[UK-CONTEST] Portable Generators....

[Steve Thompson]

Basic gennys derive their field supply crudely from the output, 
expecting a resistive(ish) load such as lighting or motors. A big 
capacitor input PSU gulps hefty spikes of current just when the 
field can't support it so the output croaks.

If you modify the field to run from a dc supply, with feedback to 
keep the output volts constant (average over a few cycles) the 
performance is transformed.

Steve


GM3WOJ:
> Hi Bob et al
> 
> Just my 50p worth of comments on this interesting topic. I have a 
> conventional 2.6kVA pertrol generator, with only a crude 'mechanical 
> feedback' system of regulation on the Briggs and Stratton engine. It works 
> well, but is only capable of powering a single radio and valve amp to about 
> 500W o/p.