Dyson claims to have developed the world's fastest, most efficient motor for domestic appliances. The Dyson Digital Motor (DDM) v2 is a single-phase brushless DC motor, which operates at speeds up to 104,000 rpm with a claimed efficiency of 84%.
Dyson's first digital motor, announced in 2003, used switched reluctance technology.
"Our new digital motor is small, fast, efficient and tough," says the company's chief executive, Sir James Dyson (shown above with the new motor (the small one) and and an older equivalent (the big one)). "Its ability to control impeller speed and energy use puts it in a new class of clean motor."
The 200W motor, developed over the course of about ten years by Dyson's 45-strong team of motor developers, is protected by 15 patents. The company expects to use the motors in about 1.2 million appliances this year. Initiallythey will be used in battery-operated vacuum cleaners.
The motor technology "opens up diverse engineering possibilities," the Dyson says, "powering smaller, lighter, greener appliances".
Dyson says that the brushless motors are twice as efficient as the brushed motors that it used previously. This will give the portable vacuum cleaners a battery life of ten minutes with constant high levels of suction. A high-power mode gives six minutes of higher suction to deal with stubborn dirt or muddy footprints.