Hacker News Reader

"17,000 rpm with digital pulse technology" ... I guess that means a PWM DC motor controller?

"Digital motor" raised my eyebrow too. Apparently it's this: http://en.wikipedia.org/wiki/Reluctance_motor

Guess marketing didn't think "Reluctance motor" had quite the same ring, and I'd tend to agree.

Linked from that page is this article which goes into the design and development of the motor a bit: http://www.electronicsweekly.com/news/design/power/dyson-vac...

Correction, it's a 73,000 rpm motor!