My name is Clement and I'm from Malaysia. I'm currently studying for a diploma for electrical engineering.
For my program, I need to design and make a mini portable genset.
I have bought all the material needed. The basic design is that I have a petrol engine, dc motor, 12v LA battery x2, 24v dc- 230v AC inverter.
The engine shaft is coupled to the dc motor.
The engine is started using the dc motor. Kind of like a jump start
The engine will rotate the dc motor which generates 15V DC (tested)
The problem is that the dc motor is a two way motor, it can be a generator when rotated or a dc motor when connected to a battery. And I don't know how to make the electricity go one way and charge the battery and prevent the electricity from the battery flow to the dc motor and activate it.
Because I have bought a 24v inverter, I need to connect 2 12V battery in series in order for it to function.
Please help solve no.4 problem and please take in consideration for no.5 situation.