Re: (ET) Wood Chipper Conversion

[Christopher Zach <cz alembic crystel com>]

Max Hall wrote:
> A great attribute of the series-wound motors that we use on our ET 
> accessories is that, in general terms: the voltage "makes" the motor go 
> a certain speed, and it draws whatever current it needs to go that 
> speed; the current is proportional to load... right up to the limit of 
> batteries' ability to deliver current.

Just checking: Are you thinking series or shunt motor? The motor on the 
ET itself is shunt; it will do anything to maintain it's speed which is 
what makes it so great for a tractor: It will haul up hills, then regen 
going down to keep the speed constant.

Actually it is a shunt motor with a small series field. This is to keep 
the motor from blowing up if the field windings drop out and to 
strengthen the motor field (adding torque) when you're really loading it 
down.

The snowblower is a series motor with a shunt winding IIRC. More power, 
but it will bog down in heavy ice. Which might be a good thing; you 
don't want it to rip the chain apart trying to keep the speed constant.

Chris