Re: (ET) Deck Motor Alternate Use

["David Roden" <etpost drmm net>]

On 7 Oct 2013 at 16:31, Robert Troll wrote:

> Only issue is i cannot seem to find any DC Motor controllers that
> output around 40v. 

A typical scooter controller will be for 14 to 48 volts and 250-400 watts, 
or ~1/4 to 1/3hp.  These are imported by the hundreds of thousands from 
Taiwan and China, and are available at scooter parts vendors.  You can get 
plenty of cut-price direct import junk on Ebay too, but quality can be 
iffy.

If that's not enough power, most golf car controllers are designed for 36 
to 
48 volts at 100-300 amps, roughly 3.5 - 14.5hp (allowing for efficiency).  
Curtis and Alltrax are a couple of brands.

One caution though, golf car controllers are usually meant for series 
motors.  The lower inductance of a PM motor may confuse their current 
limiting circuits.  This isn't likely to cause you a problem if you 
oversize 
the controller.

The 4qd folks have beautifully designed PM motor controllers:

http://www.4qd.co.uk/

When last I looked, they had controllers for 35 to 240 amps.  At 40v, 
that's 
roughly 1.4 to 9.6 hp.  

4qd list US distributors on their website.


David Roden - Akron, Ohio, USA

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