In many purposes, metering components in the pharmaceutical or meals trade for example, pumps are required that not only can be precisely controlled in terms of move rate and dosing time, but also convey the ingredients notably gently. To enable the proven pump models of the ecodos collection from LEWA GmbH to fulfill this demanding task with much more flexibility and power efficiency sooner or later, the manufacturer is expanding the portfolio to incorporate a new type of wide-range speed control. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for short, are also used now. They are characterized by high energy efficiency and a management vary greater than 1:200. This significantly expands the vary of functions. With PMSMs, it’s not necessary to make use of several pumps for various circulate rates or oversize asynchronous motors for low speeds. Since PMSMs may be designed without a fan, they remain compact and easy to wash. The latter characteristic predestines them for hygienic purposes. High efficiency score over the whole control vary in accordance with vitality efficiency class IE5+ additionally reduces power prices, thus making certain a decrease whole cost of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos sequence are particularly nicely suited to functions within the meals or pharmaceutical industries. All supplies in contact with the fluids used within the pump units meet the FDA and USP Class VI necessities, and the EU directives for the meals industry. In the hygienic version, for instance, the pump head is made from PP or electropolished stainless-steel with a floor roughness < zero.5 µm. This facilitates cleaning of the surfaces in touch with the product.
The motor technologies used so far have had to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the management vary stays limited to 1:10 (1:50 is feasible in particular person cases). With encoder suggestions, significant expansion is possible,” stated Maurice Wirkner, an software manager at LEWA. “In addition, the drive is relatively inefficient exterior the rated velocity range – especially at low speeds. This requires the drive to be outsized, which will increase operating costs.” Servomotors are optimized for highly dynamic requirements and in addition cowl the whole control range (1-210 pump strokes), however, they’re more expensive to buy and in addition, require a servo inverter for control.
Wide-range pace control with everlasting magnet synchronous motor extends the vary of functions
LEWA has now expanded its own portfolio with a drive know-how 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 options an extreme management vary, which frequently makes the use of multiple pumps for different flow rates unnecessary.” Particularly in the case of a number of pumps, an additional handbook stroke adjustment or electric stroke adjustment may be distributed with and the required flow price can be realized by pace control only. The PMSM additionally has a relentless torque. The complete torque can be applied from engine speed zero rpm (standstill) up to the rated pace of the motor. This ensures particularly clean and gentle system start-up, since every process could be started with a pump capacity of 1 p.c as a substitute of the identical old 10 p.c.
It also contains a excessive short-term overload capability, which enables a drive design with out oversizing for the starting torque. As a result, smaller, more cost-efficient sizes can be realized than with classic drives. “Like the asynchronous motor, the PMSM can be controlled by way of a normal frequency converter, so users can depend on frequent components,” Wirkner defined. “With the servomotor quite the opposite, it will be necessary to buy costly servo controllers.” The compact drive may be simply cleaned as a outcome of its fanless design and provides excessive IP protection. If required an extra conversion process – referred to as nsd tupH – may be applied to the aluminum body for FDA requirements. This makes the floor extremely resistant and even simpler to wash – ideal for purposes with stringent hygienic necessities, corresponding to aroma metering in the meals business or additive dosing in the pharmaceutical industry.
IE5+ PMSM allows value discount and decentralized options
The sole limitation of the presently used PMSM is that it’s only obtainable for safe areas. “Thanks to wide-range speed management with IE5+ PMSM, we will meet the rising buyer calls for for a wider adjustment range and decrease energy consumption, in addition to general prices,” said Wirkner to sum up the state of affairs. “The matter of energy efficiency particularly is becoming increasingly necessary for our customers. A decentralized solution during which the frequency converter is installed directly 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 right now the world’s leading producer of metering pumps and course of diaphragm pumps as properly as full metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into an international group in just some 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 assembly methods. Together with the model new proprietor, LEWA will additional broaden the commercial pumps business. As a analysis and manufacturing company, LEWA develops applied sciences and provides solutions for the huge array of purposes among its customers. Its products are used mainly within the chemical business, the cosmetics industry, prescription drugs and biotechnology, food and beverage industry and power utilities as nicely as within the production of plastics, detergents and cleaners. Additional utility areas include refineries and petrochemicals, the oil and gasoline industry, and gasoline odorization. LEWA at present employs round 1,200 people and owns 14 subsidiaries all over the world alongside having 80 representatives and gross sales offices 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 vary of functions 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 may be known as up at velocity zero rpm. This ensures significantly easy and gentle system start-up, since every process could be began with a conveyance rate of 1 % as a substitute of the usual 10 %. (Example: Metering omega three fatty acids within the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs shown, the fixed torque of the PMSM allows steady operation at low speeds. Oversizing for the required pump starting torque has turn out to be pointless due to the high overload capability of the PMSM.
pressure gauge น้ำมัน : LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM could be controlled through a regular frequency converter (NORD, Danfoss, and so forth.) with special parameterization, in order that customers can depend on widespread 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 put in immediately 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 initial practical testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the decrease speed vary above all, the PMSM efficiently demonstrated some great advantages of fixed torque: the ecodos check pump could be driven in a spread of 1:480 up to 5 bar.
Source: LEWA GmbH
More info 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 data 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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