In many purposes, metering components in the pharmaceutical or food industry for instance, pumps are required that not solely may be precisely controlled by method of flow price and dosing time, but also convey the components particularly gently. To enable the confirmed pump units of the ecodos sequence from LEWA GmbH to meet this demanding task with even more flexibility and power effectivity sooner or later, the producer is increasing the portfolio to include a new form of wide-range pace control. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by excessive power efficiency and a management range larger than 1:200. This significantly expands the range of applications. With PMSMs, it’s now not needed to make use of a quantity of pumps for different circulate rates or oversize asynchronous motors for low speeds. Since PMSMs may be designed without a fan, they remain compact and simple to scrub. The latter feature predestines them for hygienic purposes. High effectivity ranking over the whole control vary in accordance with power efficiency class IE5+ also reduces vitality costs, thus ensuring a decrease whole price of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos series are significantly well fitted to applications in the meals or pharmaceutical industries. All materials involved with the fluids used within the pump models meet the FDA and USP Class VI necessities, and the EU directives for the food business. In the hygienic model, for instance, the pump head is manufactured from PP or electropolished stainless-steel with a floor roughness < 0.5 µm. This facilitates cleaning of the surfaces involved with the product.
The motor applied sciences used to date have had to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the control range stays restricted to 1:10 (1:50 is feasible in particular person cases). With encoder feedback, important expansion is feasible,” stated Maurice Wirkner, an software supervisor at LEWA. “In addition, the drive is relatively inefficient outside the rated speed vary – particularly at low speeds. This requires the drive to be oversized, which will increase operating prices.” Servomotors are optimized for highly dynamic necessities and in addition cover the whole management vary (1-210 pump strokes), nevertheless, they are dearer to buy and as properly as, require a servo inverter for management.
Wide-range velocity control with everlasting magnet synchronous motor extends the range of functions
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 everlasting magnets and rotates synchronously, i.e. with out load-dependent slip,” Wirkner defined. “Among other issues, it features an excessive management vary, which regularly makes the use of multiple pumps for different flow rates pointless.” Particularly within the case of a quantity of pumps, an additional manual stroke adjustment or electric stroke adjustment could be allotted with and the required circulate rate could be realized by velocity management solely. The PMSM also has a continuing torque. The complete torque can be utilized from engine pace zero rpm (standstill) as a lot as the rated pace of the motor. This ensures particularly easy and delicate system start-up, since every process may be began with a pump capability of 1 percent instead of the standard 10 %.
It additionally contains a high short-term overload capability, which permits a drive design without oversizing for the starting torque. As a end result, smaller, more cost-efficient sizes can be realized than with classic drives. “Like the asynchronous motor, the PMSM may be controlled by way of a regular frequency converter, so customers can rely on common elements,” Wirkner explained. “With the servomotor quite the opposite, it would be essential to buy expensive servo controllers.” The compact drive may be simply cleaned due to its fanless design and presents excessive IP safety. If required an additional conversion process – known as nsd tupH – could be applied to the aluminum physique for FDA requirements. This makes the floor extremely resistant and even easier to scrub – perfect for applications with stringent hygienic necessities, similar to aroma metering in the meals industry or additive dosing within the pharmaceutical business.
IE5+ PMSM enables cost discount and decentralized solutions
The sole limitation of the at present used PMSM is that it is only available for protected areas. หลักการทำงานของเกจ์วัดแก๊ส to wide-range velocity control with IE5+ PMSM, we will meet the increasing buyer demands for a wider adjustment vary and decrease power consumption, as nicely as total prices,” said Wirkner to sum up the situation. “The topic of power effectivity specifically is changing into more and more important for our prospects. A decentralized solution during which the frequency converter is put in directly on the PMSM, can now be applied with Getriebebau NORD GmbH & Co. KG, LEWA’s motor associate for PMSM, too.”
LEWA GmbH was founded in 1952 by Herbert Ott and Rudolf Schestag as a family enterprise and is at present the world’s leading producer of metering pumps and process diaphragm pumps as nicely as 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 part of the Atlas Copco Group, a globally main Swedish producer of compressors, vacuum options, mills, pumps, power instruments and meeting systems. Together with the model new proprietor, LEWA will further expand the commercial pumps business. As a research and manufacturing company, LEWA develops applied sciences and provides solutions for the vast array of applications among its prospects. Its products are used primarily within the chemical industry, the cosmetics industry, prescription drugs and biotechnology, meals and beverage trade and energy utilities in addition to in the production of plastics, detergents and cleaners. Additional software areas include refineries and petrochemicals, the oil and fuel business, and gas odorization. LEWA currently employs round 1,200 folks and owns 14 subsidiaries around the globe alongside having 80 representatives and gross sales offices in more than eighty 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 feature a management range of 1:200, enabling a wider vary of applications to be coated by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM also has a continuing torque, i.e. all the torque may be referred to as up at pace zero rpm. This ensures significantly smooth and delicate system start-up, since every process could be started with a conveyance fee of 1 percent instead of the standard 10 %. (Example: Metering omega 3 fatty acids within the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the constant torque of the PMSM permits steady operation at low speeds. Oversizing for the required pump starting torque has become pointless as a end result of excessive overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM may be controlled by way of a normal frequency converter (NORD, Danfoss, and so on.) with particular parameterization, in order that users can depend on common 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 in which the frequency converter is put in immediately on the PMSM are additionally 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 practical testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the lower speed range above all, the PMSM successfully demonstrated the benefits of constant torque: the ecodos check pump could probably be pushed in a variety of 1:480 as a lot as 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 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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