Re: (ET) Controllers and inverters

["David Roden" <etpost drmm net>]

On 31 Dec 2012 at 15:29, Robert Troll wrote:

> And the Curtis 1204 is a PWM controller. I can only assume that the 
> Alltrax is
> as well. 

Does anyone know of any DC motor controllers that aren't pulse width 
modulated?  Other than simple rectactor / contactor /. resistor based 
ones, 
that is.  

Though I'm a layman, I understand reasonably well how a PWM controller 
works.  Can you briefly summarize the principle of operation behind these 
non-PWM controllers?

Thanks.


David Roden - Akron, Ohio, USA

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