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

In many applications, metering elements within the pharmaceutical or food business for instance, pumps are required that not solely could be exactly managed when it comes to move rate and dosing time, but in addition convey the components particularly gently. To allow the proven pump models of the ecodos collection from LEWA GmbH to meet this demanding activity with even more flexibility and vitality effectivity in the future, the producer is increasing the portfolio to incorporate a brand new form of wide-range pace management. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for short, are additionally used now. เกจวัดแรงกด are characterized by excessive vitality efficiency and a control vary greater than 1:200. This considerably expands the vary of functions. With PMSMs, it is no longer needed to make use of several pumps for different flow charges or oversize asynchronous motors for low speeds. Since PMSMs can be designed with no fan, they proceed to be compact and simple to scrub. The latter feature predestines them for hygienic applications. High effectivity ranking over the complete control vary in accordance with power efficiency class IE5+ additionally reduces vitality prices, thus guaranteeing a lower whole value of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos collection are notably well suited to functions within the meals or pharmaceutical industries. All materials in contact with the fluids used within the pump items meet the FDA and USP Class VI necessities, and the EU directives for the meals business. In the hygienic model, for instance, 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.
เครื่องมือวัดความดัน used so far have needed to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the control range stays restricted to 1:10 (1:50 is feasible in particular person cases). With encoder suggestions, vital expansion is feasible,” said Maurice Wirkner, an software supervisor at LEWA. “In addition, the drive is relatively inefficient outdoors the rated speed range – particularly at low speeds. This requires the drive to be oversized, which will increase operating costs.” Servomotors are optimized for extremely dynamic requirements and also cowl the whole control range (1-210 pump strokes), nevertheless, they are dearer to buy and as properly as, require a servo inverter for control.
Wide-range speed management with everlasting magnet synchronous motor extends the range of applications
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 everlasting magnets and rotates synchronously, i.e. with out load-dependent slip,” Wirkner explained. “Among other issues, it features an excessive control vary, which regularly makes the utilization of a number of pumps for various flow rates unnecessary.” Particularly in the case of multiple pumps, an extra manual stroke adjustment or electrical stroke adjustment could be distributed with and the required move price could be realized by velocity control solely. The PMSM additionally has a continuing torque. The complete torque could be utilized from engine speed 0 rpm (standstill) up to the rated speed of the motor. This ensures particularly smooth and mild system start-up, since each process may be started with a pump capacity of 1 % as a substitute of the standard 10 %.
It additionally contains a excessive short-term overload capacity, which permits a drive design without oversizing for the beginning torque. As a end result, smaller, extra cost-efficient sizes could be realized than with basic drives. “Like the asynchronous motor, the PMSM may be controlled by way of a standard frequency converter, so customers can rely on common elements,” Wirkner defined. “With the servomotor quite the opposite, it will be essential to purchase costly servo controllers.” The compact drive could be simply cleaned as a end result of its fanless design and offers excessive IP protection. If required a further conversion process – known as nsd tupH – can 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, corresponding to aroma metering within the food business or additive dosing within the pharmaceutical industry.
IE5+ PMSM enables price discount and decentralized solutions
The sole limitation of the currently used PMSM is that it is just available for safe areas. “Thanks to wide-range velocity management with IE5+ PMSM, we are ready to meet the increasing customer demands for a wider adjustment vary and decrease power consumption, in addition to total costs,” stated Wirkner to sum up the situation. “The matter of power efficiency particularly is changing into more and more necessary for our prospects. A decentralized answer by which the frequency converter is installed immediately 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 household business and is right now the world’s leading manufacturer of metering pumps and course of diaphragm pumps as nicely as full metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into an international group in only a few many years. Since 2022, the company has been a part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum solutions, mills, pumps, power tools and meeting techniques. Together with the model new owner, LEWA will additional expand the economic pumps business. As a analysis and manufacturing company, LEWA develops technologies and offers options for the vast array of applications amongst its customers. Its merchandise are used primarily in the chemical industry, the cosmetics trade, prescription drugs and biotechnology, food and beverage business and energy utilities in addition to in the production of plastics, detergents and cleaners. Additional software areas include refineries and petrochemicals, the oil and fuel industry, and gasoline odorization. LEWA at present employs round 1,200 individuals and owns 14 subsidiaries all over the world alongside having 80 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 feature a control range of 1:200, enabling a wider range of applications to be lined by the identical drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a continuing torque, i.e. all the torque may be known as up at speed 0 rpm. This ensures particularly clean and delicate system start-up, since each course of could be started with a conveyance fee of 1 p.c as an alternative of the usual 10 percent. (Example: Metering omega three fatty acids within the production of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the fixed torque of the PMSM enables steady operation at low speeds. Oversizing for the required pump beginning torque has become 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 by way of a standard frequency converter (NORD, Danfoss, etc.) with particular parameterization, so that customers can depend on frequent components.
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 installed instantly on the PMSM are also 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 check bench. In the decrease pace vary above all, the PMSM successfully demonstrated some nice benefits of constant torque: the ecodos take a look at pump could probably be pushed in a spread of 1:480 as a lot as 5 bar.
Source: LEWA GmbH
More info for readers/viewers/interested parties:
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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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