 2011 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel- Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | Wippich D.,Adelwitz Technologiezentrum GmbH ATZ | And 2 more authors.
Journal of Physics: Conference Series | Year: 2010

A 5 kWh / 250 kW engineering prototype Flywheel Energy Storage System (FESS) was designed and assembled in a joint project ATZ with L-3 Magnet- Motor Corp. The 0.6 t rotor is magnetically stabilized between a 1 ton magnetic HTS bearing on top and a new PM bearing. Based on the measured bearing load (max. 10000 N), Stiffness (3-4 kN/mm axial, 1.8 kN/mm radial) and rotor eigenfrequency (∼ 6.5 Hz) optimum operating conditions are obtained. For industrial use the flywheel periphery is described and evaluated. A comparison and evaluation showed, both the composite rotor as well the HTS magnetic bearing are utilized more efficient in systems with larger energy storage capacity. This can provide UPS function as well as power quality (load levelling) economically and correspond to industrial requirements and demands. In a third phase starting in 2009 the parameters for larger energy storage capacity 25 - 50 kWh are calculated, investigated and the basic elements studied. © 2010 IOP Publishing Ltd.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | Goebel B.,Adelwitz Technologiezentrum GmbH ATZ | And 3 more authors.
Physica C: Superconductivity and its Applications | Year: 2013

ATZ Company has constructed about 130 HTS magnet systems using high-Tc bulk magnets. A key feature in scaling-up is the fabrication of YBCO melts textured multi-seeded large bulks with three to eight seeds. Except of levitation, magnetization, trapped field and hysteresis, we review system engineering parameters of HTS magnetic linear and rotational bearings like compactness, cryogenics, power density, efficiency and robust construction. We examine mobile compact YBCO bulk magnet platforms cooled with LN2 and Stirling cryo-cooler for demonstrator use. Compact cryostats for Maglev train operation contain 24 pieces of 3-seed bulks and can levitate 2500-3000 N at 10 mm above a permanent magnet (PM) track. The effective magnetic distance of the thermally insulated bulks is 2 mm only; the stored 2.5 l LN2 allows more than 24 h operation without refilling. 34 HTS Maglev vacuum cryostats are manufactured tested and operate in Germany, China and Brazil. The magnetic levitation load to weight ratio is more than 15, and by group assembling the HTS cryostats under vehicles up to 5 t total loads levitated above a magnetic track is achieved.


Werfel F.N.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | And 3 more authors.
Superconductor Science and Technology | Year: 2012

This paper describes the present status of high temperature superconductors (HTS) and of bulk superconducting magnet devices, their use in bearings, in flywheel energy storage systems (FESS) and linear transport magnetic levitation (Maglev) systems. We report and review the concepts of multi-seeded REBCO bulk superconductor fabrication. The multi-grain bulks increase the averaged trapped magnetic flux density up to 40% compared to single-grain assembly in large-scale applications. HTS magnetic bearings with permanent magnet (PM) excitation were studied and scaled up to maximum forces of 10kN axially and 4.5kN radially. We examine the technology of the high-gradient magnetic bearing concept and verify it experimentally. A large HTS bearing is tested for stabilizing a 600kg rotor of a 5kWh/250kW flywheel system. The flywheel rotor tests show the requirement for additional damping. Our compact flywheel system is compared with similar HTS-FESS projects. A small-scale compact YBCO bearing with insitu Stirling cryocooler is constructed and investigated for mobile applications. Next we show a successfully developed modular linear Maglev system for magnetic train operation. Each module levitates 0.25t at 10mm distance during one-day operation without refilling LN 2. More than 30 vacuum cryostats containing multi-seeded YBCO blocks are fabricated and are tested now in Germany, China and Brazil.


Werfel F.,Adelwitz Technologiezentrum GmbH ATZ | Floegel-Delor U.,Adelwitz Technologiezentrum GmbH ATZ | Rothfeld R.,Adelwitz Technologiezentrum GmbH ATZ | Riedel T.,Adelwitz Technologiezentrum GmbH ATZ | And 3 more authors.
Refrigeration Science and Technology | Year: 2014

High Temperature Superconductor (HTS) magnet interaction shows a great potential in rotational bearing and linear magnetic levitation (Maglev) technology. Besides the superconductor each application sets additional specific technical requirements. The challenges of use the various constructions and applications in the combination of the cold HTS material and the required technical periphery of the cryogenics are discussed. Engineering properties, advanced magnetic excitation systems and thermal and mechanical stability of robust high - load YBCO bearings have been demonstrated for a heavy - load flywheel stabilization. Effort is being made in the development of mobile HTS Maglev devices with LN2 in-situ cooling We have designed and produced advanced 40 cm long vacuum cryostats, having 2 mm magnetic distance to the outside and operating more than one day without refilling LN2. Copyright © 2014 IIR/IIF.

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