MaNuK - Magnetisable slot lock wedges consistently further developed!

MaNuK - Magnetisable slot lock wedges consistently further developed!

MaNuK -
Magnetisable slot-locking wedges consistently thought through!

The material and production expertise of M&D Composites Technology GmbH helps to make heavy things light, but it also helps to make electrical machines more efficient and smoother-running. The MaNuK development project will make a new generation of magnetisable slot lock wedges available. The development project is funded by the Federal Ministry for Economic Affairs and Climate Protection (BMWK) via the Central Innovation Programme for SMEs (ZIM).
Slot locking wedges are used in electrical machines with open slots in the laminated core to fix and protect the winding. The wide slot openings in the laminated core, which increase the magnetically effective air gap between the stator and rotor, cause an undesirable local weakening of the magnetic field. Magnetic slot closure wedges counteract this by improving flux guidance. The main result is a reduction in the required magnetising current and consequently a better power factor as well as an increase in the efficiency and smooth running of the electric machine.

The magnetic slot lock keys (mNVK) available today have considerable potential for improvement in terms of their magnetic performance and mechanical properties - premature failure is often the cause of system damage and downtime.
The specialist for lightweight components M&D Composites Technology GmbH from East Frisia, whose initiative initiated this development project, aims to improve the technical properties of magnetic slot locking wedges (mNVK) and significantly reduce unit costs by utilising continuous production processes, making them particularly attractive for electrical machine manufacturers. ‘Until now, our focus has not necessarily been on applications in the field of electrical machines or in the field of electrical insulation in general,’ says Gregor Müller, Managing Director of M&D Composites Technology GmbH, ‘this shows how expertise from classic lightweight construction can also be utilised for applications in the field of electrical machines. The market as a whole is of a very interesting size and is attractive enough for us to offer special solutions and gain a foothold in this application area.’

The MaNuK project is a co-operation project between the partners M&D Composites Technology GmbH, Schill & Seilacher ‘Struktol’ GmbH, FISCO GmbH, the Institute for Drive Systems and Power Electronics (IAL) at Leibniz Universität Hannover and the Institute for Polymer Materials and Plastics Technology (PuK) at Clausthal University of Technology.
The main objectives of the research project are as follows.
In order to optimise the magnetic properties, the focus is on producing a targeted flux guide, testing the magnetisation requirement/power factor and determining the efficiency. Measurements of test specimens are used to formulate dimensioning guidelines and rules as well as analytical functions to describe the permeability. ‘We at the Institute of Drive Technology and Power Electronics at LU Hannover (IAL) can use calculation tools to calculate and visualise corresponding example machines based on conventional and the new type of mNVK,’ says Martin Gerlach, who will be supporting the project on behalf of the IAL. Not only does the continuous production process that will be used require customised resins, but new ferritic components will also be necessary to make the planned processing possible. To this end, the consortium will draw on the many years of experience of Schill & Seillacher - Struktol.
Another development goal is to improve strength, with a particular focus on analysing fatigue strength and service life as well as increasing reliability. ‘PuK's research focuses on the interrelationships between filler conditioning, the structure of the magnetic slot lock wedge and its magnetic properties, which form the basis for the new structural design of the slot lock wedge and the development of a new, continuous and significantly more economical and resource-efficient manufacturing process to eliminate the previous disadvantages,’ says Hendrik Detampel, who will be working intensively on this task for the Institute of Polymer Materials and Plastics Technology (PuK) at Clausthal University of Technology.
The development goal of a continuous and significantly more cost- and resource-efficient production process is essential for the future economic success of the new mNVK.
In FISCO GmbH, a development partner has been found for the MaNuK research project that has already successfully demonstrated its ability to realise continuous production solutions for highly filled resins with highly abrasive solids in connection with other products and applications.

The consortium of the research project MaNuK - ‘Magnetic slot closure wedges in continuous production processes’ officially started its work on 24 February as part of a kick-off event. The project is scheduled to be completed by the end of 2023.
Interested producers and manufacturers of electrical machines are welcome to contact the project manager Axel Rademann, M&D Composites Technology GmbH in Friedeburg, at any time to discuss the basic technical requirements for mNVK.

