n TECHNOLOGY March 2024 www.drivesncontrols.com 18 ABB HAS LAUNCHED a liquid-cooled version of its SynRM (synchronous reluctance) motor, combining the bene ts of IE5 energy eciency with eective cooling. The motors, which were rst previewed at the SPS exhibition in 2022, can save energy and cut emissions in new projects or as drop-in replacements for less ecient motors. The liquid-cooled motors are available in aluminium frame sizes IEC 200-315, spanning ratings from 37-710kW at 400V, or in steel frames on request. The motors’ high power outputs increase design exibility. They allow machines to be upgraded to deliver higher outputs from the same footprint, or to achieve smaller footprints while maintaining the same output. The motors are also much lighter than competing designs, making them easier to handle and install. A 240kW IE5 SynRM motor in a 315 frame weighs 870kg – about half as much as a similarly rated IE3 induction motor. In addition, the liquid-cooled SynRM motors are much more ecient than liquid-cooled induction motors, oering signi cant potential for upgrading. The cost of the energy to run a motor throughout its life accounts for around 97% of its TCO (total cost of ownership), with its purchase cost accounting for about 2%. IE5 motors have 40% lower energy losses than IE3 motors, making the payback time often less than a year. Reliability is said to be improved by combining the eective cooling of the motor with the cool-running rotor and cooling ribs on the bearing assembly that lower bearing operating temperatures. This should help to reduce the need for maintenance. The motors are robust, with tight seals to keep out moisture, dirt and dust, and a smooth outer surface to stop dust building up. They are suitable for demanding applications, such as marine propulsion, that require high power densities in restricted spaces. Furthermore, the motors do not need fans or ventilation, so they will not disturb the surrounding air or release heat into the environment. This is a major bene t in processes that are aected by airow – such as rubber and plastics production, or chocolate-making. With no fans, the motors also have low noise levels. “ABB pioneered both SynRM technology and liquid cooling for induction motors,” says Stefan Floeck, president of ABB’s IEC Low-Voltage Motors division. “Now we have brought them together in our IE5 SynRM Liquidcooled motor that enables customers to enjoy the bene ts of ultra-premium eciency in an even wider range of applications. It is yet another world- rst for this series following the launch of our IE5 SynRM Increased Safety motor for hazardous areas.” https://new.abb.com OMRON HAS LAUNCHED a conditionmonitoring device that automates the detection of abnormalities in servomotors or induction motors that change speed or load rapidly. By analysing more than 400 parameters derived from current and voltage measurements, the K7DD-PQ device can detect failure modes such as worn blades or deteriorating bearings. It is said to eliminate the need to rely on the experience and senses of skilled workers, reduce inspection eorts, and avoid unexpected equipment failures. As well as monitoring rotating machines, the device can also be used to check nonrotating equipment such as solenoid valves. It captures mechanical errors in rotating machines by measuring the voltage and current being drawn by a machine and converting them to derived values such as power and harmonics. It uses these values to explore the correlation between the data and changes in the motor conditions. A high-speed (2.5μs) sampling technology is said to capture even the most eeting anomalies, while its sixchannel simultaneous/continuous capability processes data without any omissions or deviations. The device can detect anomalies in motors caused by gaps between the rotor and stator, or by changes in torque. It oers self-contained condition monitoring, eliminating the need for complex installations or for cloud-based systems. It can be retro tted to control panels to provide local monitoring and immediate detection of any anomalies. The monitor is said to keep pace with variable-speed equipment, reducing inspection workloads. It simpli es data analysis by choosing the appropriate parameters automatically and setting thresholds, and using these to identify various failure modes and their root causes. https://industrial.omron.eu Motor-monitoring device checks 400 parameters to avoid failures Liquid-cooled SynRM motors set new benchmarks for efficiency and output ABB’s liquid-cooled synchronous reluctance motors combine IE5 e ciencies with high performance Omron’s motor monitor is designed to prevent unexpected failures by examining di cult-tomeasure failure modes
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