Perm PMG 132 Reverse Brush Configuration - Brush "timing"

[grindz145]

So I have this gorgeous Perm PMG 132 courtesy of Methods. However my design has changed a bit, and I'd really like to use this motor on a left hand drive bike. Since the motor is designed to be a clockwise turning motor, this isn't going to work as is.

So my question is: What exactly determines the directionality of these motors, and how can I reverse it? Would it be possible to simply swap out the brush-holders from a motor of an opposite timed motor? Or is there something else going on?

Thanks!
-Troy

 

[grindz145]

P.S. It actually looks like there isn't an opposite version of this motor, so brusholder swapping doesn't look like an option... Any input would be sweet.

 

[Thud]

Jack shaft it to whatever side your running to.
I have one of these also, & am making grand plans. Let me know what your putting yours into & I can offer ideas & drawings for your fabricator.

Personaly, I am going 2-speed all the way. 35 in low-70 in high.

 

[Jozzer]

Not much you can do to turn things around I'm afraid. Daft design..
They can be run at lower power/voltage in reverse, but it doesn't make much sense to give the motor a hard time.

Maybe sell it and get an Agni instead?

Jozz

 

[grindz145]

Thanks for the feedback guys. I've been drawing up a jackshaft myself, but it seems such a shame to waste the power just to convert the drive side.

However, if I can get a 2 speed transmission out of it, now it's worth it!

I'd love to see what you have in mind Thud? I was just going to do something simple, couple of bearings and a 20 tooth sprocket on either side. I don't even need the reduction...

 

[Thud]

here is a pdf of the drawing.
.75" shafts to handle the tourqe I bumped the chain size from #40 to #35 to save space & i am pretty sure its tough enough for the perm.

the box housing all the stuff is 3.25"w x 6"l x 4"h
View attachment #35 2-speed.pdf

 

[grindz145]

Sweet! So is it sequential then? How does it shift? You'll have to excuse how completely mechanically inept I am.

Any chance you plan to build a couple?

 

[JEB]

I went from #35 to #40 chain because no rollers on #35, hard to keep the chain lubed without slinging off.