Thread: Sensorless back_emf speed controller
View Single Post
  #9   Spotlight this post!  
Unread 01-05-2009, 00:00
Jetweb Jetweb is offline
is good at making robots find walls
AKA: Jonathan
FRC #0179 (Children of the Swamp!!!)
Team Role: Mentor
  
Join Date: Jan 2008
Rookie Year: 2007
Location: Jupiter, FL
Posts: 213
Jetweb is a name known to allJetweb is a name known to allJetweb is a name known to allJetweb is a name known to allJetweb is a name known to allJetweb is a name known to all
Re: Sensorless back_emf speed controller
Quote:
Originally Posted by Gdeaver View Post
I'm not shore the purpose behind this project. Any team can close the loop with the C-Rio and an encoder. The current rules allow current sensors. Labview has several included VI to implement speed control and with some programming a motion controller can be formed. I don't see were reading the back EMF can be of use. Isn't the measurement of Back EMF most usefull in ECM brushless motors? Going forward everything is inside the Jag to transform it into a motion controller. It's up to luminary micros to implement the firm ware, First to permit it and NI-WPI to handle the c-rio side. This was a big year with everything being new. Give them some time and the jags will probably morph into a great new toy. And when they do it the the jag will be a real bargain of a motion controller at 85$
To put it simply, its just cool...

It would also be extremely convenient to be able to monitor motor position or speed WITHOUT the encoder.

The jag has a current sensor, but when it comes to trying to monitor position or speed with this you really cant, you can control torque with the addition of an encoder, but we don't want those now do we.