Patient couches made of CFRP for imaging procedures

Patient couches made of CFRP for imaging procedures

Patient tables for imaging procedures - super light - minimal weakening - highly resilient!

For imaging examination procedures in medical technology, such as PET, SPECT, CRT and MRI, the necessary image quality is a key factor in determining the examination time and the resulting costs.

MD Composites Technology can supply OEMs with high-performance couches that are functionally designed for the best possible integration in the system with convenient handling and minimal attenuation. All materials used are consistently orientated towards maximum radiolucency and minimum attenuation. The construction and design in accordance with DIN EN 60601 allows personal loads of over 250kg. Particularly noteworthy because the design is freely suspended and does not require additional supporting mechanisms to avoid deflection. Thin CFRP laminates also help to significantly reduce the overall weight of the tables and the resulting possible production processes without glued seams create a high-quality product for medical technology in lightweight construction. At the same time, we are helping the imaging procedures to significantly improve the cost-effectiveness and quality of the examination results. All in all, a trend-setting product. Flexible in its shape, dimensions and load-bearing capacity, the patient stretcher presented by the MDC differs significantly from the products known on the market.

MD Composites Technology - We make the heavy light and give shape to the complex!

AGRILIGHT joint project receives state funding

AGRILIGHT joint project receives state funding

AGRILIGHT joint project receives government funding
New ideas for the frame structure of agricultural machinery

Friedeburg /Clausthal/Hannover/Spelle, 24 June 2021 - How can the often very heavy frame of large agricultural machinery be sustainably further developed while significantly reducing the weight of the frame structure? The joint project ‘AGRILIGHT’, in which Maschinenfabrik Krone, M+D Composites Technology GmbH, Leibniz Universität Hannover and Clausthal University of Technology are involved, is looking into this question. The project is being funded by the German Federal Ministry for Economic Affairs and Energy with almost 1.8 million euros. The four project partners involved have now been notified accordingly.
In the course of the ‘AGRILIGHT’ project, the very heavy frame structure including the adjacent functional units of a Krone forage harvester will first be analysed and rebuilt and comprehensively tested in a function-integrating lightweight construction kit made of glass fibre and carbon fibre composites (GRP/CFRP). The particular challenge here lies in the combination of the various new materials, some of which differ fundamentally in their mechanical, electrical and chemical material properties. At the same time, fibre composites require different manufacturing processes, but also offer new shaping possibilities, such as those known from the aviation industry.
As soon as an initial functional model of the new frame has been constructed, it is subjected to extensive tests in special test benches that simulate real-life use. The test results obtained here can then be used to make well-founded statements about the potential suitability of the lightweight frame for series production.
If the project partners succeed in making the frame significantly lighter using new composite materials and new moulding, this would be a groundbreaking step for the entire agricultural machinery industry: a lower overall weight of the machine would also have the effect of significantly reducing fuel consumption and greenhouse gas emissions. The AGRILIGHT team could thus make an enormously important contribution to sustainability in agriculture.

EVO-FOIL – Project

EVO-FOIL – Project

The material and production expertise of MD Composites Technology GmbH is needed to drive forward the development of tidal turbine foils (blades) The development project is funded by the Federal Ministry for Economic Affairs and Energy (BMWi) via the Central Innovation Programme for SMEs (ZIM).

The specialist for lightweight components MD Composites Technology GmbH from Ostfriesland and Sustainable Marine Energy from Canada, the expert for maritime renewable energies and the Leibniz Universität Hannover Institute of Production Engineering and Machine Tools are the 3 development partners in this international and transatlantic development project.

The EvoFoil project aims to deliver a range of design innovations to optimise the performance of tidal turbine foils while reducing production and operating costs.

