In many applications, metering components in the pharmaceutical or meals trade for example, pumps are required that not only can be exactly managed in phrases of circulate price and dosing time, but additionally convey the ingredients notably gently. To allow the proven pump units of the ecodos sequence from LEWA GmbH to meet this demanding process with much more flexibility and energy effectivity in the future, the manufacturer is increasing the portfolio to include a model new type of wide-range pace control. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for brief, are additionally used now. They are characterised by high energy efficiency and a control range higher than 1:200. This significantly expands the range of purposes. With PMSMs, it’s not needed to use a number of pumps for various flow charges or oversize asynchronous motors for low speeds. Since PMSMs could be designed and not using a fan, they remain compact and easy to wash. The latter feature predestines them for hygienic functions. High effectivity ranking over the entire control vary in accordance with vitality efficiency class IE5+ also reduces energy costs, thus making certain a decrease whole value of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos series are particularly nicely suited for functions within the meals or pharmaceutical industries. All supplies in touch with the fluids used within the pump models meet the FDA and USP Class VI requirements, and the EU directives for the meals business. In the hygienic model, for example, the pump head is manufactured from PP or electropolished chrome steel with a floor roughness < 0.5 µm. This facilitates cleaning of the surfaces in contact with the product.
เกจ์วัดแก๊สหุงต้ม applied sciences used to date have had to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the management vary stays restricted to 1:10 (1:50 is feasible in particular person cases). With encoder suggestions, important enlargement is possible,” mentioned Maurice Wirkner, an application manager at LEWA. “In addition, the drive is relatively inefficient exterior the rated pace vary – particularly at low speeds. This requires the drive to be outsized, which increases operating costs.” Servomotors are optimized for extremely dynamic requirements and also cowl the entire management vary (1-210 pump strokes), nonetheless, they’re dearer to buy and as well as, require a servo inverter for management.
Wide-range pace management with everlasting magnet synchronous motor extends the range of purposes
LEWA has now expanded its personal portfolio with a drive technology that doesn’t have these weaknesses. “Unlike the asynchronous motor, the rotor of this drive consists of everlasting magnets and rotates synchronously, i.e. without load-dependent slip,” Wirkner defined. “Among other issues, it options an excessive management vary, which frequently makes using a number of pumps for different move charges pointless.” Particularly within the case of a number of pumps, an extra manual stroke adjustment or electrical stroke adjustment could be allotted with and the required flow price could be realized by velocity management only. The PMSM also has a constant torque. The full torque may be applied from engine pace 0 rpm (standstill) up to the rated velocity of the motor. This ensures significantly easy and gentle system start-up, since every process could be began with a pump capacity of 1 p.c as a substitute of the standard 10 %.
It additionally contains a excessive short-term overload capacity, which permits a drive design without oversizing for the starting torque. As a end result, smaller, more cost-efficient sizes could be realized than with classic drives. “Like the asynchronous motor, the PMSM can be controlled via a regular frequency converter, so customers can rely on widespread elements,” Wirkner defined. “With the servomotor on the contrary, it would be essential to buy costly servo controllers.” The compact drive can be easily cleaned as a outcome of its fanless design and offers high IP safety. If required an additional conversion course of – called nsd tupH – may be applied to the aluminum body for FDA necessities. This makes the floor extremely resistant and even easier to wash – best for purposes with stringent hygienic requirements, such as aroma metering in the food trade or additive dosing in the pharmaceutical industry.
IE5+ PMSM enables cost discount and decentralized solutions
The sole limitation of the presently used PMSM is that it is only available for safe areas. “Thanks to wide-range pace management with IE5+ PMSM, we will meet the rising buyer calls for for a wider adjustment vary and lower vitality consumption, in addition to overall prices,” said Wirkner to sum up the scenario. “The matter of power effectivity specifically is changing into increasingly important for our clients. A decentralized answer during which the frequency converter is installed instantly on the PMSM, can now be implemented with Getriebebau NORD GmbH & Co. KG, LEWA’s motor companion for PMSM, too.”
LEWA GmbH was based in 1952 by Herbert Ott and Rudolf Schestag as a family enterprise and is today the world’s leading producer of metering pumps and process diaphragm pumps in addition to full metering packages for course of engineering. Headquartered in Leonberg, the company developed into a world group in just a few many years. Since 2022, the corporate has been a half of the Atlas Copco Group, a globally main Swedish manufacturer of compressors, vacuum options, generators, pumps, power tools and assembly systems. Together with the model new owner, LEWA will additional increase the industrial pumps enterprise. As a research and manufacturing company, LEWA develops applied sciences and provides options for the huge array of purposes amongst its customers. Its products are used mainly in the chemical industry, the cosmetics industry, prescribed drugs and biotechnology, meals and beverage industry and power utilities in addition to in the production of plastics, detergents and cleaners. Additional utility areas embody refineries and petrochemicals, the oil and gas business, and fuel odorization. LEWA at present employs around 1,200 folks and owns 14 subsidiaries all over the world 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 feature a control vary of 1:200, enabling a wider range of purposes to be covered by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a constant torque, i.e. the entire torque could be called up at speed zero rpm. This ensures particularly smooth and delicate system start-up, since each course of could be began with a conveyance fee of 1 p.c as an alternative 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 contrast to the ASMs shown, the constant torque of the PMSM permits continuous operation at low speeds. Oversizing for the required pump beginning torque has become pointless due to 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 through a normal frequency converter (NORD, Danfoss, and so forth.) with particular parameterization, in order that users can depend on widespread elements.
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 options by which the frequency converter is put in instantly on the PMSM are also already potential 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 functional testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the decrease velocity range above all, the PMSM efficiently demonstrated some great advantages of constant torque: the ecodos test pump could 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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