In many purposes, metering ingredients in the pharmaceutical or food industry for instance, pumps are required that not solely can be exactly managed in phrases of circulate fee and dosing time, but in addition convey the components notably gently. To enable the confirmed pump units of the ecodos series from LEWA GmbH to satisfy this demanding task with much more flexibility and energy efficiency in the future, the manufacturer is increasing the portfolio to include a model new form of wide-range pace management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are also used now. They are characterised by excessive power efficiency and a control range higher than 1:200. This considerably expands the range of purposes. With PMSMs, it’s not necessary to use several pumps for different move charges or oversize asynchronous motors for low speeds. Since PMSMs may be designed without a fan, they proceed to be compact and easy to clean. The latter function predestines them for hygienic purposes. เกจ์อาร์กอนsumo over the complete management range in accordance with energy effectivity class IE5+ also reduces energy costs, thus ensuring a decrease total cost of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos series are particularly nicely fitted to functions within the meals or pharmaceutical industries. All supplies involved with the fluids used in the pump units meet the FDA and USP Class VI requirements, and the EU directives for the meals trade. In the hygienic model, for example, the pump head is manufactured from PP or electropolished stainless steel with a floor roughness < zero.5 µm. This facilitates cleansing of the surfaces in contact with the product.
The motor applied sciences used thus far have had to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the management range stays limited to 1:10 (1:50 is feasible in individual cases). With encoder feedback, significant growth is possible,” mentioned Maurice Wirkner, an utility supervisor at LEWA. “In addition, the drive is comparatively inefficient outdoors the rated speed vary – especially at low speeds. This requires the drive to be oversized, which increases working costs.” Servomotors are optimized for extremely dynamic necessities and likewise cover the complete management range (1-210 pump strokes), nonetheless, they’re dearer to purchase and as properly as, require a servo inverter for control.
Wide-range pace control with everlasting magnet synchronous motor extends the vary of purposes
LEWA has now expanded its own portfolio with a drive expertise that does not have these weaknesses. “Unlike the asynchronous motor, the rotor of this drive consists of permanent magnets and rotates synchronously, i.e. without load-dependent slip,” Wirkner explained. “Among different issues, it features an extreme control range, which often makes the utilization of multiple pumps for different move rates unnecessary.” Particularly within the case of a number of pumps, an additional manual stroke adjustment or electrical stroke adjustment may be allotted with and the required move fee can be realized by velocity management solely. The PMSM also has a constant torque. The complete torque could be utilized from engine velocity 0 rpm (standstill) up to the rated pace of the motor. This ensures particularly easy and gentle system start-up, since each course of could be started with a pump capability of 1 p.c instead of the standard 10 percent.
It also features a high short-term overload capability, which permits a drive design without oversizing for the starting torque. As a end result, smaller, extra cost-efficient sizes can be realized than with basic drives. “Like the asynchronous motor, the PMSM can be controlled through a regular frequency converter, so users can rely on common elements,” Wirkner explained. “With the servomotor quite the opposite, it will be essential to purchase expensive servo controllers.” The compact drive could be simply cleaned due to its fanless design and provides high IP safety. If required an additional conversion course of – called nsd tupH – can be applied to the aluminum physique for FDA requirements. This makes the floor extraordinarily resistant and even simpler to clean – ideal for purposes with stringent hygienic necessities, corresponding to aroma metering in the meals business or additive dosing in the pharmaceutical industry.
IE5+ PMSM permits value reduction and decentralized solutions
The sole limitation of the currently used PMSM is that it is just obtainable for secure areas. “Thanks to wide-range speed management with IE5+ PMSM, we are able to meet the increasing buyer demands for a wider adjustment range and decrease power consumption, in addition to general costs,” said Wirkner to sum up the situation. “The topic of energy effectivity in particular is becoming more and more important for our clients. A decentralized answer by which the frequency converter is installed immediately on the PMSM, can now be implemented with Getriebebau NORD GmbH & Co. KG, LEWA’s motor companion for PMSM, too.”
LEWA GmbH was founded in 1952 by Herbert Ott and Rudolf Schestag as a household enterprise and is at present the world’s main manufacturer of metering pumps and process diaphragm pumps in addition to complete metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a global group in just a few a long time. Since 2022, the corporate has been a half of the Atlas Copco Group, a globally main Swedish producer of compressors, vacuum options, generators, pumps, power instruments and meeting techniques. Together with the brand new owner, LEWA will additional expand the economic pumps enterprise. As a research and manufacturing company, LEWA develops technologies and provides options for the huge array of functions amongst its prospects. Its products are used primarily in the chemical trade, the cosmetics trade, pharmaceuticals and biotechnology, food and beverage trade and power utilities as nicely as in the manufacturing of plastics, detergents and cleaners. Additional application areas embody refineries and petrochemicals, the oil and fuel industry, and gasoline odorization. LEWA currently employs round 1,200 people and owns 14 subsidiaries around the globe alongside having 80 representatives and sales offices in additional than 80 countries.
Image materials:
Image ID: LEWA ecodos LED3 WBR.jpg
Caption: LEWA ecodos LED3 with PMSM
Source: LEWA GmbH
Image ID: ecodos_NORD-IE5plus_opt.jpg
Caption: The PMSMs newly added to the portfolio function a management range of 1:200, enabling a wider vary of purposes to be covered by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM also has a constant torque, i.e. all the torque could be known as up at speed 0 rpm. This ensures significantly easy and mild system start-up, since each process can be started with a conveyance price of 1 % as a substitute of the same old 10 %. (Example: Metering omega three fatty acids within the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the fixed torque of the PMSM allows continuous operation at low speeds. Oversizing for the required pump beginning torque has turn out to be unnecessary because of the excessive overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be controlled via a regular frequency converter (NORD, Danfoss, and so forth.) with special parameterization, in order that users can rely on frequent components.
Source: Getriebebau NORD GmbH & Co. KG
Image ID: NORDAC ON Wandmontage BG2_806x502Web.jpg / Nordac ON+ with frequency converter on an IE5 PMSM.jpg
Caption: Decentralized solutions during which the frequency converter is installed instantly on the PMSM are also already possible with the PMSMs chosen by LEWA.
Source: Getriebebau NORD GmbH & Co. KG
Image ID: Functional testing.jpg
Caption: As early as 2020, LEWA carried out preliminary useful testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the decrease speed range above all, the PMSM successfully demonstrated the benefits of fixed torque: the ecodos take a look at pump could be pushed in a variety of 1:480 as much as 5 bar.
Source: LEWA GmbH
More info for readers/viewers/interested events:
LEWA GmbH
Ulmer Straße 10, 71229 Leonberg, Germany
Phone: +49 7152 14-0, Fax: +49 7152 14-1303
Email: lewa@lewa.de
Internet: www.lewa.de
More data for members of the press
ABOPR Pressedienst B.V.
Stefan-George-Ring 19, 81929 Munich, Germany
Phone: +49 89 500315-20, Fax: +49 89 500315-15
Email: info@abopr.de
Internet: www.abopr.de
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