I need some help... I havent used a IGBT before but I think its whats needed for my project, though I am open to other suggestions. First I will explain. I am off grid and like building everything myself. I built a shunt regulator for my windmill consisting of a stack of doides (150 amp ones from junked welding machines) from memory 21 or so in series mounted on aluminium plates.
what happens is this stack starts to conduct at 13 volts dc (maybe 1 amp at this point) but by 15-15.5 volts the stack is fully turned on and sheding power away from my batts...its worked great since 2007... But this took a lot of high powered diodes and I dont know if I can get more for free.
I am building a alternator (otherpower style) to be driven by a engine at 1800rpm.
The alt will be 3 phase and will be rectified to DC. its at this point I would like to find a way to clip peak voltage much as my diode stack did for me with the windmill.
I figured shunt regulation would be the way to go. I would like to have the alt supplying power up to 13.4 volts then have the Igbt clip anything above that, if it could be adjustable that would be even better.
I am open to other and any ideas, and understand using the IGBT as a series pass element may be another way to go.
I was thinking shunt as Its 100 percent efficient up to 13.4 with all power going into my bank up to that point.
Ideas Please...thanks.
what happens is this stack starts to conduct at 13 volts dc (maybe 1 amp at this point) but by 15-15.5 volts the stack is fully turned on and sheding power away from my batts...its worked great since 2007... But this took a lot of high powered diodes and I dont know if I can get more for free.
I am building a alternator (otherpower style) to be driven by a engine at 1800rpm.
The alt will be 3 phase and will be rectified to DC. its at this point I would like to find a way to clip peak voltage much as my diode stack did for me with the windmill.
I figured shunt regulation would be the way to go. I would like to have the alt supplying power up to 13.4 volts then have the Igbt clip anything above that, if it could be adjustable that would be even better.
I am open to other and any ideas, and understand using the IGBT as a series pass element may be another way to go.
I was thinking shunt as Its 100 percent efficient up to 13.4 with all power going into my bank up to that point.
Ideas Please...thanks.