In many functions, metering ingredients within the pharmaceutical or meals business for instance, pumps are required that not only can be exactly controlled by method of circulate rate and dosing time, but in addition convey the ingredients significantly gently. To enable the confirmed pump units of the ecodos collection from LEWA GmbH to satisfy this demanding process with even more flexibility and energy effectivity in the future, the manufacturer is increasing the portfolio to include a model new form of wide-range speed control. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by high energy effectivity and a control vary larger than 1:200. This considerably expands the vary of functions. With PMSMs, it’s no longer necessary to use several pumps for different move rates or oversize asynchronous motors for low speeds. Since PMSMs may be designed and not utilizing a fan, they continue to be compact and easy to clean. The latter function predestines them for hygienic applications. High efficiency ranking over the complete management range in accordance with energy effectivity class IE5+ also reduces power prices, thus guaranteeing a decrease complete price of ownership (TCO).
The diaphragm metering pumps within the LEWA ecodos series are significantly nicely fitted to applications in the food or pharmaceutical industries. All materials in touch with the fluids used in the pump items meet the FDA and USP Class VI necessities, and the EU directives for the food trade. In the hygienic model, for instance, the pump head is manufactured from PP or electropolished stainless-steel with a surface roughness < zero.5 µm. This facilitates cleansing of the surfaces in contact with the product.
The motor technologies used thus far have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the management range stays restricted to 1:10 (1:50 is possible in particular person cases). With encoder feedback, vital growth is possible,” mentioned Maurice Wirkner, an application manager at LEWA. “In addition, the drive is relatively inefficient exterior the rated velocity range – especially at low speeds. This requires the drive to be oversized, which will increase working costs.” Servomotors are optimized for extremely dynamic requirements and in addition cowl the whole management vary (1-210 pump strokes), however, they’re dearer to purchase and as nicely as, require a servo inverter for management.
Wide-range pace control with permanent magnet synchronous motor extends the vary of applications
LEWA has now expanded its personal portfolio with a drive technology that does not have these weaknesses. “Unlike the asynchronous motor, the rotor of this drive consists of permanent magnets and rotates synchronously, i.e. with out load-dependent slip,” Wirkner defined. “Among other things, it features an extreme management vary, which often makes using a number of pumps for different circulate charges pointless.” Particularly in the case of multiple pumps, an extra guide stroke adjustment or electric stroke adjustment can be dispensed with and the required move fee can be realized by pace management solely. The PMSM also has a constant torque. The full torque may be utilized from engine speed zero rpm (standstill) as much as the rated velocity of the motor. This ensures significantly smooth and gentle system start-up, since each course of could be began with a pump capability of 1 % instead of the similar old 10 percent.
It also features a excessive short-term overload capability, which permits a drive design without oversizing for the beginning torque. As a end result, smaller, more cost-efficient sizes could be realized than with basic drives. “Like the asynchronous motor, the PMSM may be controlled by way of a regular frequency converter, so customers can depend on frequent parts,” Wirkner defined. “With the servomotor quite the opposite, it will be essential to purchase expensive servo controllers.” The compact drive can be easily cleaned due to its fanless design and presents high IP safety. If required an additional conversion process – referred to as nsd tupH – can be utilized to the aluminum body for FDA requirements. This makes the floor extremely resistant and even simpler to wash – perfect for functions with stringent hygienic necessities, corresponding to aroma metering within the meals trade or additive dosing within the pharmaceutical trade.
IE5+ PMSM allows เกจ์แรงดัน and decentralized options
The sole limitation of the presently used PMSM is that it is only obtainable for safe areas. “Thanks to wide-range pace management with IE5+ PMSM, we will meet the rising customer demands for a wider adjustment vary and lower energy consumption, as nicely as overall costs,” stated Wirkner to sum up the state of affairs. “The subject of power effectivity in particular is turning into increasingly necessary for our clients. A decentralized solution by which the frequency converter is installed instantly on the PMSM, can now be implemented with Getriebebau NORD GmbH & Co. KG, LEWA’s motor partner for PMSM, too.”
LEWA GmbH was based in 1952 by Herbert Ott and Rudolf Schestag as a household business and is today the world’s leading producer of metering pumps and course of diaphragm pumps in addition to complete metering packages for process engineering. Headquartered in Leonberg, the company developed into an international group in just a few a long time. Since 2022, the corporate has been part of the Atlas Copco Group, a globally leading Swedish manufacturer of compressors, vacuum solutions, mills, pumps, energy tools and meeting methods. Together with the model new owner, LEWA will further expand the economic pumps business. As a analysis and manufacturing firm, LEWA develops applied sciences and provides options for the vast array of purposes amongst its prospects. Its merchandise are used primarily within the chemical industry, the cosmetics trade, prescription drugs and biotechnology, meals and beverage business and energy utilities as well as in the production of plastics, detergents and cleaners. Additional application areas embody refineries and petrochemicals, the oil and gas business, and gasoline odorization. LEWA currently employs round 1,200 individuals and owns 14 subsidiaries around the globe alongside having 80 representatives and gross sales places of work in more than 80 countries.
Image material:
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 vary of 1:200, enabling a wider range of functions to be lined by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM also has a constant torque, i.e. all of the torque could be referred to as up at velocity 0 rpm. This ensures notably smooth and delicate system start-up, since each course of could be started with a conveyance rate of 1 percent instead of the identical old 10 p.c. (Example: Metering omega three fatty acids in the manufacturing of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs proven, the fixed torque of the PMSM enables steady operation at low speeds. Oversizing for the required pump beginning torque has turn into 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 could be managed by way of a regular frequency converter (NORD, Danfoss, and so forth.) with special parameterization, so that users can rely on frequent parts.
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 by which the frequency converter is installed directly on the PMSM are also already attainable with the PMSMs selected by LEWA.
Source: Getriebebau NORD GmbH & Co. KG
Image ID: Functional testing.jpg
Caption: As early as 2020, LEWA carried out preliminary functional testing with the NORD PMSM prototype and an ecodos pump on the pump check bench. In the lower pace vary above all, the PMSM successfully demonstrated some great benefits of fixed torque: the ecodos take a look at pump might be pushed in a spread of 1:480 up to 5 bar.
Source: LEWA GmbH
More data for readers/viewers/interested parties:
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 info 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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