It’s almost impossible to think of a business that doesn’t use electric motors. In industry, they power the manufacturing processes, and in virtually every commercial building they drive the systems that provide a comfortable working environment. Motors also use a lot of energy. According to the Carbon Trust, a 2.2 kW motor typically costs around £2,300 a year to run. This makes energy efficiency of motors a key concern for every business owner and manager, says Julian Grant of Chauvin Arnoux.