MaxHeadRoom
- Joined Jul 18, 2013
- 28,618
PicMicro recommend a starting point of around 4Khz to avoid motor noise, buzz.
Max.
Max.
Most likely I'd put up with a bit of vibration in preference to an annoying whine.PicMicro recommend a starting point of around 4Khz to avoid motor noise, buzz.
Max.
The picture posted by the TS looks pretty much like a brushes motor that you might find in any number of toys - come to think of it, same kind of motor died in the last shaver I had pack up.I still am curious how a BLDC motor is going to be controlled by two power leads?
The last PWM controller I put together ran around 4.5Khz for a 2Hp Treadmill motor.
Many commercial drive operate around 20Khz switching freq., induction motor VFD's for e.g.
Max.
IWHT: the control range would be pretty limited.Except the small BLDC motors you buy off ebay that has two leads has an internal commutation circuit/system and 3 stator winding, as is customary for BLDC.
Similar to PC DC fans now.
Max.
Not sure by pretty limited, these are the commercial BLDC drive I use and they use a switching frequency of around 20khz, IRC. (They can also be configured for DC brushed).IWHT: the control range would be pretty limited.
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Aaron Carman