In many purposes, metering ingredients in the pharmaceutical or food business for instance, pumps are required that not only can be exactly controlled by method of move fee and dosing time, but additionally convey the components particularly gently. To enable the proven pump items of the ecodos sequence from LEWA GmbH to fulfill this demanding process with even more flexibility and power efficiency sooner or later, the manufacturer is increasing the portfolio to include a brand new type of wide-range pace control. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for brief, are also used now. They are characterized by high power effectivity and a control range greater than 1:200. This significantly expands the vary of functions. With PMSMs, it is now not needed to use several pumps for various move rates or oversize asynchronous motors for low speeds. Since PMSMs can be designed without a fan, they remain compact and simple to clean. The latter function predestines them for hygienic purposes. High efficiency ranking over the complete control range in accordance with power effectivity class IE5+ also reduces power prices, thus ensuring a decrease total cost of ownership (TCO).
pressure gauge ลม metering pumps within the LEWA ecodos series are particularly nicely fitted to purposes within the meals or pharmaceutical industries. All materials in touch with the fluids used within the pump units meet the FDA and USP Class VI requirements, and the EU directives for the meals business. In the hygienic model, for instance, the pump head is manufactured from PP or electropolished stainless-steel with a floor roughness < zero.5 µm. This facilitates cleansing of the surfaces in touch with the product.
The motor technologies used so far have had to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the management range stays restricted to 1:10 (1:50 is feasible in individual cases). With encoder feedback, vital enlargement is feasible,” said Maurice Wirkner, an application supervisor at LEWA. “In addition, the drive is relatively inefficient exterior the rated pace range – particularly at low speeds. This requires the drive to be outsized, which will increase operating costs.” Servomotors are optimized for highly dynamic requirements and in addition cover the whole control vary (1-210 pump strokes), nevertheless, they are more expensive to buy and in addition, require a servo inverter for management.
Wide-range pace control with everlasting magnet synchronous motor extends the range of functions
LEWA has now expanded its personal 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 different issues, it options an extreme management vary, which often makes using multiple pumps for different circulate charges unnecessary.” Particularly in the case of a number of pumps, an additional handbook stroke adjustment or electric stroke adjustment may be dispensed with and the required flow fee may be realized by velocity management solely. The PMSM also has a relentless torque. The complete torque may be utilized from engine pace zero rpm (standstill) up to the rated velocity of the motor. This ensures notably smooth and gentle system start-up, since each process can be started with a pump capability of 1 % as an alternative of the similar old 10 percent.
It also includes a excessive short-term overload capacity, which allows a drive design without oversizing for the starting torque. As a result, smaller, more cost-efficient sizes could be realized than with traditional drives. “Like the asynchronous motor, the PMSM may be managed through a standard frequency converter, so users can rely on widespread parts,” Wirkner defined. “With the servomotor on the contrary, it might be needed to buy expensive servo controllers.” The compact drive could be easily cleaned because of its fanless design and offers excessive IP protection. If required an additional conversion course of – known as nsd tupH – can be applied to the aluminum body for FDA requirements. This makes the floor extraordinarily resistant and even easier to wash – best for applications with stringent hygienic necessities, similar to aroma metering in the meals trade or additive dosing in the pharmaceutical trade.
IE5+ PMSM permits price discount and decentralized options
The sole limitation of the at present used PMSM is that it is just out there for safe areas. “Thanks to wide-range speed management with IE5+ PMSM, we are in a position to meet the increasing buyer demands for a wider adjustment range and decrease vitality consumption, in addition to overall prices,” said Wirkner to sum up the scenario. “The topic of energy efficiency specifically is turning into more and more necessary for our clients. A decentralized answer in which the frequency converter is installed directly on the PMSM, can now be carried out 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 household business and is today the world’s main producer of metering pumps and course of diaphragm pumps as well as complete metering packages for process engineering. Headquartered in Leonberg, the company developed into a world group in just a few a long time. Since 2022, the company has been a part of the Atlas Copco Group, a globally leading Swedish manufacturer of compressors, vacuum options, generators, pumps, energy instruments and assembly methods. Together with the model new proprietor, LEWA will further broaden the industrial pumps enterprise. As a research and manufacturing company, LEWA develops technologies and offers solutions for the huge array of functions amongst its customers. Its products are used primarily in the chemical business, the cosmetics business, prescription drugs and biotechnology, meals and beverage industry and vitality utilities in addition to within the production of plastics, detergents and cleaners. Additional software areas embody refineries and petrochemicals, the oil and gasoline business, and fuel odorization. LEWA presently employs around 1,200 people and owns 14 subsidiaries all over the world alongside having eighty representatives and gross sales workplaces in more than 80 nations.
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 vary of functions to be lined by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a continuing torque, i.e. all the torque can be known as up at pace zero rpm. This ensures notably clean and gentle system start-up, since each process could be began with a conveyance rate of 1 percent as a substitute of the same old 10 p.c. (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 allows continuous operation at low speeds. Oversizing for the required pump beginning torque has become pointless due to the high overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be managed via a regular frequency converter (NORD, Danfoss, and so on.) with special parameterization, so that users can depend on common 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 during which the frequency converter is installed directly 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 preliminary functional testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the decrease pace range above all, the PMSM efficiently demonstrated the advantages of fixed torque: the ecodos take a look at pump could possibly be driven in a variety of 1:480 as much as 5 bar.
Source: LEWA GmbH
More information for readers/viewers/interested events:
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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