1 year ago

MDA Technologies 5/2015

MDA Technologies 5/2015

New heart beating in all

New heart beating in all Nord inverters Nord Drivesystems will equip all motor-mounted and cabinetinstalled frequency inverters with new, more versatile microcontrollers. Notably, this upgrade enables the inverters originally designed for asynchronous motors to also control synchronous motors, which is becoming increasingly important. There are substantial benefits: for instance, customers who have been using IE3 motors with an encoder can save energy and costs by switching to IE4 motors without an encoder. Moreover, new Nord inverters are capable of performing drive-related PLC functions, which can significantly relieve external controllers. In some cases, previously used mini-controllers may even become redundant. The inverters support the manufacturer-independent PLCopen function blocks for motion control. They can be freely programmed according to IEC 61131-3 in “Structured Text” or “Instruction List”. This makes application development less complex and reduces the associated costs. Customer-specific drive-related functions can be implemented by means of the inverter PLC without an application-specific firmware and free from cost-intensive verification and validation. KTR extends portfolio of hydraulic brakes The new KTR-STOP XL generates clamping forces up to 600 kN, can be used in the low temperature range down to - 40 °C and is suitable for applications in the Offshore sector. The split brake pads of this hydraulically operated brake, generate a high percentage contact area, thus having a low surface pressure. As a result the coefficient of friction rises with the braking force increasing. The brake pads are available in organic or powder metal material. To facilitate the replacement of pads on the side which is often difficult to access, the pads on the fixed caliper side are fastened with magnets. For that purpose it is only necessary to unscrew the screws located on the sides, the pad retainers are removed and the pads are pulled out sidewards. Another special feature is the setting screws installed in the brake pistons: If the brake pads have worn off, they allow for fast setting or re-setting with pressurized condition. It is provided with a respective corrosion protection. Also, all vital components are fully encapsulated. With this new product, KTR has an extensive portfolio of hydraulically operated, passive floating caliper brakes with a range of a clamping force from 2 to 1,400 kN. Linear ball bearings with longer service life The requirements for linear guidance technology has increased in the recent past - above all with regard to load bearing capacity, stiffness and service life. At the same time, the users demand lowest possible assembly and maintenance requirement. SKF has been manufacturing linear ball bearings for this market for more than 40 years. Now the company is introducing the next generation of its linear ball bearing LBC in the market: The new D-series, which absorbs up to 15% more dynamic loads - depending on the size - when compared with the previous model. This increases results mainly from an optimisation of path geometry and use of larger rolling element. In addition, the higher load bearing capacity of D-series, available for shaft diameters of 12, 16, 20, 25, 30 and 40 mm in all common variants, offers the possibility of creating more compact designs or to implement a larger resilience with unchanged size. Internationally approved sensors and displacement transducers from Balluff Devices which are used in explosive environments require an explosion approval. This is also applicable for sensors and position sensors. Balluff offers a portfolio of touchless, measuring and magnetostrictive micropulse displacement transducers and sensors for various explosion zones. The micropulse displacement transducers have certifications such as ATEX (EU), IECEx (international), NEC (US) and CEC (Canada). For instance, the new micropulse displacement transducer BTL 7 is part of the portfolio. It is used in the monitoring of hydraulic and pneumatic cylinders. The explosion portfolio is completed with inductive sensors BES and high pressure-resistant inductive sensors BHS (oil pressure-resistant up to 500 bar). End position controls for hydraulic cylinders and monitoring of valve positions are part of its scope of application. MDA Technologies 5/2015 31

RUBRIZIERUNGSEBENE I RUBRIZIERUNGSEBEBE 2 Electrically-powered system tractors for sustainable agriculture Dietmar Schrägle Large agricultural machines increase productivity in farming, but also compacts the soil quantity and quality. 7 Dutch farmers set off on a search to a solution for this problem and together, they created a new innovation. In collaboration with the Machinefabriek Boessenkool, Wissels Techniek and Van Ham Organisation & Consultancy, they developed the Multi Tool Trac. The Multi Tool Trac is an electrically-powered tractor for efficient and sustainable agriculture. The tractor reduces the amount of work for farmers and increases the yield. The Multi Tool Trac is an equipment carrier with a completely electrical drive line, and a 6-cylinder diesel engine with 140 kW, as range extender. The diesel, drives a STW powerMELA-C 160 kW generator Author: Dietmar Schrägle, Project Manager, Sensor-Technik Wiedemann GmbH which supplies the drive. Sensor-Technik Wiedemann GmbH (STW) has been supplying components for mobile electrical hybrid systems for years. “It is the first electrical system tractor which makes agricultural work easier and more sustainable, and which retains the natural soil quality in its optimum form“, explains Managing Director Paul van Ham. A 30 kW/h traction battery is connected for work of up to half an hour in the field. The modern Li-Ion battery is able to double the power of the complete drive for a few minutes, thus providing the vehicle with increased thrust power. The four wheels, which are equal in size, are powered by one electrical wheel hub motor and one reduction gear unit each. A permanently excited 32 MDA Technologies 5/2015


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