In many purposes, metering elements in the pharmaceutical or food industry for example, pumps are required that not solely could be exactly managed in terms of circulate price and dosing time, but in addition convey the elements significantly gently. To enable the confirmed pump items of the ecodos collection from LEWA GmbH to satisfy this demanding task with even more flexibility and vitality effectivity sooner or later, the producer is expanding the portfolio to incorporate a new form of wide-range velocity management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by high vitality efficiency and a control vary larger than 1:200. This significantly expands the vary of applications. With PMSMs, it’s no longer necessary to use a number of pumps for different flow charges or oversize asynchronous motors for low speeds. Since PMSMs could be designed without a fan, they continue to be compact and easy to wash. The latter feature predestines them for hygienic applications. High effectivity score over the complete control range in accordance with vitality effectivity class IE5+ additionally reduces vitality costs, thus guaranteeing a decrease whole value of ownership (TCO).
The diaphragm metering pumps within the LEWA ecodos sequence are particularly nicely fitted to purposes within the meals or pharmaceutical industries. All supplies 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 version, for example, the pump head is made of PP or electropolished chrome 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 control range remains limited to 1:10 (1:50 is possible in particular person cases). With เครื่องมือที่ใช้วัดความดันเลือด , important expansion is feasible,” said Maurice Wirkner, an utility manager at LEWA. “In addition, the drive is relatively inefficient outside the rated velocity vary – especially at low speeds. This requires the drive to be oversized, which will increase operating costs.” Servomotors are optimized for extremely dynamic requirements and in addition cowl the entire control range (1-210 pump strokes), nonetheless, they are more expensive to buy and as well as, require a servo inverter for control.
Wide-range speed control with everlasting magnet synchronous motor extends the vary of applications
LEWA has now expanded its personal portfolio with a drive know-how that does not 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 explained. “Among different issues, it options an excessive management vary, which frequently makes the usage of multiple pumps for various flow charges pointless.” Particularly in the case of a quantity of pumps, a further guide stroke adjustment or electrical stroke adjustment can be allotted with and the required move rate may be realized by velocity management solely. The PMSM also has a relentless torque. The full torque could be utilized from engine speed 0 rpm (standstill) as much as the rated velocity of the motor. This ensures significantly easy and mild system start-up, since every course of can be started with a pump capacity of 1 p.c as a substitute of the similar old 10 p.c.
It additionally features a high short-term overload capability, which permits a drive design without oversizing for the beginning torque. As a end result, smaller, more cost-efficient sizes can be realized than with traditional drives. “Like the asynchronous motor, the PMSM could be controlled through a standard frequency converter, so customers can rely on frequent components,” Wirkner defined. “With the servomotor on the contrary, it would be needed to purchase expensive servo controllers.” The compact drive may be easily cleaned as a end result of its fanless design and presents excessive IP safety. If required an additional conversion process – known as nsd tupH – can be utilized to the aluminum physique for FDA necessities. This makes the surface extremely resistant and even easier to scrub – perfect for functions with stringent hygienic requirements, corresponding to aroma metering within the food industry or additive dosing within the pharmaceutical industry.
IE5+ PMSM enables price discount and decentralized solutions
The sole limitation of the at present used PMSM is that it is only obtainable for secure areas. “Thanks to wide-range pace control with IE5+ PMSM, we can meet the growing customer calls for for a wider adjustment vary and lower vitality consumption, as properly as total prices,” mentioned Wirkner to sum up the scenario. “The matter of power effectivity particularly is becoming increasingly essential for our clients. A decentralized resolution in which the frequency converter is put in instantly 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 household business and is right now the world’s main producer of metering pumps and process diaphragm pumps as nicely as complete metering packages for process engineering. Headquartered in Leonberg, the company developed into an international group in only a few decades. Since 2022, the company has been part of the Atlas Copco Group, a globally leading Swedish manufacturer of compressors, vacuum solutions, mills, pumps, power tools and assembly methods. Together with the new owner, LEWA will additional broaden the economic pumps business. As a analysis and manufacturing company, LEWA develops technologies and provides options for the vast array of purposes among its prospects. Its merchandise are used primarily in the chemical industry, the cosmetics trade, prescription drugs and biotechnology, food and beverage trade and energy utilities as properly as in the production of plastics, detergents and cleaners. Additional application areas embrace refineries and petrochemicals, the oil and gas industry, and gasoline odorization. LEWA at present employs round 1,200 people and owns 14 subsidiaries around the world alongside having eighty representatives and gross 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 characteristic a control range 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 also has a constant torque, i.e. the entire torque can be called up at velocity zero rpm. This ensures significantly easy and gentle system start-up, since every course of may be started with a conveyance rate of 1 p.c as a substitute of the usual 10 p.c. (Example: Metering omega three fatty acids within the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs proven, the constant torque of the PMSM permits steady operation at low speeds. Oversizing for the required pump starting torque has turn out to be unnecessary due to the excessive overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM could be managed by way of a normal frequency converter (NORD, Danfoss, and so on.) with particular parameterization, in order that users can rely 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 options by which the frequency converter is installed instantly on the PMSM are additionally already potential 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 useful testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the lower pace vary above all, the PMSM efficiently demonstrated the benefits of fixed torque: the ecodos test pump might be driven in a spread of 1:480 up to 5 bar.
Source: LEWA GmbH
More information for readers/viewers/interested parties:
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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