Hi All,
You have all been really helpful before, so before I go into my problem, here is an update of my project (almost 6 minute video) for you... please feel free to browse through my gallery.
I have a 3.5hp lawnmower engine driving a 100A alternator. I have removed the rectifying diodes and replaced them with some external 100A diodes.
I then have two 12v SLA batteries in series which I then apply to the field using PWM. The output from the rectifier goes straight to the motor.
So to drive, you set the power with the engine throttle, and then increase the duty cycle on the field therefore increasing the traction current.
What I'd like to do is use the output from the alternator to also charge the batteries, the problem is, the output goes down to 0v and I don't know what the maximum voltage is (I did get 125V when it wasn't under load). Does anybody have any ideas how I could tackle this? I don't mind having an LED on the control panel to indicate that the batteries aren't being charged.
Any thoughts, comments or suggestions welcome!
Cheers
Shaun
You have all been really helpful before, so before I go into my problem, here is an update of my project (almost 6 minute video) for you... please feel free to browse through my gallery.
I have a 3.5hp lawnmower engine driving a 100A alternator. I have removed the rectifying diodes and replaced them with some external 100A diodes.
I then have two 12v SLA batteries in series which I then apply to the field using PWM. The output from the rectifier goes straight to the motor.
So to drive, you set the power with the engine throttle, and then increase the duty cycle on the field therefore increasing the traction current.
What I'd like to do is use the output from the alternator to also charge the batteries, the problem is, the output goes down to 0v and I don't know what the maximum voltage is (I did get 125V when it wasn't under load). Does anybody have any ideas how I could tackle this? I don't mind having an LED on the control panel to indicate that the batteries aren't being charged.
Any thoughts, comments or suggestions welcome!
Cheers
Shaun