DRIVES, CONTROLS & TRANSMISSIONS PRODUCTS ASEPTIC DRIVES KEEP FOOD PRODUCTION LINES CLEAN
Problem: a leading European fruit processor needed to improve its glass jar filling line and specify equipment which would meet its strict hygiene standards and offer improved energy efficiency. Its reputation depends on careful control of several manufacturing aspects including maintenance of a hygienic manufacturing environment. When the jam and fruit spread production line needed replacing it was necessary to source aseptic drives in order to maintain the very high standards. Solution: Bauer Gear Motor’s IE3 aseptic drive solutions met all of the client’s requirements. Aseptic drives are designed for applications where regular washdowns are required to maintain a clean environment. The motor is designed so that a fan and cooling ribs are not required, allowing for a completely smooth outer casing with a non-drive end which is sealed. This eliminates dirt traps on
the motor casing and prevents re- infection of the local environment caused by air movement from a cooling fan. A high level of ingress protection (up to IP69K) is a special designation for washdown applications involving high pressure, high temperature water. In addition, the aseptic drive is painted using an acid and alkali resistant formula which can withstand chemicals with a pH range of 2-12. As a result the drive system can withstand the cleansing solutions and disinfectants commonly used in the food industry without affecting performance. Design engineers at Bauer developed a combination of aseptic motor/gearbox packages with variable frequency drives (VFDs) to enable a very efficient package to be installed. The majority of the drives used 0.75kW motors with some smaller 0.55kW units and nearly 80% of them were coupled to the BK20 hollow shaft
bevel gearboxes. All of the aseptic motors from Bauer are rated IE3 energy efficiency class and when combined with the VFD they can deliver optimum energy consumption and running costs. By designing a system with a
large number of common components the engineers were able to minimise the spare parts inventory while ensuring the most energy efficient and reliable design. In addition, the motor itself is
equipped with thermistors and class F insulation which makes it suitable for control by VFD and the thermistor connections are combined with the motor connections in a round stainless steel product which allows quick and simple motor connection while maintaining the hygienic aspect.
Bauer Gear Motor T: +49 711 3518276
www.bauergears.com Enter 318
INVERTER DRIVE OPERATES IN HARSHEST WORKING CONDITIONS
Atlas Copco has designed its first inverter drive. All of the company’s GA 37-90 VSD range compressors will be equipped with Neos units which will be available as spare parts for retrofitting existing GA models. Neos has been tailored precisely to meet current and predicted requirements of its compressors in terms of size, simplicity, robustness and reliability. Only 5% of off-the-shelf electric motors and inverters available to OEMs are used in compressors. The majority are
designed for a broad variety of applications with less demanding torque requirements than those of heavy duty compressor operations. During the development of the
inverter rigorous endurance field testing was conducted in a variety of hot, cold and dusty industrial conditions which involved running units up to 10,000 hours at maximum load. The performance of 16 drive units installed on a mix of 55, 75 and 90kw standard and full-feature compressors were compared in application sites as
varied as Finland, Bahrain, Spain, Sweden, Germany and Belgium. These tests proved conclusively that the Neos unit is capable of operating in the the harshest working conditions at continuous full load from -20°C up to 50°C ambient temperatures and is fully protected against dust ingress by its IP 5X rated enclosure.
Atlas Copco T: 01442 261201
www.atlascopco.co.uk Enter 319
Enter 16 / FACTORYEQUIPMENT FACTORY EQUIPMENT | JULY/AUGUST 2014 23
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