Electronics Weekly
Instead of the usual arrangement, the high-speed motor and fan are in the handle, and what would normally be the body of the dryer is now am annular nozzle with a hole right through the middle – much like the firm’s eye-catching room and office fans.
“The hair dryer is powered by the patented Dyson V9 digital motor, created in-house by a team of over 15 motor engineers specifically for this machine. It is Dyson’s smallest, lightest, most advanced digital motor,” said the firm. “It is up to eight times faster than other hair dryer motors and half the weight.”
Half the weight of what?
The 10 best-selling hair dryers in Japan as of March 2015, said the firm, which has pioneered very high-speed (~100,000rpm) switched-reluctance and brush-less permanent magnet motors in domestic appliances – the parameters of this one are below.
On the air-flow front, Dyson said that by using an axial flow impeller inside the motor it has simplified the pathway of the air reducing turbulence and swirling. And by giving the motor impeller 13 blades instead of the usual 11 it has pushed one tone within the motor to a sound frequency beyond the audible range for humans.
Further sound reduction comes from surrounding the motor by some form of acoustic silencing.
Update: This seems like the smartest hair dryer ever:
According to Dyson, a microprocessor oversees the electronics, which control of the motor, heating element and ioniser.
The single-phase sensorless brushless dc (so permanent magnet) motor runs at 115,000rpm off rectified mains, driven by two FETs.
Multiple safety systems include a thermistor for the heating element, a bi-metal strip and a thermal fuse.
13 litres per second passes through the motor fan, multiplied by three due to viscous entrainment and inducement at the head.
Branded ‘Supersonic’ the Dyson hair dryer is priced at £299.
For those interested in its hair drying capability, there is a Supersonic review in the Irish Independent.
