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

In many applications, metering elements within the pharmaceutical or meals industry for example, pumps are required that not only may be exactly managed in terms of circulate rate and dosing time, but in addition convey the elements particularly gently. To allow the proven pump models of the ecodos sequence from LEWA GmbH to fulfill this demanding activity with much more flexibility and power effectivity in the future, the producer is expanding the portfolio to incorporate a new form of wide-range velocity control. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterised by excessive energy efficiency and a management range larger than 1:200. This significantly expands the vary of functions. With PMSMs, it is no longer needed to make use of a number of pumps for various circulate charges or oversize asynchronous motors for low speeds. Since PMSMs could be designed without a fan, they continue to be compact and straightforward to clean. The latter feature predestines them for hygienic purposes. High effectivity ranking over the complete management vary in accordance with vitality effectivity class IE5+ also reduces energy prices, thus making certain a lower complete cost of ownership (TCO).
The diaphragm metering pumps within the LEWA ecodos series are notably properly suited for applications within the meals or pharmaceutical industries. All materials in touch with the fluids used in the pump units meet the FDA and USP Class VI necessities, and the EU directives for the meals trade. In the hygienic model, for example, the pump head is made of PP or electropolished chrome steel with a surface roughness < 0.5 µm. This facilitates cleaning of the surfaces involved with the product.
เกจวัดแรงดัน4นิ้วราคา used so far have needed to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the control vary stays limited to 1:10 (1:50 is possible in individual cases). With encoder suggestions, important enlargement is feasible,” stated Maurice Wirkner, an utility manager at LEWA. “In addition, the drive is relatively inefficient outside the rated velocity range – especially at low speeds. This requires the drive to be oversized, which will increase working prices.” Servomotors are optimized for extremely dynamic necessities and also cowl the whole management vary (1-210 pump strokes), however, they’re costlier to buy and as well as, require a servo inverter for control.
Wide-range pace control with everlasting magnet synchronous motor extends the range of applications
LEWA has now expanded its personal portfolio with a drive expertise 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 things, it options an extreme management vary, which frequently makes the use of multiple pumps for different move rates pointless.” Particularly in the case of a number of pumps, an extra handbook stroke adjustment or electric stroke adjustment can be dispensed with and the required circulate price may be realized by pace control only. The PMSM also has a constant torque. The complete torque could be utilized from engine velocity 0 rpm (standstill) as much as the rated speed of the motor. This ensures particularly clean and delicate system start-up, since every course of can be started with a pump capacity of 1 p.c as an alternative of the usual 10 p.c.
It additionally contains a high short-term overload capacity, which permits a drive design with out oversizing for the beginning torque. As a result, smaller, extra cost-efficient sizes may be realized than with basic drives. “Like the asynchronous motor, the PMSM may be controlled via a normal frequency converter, so customers can rely on widespread components,” Wirkner defined. “With the servomotor quite the opposite, it would be essential to buy costly servo controllers.” The compact drive can be simply cleaned due to its fanless design and offers high IP protection. If required an extra conversion course of – called nsd tupH – may be applied to the aluminum body for FDA necessities. เกจวัดแรงดันpressuregauge makes the floor extraordinarily resistant and even simpler to scrub – ideal for functions with stringent hygienic necessities, similar to aroma metering within the food trade or additive dosing within the pharmaceutical industry.
IE5+ PMSM enables price reduction and decentralized solutions
The sole limitation of the presently used PMSM is that it’s only obtainable for secure areas. “Thanks to wide-range pace control with IE5+ PMSM, we are ready to meet the rising buyer demands for a wider adjustment range and lower vitality consumption, in addition to general costs,” mentioned Wirkner to sum up the scenario. “The matter of vitality efficiency specifically is becoming more and more essential for our clients. A decentralized answer by which the frequency converter is put in immediately on the PMSM, can now be applied 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 family business and is right now the world’s leading producer of metering pumps and course of diaphragm pumps as properly as complete metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into a global group in only a few a long time. Since 2022, the corporate has been a part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum options, generators, pumps, power instruments and meeting methods. Together with the new owner, LEWA will further expand the industrial pumps business. As a research and manufacturing firm, LEWA develops applied sciences and provides solutions for the huge array of purposes among its clients. Its products are used primarily in the chemical trade, the cosmetics industry, pharmaceuticals and biotechnology, food and beverage industry and power utilities as properly as in the manufacturing of plastics, detergents and cleaners. Additional utility areas embody refineries and petrochemicals, the oil and gas business, and fuel odorization. LEWA currently employs round 1,200 individuals and owns 14 subsidiaries around the world alongside having 80 representatives and sales places of work in more than 80 international locations.
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 control range of 1:200, enabling a wider vary of functions to be coated by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM additionally has a continuing torque, i.e. all of the torque may be referred to as up at pace 0 rpm. This ensures notably clean and delicate system start-up, since each process may be began with a conveyance fee of 1 % as a substitute of the standard 10 p.c. (Example: Metering omega three fatty acids in the production of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the fixed torque of the PMSM allows 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 controlled through a normal frequency converter (NORD, Danfoss, and so on.) with special parameterization, in order that users can rely 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 solutions by which the frequency converter is installed instantly 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 initial functional testing with the NORD PMSM prototype and an ecodos pump on the pump check bench. In the decrease speed vary above all, the PMSM efficiently demonstrated some nice benefits of constant torque: the ecodos check pump might be driven in a range of 1:480 as much as 5 bar.
Source: LEWA GmbH
More data for readers/viewers/interested parties:
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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