Hannover Fair 2005: ABB’s new generation large induction motors

Large-sized induction motors are not frequently introduced, so the launch of a new generation of motors by ABB at Hannover Fair was noteworthy.

By Control Engineering Staff April 28, 2005
Development work on AMI Series motors was based on recognized standards, resulting in a product that fully supports IEC 60034 and NEMA MG1.

Large-sized induction motors are not frequently introduced, so the launch of a new generation of motors by ABB at Hannover Fair was noteworthy. New AMI Series induction motors are intended to replace existing AMB Series motors in IEC frame sizes 560, 630, and 710, which represent the mid range of ABB’s modular induction motor offerings that run from 315 to 1,120 mm frame sizes. AMI Series induction motors increase output per frame size by up to 10%, compared to predecessor motors to reach power levels of 11,000 kW (15 000 hp).

Among advantages of AMI Series are very low vibration levels, low noise, and 2-pole stiff shaft motors favorable for variable-speed drive applications, according to Johannes Ahlinder, business development for ac-machines, at ABB Automation Technologies AB in Sweden. “AMI Series is designed for installation in nearly all types of environments, from very cold (-50 °C) to very hot (up to 60 °C), from safe area to hazardous area, and from indoor to offshore installations,” says Ahlinder.

Reduced noise and vibration levels enhance daily usage of these motors. Noise level—less than 82 dB(A) throughout the motor operating range—can be further reduced with standardized options, he notes. Stiff shaft design of the overall construction enables smooth running in variable-speed drive applications. It further reduces vibration for added motor reliability and lifetime. Numerous options widen the application flexibility of AMI Series induction motors. “All in all, the new motor is able to meet almost any specific customer requirements,” adds Ahlinder. These motors will be available in North America in June 2005, according to ABB.

—Frank J. Bartos, executive editor, Control Engineering, fbartos@reedbusiness.com