Bill Fagal
Stunt Coordinator
- Joined
- Jul 8, 2002
- Messages
- 166
"He that tooteth not his own horn, the same shall not be tooted." --John L. Lewis
In case anyone still has any doubts...I was right!
I just came across United States patent application #20030133587 by Hyre, David E., and Wiggins, Daniel C. It's an interesting read--check it out!
From their disclosure, here is a pic of the heart of the matter--twin gaps with a VC hung between them!
**As I'd suspected, there's also mention of a 3-gap permutation. (Can you say CES 2004 mystery monster driver motor? You heard it here first!! )**
If you got enough magnet/pole cross-section, four gaps aren't out of the question.
The only thing they show that I didn't figure into my model is the channel they cut in the pole piece...which actually doesn't make a lot of sense to me. Without faraday shielding, that extra channel seems like it would cause Le to vary quite a bit with excursion, and it also looks like it robs the VC of some heat sinking.
Dan, what was the thinking on this? (If you're ready to share yet, that is!) Or do production XBL2 motors look more like my model and skip the pole channel?
Bill
In case anyone still has any doubts...I was right!
I just came across United States patent application #20030133587 by Hyre, David E., and Wiggins, Daniel C. It's an interesting read--check it out!
From their disclosure, here is a pic of the heart of the matter--twin gaps with a VC hung between them!
**As I'd suspected, there's also mention of a 3-gap permutation. (Can you say CES 2004 mystery monster driver motor? You heard it here first!! )**
If you got enough magnet/pole cross-section, four gaps aren't out of the question.
The only thing they show that I didn't figure into my model is the channel they cut in the pole piece...which actually doesn't make a lot of sense to me. Without faraday shielding, that extra channel seems like it would cause Le to vary quite a bit with excursion, and it also looks like it robs the VC of some heat sinking.
Dan, what was the thinking on this? (If you're ready to share yet, that is!) Or do production XBL2 motors look more like my model and skip the pole channel?
Bill