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

In many purposes, metering components within the pharmaceutical or meals industry for example, pumps are required that not solely may be exactly managed by means of circulate fee and dosing time, but in addition convey the ingredients notably gently. To enable the confirmed pump items of the ecodos sequence from LEWA GmbH to fulfill this demanding activity with even more flexibility and energy efficiency sooner or later, the manufacturer is expanding the portfolio to incorporate a new form of wide-range pace management. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for brief, are also used now. They are characterised by excessive power efficiency and a management range higher than 1:200. เกจวัดแรงอัดกระบอกสูบ expands the range of functions. With PMSMs, it’s no longer essential to make use of a quantity of pumps for different flow charges or oversize asynchronous motors for low speeds. Since PMSMs could be designed with no fan, they proceed to be compact and easy to wash. The latter feature predestines them for hygienic functions. High efficiency ranking over the complete control vary in accordance with vitality efficiency class IE5+ additionally reduces vitality costs, thus guaranteeing a lower complete cost of ownership (TCO).
The diaphragm metering pumps in the LEWA ecodos collection are notably well suited to purposes within the meals 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 model, for instance, the pump head is made of PP or electropolished stainless steel with a floor roughness < 0.5 µm. This facilitates cleaning of the surfaces in touch with the product.
The motor applied sciences used so far have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the control vary remains restricted to 1:10 (1:50 is possible in individual cases). With encoder suggestions, vital growth is feasible,” mentioned Maurice Wirkner, an application supervisor at LEWA. “In addition, the drive is comparatively inefficient outside the rated speed range – especially at low speeds. This requires the drive to be oversized, which will increase operating costs.” Servomotors are optimized for extremely dynamic necessities and likewise cover the whole management vary (1-210 pump strokes), nonetheless, they are dearer to purchase and as properly as, require a servo inverter for management.
Wide-range pace control with everlasting magnet synchronous motor extends the vary of purposes
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 permanent magnets and rotates synchronously, i.e. without load-dependent slip,” Wirkner explained. “Among other issues, it options an excessive control range, which regularly makes the use of a quantity of pumps for various move rates pointless.” Particularly within the case of multiple pumps, an additional guide stroke adjustment or electrical stroke adjustment could be distributed with and the required flow price can be realized by speed management only. The PMSM also has a relentless torque. The complete torque could be applied from engine velocity 0 rpm (standstill) as a lot as the rated speed of the motor. This ensures notably easy and gentle system start-up, since each process may be started with a pump capacity of 1 % as a substitute of the usual 10 %.
It also contains a excessive short-term overload capability, which allows a drive design without oversizing for the starting torque. As a outcome, smaller, more cost-efficient sizes can be realized than with basic drives. “Like the asynchronous motor, the PMSM can be controlled by way of a normal frequency converter, so users can rely on widespread elements,” Wirkner explained. “With the servomotor on the contrary, it will be necessary to buy expensive servo controllers.” The compact drive can be simply cleaned because of its fanless design and offers excessive IP safety. If required an extra conversion course of – known as nsd tupH – could be applied to the aluminum body for FDA necessities. This makes the floor extremely resistant and even simpler to scrub – best for applications with stringent hygienic requirements, such as aroma metering within the meals business or additive dosing in the pharmaceutical industry.
IE5+ PMSM enables cost discount and decentralized solutions
The sole limitation of the presently used PMSM is that it’s only available for safe areas. “Thanks to wide-range velocity management with IE5+ PMSM, we are able to meet the growing buyer calls for for a wider adjustment range and decrease power consumption, as properly as general prices,” stated Wirkner to sum up the state of affairs. “The matter of vitality effectivity in particular is changing into increasingly necessary for our clients. A decentralized solution 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 companion for PMSM, too.”
LEWA GmbH was based in 1952 by Herbert Ott and Rudolf Schestag as a family enterprise and is at present the world’s main producer of metering pumps and process diaphragm pumps in addition to full metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a global group in only a few decades. Since 2022, the corporate has been a half of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum solutions, turbines, pumps, energy instruments and assembly systems. Together with the model new owner, LEWA will further broaden the economic pumps enterprise. As a research and manufacturing company, LEWA develops applied sciences and provides options for the vast array of applications among its prospects. Its products are used mainly in the chemical trade, the cosmetics industry, pharmaceuticals and biotechnology, food and beverage trade and power utilities in addition to within the production of plastics, detergents and cleaners. Additional application areas include refineries and petrochemicals, the oil and fuel business, and gas odorization. LEWA currently employs around 1,200 people and owns 14 subsidiaries around the world alongside having 80 representatives and sales places of work in additional than 80 nations.
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 vary of 1:200, enabling a wider range of functions to be coated by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a continuing torque, i.e. all of the torque can be called up at pace zero rpm. This ensures notably clean and gentle system start-up, since every course of could be began with a conveyance rate of 1 % as a substitute of the identical old 10 %. (Example: Metering omega three fatty acids within the production of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs proven, the constant torque of the PMSM enables steady operation at low speeds. Oversizing for the required pump starting torque has turn into pointless as a result of excessive overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM could be managed through a standard frequency converter (NORD, Danfoss, and so on.) with particular 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 options in which the frequency converter is put in immediately on the PMSM are also 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 practical testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the lower pace range above all, the PMSM efficiently demonstrated the advantages of constant torque: the ecodos check pump might be pushed in a spread of 1:480 as much as 5 bar.
Source: LEWA GmbH
More info for readers/viewers/interested parties:
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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