September 2019

www.hpmag.co.uk HYDRAULICS & PNEUMATICS September 2019 21 an issue. This goes hand in hand with a longer service life for the hydraulic medium as the oil ages more slowly due to a reduction in mechanical stress. The benefits are: Lower costs in terms of operating materials and improved availability thanks to longer maintenance intervals. The extended service life of the fluid, due to the targeted use of hydraulics, also avoids any excessive increase in ambient temperature— through an overall reduction in power loss. And any reduction in “waste heat” is good news for OEMs and machinery operators, who will have less to worry about in terms of controlling or reducing rising temperature levels in their processes. Kollmorgen also makes a valuable contribution to reducing heat input on the motor side due to the fact the highly efficient AKM servo motors keep thermal power losses low. The synchronous servo motors also operate without separate fans. No brake power applied to hydraulics The negative impact of heat on longevity and energy efficiency can also be felt beyond partial load and standby scenarios—namely when hydraulics themselves are subject to braking forces. Hainzl uses Kollmorgen technology for things like handling tasks within intralogistics processes, where heavy steel parts need to be raised and lowered. With a centralised hydraulics system, the kinetic energy generated during lowering can only be taken up via the oil in the form of heat. The consequences are those described— and may even include additional cooling measures, which only further reduce the overall efficiency of a machine (think OEE). “The electrohydraulic system developed jointly with Kollmorgen makes it possible to transfer braking energy directly to the motor,” explained Schrenk. This gives the Austrians the option to feedback braking energy, particularly during constantly repeated lowering sequences, in a way that is elegant and (more importantly) energy efficient. The bottom line With the ready-made servo pump drive solution, Kollmorgen has developed a new functionality for electrohydrostatic actuators (EHAs) based on the S700 series of servo drives. The software-based application can be easily adapted to the specific features of the application at hand by setting the relevant parameters at the engineering stage. This means the benefits of EHAs can be exploited without having to consider the possible restrictions associated with existing centralised hydraulics arrangements. Kollmorgen is supporting this approach with a drive solution designed to be modular but, above all, open and which can be easily integrated into existing automation setups. www. Kollmorgen.com . Living technology Atam. . integration and reliability , in terms of choice, exibility that will meet and exceed your needs e switches essur sensors and digital pr along with high performance industrial oduced, e also pr TEX-IECEx coils ar A e and nal armatur Encapsulated, exter or IP69K moulded cable options. in both IP65 self-assembly and IP67 onic functions with many additional electr e incorporated along of materials ar connecting systems. A diverse range esulting in advanced and highly versatile r ecision; evolution with quality and pr Atam combines technological Atam (UK) Ltd. atam.uk.co sales@atam.uk.com 6060 7632 024 : T arwickshir W- Nuneaton e The Fluid Power Centr 6BQ CV11 - e eet atling Str - W Setup for an electro hydraulics unit from Hainzl with servo drive technology from Kollmogren