In เครื่องมือที่ใช้วัดความดัน , metering ingredients in the pharmaceutical or meals business for example, pumps are required that not only can be precisely controlled when it comes to move rate and dosing time, but in addition convey the components particularly gently. To enable the confirmed pump models of the ecodos series from LEWA GmbH to meet this demanding activity with even more flexibility and energy efficiency sooner or later, the manufacturer is expanding the portfolio to incorporate a new type of wide-range pace management. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for short, are also used now. They are characterized by excessive power efficiency and a control vary greater than 1:200. This significantly expands the range of functions. With PMSMs, it is not needed to use several pumps for different move charges or oversize asynchronous motors for low speeds. Since PMSMs could be designed and not using a fan, they remain compact and easy to wash. The latter function predestines them for hygienic functions. High effectivity rating over the complete management vary in accordance with energy effectivity class IE5+ also reduces power costs, thus ensuring a lower complete value of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos series are notably well suited for purposes within the food or pharmaceutical industries. All materials in contact with the fluids used within the pump units meet the FDA and USP Class VI necessities, and the EU directives for the food industry. In the hygienic version, for instance, the pump head is manufactured from PP or electropolished chrome steel with a floor roughness < 0.5 µm. This facilitates cleaning of the surfaces in touch with the product.
The motor applied sciences used thus far have had to make sacrifices: “For traditional asynchronous motors whose rotor is a squirrel-cage rotor, the control range stays limited to 1:10 (1:50 is feasible in individual cases). With encoder suggestions, significant expansion is feasible,” mentioned Maurice Wirkner, an application supervisor at LEWA. “In addition, the drive is relatively inefficient outdoors the rated velocity range – particularly at low speeds. This requires the drive to be oversized, which increases working prices.” Servomotors are optimized for extremely dynamic requirements and also cowl the whole management vary (1-210 pump strokes), however, they’re dearer to buy and as properly as, require a servo inverter for control.
Wide-range pace control with permanent magnet synchronous motor extends the vary of functions
LEWA has now expanded its personal portfolio with a drive technology that does not have these weaknesses. “Unlike the asynchronous motor, the rotor of this drive consists of permanent magnets and rotates synchronously, i.e. with out load-dependent slip,” Wirkner defined. “Among other things, it features an extreme control vary, which frequently makes using a quantity of pumps for various circulate charges unnecessary.” Particularly within the case of multiple pumps, a further handbook stroke adjustment or electrical stroke adjustment can be dispensed with and the required flow rate may be realized by pace control solely. The PMSM also has a constant torque. The complete torque could be utilized from engine pace zero rpm (standstill) as much as the rated velocity of the motor. This ensures particularly easy and delicate system start-up, since every course of could be started with a pump capacity of 1 p.c as an alternative of the identical old 10 %.
It also contains a excessive short-term overload capability, which permits a drive design with out oversizing for the starting torque. As a end result, smaller, more cost-efficient sizes can be realized than with traditional drives. “Like the asynchronous motor, the PMSM may be managed via a regular frequency converter, so users can rely on frequent parts,” Wirkner defined. “With the servomotor on the contrary, it will be essential to purchase expensive servo controllers.” The compact drive may be simply cleaned because of its fanless design and presents high IP protection. If required an extra conversion process – known as nsd tupH – can be applied to the aluminum physique for FDA requirements. This makes the floor extraordinarily resistant and even easier to wash – best for applications with stringent hygienic requirements, corresponding to aroma metering within the food trade or additive dosing in the pharmaceutical industry.
IE5+ PMSM permits cost reduction and decentralized solutions
The sole limitation of the presently used PMSM is that it is only out there for protected areas. “Thanks to wide-range speed control with IE5+ PMSM, we are able to meet the increasing customer calls for for a wider adjustment range and decrease power consumption, in addition to overall prices,” mentioned Wirkner to sum up the scenario. “The topic of energy efficiency in particular is changing into more and more essential for our prospects. A decentralized answer during which the frequency converter is installed instantly 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 main manufacturer of metering pumps and course of diaphragm pumps in addition to complete metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into an international group in just a few a long time. Since 2022, the corporate has been part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum options, turbines, pumps, energy tools and assembly techniques. Together with the brand new proprietor, LEWA will further broaden the industrial pumps business. As a analysis and manufacturing company, LEWA develops technologies and supplies options for the huge array of purposes amongst its customers. Its merchandise are used primarily within the chemical industry, the cosmetics industry, prescription drugs and biotechnology, food and beverage industry and vitality utilities as well as in the manufacturing of plastics, detergents and cleaners. Additional utility areas include refineries and petrochemicals, the oil and fuel trade, and fuel odorization. LEWA presently employs round 1,200 individuals and owns 14 subsidiaries around the globe alongside having 80 representatives and 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 management vary of 1:200, enabling a wider vary of purposes to be coated by the same drive or pump.
เกจวัดแรงดันอากาศ : LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a relentless torque, i.e. all of the torque may be referred to as up at velocity zero rpm. This ensures significantly clean and delicate system start-up, since every process could be began with a conveyance rate of 1 percent as an alternative of the same 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 permits continuous operation at low speeds. Oversizing for the required pump beginning torque has turn into unnecessary due to the excessive overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be controlled by way of a normal frequency converter (NORD, Danfoss, and so on.) with particular parameterization, in order that customers can rely on common 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 solutions in which the frequency converter is installed instantly on the PMSM are additionally already potential with the PMSMs chosen by LEWA.
Source: Getriebebau NORD GmbH & Co. KG
Image ID: Functional testing.jpg
Caption: As early as 2020, LEWA carried out preliminary functional testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the decrease velocity range above all, the PMSM successfully demonstrated the advantages of fixed torque: the ecodos test pump might be driven in a range 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 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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