n MOTORS – you only have to put in the energy you need to make up the system losses,” explains Torquemeters’ sales and marketing director, Geoff Robinson. “With the 2MW project, we were able to take advantage of this functionality to keep energy wastage to a minimum.” The rig is using a matched motor and drive package supplied by ABB. The motor is a modular 2MW machine from ABB’s Optimum Performance range, which also operates as a generator. The 0-75Hz AMI type 560mm-frame water-cooled design is optimised for use with ABB’s ACS880 liquidcooled, multi-drive converter with an Active Front End (AFE) regenerative rectifier. The LV drive includes a separate DC connection cabinet. The cabinet is L-shaped to fit in the test bay space, and to accommodate the liquid-cooling apparatus. The project was the largest test rig that Torquemeters has built in its 70-year history, and needed a more powerful motor and drive than it had used before. “Normally we would have to purchase the motor and drive separately and package them ourselves,” Robinson points out. “This was the first time we’ve used ABB, and we were extremely impressed with their project execution and product performance, particularly given the high performance rating of the system.” “We hope that our work here can help to pave the way for a revolution in greener transport,” says the test centre’s Chris Varley, “The PEMC sits at the centre of the future of propulsion, and we expect the University of Nottingham to be a key player in developing innovative electrification solutions for the transportation of tomorrow.” n The University of Nottingham’s Power Electronics and Machine Centre is used to future propulsion systems
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