My project team is working on a peddle powered 12 V Battery charger. Power is generated from a low rpm alternator. At this point I am leaning to using analog 3-ph rectification W/Cap but since it will be a constantly variable output this will be a bit tricky. I was wondering if anyone has any advice for using an arduino for PWM of a controlled rectifier/regulator maintaining out put voltages between 13.5-14.5 V. the output curves of the alternator is posted below. We estimate Rpms to range mostly between 500-1000 via a belt system, but may may fluctuate up or down depending on the peddlers enthusiasm/exhaustion level.
A few of my classmates built a hand held I-V curve tracer for PV panels using an arduino and I have been itching for an excuse to use one one in a project. Mind you this will be my first attempt at using any micro-controller but I am excited to get the chance to learn how. Any advice would be helpfull. Thanks