View Single Post
  #9   Spotlight this post!  
Unread 14-01-2012, 10:57
Ether's Avatar
Ether Ether is offline
systems engineer (retired)
no team
 
Join Date: Nov 2009
Rookie Year: 1969
Location: US
Posts: 8,101
Ether has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond reputeEther has a reputation beyond repute
Re: Optimizing Speed Controllers


Quote:
Originally Posted by flameout View Post
the %Vbus mode changes the duty cycle as a function of the Jaguar's input voltage so as to produce an output that simulates the specified voltage. The formula is as follows:

Code:
duty cycle = Target voltage
              Input voltage
Assuming that by "Input voltage" you meant Vbus voltage, then I believe that what you have described above is the voltage mode, not the %Vbus mode. Someone please correct me if I'm wrong.

The %Vbus mode simply takes the command and interprets it as a % PWM.

Quote:
With brushed DC motors (I'm sure there are other motor types as well, but BLDC motors are all that FRC teams need to be concerned with)
"BLDC" is an acronym for brushless DC.