kathmandu
Full Member level 5
Hello,
I want to build a 2kW battery charger for a solar system. I'll use a portable generator as a power source and a step-down/isolation LF transformer (former welding machine) to get around 30VAC.
As the load consists of a big battery bank (48VDC / 500A) I can't use an output voltage control thus I have to use a current control topology.
I was thinking of a regular CCM boost converter driven by a UC3845 chip. But, as the input/output current is quite big I prefer not to use a current sense resistor.
I've never used a current transformer before (hence I don't have one available) but I'm wondering if I could make a separate winding (few turns) around the input toroidal inductor to get a feedback voltage proportional to the inductor current.
I don't mind about output ripple and such, I just need a higher PFC to protect the gas generator.
Do you have any other suggestion?
I want to build a 2kW battery charger for a solar system. I'll use a portable generator as a power source and a step-down/isolation LF transformer (former welding machine) to get around 30VAC.
As the load consists of a big battery bank (48VDC / 500A) I can't use an output voltage control thus I have to use a current control topology.
I was thinking of a regular CCM boost converter driven by a UC3845 chip. But, as the input/output current is quite big I prefer not to use a current sense resistor.
I've never used a current transformer before (hence I don't have one available) but I'm wondering if I could make a separate winding (few turns) around the input toroidal inductor to get a feedback voltage proportional to the inductor current.
I don't mind about output ripple and such, I just need a higher PFC to protect the gas generator.
Do you have any other suggestion?