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

In many functions, metering ingredients in the pharmaceutical or food business for instance, pumps are required that not solely can be exactly managed by method of circulate price and dosing time, but in addition convey the elements particularly gently. To enable the confirmed pump units of the ecodos series from LEWA GmbH to meet this demanding task with much more flexibility and power effectivity sooner or later, the producer is increasing the portfolio to incorporate a model new type 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 vitality effectivity and a management vary greater than 1:200. This significantly expands the range of functions. With เกจไนโตรเจนsumo , it is no longer essential to make use of a quantity of pumps for various circulate rates or oversize asynchronous motors for low speeds. Since PMSMs may be designed and not utilizing a fan, they remain compact and simple to scrub. The latter function predestines them for hygienic applications. High efficiency rating over the entire control vary in accordance with power effectivity class IE5+ also reduces power costs, thus guaranteeing a decrease total cost of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos series are notably nicely suited for purposes in 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 food trade. In the hygienic model, for example, the pump head is made of 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 so far have had to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the management vary remains restricted to 1:10 (1:50 is feasible in particular person cases). With encoder suggestions, significant growth is possible,” stated Maurice Wirkner, an utility manager at LEWA. “In addition, the drive is comparatively inefficient exterior the rated pace vary – especially at low speeds. This requires the drive to be oversized, which increases operating costs.” Servomotors are optimized for highly dynamic requirements and also cowl the entire management range (1-210 pump strokes), however, they’re more expensive to purchase and as properly as, require a servo inverter for control.
Wide-range speed control with permanent magnet synchronous motor extends the vary of applications
LEWA has now expanded its own portfolio with a drive know-how 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 defined. “Among different things, it options an excessive control vary, which frequently makes the use of multiple pumps for different move charges unnecessary.” Particularly in the case of a quantity of pumps, an additional handbook stroke adjustment or electric stroke adjustment could be allotted with and the required flow price may be realized by speed control only. The PMSM additionally has a constant torque. The full torque could be utilized from engine velocity zero rpm (standstill) up to the rated speed of the motor. This ensures notably easy and mild system start-up, since every process could be started with a pump capability of 1 p.c as an alternative of the usual 10 p.c.
It also contains a excessive short-term overload capability, which allows a drive design with out oversizing for the beginning torque. As a outcome, smaller, extra cost-efficient sizes can be realized than with traditional drives. “Like the asynchronous motor, the PMSM can be controlled via a regular frequency converter, so customers can depend on frequent elements,” Wirkner explained. “With the servomotor on the contrary, it would be necessary to buy costly servo controllers.” The compact drive may be simply cleaned because of its fanless design and offers excessive IP protection. If required an additional conversion course of – referred to as nsd tupH – could be applied to the aluminum physique for FDA necessities. This makes the surface extremely resistant and even simpler to wash – perfect for purposes with stringent hygienic necessities, corresponding to aroma metering in the food business or additive dosing in the pharmaceutical trade.
IE5+ PMSM allows value discount and decentralized solutions
The sole limitation of the currently used PMSM is that it is only out there for secure areas. “Thanks to wide-range pace management with IE5+ PMSM, we will meet the increasing customer calls for for a wider adjustment range and lower vitality consumption, as nicely as general prices,” stated Wirkner to sum up the state of affairs. “The subject of energy effectivity in particular is changing into increasingly essential for our prospects. A decentralized resolution by which the frequency converter is put in 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 enterprise and is right now the world’s main producer of metering pumps and course of diaphragm pumps in addition to complete metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into a world group in just a few many years. Since 2022, the company has been a half of the Atlas Copco Group, a globally main Swedish manufacturer of compressors, vacuum options, mills, pumps, power tools and meeting techniques. Together with the new proprietor, LEWA will further broaden the economic pumps business. As a analysis and manufacturing company, LEWA develops applied sciences and provides options for the huge array of applications amongst its prospects. Its merchandise are used mainly in the chemical business, the cosmetics industry, pharmaceuticals and biotechnology, meals and beverage business and vitality utilities as nicely as within the manufacturing of plastics, detergents and cleaners. เพรสเชอร์เกจคือ embrace refineries and petrochemicals, the oil and fuel business, and fuel odorization. LEWA at present employs around 1,200 people and owns 14 subsidiaries all over the world alongside having 80 representatives and sales places of work in additional 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 function a control range of 1:200, enabling a wider range 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 relentless torque, i.e. the entire torque may be called up at velocity zero rpm. This ensures significantly smooth and mild system start-up, since every course of could be began with a conveyance rate of 1 percent as a substitute of the standard 10 percent. (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 proven, the fixed torque of the PMSM permits continuous operation at low speeds. Oversizing for the required pump starting torque has turn into pointless as a outcome of high overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM may be managed via a normal frequency converter (NORD, Danfoss, and so forth.) with special parameterization, so that users can depend on common 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 options by which the frequency converter is put in immediately on the PMSM are also already possible 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 initial practical testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the decrease speed vary above all, the PMSM successfully demonstrated the advantages of constant torque: the ecodos take a look at pump could presumably be driven in a spread of 1:480 up to 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 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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