View Single Post
  #14   Spotlight this post!  
Unread 06-07-2007, 21:41
Generalx5's Avatar
Generalx5 Generalx5 is offline
Hard Core Inventor
AKA: Jun(John) Zheng
FRC #1346 (Trobotics)
Team Role: Student
 
Join Date: Nov 2005
Rookie Year: 2004
Location: CANADA
Posts: 94
Generalx5 will become famous soon enough
Re: PWM translates to movement?

oops, in the above I meant to say using 2 diodes in series, not parallel. I guess that would work. In brushless motors, how do they change the current directions in the stator? Im attempting to do essentially the same thing but using H-Bridges because they can handle high currents.

Also, theres something else im not really clear, is that, if a mosfet had already been turned on so that it conducts, and current is then applied at the source after. will the mosfet heat up? From what I've read, its the point when the mosfet conducts (rise/fall) when current is present at the source that heats up the mosfet. But say it the current wasnt there when it conducts, will that heat up the mosfet? The other thing is, will it even work if there is no current present at the source terminal?

Anyone know a good PWM chip I can use directly without programing, like the PWM IC chip in the Victors. Also, I've noticed that the MOS Drivers only require 2 miliamps for their source I believe any higher would damage them, so I am wondering how I can get that sort of current if I connect it directly to the high current power supply(without the use of a seperate power supply, like our victors).

Last edited by Generalx5 : 07-07-2007 at 21:30. Reason: added last paragraph..