The Dyson digital motor V4 was seven years in the making - it's one of the world's smallest fully-integrated 1400W motors. It's the only hand dryer motor powerful enough to draw in 28 liters of air a second through a HEPA filter, and then dry hands in 12 seconds.**
This long-life, energy-efficient motor is digitally switched at 6,100 times per second, making the high compression fan spin 92,000 times a minute. There are only three moving parts, so there are no slip rings or carbon brushes to wear down.