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ABB launches new liquid-cooled IE5 SynRM maritime motor

February 07, 2024

ABB has launched a new version of its IE5 SynRM (synchronous reluctance motor) series. This new design combines ultra-premium energy efficiency with highly effective liquid cooling.

These motors are suitable for a variety of industries, including marine propulsion, rubber and plastics production, and food and beverage.

The IE5 SynRM Liquid-cooled motors are lighter than competing designs, making them easy to handle and install. A 240 kW IE5 SynRM motor in frame size 315 weighs 870 kg, almost half the weight of a corresponding IE3 induction motor. These motors are available in frame sizes IEC 200-315 in aluminum frames, with steel available on request. They provide performance over a range of powers from 37 to 710 kW at 400 V.

ABB mentioned that the IE5 SynRM Liquid-cooled motors are more efficient than traditional liquid-cooled induction motors, offering significant potential for upgrading with energy-saving technology. Energy efficiency is crucial for optimizing the total cost of ownership (TCO) of an electric motor, as the cost of the energy to run it throughout its life accounts for around 97 percent of a motor’s TCO. IE5 motors have 40 percent lower energy losses than commonly used IE3 motors, often resulting in a payback time of less than one year when selecting an IE5 instead of an IE3 motor.

The reliability of these motors is improved by effective cooling, a cool SynRM rotor, and cooling ribs on the bearing assembly that reduce the operating temperature of the bearings. This increases the lifetime of this key component and reduces maintenance needs. The motors are robust, with tight seals to keep out moisture, dirt, and dust, and a smooth outer surface to prevent dust build-up. They do not need fans or ventilation, reducing noise levels and preventing the release of heat into the local environment.