In many purposes, metering ingredients within the pharmaceutical or meals trade for example, pumps are required that not only can be exactly controlled by way of flow fee and dosing time, but also convey the components particularly gently. To allow the confirmed pump units of the ecodos collection from LEWA GmbH to satisfy this demanding activity with even more flexibility and vitality efficiency sooner or later, the manufacturer is increasing the portfolio to incorporate a brand new form of wide-range pace control. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for short, are also used now. They are characterized by excessive vitality efficiency and a management vary larger than 1:200. This significantly expands the range of functions. With PMSMs, it’s no longer essential to use several pumps for different circulate charges or oversize asynchronous motors for low speeds. Since PMSMs can be designed with no fan, they continue to be compact and easy to clean. The latter function predestines them for hygienic purposes. High efficiency rating over the entire management range in accordance with vitality effectivity class IE5+ also reduces power prices, thus making certain a lower total value of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos sequence are significantly well fitted to purposes within the food or pharmaceutical industries. All supplies involved with the fluids used within the pump items meet the FDA and USP Class VI requirements, and the EU directives for the meals industry. In the hygienic model, for example, the pump head is made from PP or electropolished chrome steel with a floor roughness < 0.5 µm. This facilitates cleansing of the surfaces in contact with the product.
The motor technologies used thus far have had to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the control range remains limited to 1:10 (1:50 is feasible in individual cases). With เกจวัดแรงดัน , significant growth is feasible,” said Maurice Wirkner, an utility manager at LEWA. “In addition, the drive is comparatively inefficient exterior the rated speed range – especially at low speeds. This requires the drive to be outsized, which increases operating prices.” Servomotors are optimized for extremely dynamic necessities and also cowl the complete control range (1-210 pump strokes), nonetheless, they are dearer to buy and in addition, require a servo inverter for control.
Wide-range pace management with permanent magnet synchronous motor extends the vary of functions
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 extreme management range, which frequently makes the usage of a quantity of pumps for different move charges unnecessary.” Particularly within the case of multiple pumps, an additional handbook stroke adjustment or electrical stroke adjustment may be allotted with and the required flow price can be realized by velocity management solely. The PMSM also has a continuing torque. The full torque can be applied from engine speed 0 rpm (standstill) up to the rated pace of the motor. This ensures notably clean and mild system start-up, since every process may be started with a pump capability of 1 percent as a substitute of the standard 10 %.
It also contains a high short-term overload capability, which allows a drive design without oversizing for the starting torque. As a result, smaller, more cost-efficient sizes can be realized than with basic drives. “Like the asynchronous motor, the PMSM can be controlled through a regular frequency converter, so customers can rely on frequent elements,” Wirkner defined. “With the servomotor quite the opposite, it will be essential to purchase costly servo controllers.” The compact drive may be easily cleaned because of its fanless design and offers high IP protection. If required an additional conversion course of – called nsd tupH – can be utilized to the aluminum physique for FDA requirements. This makes the floor extremely resistant and even simpler to wash – perfect for purposes with stringent hygienic requirements, corresponding to aroma metering within the meals industry or additive dosing in the pharmaceutical industry.
IE5+ PMSM permits cost reduction and decentralized solutions
The sole limitation of the presently used PMSM is that it is only available for protected areas. “Thanks to wide-range velocity control with IE5+ PMSM, we can meet the growing buyer demands for a wider adjustment vary and lower energy consumption, in addition to total costs,” stated Wirkner to sum up the scenario. “The matter of energy effectivity particularly is changing into increasingly important for our clients. A decentralized resolution by which the frequency converter is installed instantly on the PMSM, can now be implemented 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 leading producer of metering pumps and course of diaphragm pumps in addition to complete metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a global group in just a few a long time. Since 2022, the company has been a half of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum solutions, turbines, pumps, power instruments and meeting techniques. Together with the new proprietor, LEWA will additional expand the commercial pumps business. As a research and manufacturing company, LEWA develops technologies and provides solutions for the vast array of purposes amongst its customers. Its products are used mainly within the chemical industry, the cosmetics industry, prescribed drugs and biotechnology, meals and beverage industry and vitality utilities in addition to in the production of plastics, detergents and cleaners. Additional application areas embody refineries and petrochemicals, the oil and gas trade, and gas odorization. LEWA at present employs round 1,200 folks and owns 14 subsidiaries around the globe alongside having eighty representatives and sales places of work in additional than 80 international locations.
Image material:
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 management vary of 1:200, enabling a wider vary of applications to be lined by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM also has a continuing torque, i.e. all the torque could be known as up at pace 0 rpm. This ensures notably clean and delicate system start-up, since every course of could be started with a conveyance price of 1 percent instead of the standard 10 p.c. (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 continuous operation at low speeds. Oversizing for the required pump beginning torque has turn into pointless because of the excessive overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM may be controlled through a normal frequency converter (NORD, Danfoss, and so on.) with particular parameterization, in order that customers 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 solutions by which the frequency converter is put in directly 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 take a look at bench. In the lower speed vary above all, the PMSM successfully demonstrated the advantages of fixed torque: the ecodos check pump could be driven in a spread of 1:480 as much as 5 bar.
Source: LEWA GmbH
More data 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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