Siemens is extending its portfolio of Simotics synchronous-reluctance motors to include the two new shaft heights, AH90 and AH225. With these new additions, the company is addressing calls from renowned manufacturers of pumps.

The motors are available in a power range of 0.55 to 45 kW, and now also with rated speeds of 1,500 and 3,000 min¹. In conjunction with the recently launched Sinamics Reluctance Control License, precise encoderless closed-loop torque control is possible down to a standstill. The license enables field-oriented (vector) closed-loop control even when at a standstill – reliably eliminating the possibility of the synchronous motor “stalling” at any time even if the load inertia is not known.

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The new Sinamics G120 Smart Access Module enables the wireless connection of mobile devices such as tablets, smartphones or laptops over WiFi to the Sinamics G120, Sinamics G120C and Sinamics G120P pump converter series, making for considerably simpler converter handling.

The module is set up in a few simple steps using a conventional web browser and any standard operating system. The web server functionality eliminates the need to download any additional software. With its intuitively structured user interface and menu guidance, the module offers outstanding user convenience.

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Jochen Pelzer

Technical paper by Jochen Pelzer

The coupling of drives with work machines like pumps, fans and compressors is simple – at least at first glance. Because, while for selection of the right coupling knowledge of torque and speed are theoretically sufficient, practice shows that plenty of experience and high-quality products increase availability and reduce service costs.

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The Sure-Flex Plus couplings have new elastomeric sleeves providing higher performance and enhanced durability due to significant improvements in proprietary EPDM and Neoprene materials. Development testing confirmed that the new EPDM and Neoprene rubber sleeves enable a 30 % increase in the torque rating when compared to the previous generation sleeves. Sure-Flex Plus couplings provide torsional flexibility, while the 4-way flexing action absorbs virtually all types of

• shock,
• vibration,
• misalignment and
• end float.

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Fig. 1

The generation of maintainers who check the condition of pumps on a daily basis by listening and touching the equipment is dying out. Nevertheless, pumps must operate reliably. To solve this problem, BestSens has developed the Bearing Monitoring System, BeMoS for short (Figure 1).

BeMoS monitors roller bearings in machinery and plants from the very first second of operation. What is so special about it is the underlying technology:

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The Sinamics G120 is the universal drive to address the widest range of application requirements such as pump drives. Siemens is extending its portfolio of Sinamics G120 converters to include a new frame size, the FSG with voltage ranges from 380 to 480 volts (V) and from 500 to 690 V.

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Marc Egelwisse

In the Arpex all-steel multi-disk coupling the Flender GmbH, a 100 %-held Siemens subsidiary, is marketing a coupling that has proved itself over many years. Marc Egelwisse, product manager for Arpex couplings, and his team have further developed this series with a focus on three aspects:

• increase in the specific power,
• optimisation of the areas of application and
• reduction of complexity of the type series.

The results show it was worth it:

• 70 to 100 % higher torque,
• 40 % greater angular misalignment,
• 10 % higher maximum speed and
• 14 instead of the 42 design variants existing hitherto.

“Because of the high torque capacity and the optimised speed and bore capacity of the new N-Arpex we are confident that we are offering what is at present the world’s best-performing coupling”, says Egelwisse.

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For the smallest converter in its portfolio, the Sinamics V20, Siemens is now offering an extension module for the capture and output of digital and analog signals. The Sinamics V20 I/O extension module is mounted on the converter using Plug&Play technology, and provides two additional input and output interfaces, each for 400 volts., increasing both the flexibility and the scope of the Sinamics V20. Using connecting ports on the front and back, the extension module can also be combined with additional accessories from the Sinamics V20 portfolio. These include for instance the BOP (Basic Operator Panel) and the BOP interface module.

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Starting October 1, 2017, the Siemens Mechanical Drives unit (MD) will be operating in the market as Flender GmbH, a Siemens Company. Branches will also take on the new name worldwide. The new setup is to be completed worldwide by mid-2018.

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