Tha fios agaibh
- Aug 11, 2014
- 2,252
- Joined
- Aug 11, 2014
- Messages
- 2,252
I have several 3phase 36volt battery chargers (fork lift battery) with bad control boards. Replacement of these obsolete boards are hard to find and near the cost of replacing the entire charger.
I was wondering if it's feasible to design a simple circuit that could drive the 3 internal scrs to replicate the 40vdc output originally derived by the control board. I assume I would need to trigger the scr gates with pwm at 120deg apart from each other. I am not concerned at this point about a complete charging circuit but more the fundamentals of how the driver section works.
Unfortunately, I have no schematic to work from. I'm hoping to get some ideas here.
I was wondering if it's feasible to design a simple circuit that could drive the 3 internal scrs to replicate the 40vdc output originally derived by the control board. I assume I would need to trigger the scr gates with pwm at 120deg apart from each other. I am not concerned at this point about a complete charging circuit but more the fundamentals of how the driver section works.
Unfortunately, I have no schematic to work from. I'm hoping to get some ideas here.