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In many applications, metering elements in the pharmaceutical or food business for instance, pumps are required that not only could be exactly controlled when it comes to circulate price and dosing time, but additionally convey the ingredients significantly gently. To allow the confirmed pump units of the ecodos collection from LEWA GmbH to fulfill this demanding activity with much more flexibility and power efficiency sooner or later, the manufacturer is expanding the portfolio to incorporate a new type of wide-range pace management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by excessive power effectivity and a management range larger than 1:200. This significantly expands the range of functions. With PMSMs, it’s not necessary to use a quantity of pumps for different flow rates or oversize asynchronous motors for low speeds. Since PMSMs could be designed without a fan, they continue to be compact and straightforward to scrub. The latter feature predestines them for hygienic purposes. High efficiency score over the whole control range in accordance with energy effectivity class IE5+ also reduces energy costs, thus making certain a decrease whole price of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos series are notably well suited for purposes in the food or pharmaceutical industries. All materials in touch with the fluids used in the pump items meet the FDA and USP Class VI necessities, and the EU directives for the meals industry. 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 cleaning of the surfaces in touch with the product.
The motor technologies used to date have had to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the control vary remains limited to 1:10 (1:50 is possible in particular person cases). With encoder suggestions, significant growth is feasible,” said Maurice Wirkner, an application manager at LEWA. “In addition, the drive is comparatively inefficient exterior the rated pace range – particularly at low speeds. This requires the drive to be outsized, which will increase working prices.” Servomotors are optimized for extremely dynamic necessities and also cowl the whole control vary (1-210 pump strokes), nonetheless, they are costlier to buy and in addition, require a servo inverter for control.
Wide-range velocity control with everlasting magnet synchronous motor extends the vary of functions
LEWA has now expanded its own portfolio with a drive technology 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 features an excessive control vary, which often makes the use of a number of pumps for different move charges pointless.” Particularly within the case of a number of pumps, an extra manual stroke adjustment or electric stroke adjustment could be dispensed with and the required move rate could be realized by speed management solely. The PMSM additionally has a constant torque. The complete torque could be applied from engine pace zero rpm (standstill) as a lot as the rated speed of the motor. This ensures significantly smooth and delicate system start-up, since every process could be began with a pump capacity of 1 p.c instead of the similar old 10 %.
It additionally features a excessive short-term overload capacity, which allows a drive design with out oversizing for the beginning torque. As a end result, smaller, more cost-efficient sizes could be realized than with traditional drives. “Like the asynchronous motor, the PMSM can be managed by way of a standard frequency converter, so customers can rely on frequent components,” Wirkner explained. “With the servomotor on the contrary, it will be necessary to buy expensive servo controllers.” The compact drive could be easily cleaned due to its fanless design and offers high IP safety. If required a further conversion process – known as nsd tupH – may be utilized to the aluminum physique for FDA requirements. This makes the floor extraordinarily resistant and even easier to clean – ideal for functions with stringent hygienic requirements, similar to aroma metering within the meals trade or additive dosing within the pharmaceutical business.
IE5+ PMSM permits value reduction and decentralized solutions
The sole limitation of the at present used PMSM is that it’s only available for protected areas. “Thanks to wide-range velocity control with IE5+ PMSM, we can meet the increasing customer demands for a wider adjustment vary and decrease vitality consumption, in addition to overall prices,” stated Wirkner to sum up the state of affairs. “The matter of vitality efficiency in particular is turning into more and more essential for our prospects. A decentralized solution during 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 founded in 1952 by Herbert Ott and Rudolf Schestag as a family enterprise and is at present the world’s main manufacturer of metering pumps and course of diaphragm pumps as well as complete metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a world group in only a few a long time. Since 2022, the corporate has been a half of the Atlas Copco Group, a globally leading Swedish manufacturer of compressors, vacuum solutions, mills, pumps, energy instruments and meeting methods. Together with the model new proprietor, LEWA will further increase the industrial pumps enterprise. As a analysis and manufacturing firm, LEWA develops technologies and supplies solutions for the vast array of purposes among its clients. Its merchandise are used mainly within the chemical trade, the cosmetics trade, pharmaceuticals and biotechnology, meals and beverage trade and energy utilities in addition to in the production of plastics, detergents and cleaners. เกจวัดแรงดันดิจิตอลราคา and petrochemicals, the oil and fuel trade, and gas odorization. LEWA at present employs round 1,200 folks and owns 14 subsidiaries all over the world alongside having eighty representatives and sales places of work in more than eighty 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 function a management range of 1:200, enabling a wider range of applications to be coated by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a relentless torque, i.e. all the torque could be known as up at speed zero rpm. This ensures particularly smooth and gentle system start-up, since every course of can be began with a conveyance fee of 1 % as a substitute of the standard 10 percent. (Example: Metering omega 3 fatty acids within the manufacturing of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the fixed torque of the PMSM permits continuous operation at low speeds. Oversizing for the required pump beginning torque has turn into unnecessary as a end result of high 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 forth.) with special parameterization, in order that customers can depend on frequent 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 in which the frequency converter is installed directly on the PMSM are also already possible 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 test bench. In the lower velocity range above all, the PMSM efficiently demonstrated the advantages of fixed torque: the ecodos test pump could probably be pushed 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 information 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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