Sustainable Marine will receive research and development funding from the National Research Council of Canada Industrial Research Assistance Programme (NRC IRAP) for the two-year project. In addition, the German partners in this project will receive funding from the German Federal Ministry for Economic Affairs and Energy (BMWi) through the Central Innovation Programme for SMEs (ZIM).

‘The project will address key areas of film design, including tip geometry and overall composition with a new “multi-material” concept. It will allow us to conduct an extensive field and laboratory test campaign, combining decades of knowledge and experience from all industries to take our tidal foil technology to the next level,’ said Ralf Starzmann, Head of Power Systems at Sustainable Marine.

‘Our German partners bring strong expertise in their respective fields, including world-class knowledge from the aerospace and wind energy industries. We believe that there are several important interventions that can be made to further optimise our foil performance and further promote development in the tidal energy market. These design factors will play an important role in areas such as energy harvesting, power curve degradation and operation and maintenance costs, EvoFoil represents another important step in lowering the cost of energy while reinforcing the importance of tidal energy as a competitive future energy source.’

In early 2021, Sustainable Marine launched its new 420kW PLAT-I 6.40 floating tidal energy platform in the Bay of Fundy, Nova Scotia, Canada, which will be part of the world's first floating tidal energy array. The device is currently undergoing operation and testing in Grand Passage before being deployed at the Fundy Ocean Research Centre for Energy (FORCE).

The site experiences some of the most extreme tidal ranges in the world - with 115 billion tonnes of water flowing in and out twice a day - creating a resource that could generate around 7GW of electricity.

‘While the Bay of Fundy provides tremendous natural energy, it also places a range of environmental conditions on the tidal turbine foils, including thermal changes, corrosion and abrasion, and contributes to hydrodynamic loads during operation,’ said Tim Markwald, Managing Director of M&D Composites Technology. ‘Our mission with the EvoFoil project is to drive innovation to work in harmony with these immense natural forces. This includes innovative manufacturing methods to reduce production costs. In addition, we are researching different surface treatments to protect the rotor blades from erosion.’

‘We are currently researching a new material concept to improve the mechanical behaviour of the film and counteract the various stresses,’ said Carsten Schmidt Leibniz Leibniz Universität Hannover Head of the High-Performance Production of CFRP Structures research group.

‘This multilayer concept is influenced by studies on the current carbon fibre reinforced plastic foil structure and the scientific findings of the German Research Foundation's “Multilayer-Insert” project. The innovation will allow the load-bearing areas of the foil to be partially reinforced with thin metal sheets, which will improve the fit to the turbine drive shaft, increasing durability and strength. Intensive work is now underway to manage the increase in scaling and geometric complexity of the metallic inserts and to achieve proper load transfer from the foil root to the turbine hub.’

The project comes at a time when the German and Canadian governments have recently intensified their efforts to explore the joint development of green hydrogen from Canadian renewables for export to Germany. Tidal turbine technology will be able to make a major contribution to this.

2021 04 05 EVO FOIL Projekt 300x225

Sustainable Marine Adopts German Aerospace and Wind Energy Technology to Advance Tidal Turbine Foils

It doesn't always have to be at a distance ...

It doesn't always have to be at a distance ...

Both mobile and stationary medium-voltage equipment can be designed to be light, compact and environmentally friendly. The very good insulation strength of the materials used also allows the system components to be installed in very confined spaces. A construction made of fibre composite materials offers excellent electrical insulation properties in addition to very good mechanical strength. The design freedom of such fibre composite structures, combined with a clever arrangement of all components, allows a significant reduction in the otherwise necessary distances between electrical potentials. At the same time, equipment weighing several tonnes can be supported. Dynamic loads that mobile equipment is exposed to when being moved or transported by road, rail or water can also be safely controlled. The picture shows a support structure developed jointly with EESYST GmbH to hold oil and iron-free coils for a wind turbine test facility. MD Composite Technology GmbH's expertise in design, calculation and layout, combined with its expertise in the selection of suitable materials and production options, contributed to this project. The result is a high-performance, utility model-protected product that can be customised to meet individual requirements.

Image

Approach

MD Group Logo