The Journal of Industry and Technology

Industrial Analytical Instrumentation

Euro Technology

Serving industry for over 36 years
Three leading magazines for key executives,  engineers, universities,
manufacturers, laboratory technicians, scientists, and research establishments

Automation and control

Updated motor portfolio for general industrial applications

WEG has extensively updated its portfolio of standard industrial motors with the W40, W50 and W60 series. Thanks to the optimised design, the new compact three-phase induction motors deliver reliable high performance even under adverse conditions.

WEG, a leading global supplier of drive technology, recently updated its portfolio of standard industrial motors to incorporate advanced technology, resulting in the W40, W50 and W60 motors series. The motors collectively cover the power range from 90 to 4,250 kW at frequencies of 50 and 60 Hz. The three-phase induction motors are suitable for nearly all industrial applications requiring high performance and reliability, including pumps, compressors and fans. The design has been optimised to make the motors more compact than their predecessors, with lower weight, smaller dimensions and a reduced footprint. With sturdy, innovative grey cast iron housings, they are suitable for use under extremely adverse conditions and assure low noise and vibration levels. Optimised rotor and stator laminations together with improved motor cooling give an especially high power density (ratio of output power to weight), making the standard industrial motors in the W40, W50 and W60 series among the most efficient of their sort on the market.   

Image 1: WEG2137_W60: The sturdy, efficient motors in the W60 series are ideal for demanding applications with high motor speed or shaking loads.

Image 2: WEG2137_W50: The high performance of the W50 motors makes them ideal for high-speed applications, even under adverse conditions.

Image 3: WEG2137_W40: The W40 motors combine extreme compactness with high efficiency and performance for a wide variety of applications, in particular compressors, fans and pumps.

The two-pole and four-pole motors in the W60 series are available in frame sizes from IEC450 to IEC560, with rated power from 800 to 4,250 kW and rated voltage from 2,300 to 10,000 V. To maximise application flexibility, the motors are available in three configurations: open and self-ventilated (IC01, WP-II), closed and air/air-cooled (IC611, TEAAC) and closed with air/water heat exchanger (IC81, TEWAC). Thanks to their compact design, the motors have a smaller footprint and are the shortest modular motors of their sort on the market. Noise and vibration levels are especially low thanks to sturdy construction with a high-quality grey cast iron frame and shield as well as a true stiff motor shaft that eliminates critical flexural vibrations below the rated speed. This makes the W60 motors a good choice for applications with frequency inverter operation or strong shaking loads. High-quality rotor and stator laminations, high-efficiency fans and optimised heat exchangers enable the motors in the W60 series to achieve above-average efficiency and power density.

The W60 motors are designed for continuous use and are easy to install and commission. They are also ideal for use with medium-voltage frequency inverters as standard motors with no speed restrictions due to critical vibration speeds. The WEG medium-voltage frequency inverters of the MVW0s series are perfect partners. The motors are fitted with roller bearings as standard, but they are optionally available with sleeve bearings. Their modular structure allows users to adapt the motors to their specific applications by adding optional accessories such as differential pressure switches for air cooling, leak detectors for water cooling, an automatic lubrication system for ball bearings, or encoders.

The W50 series is very similar to the W60 series in design and construction, featuring a compact and sturdy grey cast iron frame and high power density. W50 motors with two to twelve poles are available in frame sizes from IEC315 to IEC450, rated power from 90 to 1,280 kW, and rated voltage from 440 to 6,600 V. They also feature low noise and vibration levels (82 dB at 3,600 rpm) and are available with protection ratings from IP55 to IP66. The motors are fitted with ball bearings as standard and are optionally available with sleeve or roller bearings. The W50 motors have IC 411 cooling in accordance with EN 60034-6 and are designed for frequency inverter operation. In particular, the stiff motor shaft eliminates speed restrictions due to critical internal vibrations at motor speeds up to 3,000 rpm at 50Hz and 3,600 at 60Hz in frequency inverter operation. The W50 series is available with mounting options B3, B5, V1 and V6.

The open drip-proofed (ODP) W40 motors with two, four or six poles are the smallest members of the standard industrial motors family and are only suitable for applications where dirt and moisture are not factors. They are available in frame sizes from IEC280L to IEC450 with rated power from 250 to 1,650 kW for low and medium voltages. They have IP23 or IP24 protection rating. These modular motors also feature especially low noise and vibration levels, with slight differences between the various models (ODP, WI and WII).

