In many functions, metering components in the pharmaceutical or meals business for example, pumps are required that not only could be exactly managed when it comes to move fee and dosing time, but also convey the components particularly gently. To enable the confirmed pump models of the ecodos collection from LEWA GmbH to meet this demanding activity with much more flexibility and vitality efficiency sooner or later, the producer is expanding the portfolio to include a new type of wide-range velocity management. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for brief, are additionally used now. They are characterized by high power effectivity and a management vary larger than 1:200. This considerably expands the vary of purposes. With PMSMs, it’s not essential to use several pumps for different flow charges or oversize asynchronous motors for low speeds. Since PMSMs can be designed without a fan, they remain compact and straightforward to scrub. The latter function predestines them for hygienic applications. High effectivity rating over the complete management range in accordance with vitality efficiency class IE5+ also reduces power prices, thus ensuring a decrease whole price of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos sequence are significantly properly suited for purposes in the meals or pharmaceutical industries. All supplies involved 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 model, 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 involved with the product.
เกจวัดแรงดันไนโตรเจน used thus far have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the management vary remains limited to 1:10 (1:50 is feasible in individual cases). With encoder suggestions, important enlargement is possible,” stated Maurice Wirkner, an software manager at LEWA. “In addition, the drive is comparatively inefficient outdoors the rated pace range – especially at low speeds. This requires the drive to be outsized, which will increase working prices.” Servomotors are optimized for highly dynamic requirements and likewise cowl the complete control range (1-210 pump strokes), nevertheless, they are costlier to purchase and as well as, require a servo inverter for management.
Wide-range pace control with everlasting magnet synchronous motor extends the range 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 everlasting magnets and rotates synchronously, i.e. without load-dependent slip,” Wirkner defined. “Among other things, it features an extreme control range, which regularly makes the usage of a number of pumps for different move rates unnecessary.” Particularly within the case of a number of pumps, an extra manual stroke adjustment or electric stroke adjustment could be allotted with and the required move fee may be realized by velocity management solely. The PMSM also has a relentless torque. The complete torque could be utilized from engine speed zero rpm (standstill) as much as the rated pace of the motor. This ensures notably clean and delicate system start-up, since every process can be began with a pump capacity of 1 % as a substitute of the standard 10 %.
It also features a excessive short-term overload capacity, which allows a drive design without oversizing for the beginning torque. As a outcome, smaller, more cost-efficient sizes can be realized than with basic drives. “Like the asynchronous motor, the PMSM could be managed via a regular frequency converter, so users can rely on widespread parts,” Wirkner explained. “With the servomotor on the contrary, it might be essential to purchase costly servo controllers.” เกจ์วัดแก๊สหุงต้ม can be simply cleaned due to its fanless design and provides high IP safety. If required a further conversion process – called nsd tupH – may be applied to the aluminum body for FDA requirements. This makes the surface extraordinarily resistant and even easier to scrub – ideal for purposes with stringent hygienic necessities, similar to aroma metering in the food trade or additive dosing in the pharmaceutical industry.
IE5+ PMSM allows value discount and decentralized solutions
The sole limitation of the at present used PMSM is that it is just obtainable for protected areas. “Thanks to wide-range velocity control with IE5+ PMSM, we are in a position to meet the rising customer calls for for a wider adjustment range and decrease energy consumption, in addition to general costs,” said Wirkner to sum up the situation. “The matter of power effectivity in particular is turning into more and more necessary for our customers. A decentralized answer in which the frequency converter is put in instantly on the PMSM, can now be carried out 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 family enterprise and is right now the world’s leading manufacturer of metering pumps and course of diaphragm pumps in addition to full metering packages for course of engineering. Headquartered in Leonberg, the company developed into a world group in only a few many years. Since 2022, the corporate has been part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum solutions, mills, pumps, energy tools and assembly techniques. Together with the model new owner, LEWA will further broaden the industrial pumps business. As a research and manufacturing firm, LEWA develops technologies and provides solutions for the vast array of purposes amongst its clients. Its merchandise are used mainly within the chemical trade, the cosmetics industry, prescription drugs and biotechnology, meals and beverage industry and vitality utilities in addition to within the manufacturing of plastics, detergents and cleaners. Additional utility areas embody refineries and petrochemicals, the oil and gas trade, and gasoline odorization. LEWA presently employs round 1,200 individuals and owns 14 subsidiaries around the world alongside having 80 representatives and sales places of work in more than eighty 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 function a control vary of 1:200, enabling a wider range of functions to be lined 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 of the torque could be known as up at pace zero rpm. This ensures significantly clean and gentle system start-up, since each course of could be started with a conveyance fee of 1 % instead of the similar old 10 p.c. (Example: Metering omega three fatty acids in the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In contrast to the ASMs proven, the fixed torque of the PMSM allows continuous operation at low speeds. Oversizing for the required pump beginning torque has turn out to be pointless due to the high overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be managed by way of a standard frequency converter (NORD, Danfoss, etc.) with particular parameterization, in order that customers can rely on frequent 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 during 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 initial practical testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the lower velocity vary above all, the PMSM efficiently demonstrated the advantages of fixed torque: the ecodos take a look at pump could probably be driven in a spread of 1:480 as a lot as 5 bar.
Source: LEWA GmbH
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