Re: (ET) Zero Turn Electric Mower Conversion

["David Roden (Akron OH USA)" <etpost drmm net>]

On 4 Nov 2013 at 13:55, Pieter Litchfield wrote:

> I wonder if there isn't an electric forklift or mover controller that
> would do the job? 

4QD make 'em.   You'd need two of their controllers, one for each wheel.  

http://www.4qd.co.uk/prod/index.html

You'd also need a joystick interface.

http://www.4qd.co.uk/accs/jsi.html

Their controllers are mostly designed for PM motors, but could be adapted 
for wound field motors.  The electric brake function on some models could 
be 
used to switch on the fields before applying power to the armatures.

http://www.4qd.co.uk/fea/pb.html

I love 4QD's website.  The design hasn't changed in at least 15 years. 
It's 
all information and no glitz (or Flash), done in simple static html so it 
loads in an instant, even on the slowest internet connection.  It also has 
a 
lot of useful drive system design information.