I guess that his brushless motors are either 4:4 (ie 4 teeth both on stator and rotor) single phase switched reluctance motors (cheap motor and feed electronics but apt to be noisy) or 2 pole, single phase synchronous motors with a 'C-core' stator and a small-diameter rotor based on high-performance magnet material and possibly steel for strength. Neither basic configuration is new in my opinion but Dyson has done very well to develop good designs and impressive speeds in consumer products.
@oakapple5 The Digital Motor V2 was developed in Malmesbury, England, by Dyson's team of 45 motor engineers, over a period of about 10 years. It's manufactured in one of their their own facilities in Singapore, and protected by 15 patents. This is the sense in which Dyson mean it's 'new': it's not a pre-existing motor they purchase from a specialist manufacturer; before Dyson began making it, it didn't exist, and you can only find it in Dyson appliances.
Im a Dyson fluid dynamics engineer and worked on the Dyson Air multiplier fan (using dyson account to post). Its important to state that during the genesis of the machine we performed around 200 simulations with ANSYS Fluent to arrive at the 15x amplification factor, and verified it experimentally at every stage of the development. The cooling air velocity and flow rate provided to the user are comparable to conventional fan technology (up to 450 litres a second), but without buffeting.
To clean the loop amplifier, you just wipe it with a soft, dry cloth. The air intake can be cleaned with any vacuum cleaner - use a soft dusting brush.
Presumably, the chip (IC) reverses the polarity of the stator winding very rapidly and alternately either attracts or repels the magnet on the rotor? A conventional squirrel-cage induction motor relies on a heavy rotor (without magnet) to induce currents and swiching of polarity on the stator is controlled by the relatively low supply frequency, resulting in a larger, slower-running motor? Even with electronic control you couldn't make such a small, efficient,powerful motor as the DDM?
No - currently, the only models to use variations of the DDM are the DC12, some versions of the DC22, the DC30 and DC31 hand-helds, and the Airblade hand-dryer.
It is the beauty within the machine.
ParkRyan123 2 months ago
I guess that his brushless motors are either 4:4 (ie 4 teeth both on stator and rotor) single phase switched reluctance motors (cheap motor and feed electronics but apt to be noisy) or 2 pole, single phase synchronous motors with a 'C-core' stator and a small-diameter rotor based on high-performance magnet material and possibly steel for strength. Neither basic configuration is new in my opinion but Dyson has done very well to develop good designs and impressive speeds in consumer products.
oakapple5 10 months ago
@oakapple5 The Digital Motor V2 was developed in Malmesbury, England, by Dyson's team of 45 motor engineers, over a period of about 10 years. It's manufactured in one of their their own facilities in Singapore, and protected by 15 patents. This is the sense in which Dyson mean it's 'new': it's not a pre-existing motor they purchase from a specialist manufacturer; before Dyson began making it, it didn't exist, and you can only find it in Dyson appliances.
vintagehoover 10 months ago
How can this be a switched reluctance motor if it has a Neodymium rotor? this makes no sense
chrizzbee 1 year ago
I wonder if the Neodymium in the motor will lose its magnetism over time.
John27346 2 years ago
humm..i did not relize they had Neodymium Rare Earth magnets in them!
..
emagnets 2 years ago
how is this different from the brushless DC motor?
pumpSHO 2 years ago
@pumpSHO It spins at 104,000 rpm
zunehdrocks 1 year ago
Im a Dyson fluid dynamics engineer and worked on the Dyson Air multiplier fan (using dyson account to post). Its important to state that during the genesis of the machine we performed around 200 simulations with ANSYS Fluent to arrive at the 15x amplification factor, and verified it experimentally at every stage of the development. The cooling air velocity and flow rate provided to the user are comparable to conventional fan technology (up to 450 litres a second), but without buffeting.
dysonteam 2 years ago
How do you clean the air intakes and the impeller? Will I need a special Dyson vacuum cleaner? I think we should be told.
EddyBunter 2 years ago
To clean the loop amplifier, you just wipe it with a soft, dry cloth. The air intake can be cleaned with any vacuum cleaner - use a soft dusting brush.
There is no need to clean the impeller.
vintagehoover 2 years ago
Presumably, the chip (IC) reverses the polarity of the stator winding very rapidly and alternately either attracts or repels the magnet on the rotor? A conventional squirrel-cage induction motor relies on a heavy rotor (without magnet) to induce currents and swiching of polarity on the stator is controlled by the relatively low supply frequency, resulting in a larger, slower-running motor? Even with electronic control you couldn't make such a small, efficient,powerful motor as the DDM?
1334gordonsm652 2 years ago
Correct, the DDM's chip changes the magnetic poles 3000 a second,
vintagehoover 2 years ago
*3000 times...
vintagehoover 2 years ago
does the DC28 have this motor?
genmac1 2 years ago
No - currently, the only models to use variations of the DDM are the DC12, some versions of the DC22, the DC30 and DC31 hand-helds, and the Airblade hand-dryer.
vintagehoover 2 years ago
so no uprights yet
genmac1 2 years ago
Not yet - although I'm sure they're just on the horizon!
vintagehoover 2 years ago
awesome cause this motors sounds real sweet!
genmac1 2 years ago
Awsome!
kirbyclassic 2 years ago
Thanks heaps Jack!
shanoodlep 2 years ago