Thread: Victor Burnouts
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Unread 24-05-2005, 14:23
BrianBSL BrianBSL is offline
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Re: dummy load / test load for Victor speed controller

Quote:
Originally Posted by WizardOfAz
We'd like to build a test setup for the Victors. Anybody have a suggestion for a cheap fixed resistance dummy load? I don't want to use a motor because the motor is not fixed resistance and it's hard to measure motor power output. Would like to have the ability to set the resistance to about 0.32 ohms to get a 40 A max current test, and also to something like 2.5 ohms for a 5 A max current test. Would like to use a fixed resistor that would spread the heat dissapation over a large area so it doesn't get dangerously hot (500+ watts for the 40 A test).

I can put a big resistor in a can of oil like we do in RF power testing. Anybody got a better idea?

Bill
For discharging our Prius battery packs for our electric airplane project, we use 6 electric water heater elements in a trashcan full of water. Unfortunately, I think their resistance is somewhere around 10-15 ohms, which wouldn't be very doable to achieve .32 ohms.