[githulhu]

"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.

[jonah]

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...