Richie8Mann
- Nov 19, 2012
- 3
- Joined
- Nov 19, 2012
- Messages
- 3
The project I am building needs to turn 120 volts AC into 100 volts DC while being able to withstand 8 kw of current. I already have a 10 kw bridge rectifier. The 20 volt reduction could happen before the rectifier by using a transformer or after the rectifier using a voltage divider circuit (using two resistors). The problem is, either one of those options is not possible due to cost. Transformers in that power range are extremely expensive and even 1 kw resistors are $70 each at best from what I could find. Does anyone have any other ideas on how to drop those 20 volts? I have plenty of area for this project, so I was even thinking of some thick wire run for a distance or maybe some pieces of graphite from the art store to create a crude voltage divider. I have thought of different cooling methods that would need to be employed using water, oil, or fans. Finally, I was thinking that furnace heating element resistive wire might work in place of resistors in the divider circuit. I think it can handle 220 volts at 800 watts (of course multiple strands would have to be paralleled), but I think that would be better for lowering the amount of current available instead of lowering the voltage.
Thanks in advance for any ideas.
Thanks in advance for any ideas.
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