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Discussion Starter #1
On 8 Sep 2007 at 17:43, Lee Hart wrote:

> For the classic buck converter used for PWM EV controllers, the way to
> parallel them is to use a separate inductor for each controller, and ten run
> them *out* of phase so their on-times do *not* overlap.

I vaguely recall someone about 10 years ago who used 2 Curtis controllers in
an EV. If memory serves, he split both the field and the armature, driving
half of each with each controller. That is, he modified the motor so it
had two sets of terminals.

The principle (as I understand it, and note that I am >not< an engineer) is
similar. The inductance of the motor would smooth out the chopped waveform
so that the phase difference between the controllers wouldn't matter.

David Roden - Akron, Ohio, USA
EVDL Administrator

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