In many purposes, metering ingredients within the pharmaceutical or meals business for instance, pumps are required that not solely may be precisely managed in terms of flow price and dosing time, but also convey the elements particularly gently. To allow the proven pump items of the ecodos series from LEWA GmbH to meet this demanding activity with much more flexibility and power efficiency in the future, the producer is expanding the portfolio to incorporate a model new form of wide-range pace management. Alongside asynchronous motors and servomotors, everlasting magnet synchronous motors, or PMSMs for brief, are additionally used now. They are characterized by excessive vitality effectivity and a control vary higher than 1:200. This considerably expands the vary of applications. With PMSMs, it is no longer necessary to use a quantity of pumps for various flow rates or oversize asynchronous motors for low speeds. Since PMSMs can be designed without a fan, they remain compact and simple to wash. The latter feature predestines them for hygienic applications. High efficiency score over the whole control vary in accordance with energy effectivity class IE5+ also reduces energy costs, thus ensuring a lower complete price of possession (TCO).
The diaphragm metering pumps within the LEWA ecodos series are notably properly fitted to functions within the food or pharmaceutical industries. All supplies in contact with the fluids used in the pump items meet the FDA and USP Class VI requirements, and the EU directives for the meals business. In the hygienic model, for instance, the pump head is made of PP or electropolished stainless steel with a floor roughness < 0.5 µm. This facilitates cleaning of the surfaces involved with the product.
The motor applied sciences used to date have needed to make sacrifices: “For classic asynchronous motors whose rotor is a squirrel-cage rotor, the control range remains limited to 1:10 (1:50 is possible in individual cases). With encoder suggestions, significant expansion is possible,” mentioned Maurice Wirkner, an software supervisor at LEWA. “In เกจวัดแรงดันออกซิเจนราคา , the drive is relatively inefficient exterior the rated speed range – particularly at low speeds. This requires the drive to be outsized, which will increase working prices.” Servomotors are optimized for highly dynamic necessities and likewise cover the complete control vary (1-210 pump strokes), however, they are more expensive to purchase and in addition, require a servo inverter for control.
Wide-range speed management 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 permanent magnets and rotates synchronously, i.e. with out load-dependent slip,” Wirkner defined. “Among different things, it features an excessive management range, which often makes the use of multiple pumps for various flow charges unnecessary.” Particularly within the case of multiple pumps, an additional guide stroke adjustment or electric stroke adjustment can be dispensed with and the required move price can be realized by pace control only. The PMSM also has a relentless torque. The complete torque may be utilized from engine pace 0 rpm (standstill) as much as the rated pace of the motor. This ensures significantly clean and delicate system start-up, since every process may be started with a pump capability of 1 percent as an alternative of the usual 10 percent.
It also includes a excessive short-term overload capability, which allows a drive design without oversizing for the beginning torque. As a end result, smaller, extra cost-efficient sizes may be realized than with classic drives. “Like the asynchronous motor, the PMSM could be controlled through a standard frequency converter, so customers can rely on widespread elements,” Wirkner explained. “With the servomotor on the contrary, it would be necessary to buy costly servo controllers.” The compact drive could be easily cleaned because of its fanless design and provides excessive IP safety. If required a further conversion course of – called nsd tupH – could be applied to the aluminum body for FDA requirements. This makes the surface extraordinarily resistant and even easier to scrub – best for functions with stringent hygienic requirements, corresponding to aroma metering in the food business or additive dosing within the pharmaceutical trade.
IE5+ PMSM enables cost reduction and decentralized solutions
The sole limitation of the at present used PMSM is that it is only obtainable for safe areas. “Thanks to wide-range velocity management with IE5+ PMSM, we will meet the rising buyer demands for a wider adjustment vary and decrease energy consumption, as nicely as overall prices,” said Wirkner to sum up the state of affairs. “The matter of vitality effectivity particularly is becoming increasingly important for our prospects. A decentralized resolution during which the frequency converter is installed instantly on the PMSM, can now be applied with Getriebebau NORD GmbH & Co. KG, LEWA’ pressure gauge ราคา for PMSM, too.”
LEWA GmbH was founded in 1952 by Herbert Ott and Rudolf Schestag as a household enterprise and is today the world’s leading manufacturer of metering pumps and course of diaphragm pumps as well as full metering packages for course of engineering. Headquartered in Leonberg, the corporate developed into an international group in just some a long time. Since 2022, the corporate has been a part of the Atlas Copco Group, a globally leading Swedish producer of compressors, vacuum solutions, turbines, pumps, power tools and assembly systems. Together with the brand new proprietor, LEWA will further broaden the economic pumps enterprise. As a analysis and manufacturing firm, LEWA develops technologies and supplies options for the vast array of applications among its customers. Its merchandise are used primarily in the chemical business, the cosmetics trade, prescribed drugs and biotechnology, meals and beverage industry and vitality utilities in addition to within the production of plastics, detergents and cleaners. Additional application areas include refineries and petrochemicals, the oil and fuel business, and gas odorization. LEWA at present employs around 1,200 individuals and owns 14 subsidiaries all over the world alongside having eighty representatives and sales places of work in more than eighty countries.
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 management vary of 1:200, enabling a wider range of applications to be covered by the same drive or pump.
Source: LEWA GmbH
Image ID: Baby meals.jpg
Caption: The PMSM additionally has a constant torque, i.e. the entire torque could be called up at velocity 0 rpm. This ensures notably easy and mild system start-up, since every process can be began with a conveyance price of 1 percent as a substitute of the same old 10 percent. (Example: Metering omega 3 fatty acids in the production of child food)
Source: Adobe Stock
Image ID: Torque.jpg
Caption: In distinction to the ASMs shown, the constant torque of the PMSM enables continuous operation at low speeds. Oversizing for the required pump beginning torque has turn into unnecessary as a result of high overload functionality of the PMSM.
Source: LEWA GmbH
Image ID: Baugrößen_530PWebJPG.jpg
Caption: Like the asynchronous motor, the PMSM can be controlled through a standard frequency converter (NORD, Danfoss, and so forth.) with particular parameterization, so 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 by which the frequency converter is installed immediately on the PMSM are also 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 initial practical testing with the NORD PMSM prototype and an ecodos pump on the pump check bench. In the decrease velocity vary above all, the PMSM efficiently demonstrated the advantages of constant torque: the ecodos take a look at pump might be driven in a range of 1:480 as a lot as 5 bar.
Source: LEWA GmbH
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