Product category:
Industrial Motors
News Release from: ABB Automation Tech (Drives and Motors) | Subject: AMI series induction motors
Edited by the Engineeringtalk Editorial
Team on 28 August 2006
Modular motors handle more power and cut
vibration
Modular induction motors can be tailored to specific applications, including the harsh environments in industries such as oil and gas exploration, chemical manufacturing and metals processing.
AMI series induction motors from ABB, ranging from 500 to 11,000kW, feature a modular construction, enabling tailoring to specific applications, including the harsh environments in industries such as oil and gas exploration, chemical manufacturing and metals processing The motors are engineered and constructed using a series of modular building blocks to provide a complete range of enclosures and cooling arrangements
This article was originally published on Engineeringtalk on 8 Feb 2000 at 8.00am (UK)
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Available options include air-to-water and air-to-air cooling, as well as a weather-protected version.
Protection classes range from IP24W to IP56.
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The AMI series squeezes an extra 10% of power from each frame when compared with its predecessors, enabling users to opt for smaller, lighter motors to fit a given duty.
This is an obvious advantage wherever space is tight.
In addition, standard models keep noise levels below 82dB(A), with some options reducing noise even further.
This enables the motors to deliver a safer, more comfortable working environment for operators.
The basic framework of the new motors (IEC frames 560, 630 and 710) provides a proven platform, with new features developed using ABB's broad experience and a systematic process of design and review.
Low vibration has been a design priority for the AMI series.
Less vibration reduces wear and tear, prolonging the life of the motor and surrounding equipment.
A two-pole stiff shaft rotor design is available for motors controlled by variable speed drives, which ensures that the motor can operate at any and all speeds within its 0-4000rev/min range; because its first critical speed (the speed at which a motor starts to resonate) is higher than the maximum running speed of the motor.
In addition, low levels of vibration in the bearing housing enable AMI motors to meet the latest IEC and NEMA standards, as well as API and most similar specifications.
The motors have form wound windings with ABB's well-established Micadur Compact Industry Insulation System insulation class F (155C).
The Micadur system involves insulating the motor's windings and connections with mica-based tape.
With the windings in place, the whole stator is impregnated with a high-temperature varnish using a vacuum pressure impregnation process.
This provides effective insulation that boosts the reliability and life of the motor.
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