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

In many purposes, metering ingredients within the pharmaceutical or food industry for example, pumps are required that not only may be precisely controlled in phrases of move fee and dosing time, but additionally convey the components particularly gently. To enable the confirmed pump units of the ecodos sequence from LEWA GmbH to fulfill this demanding activity with much more flexibility and energy effectivity sooner or later, the manufacturer is expanding the portfolio to include a new form of wide-range pace control. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for brief, are also used now. They are characterised by excessive vitality efficiency and a management vary higher than 1:200. This significantly expands the range of functions. With PMSMs, it is now not essential to use several pumps for various circulate charges or oversize asynchronous motors for low speeds. Since PMSMs can be designed with no fan, they continue to be compact and simple to wash. pressure gauge 0 10 bar ราคา for hygienic functions. High efficiency score over the entire control range in accordance with vitality efficiency class IE5+ additionally reduces vitality costs, thus ensuring a lower whole value of ownership (TCO).
The diaphragm metering pumps within the LEWA ecodos sequence are significantly well fitted to applications within the food or pharmaceutical industries. All supplies in contact with the fluids used in the pump units 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 from PP or electropolished chrome steel with a surface roughness < 0.5 µm. This facilitates cleansing of the surfaces involved with the product.
The motor technologies used thus far have needed to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the management vary stays limited to 1:10 (1:50 is feasible in individual cases). With encoder suggestions, vital enlargement is possible,” stated Maurice Wirkner, an application supervisor at LEWA. “In addition, the drive is relatively inefficient outside the rated velocity range – particularly at low speeds. This requires the drive to be outsized, which will increase operating costs.” Servomotors are optimized for highly dynamic necessities and likewise cover the whole management vary (1-210 pump strokes), however, they’re costlier to buy and as properly as, require a servo inverter for management.
Wide-range speed control with everlasting magnet synchronous motor extends the range of purposes
LEWA has now expanded its own portfolio with a drive technology 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 extreme management range, which regularly makes the utilization of a quantity of pumps for different circulate charges unnecessary.” Particularly in the case of multiple pumps, an extra guide stroke adjustment or electrical stroke adjustment could be distributed with and the required move fee may be realized by velocity control solely. The PMSM additionally has a constant torque. The full torque may be utilized from engine speed zero rpm (standstill) up to the rated velocity of the motor. This ensures notably easy and mild system start-up, since each process can be began with a pump capacity of 1 percent as an alternative of the similar old 10 p.c.
It additionally features a high short-term overload capacity, which permits a drive design with out oversizing for the starting torque. As a result, smaller, more cost-efficient sizes may be realized than with traditional drives. “Like the asynchronous motor, the PMSM could be controlled through a standard frequency converter, so users can depend on frequent components,” Wirkner defined. “With the servomotor on the contrary, it will be needed to purchase costly servo controllers.” The compact drive could be easily cleaned as a outcome of its fanless design and presents high IP safety. If required a further conversion course of – referred to as nsd tupH – may be utilized to the aluminum physique for FDA necessities. This makes the surface extremely resistant and even easier to wash – best for applications with stringent hygienic requirements, corresponding to aroma metering within the food business or additive dosing in the pharmaceutical business.
IE5+ PMSM allows value reduction and decentralized options
The sole limitation of the currently used PMSM is that it is only available for protected areas. “Thanks to wide-range speed control with IE5+ PMSM, we are in a position to meet the rising buyer demands for a wider adjustment range and decrease vitality consumption, as well as overall prices,” stated Wirkner to sum up the state of affairs. “The matter of energy efficiency specifically is becoming more and more necessary for our clients. A decentralized resolution by which the frequency converter is put in instantly on the PMSM, can now be implemented 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 at present the world’s leading producer of metering pumps and process diaphragm pumps in addition to complete metering packages for process engineering. Headquartered in Leonberg, the company developed into a global group in just some decades. Since 2022, the corporate has been part of the Atlas Copco Group, a globally main Swedish manufacturer of compressors, vacuum solutions, generators, pumps, power instruments and meeting methods. Together with the brand new owner, LEWA will additional broaden the commercial pumps enterprise. As a analysis and manufacturing company, LEWA develops technologies and supplies solutions for the huge array of purposes amongst its customers. Its products are used primarily within the chemical business, the cosmetics industry, prescription drugs and biotechnology, meals and beverage industry and power utilities as nicely as in the manufacturing of plastics, detergents and cleaners. Additional application areas embody refineries and petrochemicals, the oil and gasoline trade, and gas odorization. LEWA presently employs round 1,200 individuals and owns 14 subsidiaries around the globe alongside having 80 representatives and sales places of work in additional than eighty 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 characteristic a management vary of 1:200, enabling a wider vary of functions to be coated by the same 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 could be called up at speed 0 rpm. This ensures notably clean and gentle system start-up, since each process can be started with a conveyance rate of 1 percent as a substitute of the same old 10 percent. (Example: Metering omega three fatty acids within 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 permits steady operation at low speeds. Oversizing for the required pump starting torque has become pointless because of the high overload functionality of the PMSM.
เกจวัดแรงดันต่ำ : LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be managed by way of a regular frequency converter (NORD, Danfoss, and so on.) with particular parameterization, so 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 options by which the frequency converter is put in immediately on the PMSM are additionally 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 preliminary practical testing with the NORD PMSM prototype and an ecodos pump on the pump check bench. In the decrease speed vary above all, the PMSM successfully demonstrated the benefits of fixed torque: the ecodos take a look at pump could be driven in a variety of 1:480 as a lot 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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