WEG in profile
A global major in the power distribution, automation and control sectors, WEG has recently celebrated its 50th birthday. The company's global sales now exceed the US$3-billion mark, representing increasing global success across a wide range of product groups, including the latest generation of transformers, LV control gear, generators, gear motors, inverter drive systems, soft starters, LV and HV motors, ATEX- compliant explosion proof motors, smoke extraction motors and full turnkey systems. In addition, WEG has recently made a significant strategic expansion of its product portfolio, following the establishment of a joint venture for the manufacturing of wind turbines and the purchase of an Austrian gearbox manufacture, WATT Drive.

For further information about WEG's energy efficient solutions, e-mail:
, or view website: 

New large explosion-proof W22X motors with high efficiency

WEG, has added a larger IEC 800 frame size model to its energy-efficient W22X series of explosion-proof motors to meet the needs of the most demanding energy-intensive applications, for example in the oil and gas industry. Designed for medium-voltage and high-voltage applications, the new frame size motors deliver excellent performance with an efficiency of up to 97.4% and ensure low maintenance and operating costs, making them ideal for applications where harsh environmental conditions demand high reliability and robustness without compromising on energy efficiency.

One reason for the motor's high efficiency is its innovative stainless steel tubular cooling system (IEC 60034-6 IC511) which provides optimal air flow and delivers maximum cooling capacity in the stator, rotor, and critical components such as bearings. Additionally, aerodynamically designed fans and fan covers help produce effective air flow with the lowest possible noise level. Hot spots are also avoided by ensuring uniform temperature distribution in the entire frame, therefore providing reliable, high performance over a long service life.

Image 1 left: The new W22X 800 explosion-proof motor for medium-voltage and high-voltage applications combines robustness with high efficiency.

Image 2 right: The tubular cooling system of the W22X 800 contributes to its high efficiency by providing effective heat dissipation.

The W22X 800 motors offer ultimate flexibility to the user as they are available with many mounting options including an IM B3 mounting as standard together with various mounting assembly/terminal box arrangements and a flex-resistant welded steel frame with IP55 protection rating and large integrated mounting feet. The robust housing allows the explosion-proof motors to be used in the most demanding applications while minimising vibration and noise emissions.

The W22X 800 motor is available as 2, 4, 6 and 8 pole versions with alternative speeds available on request, and is rated from 2 to 5.6 MW with supply voltage from 6.6 to 11 kV at 50 or 60 Hz. Motors of this size would typically be designed as bespoke, but WEG now offers a standard product with many optional modules in response to increased demand. As such the motor can be customised easily and optimised for individual applications. It is also available to suit different ambient temperatures (-55°C to +60°C), protective devices (surge protectors, capacitors, inverters), terminal boxes (number, position and type), protection ratings (IP56, IP65 or IP66) or variable speed drives.

"WEG is committed to helping business across industries such as oil and gas and mining increase reliability and energy efficiency while bringing maintenance and operating costs down," says Marek Lukaszczyk, European & Middle East Marketing Manager at WEG. "The new W22X 800 motors are the latest addition to our W22X line of explosion-proof motors that have been designed to meet the most demanding applications without compromising on energy efficiency."

WEG's entire W22X product line is available worldwide and compliant with major international standards. For example, the W22X 800 presently has ATEX and IEC Ex certification for Ex d(e) IIB T4 Gb, for mining (Group I) and conductive dusts (Group III), with pending certification for Ex d(e) IIC T4 Gb and regional certifications including GOST, CCOE and INMETRO. With its broad W22X portfolio in frame sizes from IEC 71 to IEC 800, WEG has the ideal explosion-proof motor solution for virtually every situation from gas pipelines in the Arctic to drilling rigs in the hottest parts of the Arabian Desert.

For further information, view website:  Refer to page 320

Quick page links - Display rates - Features - Magazine profile - Home page - Company index - Page 244

Industrial and Technological Publications
Leading the way in on-line magazine publishing
The Journal of Industry and Technology - Euro Technology - Industrial Analytical Instrumentation
Title registered in London 1978. Registration number 2334966

Twitter: - Twitter: - Twitter: www,
Google+: Linkedin:
Google+:  Google+: /+Industrialanalyticalinstrumentation21IA
Follow on Facebook: