BOURDONGUAGE LOGO.png
บทความ

เกี่ยวกับเกจวัดแรงดัน

Wide-range Speed Control for Diaphragm Metering Pumps: LEWA ecodos collection with new motor

In many applications, metering elements in the pharmaceutical or food trade for example, pumps are required that not solely could be exactly controlled in terms of flow price and dosing time, but in addition convey the ingredients particularly gently. To allow the confirmed pump items of the ecodos collection from LEWA GmbH to meet this demanding activity with much more flexibility and power effectivity sooner or later, the manufacturer is increasing the portfolio to include a brand new form of wide-range speed management. 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 control range greater than 1:200. This considerably expands the vary of applications. With PMSMs, it’s not needed 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 remain compact and simple to wash. The latter function predestines them for hygienic purposes. ตัววัดแรงดัน over the whole management range in accordance with energy efficiency class IE5+ also reduces vitality prices, thus ensuring a decrease complete value of possession (TCO).
The diaphragm metering pumps in the LEWA ecodos collection are notably nicely suited for applications in the meals or pharmaceutical industries. All materials in touch with the fluids used in the pump items meet the FDA and USP Class VI requirements, and the EU directives for the food trade. 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 in touch with the product.
The motor applied sciences used so far have needed to make sacrifices: “For basic asynchronous motors whose rotor is a squirrel-cage rotor, the control range stays restricted to 1:10 (1:50 is feasible in particular person cases). With encoder suggestions, important expansion is possible,” said Maurice Wirkner, an utility manager at LEWA. “In addition, the drive is relatively inefficient exterior the rated velocity vary – particularly 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 cover the complete control vary (1-210 pump strokes), nevertheless, they are dearer to buy and in addition, require a servo inverter for management.
Wide-range speed management with everlasting magnet synchronous motor extends the vary of purposes
LEWA has now expanded its own portfolio with a drive expertise 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 different things, it options an extreme control vary, which frequently makes the usage of multiple pumps for different flow rates unnecessary.” Particularly in the case of multiple pumps, an extra manual stroke adjustment or electrical stroke adjustment can be dispensed with and the required flow rate may be realized by speed management solely. The PMSM also has a continuing torque. The complete torque could be utilized from engine pace zero rpm (standstill) as much as the rated pace of the motor. This ensures significantly clean and gentle system start-up, since every process could be started with a pump capacity of 1 percent instead of the identical old 10 %.
It also includes a high short-term overload capacity, which allows a drive design with out oversizing for the starting torque. As a end result, smaller, extra cost-efficient sizes can be realized than with traditional drives. “Like the asynchronous motor, the PMSM may be controlled via a standard frequency converter, so users can depend on common elements,” Wirkner defined. “With the servomotor on the contrary, it might be necessary to buy costly servo controllers.” The compact drive can be easily cleaned because of its fanless design and offers high IP safety. If required a further conversion course of – known as nsd tupH – can be applied to the aluminum physique for FDA requirements. This makes the floor extraordinarily resistant and even simpler to scrub – ideal for applications with stringent hygienic requirements, such as aroma metering in the meals trade or additive dosing in the pharmaceutical industry.
IE5+ PMSM permits value discount and decentralized options
The sole limitation of the currently used PMSM is that it is only available for safe areas. “Thanks to wide-range speed management with IE5+ PMSM, we will meet the rising customer demands for a wider adjustment vary and decrease energy consumption, as properly as total prices,” mentioned Wirkner to sum up the scenario. “The subject of power effectivity particularly is becoming more and more necessary for our prospects. A decentralized resolution by which the frequency converter is installed instantly on the PMSM, can now be implemented with Getriebebau NORD GmbH & Co. KG, LEWA’s motor companion for PMSM, too.”
LEWA GmbH was founded in 1952 by Herbert Ott and Rudolf Schestag as a family business and is right now the world’s leading producer of metering pumps and course of diaphragm pumps as nicely as full metering packages for process engineering. Headquartered in Leonberg, the corporate developed into a global group in just some many years. Since 2022, the corporate has been a half of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum options, generators, 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 firm, LEWA develops applied sciences and offers solutions for the huge array of functions amongst its customers. Its merchandise are used primarily within the chemical industry, the cosmetics trade, prescription drugs and biotechnology, meals and beverage business and power utilities as properly as within the production of plastics, detergents and cleaners. Additional application areas embrace refineries and petrochemicals, the oil and gas business, and gas odorization. LEWA presently employs around 1,200 folks and owns 14 subsidiaries all over the world alongside having eighty representatives and gross sales offices in additional 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 purposes to be lined by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby food.jpg
Caption: The PMSM also has a continuing torque, i.e. all of the torque may be known as up at velocity zero rpm. This ensures notably easy and mild system start-up, since every course of may be started with a conveyance price of 1 % as an alternative of the standard 10 %. (Example: Metering omega 3 fatty acids within the production of baby food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs shown, the constant torque of the PMSM permits continuous operation at low speeds. Oversizing for the required pump beginning torque has become pointless as a end result of high overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM may be managed by way of a regular frequency converter (NORD, Danfoss, and so on.) with particular parameterization, so that users can depend 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 options by which the frequency converter is put in instantly on the PMSM are also already attainable 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 initial practical testing with the NORD PMSM prototype and an ecodos pump on the pump test bench. In the lower speed range above all, the PMSM efficiently demonstrated the advantages of constant torque: the ecodos check pump might be pushed in a variety of 1:480 up to 5 bar.
Source: LEWA GmbH
More info 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 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
Share

Latest Post