Wide-range Speed Control for Diaphragm Metering Pumps: LEWA ecodos collection with new motor

In many applications, metering elements in the pharmaceutical or meals industry for example, pumps are required that not solely could be precisely controlled by way of move price and dosing time, but additionally convey the elements notably gently. To enable the confirmed pump units of the ecodos sequence from LEWA GmbH to satisfy this demanding activity with even more flexibility and energy efficiency in the future, the producer is increasing the portfolio to include a new type of wide-range pace management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by excessive energy effectivity and a management range higher than 1:200. This significantly expands the vary of applications. With PMSMs, it’s no longer necessary to make use of several pumps for various circulate rates or oversize asynchronous motors for low speeds. Since PMSMs can be designed and not utilizing a fan, they remain compact and simple to clean. The latter function predestines them for hygienic applications. High efficiency rating over the complete management vary in accordance with vitality effectivity class IE5+ additionally reduces vitality costs, thus guaranteeing a lower complete cost of possession (TCO).
pressure gauge ราคา metering pumps in the LEWA ecodos sequence are significantly nicely suited to purposes within the food or pharmaceutical industries. All materials involved 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 version, for example, the pump head is made of PP or electropolished stainless-steel with a surface roughness < zero.5 µm. This facilitates cleansing of the surfaces in touch with the product.
The motor technologies used so far have needed to make sacrifices: “For basic 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 suggestions, vital growth is possible,” mentioned Maurice Wirkner, an application manager at LEWA. “In addition, the drive is comparatively inefficient outdoors the rated speed range – especially at low speeds. This requires the drive to be outsized, which will increase operating costs.” Servomotors are optimized for highly dynamic requirements and also cowl the whole control vary (1-210 pump strokes), however, they’re costlier to purchase and in addition, require a servo inverter for control.
Wide-range velocity control with everlasting magnet synchronous motor extends the range of applications
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. with out load-dependent slip,” Wirkner defined. “Among different things, it options an excessive management range, which often makes the use of multiple pumps for different circulate charges unnecessary.” Particularly within the case of multiple pumps, a further guide stroke adjustment or electric stroke adjustment may be allotted with and the required circulate price could be realized by speed management only. The PMSM also has a continuing torque. The complete torque may be applied from engine velocity 0 rpm (standstill) up to the rated pace of the motor. This ensures significantly easy and gentle system start-up, since every course of may be started with a pump capability of 1 p.c as an alternative of the usual 10 %.
It additionally contains a excessive short-term overload capability, which permits a drive design with out 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 managed via a normal frequency converter, so customers can rely on widespread elements,” Wirkner defined. “With the servomotor on the contrary, it will be necessary to buy costly servo controllers.” The compact drive can be simply cleaned due to its fanless design and provides high IP protection. If required a further conversion process – referred to as nsd tupH – may be utilized to the aluminum physique for FDA requirements. This makes the floor extraordinarily resistant and even simpler to clean – perfect for applications with stringent hygienic requirements, corresponding to aroma metering in the food trade or additive dosing in the pharmaceutical business.
IE5+ PMSM allows value discount and decentralized options
The sole limitation of the presently used PMSM is that it’s only available for safe areas. “Thanks to wide-range speed control with IE5+ PMSM, we are able to meet the increasing customer demands for a wider adjustment vary and lower power consumption, in addition to overall prices,” said Wirkner to sum up the scenario. “The matter of energy efficiency in particular is turning into more and more necessary for our customers. A decentralized resolution by which the frequency converter is installed instantly on the PMSM, can now be carried out with Getriebebau NORD GmbH & Co. KG, LEWA’s motor partner for PMSM, too.”
LEWA GmbH was founded in 1952 by Herbert Ott and Rudolf Schestag as a family business and is right now the world’s main manufacturer of metering pumps and process diaphragm pumps as nicely as complete metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a world group in just some many years. Since 2022, the company has been a part of the Atlas Copco Group, a globally main Swedish manufacturer of compressors, vacuum solutions, generators, pumps, energy instruments and meeting techniques. Together with the new owner, LEWA will additional broaden the commercial pumps business. As a analysis and manufacturing company, LEWA develops technologies and provides solutions for the huge array of functions amongst its clients. Its merchandise are used primarily within the chemical business, the cosmetics industry, prescription drugs and biotechnology, food and beverage business and energy utilities in addition to within the production of plastics, detergents and cleaners. Additional utility areas embody refineries and petrochemicals, the oil and gas trade, and fuel odorization. LEWA at present employs around 1,200 folks and owns 14 subsidiaries around the world alongside having 80 representatives and gross sales workplaces in more 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 control vary of 1:200, enabling a wider vary of applications to be coated by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM additionally has a constant torque, i.e. all of the torque may be referred to as up at pace zero rpm. This ensures notably smooth and delicate system start-up, since each process may be began with a conveyance rate of 1 % as an alternative of the standard 10 percent. (Example: Metering omega three fatty acids within the production of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the constant torque of the PMSM enables steady operation at low speeds. pressure gauge 4 นิ้ว ราคา for the required pump starting torque has become unnecessary due to the excessive overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM may be managed through a standard frequency converter (NORD, Danfoss, and so forth.) with special parameterization, in order that customers 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 put in immediately on the PMSM are additionally already attainable 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 check bench. In the lower pace range above all, the PMSM successfully demonstrated the benefits of constant torque: the ecodos take a look at pump could possibly be driven in a spread of 1:480 as a lot as 5 bar.
Source: LEWA GmbH
More data for readers/viewers/interested events:
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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