Brushless DC motor - Sinusoidal drive
Brushless DC motor - Sinusoidal drive
(OP)
Hi,
I am a newbie to motor control and would like to find some articles on driving brushless DC motor with sinusoidal voltage. Could someone place point me in the right direction? I will be using hall sensors for position sensing.
Thanks alot.
I am a newbie to motor control and would like to find some articles on driving brushless DC motor with sinusoidal voltage. Could someone place point me in the right direction? I will be using hall sensors for position sensing.
Thanks alot.





RE: Brushless DC motor - Sinusoidal drive
http://www.semicon.toshiba.co.jp/eng/solution/mtele/mot...
http://www.motionshop.com/pr/copley399.shtml
etc. for more info
RE: Brushless DC motor - Sinusoidal drive
For PM motor commutation, one needs position sensor unless it is a (low cost or temperature / external magnetic field sensitive or whatever) sensorless application.
Coarse (60 el.deg resolution) Hall sensors are used to make trapezoidal commutation. For sinusoidal one, you need accurate position sensor like optical encoder or resolver.
This way, Hall sensors basically mean trapezoidal commutation. As you mention them in sinusoidal commutation context, I have to assume that you are talking about start-up (power-up) of sinusoidal drive with incremental encoder. The problem is that absolute position is not available from incremental encoder. Therefore, Hall sensors are used for initial coarse commutation unless absolute zero position is found.
For such an application, Hall sensors may be eliminated by using a kind of phase search procedure (see Smart Initialization article overview at www.drbrushless.com for more info).
RE: Brushless DC motor - Sinusoidal drive
RE: Brushless DC motor - Sinusoidal drive
TDA5144 etc. Sinusoidal voltage is not necessary but
you can approximate it with Pulse Width Modulation.
<nbucska@pcperipherals.com>
RE: Brushless DC motor - Sinusoidal drive
Rather going into details (bit lazy today) go visit here: http://www.motionvillage.com/training/handbook/
Kollmorgen did a good job publishing some info online.
Cameron Anderson - Sales & Applications Engineer
Aerotech, Inc. - www.aerotech.com
"Dedicated to the Science of Motion"