In ราคาเกจวัดแรงดันลม , metering elements in the pharmaceutical or meals business for example, pumps are required that not only can be exactly controlled when it comes to flow fee and dosing time, but in addition convey the components particularly gently. To allow the confirmed pump models of the ecodos sequence from LEWA GmbH to satisfy this demanding process with much more flexibility and energy effectivity sooner or later, the producer is expanding the portfolio to incorporate a new form of wide-range speed control. Alongside asynchronous motors and servomotors, permanent magnet synchronous motors, or PMSMs for brief, are also used now. They are characterised by excessive energy efficiency and a management range larger than 1:200. This considerably expands the range of applications. With PMSMs, it’s now not necessary to make use of a number of pumps for different circulate charges or oversize asynchronous motors for low speeds. Since PMSMs may be designed with no fan, they continue to be compact and simple to scrub. The latter function predestines them for hygienic functions. High efficiency rating over the entire control vary in accordance with power effectivity class IE5+ additionally reduces vitality prices, thus ensuring a lower whole value of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos collection are significantly nicely fitted to purposes in the food or pharmaceutical industries. All materials in touch with the fluids used in the pump models meet the FDA and USP Class VI requirements, and the EU directives for the meals business. In the hygienic version, 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 in touch with the product.
The motor technologies used to date have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the control vary stays limited to 1:10 (1:50 is possible in individual cases). With encoder feedback, significant enlargement is possible,” said Maurice Wirkner, an application supervisor at LEWA. “In addition, the drive is comparatively inefficient exterior the rated velocity vary – especially at low speeds. This requires the drive to be oversized, which increases working costs.” Servomotors are optimized for highly dynamic necessities and also cowl the entire control vary (1-210 pump strokes), nonetheless, they’re more expensive to purchase and in addition, require a servo inverter for management.
Wide-range speed 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 different issues, it options an extreme control range, which often makes the usage of a quantity of pumps for different circulate charges pointless.” Particularly in the case of multiple pumps, a further handbook stroke adjustment or electric stroke adjustment could be allotted with and the required move price may be realized by pace management only. The PMSM also has a constant torque. The full torque could be applied from engine pace zero rpm (standstill) up to the rated speed of the motor. This ensures particularly smooth and mild system start-up, since every process could be started with a pump capacity of 1 p.c as an alternative of the identical old 10 percent.
It additionally includes a excessive short-term overload capacity, which permits a drive design with out oversizing for the beginning torque. As a result, smaller, extra cost-efficient sizes may be realized than with classic drives. “Like the asynchronous motor, the PMSM could be managed via a regular frequency converter, so users can depend on common parts,” Wirkner defined. “With the servomotor on the contrary, it might be needed to buy costly servo controllers.” The compact drive could be simply cleaned due to its fanless design and offers excessive IP protection. If required an extra conversion process – called nsd tupH – could be applied to the aluminum body for FDA requirements. This makes the surface extraordinarily resistant and even simpler to wash – best for functions with stringent hygienic necessities, similar to aroma metering within the food industry or additive dosing within the pharmaceutical business.
IE5+ PMSM enables price discount and decentralized options
The sole limitation of the currently used PMSM is that it is only out there for secure areas. “Thanks to wide-range pace management with IE5+ PMSM, we will meet the rising buyer demands for a wider adjustment vary and decrease vitality consumption, in addition to overall costs,” said Wirkner to sum up the scenario. “The topic of energy efficiency particularly is changing into more and more necessary for our customers. A decentralized resolution by which the frequency converter is put in 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 at present 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 a world group in only a few decades. Since 2022, the company has been part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum options, mills, pumps, power tools and meeting techniques. Together with the brand new owner, LEWA will additional expand the industrial pumps enterprise. As a research and manufacturing company, LEWA develops technologies and provides solutions for the huge array of functions amongst its customers. Its merchandise are used primarily within the chemical industry, the cosmetics trade, pharmaceuticals and biotechnology, food and beverage industry and power utilities in addition to in the production of plastics, detergents and cleaners. Additional software areas embody refineries and petrochemicals, the oil and fuel business, and fuel odorization. LEWA currently employs round 1,200 folks and owns 14 subsidiaries all over the world alongside having eighty representatives and sales offices in more than eighty nations.
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 characteristic a control vary of 1:200, enabling a wider range of applications to be coated by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM additionally has a constant torque, i.e. the entire torque may be known as up at speed 0 rpm. This ensures notably easy and gentle system start-up, since each process could be began with a conveyance fee of 1 percent as an alternative of the identical old 10 %. (Example: Metering omega 3 fatty acids within the manufacturing of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs proven, the fixed torque of the PMSM permits steady operation at low speeds. Oversizing for the required pump beginning torque has turn out to be pointless due to the high overload capability of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM could be controlled through a regular frequency converter (NORD, Danfoss, etc.) with special parameterization, in order that users can rely on frequent 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 during which the frequency converter is put in immediately on the PMSM are also 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 functional testing with the NORD PMSM prototype and an ecodos pump on the pump take a look at bench. In the decrease pace vary above all, the PMSM efficiently demonstrated the benefits of constant torque: the ecodos test pump could possibly be pushed in a spread of 1:480 as much as 5 bar.
Source: LEWA GmbH
More information for readers/viewers/interested parties:
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 info 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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