Low and High Voltage Machines
WEG’s long experience with Electric Motors can be glimpsed as well with market leading design and innovation with Low and High Voltage Machines for industrial applications. WEG’s innovation can be found in the Low and Medium Voltage H Line Electric Motors, the W22 Medium Voltage Electric Motors, the many variations in the M Line of Low and High Voltage Machines, DC Motors, Synchronous Machines as well as specialty machines like the WGM Line Water Jacket Cooled Motors, Top Drive Motors and Mudpump and Draw Works Machines.
W22 Medium Voltage Electric Motors
The new WEG W22 line of Electric Motors is also available in a medium voltage variant. Medium voltage W22 motors are available from 125 to 600HP with voltages ranging from 2300 to 6600V. They have 2, 4, 6 and 8 pole options in NEMA frames 449T, 586/7T and 588/9T. These motors have a 4140 steel shaft and RTD’s (2 per phase). Like their low voltage brethren, the medium voltage W22 motors are TEFC IP55 with a top mounted terminal box for added flexibility.
WEG Open Dripproof (ODP) Medium Voltage Electric Motors
WEG ODP medium voltage motors are available in 2 and 4 pole from 1200 to 5000V. They have a 1.15 Service Factor, RTD’s (2 per phase) and 4140 steel shaft. Similar to the W22 motors, they have a top mounted terminal box for more flexible mounting options.
HGF Low and Medium Voltage Machines
H Line Machines offer a versatile product for many applications. They are available from NEMA frame 5006 to 9610 with vertical or horizontal mounting options and an optional API 541 rating. ANSI/API Standard 541 covers the minimum requirements for form-wound squirrel-cage induction motors 500 horsepower (HP) and larger for use in petroleum industry.
HGF low voltage machines are available from 250 to 2500 HP and from 460 to 690 V. Medium Voltage variants offer outputs from 150 to 5000 HP with input voltages from 1200 to 11000V
M (Master) Line Machines
M Line motors are manufactured in different configurations in reference to cooling methods and degree of protection. As a result, a motor configuration can be defined in such a way to better meet operating and environment conditions. Motor supplied in frame sizes NEMA 4400 to 8000 (IEC 280 to 450) are manufactured in cast iron frames. Those motors manufactured in frame sizes NEMA 8800 (IEC 500) and larger have their frames built in welded steel plates.
These machines have output ratings up to 70,000 HP with voltages from 220 V to 13.8 kV. The machines are available from 2 to 12 poles (3600 to 300 RPM). The Master Line provides users with benefits in efficiency, a large range in degree of protection (IP rating), reduced noise levels and lower and easier maintenance. A choice between Slip Ring (wound rotor) or Squirrel Cage rotor and between oil lubricated sleeve bearings or grease or oil lubricated ball or roller bearings provides the M Line with the versatility to meet the demands of a variety of applications.
WGM Water Jacket Cooled Motors
The water jacket cooled WGM motors were designed to meet the increasing demand for compact and reduced noise level machines, where high output power versus frame size ratio is required.
The water cooling system for WGM motors is provided by circulation of water over the frame construction and endshields. Besides allowing an effective thermal exchange between motor and the water, this cooling system reduces the temperature of the hoses along the grooves and increases the output power versus frame size ratio.
Additionally, this system maintains the thermal efficiency, even at reduced speeds, which allows the application of this motor with frequency drives at high speed range on severe application that requires constant torque.
The water cooling system also minimizes the heat exchange with the environment, cools down the bearings without requiring independent cooling system along with keeping low noise level.
DC Motors
WEG also has a very vast line of DC Motors offering outputs of 150 to 5000 HP. DC Motors are available with IP Ratings of IP23, IP44 or IP55.
Specialty Machines
WEG also offers many specialty machines including Synchronous Machines, Top Drive Motors, Mudpump and Draw Works Motors Offshore machines and drop in replacements for competitive machines.
WEG Top Drive Variable AC Motors are built with high density magnetic steel and windings providing twice the peak torque as conventional AC motors.
WEG Top Drive Variable AC Motors have been built for use in variable speed PWM controller applications where fast response to speed commands and high speed torque are required. They are designed to virtually eliminate motor damaging reflective wave problems. WEG Top Drive motors are up to three frame sizes smaller which allow for reduced rotor inertia and weigh less than NEMA frame motors. WEG Top Drive motors are ideal for applications requiring wide constant torque and constant horsepower ranges, including continuous operation at stall.
