In many applications, metering components in the pharmaceutical or meals trade for example, pumps are required that not only can be precisely managed by way of circulate rate and dosing time, but additionally convey the components particularly gently. To enable the proven pump items of the ecodos series from LEWA GmbH to meet this demanding process with even more flexibility and energy efficiency in the future, the manufacturer is expanding the portfolio to incorporate a new form of wide-range pace management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are also used now. They are characterised by excessive energy effectivity and a management vary higher than 1:200. This significantly expands the vary of applications. With PMSMs, it is now not necessary to use several pumps for different move rates or oversize asynchronous motors for low speeds. Since PMSMs could be designed and not utilizing a fan, they remain compact and straightforward to clean. The latter function predestines them for hygienic purposes. High efficiency ranking over the entire control range in accordance with energy efficiency class IE5+ also reduces vitality prices, thus ensuring a lower whole cost of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos collection are particularly well suited for functions within the food or pharmaceutical industries. All materials in touch with the fluids used within the pump items meet the FDA and USP Class VI requirements, and the EU directives for the meals industry. In the hygienic version, for example, the pump head is made of PP or electropolished stainless-steel with a surface roughness < zero.5 µm. This facilitates cleansing of the surfaces involved with the product.
The motor applied sciences used to date have had to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the control vary remains limited to 1:10 (1:50 is possible in individual cases). With encoder feedback, vital growth is feasible,” mentioned Maurice Wirkner, an software manager at LEWA. “In addition, the drive is relatively inefficient outdoors the rated velocity vary – especially at low speeds. This requires the drive to be oversized, which will increase working costs.” Servomotors are optimized for highly dynamic necessities and in addition cowl the entire control range (1-210 pump strokes), nonetheless, they’re dearer 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 own 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. without load-dependent slip,” Wirkner defined. “Among เครื่องมือความดัน , it options an excessive management vary, which often makes the use of multiple pumps for various circulate rates pointless.” Particularly in the case of multiple pumps, an additional manual stroke adjustment or electric stroke adjustment may be dispensed with and the required circulate price can be realized by velocity control only. The PMSM also has a constant torque. The full torque can be utilized from engine speed zero rpm (standstill) up to the rated velocity of the motor. This ensures notably clean and delicate system start-up, since every course of may be started with a pump capacity of 1 p.c instead of the usual 10 p.c.
It also includes a high short-term overload capacity, which permits a drive design without oversizing for the beginning torque. As a end result, smaller, more cost-efficient sizes could be realized than with classic drives. “Like the asynchronous motor, the PMSM may be managed via a regular frequency converter, so customers can rely on widespread parts,” Wirkner defined. “With the servomotor quite the opposite, it might be necessary to purchase expensive servo controllers.” The compact drive could be simply cleaned because of its fanless design and offers excessive IP protection. If required an extra conversion course of – known as nsd tupH – could be applied to the aluminum physique for FDA necessities. This makes the surface extremely resistant and even simpler to wash – best for functions with stringent hygienic necessities, similar to aroma metering within the food trade or additive dosing in the pharmaceutical trade.
IE5+ PMSM enables cost discount and decentralized options
The sole limitation of the presently used PMSM is that it’s only out there for secure areas. pressure gauge หน้าปัด 2 นิ้ว to wide-range velocity control with IE5+ PMSM, we can meet the rising customer demands for a wider adjustment range and lower vitality consumption, in addition to general costs,” mentioned Wirkner to sum up the scenario. “The topic of energy efficiency in particular is becoming increasingly necessary for our clients. A decentralized resolution in which the frequency converter is put in instantly on the PMSM, can now be implemented 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 leading manufacturer of metering pumps and process diaphragm pumps as properly as full metering packages for process engineering. Headquartered in Leonberg, the corporate developed into an international group in just some decades. Since 2022, the company has been a part of the Atlas Copco Group, a globally main Swedish manufacturer of compressors, vacuum options, turbines, pumps, power tools and meeting methods. Together with the new proprietor, LEWA will additional increase the commercial pumps enterprise. As a analysis and manufacturing company, LEWA develops technologies and supplies options for the huge array of functions amongst its clients. Its merchandise are used mainly within the chemical industry, the cosmetics trade, pharmaceuticals and biotechnology, meals and beverage industry and vitality utilities as nicely as within the manufacturing of plastics, detergents and cleaners. Additional application areas embrace refineries and petrochemicals, the oil and gas industry, and fuel odorization. LEWA currently employs round 1,200 individuals and owns 14 subsidiaries all over the world alongside having 80 representatives and gross sales offices in additional than 80 nations.
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 characteristic a control vary of 1:200, enabling a wider vary of functions to be lined 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 may be referred to as up at speed zero rpm. This ensures particularly easy and delicate system start-up, since every process may be began with a conveyance fee of 1 percent instead of the same old 10 %. (Example: Metering omega 3 fatty acids within the manufacturing of child 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 starting torque has turn into unnecessary due to the 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 normal frequency converter (NORD, Danfoss, and so on.) with special parameterization, in order that customers can rely on common 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 during which the frequency converter is put in directly on the PMSM are also already possible 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 useful testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the decrease pace range above all, the PMSM efficiently demonstrated the advantages of constant torque: the ecodos check pump could possibly be pushed in a range of 1:480 as much as 5 bar.
Source: LEWA GmbH
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