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

In many purposes, metering elements in the pharmaceutical or food business for example, pumps are required that not only may be precisely controlled by way of flow rate and dosing time, but also convey the elements significantly gently. To enable the confirmed pump models of the ecodos collection from LEWA GmbH to meet this demanding process with even more flexibility and vitality efficiency in the future, the producer is expanding the portfolio to incorporate a model new type of wide-range speed management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are additionally used now. They are characterized by excessive energy effectivity and a management vary larger than 1:200. This significantly expands the range of purposes. With PMSMs, it’s no longer necessary to make use of a quantity of pumps for various circulate rates or oversize asynchronous motors for low speeds. Since PMSMs may be designed without a fan, they remain compact and simple to scrub. The latter function predestines them for hygienic functions. High efficiency rating over the entire control range in accordance with power effectivity class IE5+ also reduces vitality costs, thus ensuring a lower total cost of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos sequence are particularly well fitted to purposes in the food or pharmaceutical industries. All materials in touch with the fluids used in the pump units meet the FDA and USP Class VI necessities, and the EU directives for the food industry. In the hygienic version, for example, the pump head is manufactured from PP or electropolished stainless-steel with a floor roughness < 0.5 µm. This facilitates cleansing of the surfaces in contact with the product.
เครื่องมือวัดความดันคือ used thus far have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the management range remains limited to 1:10 (1:50 is possible in particular person cases). With encoder feedback, vital expansion is possible,” said Maurice Wirkner, an application manager at LEWA. “In addition, the drive is relatively inefficient outside the rated pace vary – particularly at low speeds. pressure gauge หน้าปัด 4 นิ้ว requires the drive to be outsized, which increases working prices.” Servomotors are optimized for highly dynamic necessities and in addition cowl the entire control vary (1-210 pump strokes), nonetheless, they’re costlier to buy and in addition, require a servo inverter for management.
Wide-range speed control with everlasting magnet synchronous motor extends the range of functions
LEWA has now expanded its personal portfolio with a drive expertise that doesn’t 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 issues, it options an excessive management vary, which often makes the usage of multiple pumps for different circulate rates unnecessary.” Particularly in the case of a number of pumps, a further guide stroke adjustment or electrical stroke adjustment may be allotted with and the required move fee may be realized by velocity control solely. The PMSM additionally has a relentless torque. The complete torque may be utilized from engine speed 0 rpm (standstill) up to the rated velocity of the motor. This ensures significantly clean and delicate system start-up, since each process can be started with a pump capacity of 1 percent instead of the standard 10 %.
It additionally contains a high short-term overload capacity, which permits a drive design without oversizing for the beginning torque. As a end result, smaller, extra cost-efficient sizes can be realized than with traditional drives. “Like the asynchronous motor, the PMSM may be managed via a normal frequency converter, so customers can rely on common parts,” Wirkner explained. “With the servomotor on the contrary, it will be essential to buy costly servo controllers.” The compact drive may be simply cleaned as a outcome of its fanless design and provides high IP protection. If required an additional conversion process – known as nsd tupH – can be applied to the aluminum body for FDA requirements. This makes the floor extraordinarily resistant and even easier to scrub – best for applications with stringent hygienic requirements, such as aroma metering within the food business or additive dosing in the pharmaceutical industry.
IE5+ PMSM permits value discount and decentralized solutions
The sole limitation of the presently used PMSM is that it is just obtainable for protected areas. “Thanks to wide-range velocity management with IE5+ PMSM, we will meet the growing buyer demands for a wider adjustment range and decrease vitality consumption, in addition to total costs,” said Wirkner to sum up the scenario. “The subject of energy effectivity particularly is turning into increasingly important for our prospects. A decentralized resolution during which the frequency converter is installed directly on the PMSM, can now be carried out with Getriebebau NORD GmbH & Co. KG, LEWA’s motor associate for PMSM, too.”
LEWA GmbH was based in 1952 by Herbert Ott and Rudolf Schestag as a family business and is today the world’s main manufacturer of metering pumps and course of diaphragm pumps as nicely as full metering packages for process engineering. Headquartered in Leonberg, the company developed into an international group in just a few a long time. Since 2022, the company has been part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum options, mills, pumps, energy instruments and meeting systems. Together with the model new owner, LEWA will additional increase the industrial pumps enterprise. As a research and manufacturing company, LEWA develops applied sciences and offers options for the vast array of functions amongst its customers. Its products are used primarily within the chemical trade, the cosmetics trade, pharmaceuticals and biotechnology, meals and beverage industry and vitality utilities in addition to in the manufacturing of plastics, detergents and cleaners. Additional utility areas include refineries and petrochemicals, the oil and gasoline business, and fuel odorization. LEWA currently employs around 1,200 people and owns 14 subsidiaries all over the world alongside having eighty representatives and gross sales places of work in more than eighty countries.
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 purposes to be lined by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM additionally has a relentless torque, i.e. all the torque can be called up at speed 0 rpm. This ensures notably easy and mild system start-up, since every process can be started with a conveyance rate of 1 percent instead of the same old 10 %. (Example: Metering omega three fatty acids in the manufacturing of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the constant torque of the PMSM allows continuous operation at low speeds. Oversizing for the required pump beginning torque has become 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 could be controlled through a regular frequency converter (NORD, Danfoss, etc.) with special parameterization, in order that users can depend on widespread parts.
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 put in immediately on the PMSM are additionally already attainable 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 check bench. In the lower speed range above all, the PMSM successfully demonstrated the benefits of constant 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:
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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
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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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