Was just wondering what you guys though of like making a coil of say 12awg wire and sliding it down a pvc pipe and flow some water through it for a sort of water cooled low ohmic test resistor. I understand the temperature vs resistance stability will suck but I have a current meter that I can just test my PWM to see if it will handle near full rated current.
Only need to test to like 50,000 - 100,000 watts for a couple seconds.
I don't have the motor to try it with yet and don't really want to order it till I know I can drive it. I need to know if my driver chip can still make a decent square wave as the parallel mosfet current ramps up.
All I have now is a 250W 1ohm resistor I been using. Handles 1000watts for 5 seconds. I could water cool that and maybe do a quick 10,000 watt 1 second burst but I don't think that would be an adequate test.
SO is this idea crazy or no?
BTW I'm full of crazy ideas. Because I built a 3 pole variable timing electric motor just for fun:
Only need to test to like 50,000 - 100,000 watts for a couple seconds.
I don't have the motor to try it with yet and don't really want to order it till I know I can drive it. I need to know if my driver chip can still make a decent square wave as the parallel mosfet current ramps up.
All I have now is a 250W 1ohm resistor I been using. Handles 1000watts for 5 seconds. I could water cool that and maybe do a quick 10,000 watt 1 second burst but I don't think that would be an adequate test.
SO is this idea crazy or no?
BTW I'm full of crazy ideas. Because I built a 3 pole variable timing electric motor just for fun: