Resistor Choice
Resistor Choice
(OP)
Good Morning,
I am trying to find a resistor that will heat up and stabilize quickly ie within minutes. At the moment I am using an Arcoil resistor which at 10W is taking 3 hours + to get to a stable heat while well insulated.
I want to heat a copper block 50mm x 50mm x 25mm so that I can put a heatsink on the top for testing.
Any advice will be greatly appreciated.
Pete
I am trying to find a resistor that will heat up and stabilize quickly ie within minutes. At the moment I am using an Arcoil resistor which at 10W is taking 3 hours + to get to a stable heat while well insulated.
I want to heat a copper block 50mm x 50mm x 25mm so that I can put a heatsink on the top for testing.
Any advice will be greatly appreciated.
Pete






RE: Resistor Choice
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: Resistor Choice
If you want a steady flow of heat instead of a steady temperature, then use the PID setup and an over voltage to bring the temperature up fast, and then cut the voltage back and bypass the PID controller.
The copper block and resistor combination will have a thermal time constant which may be the factor dictating the warmup time.
Bill
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"Why not the best?"
Jimmy Carter
RE: Resistor Choice
Think low-mass for your resistor. At 10W, though, it'll be hefty. The one you have is a good choice I think.
As Bill mentioned, it's when you add that copper block into the mix that the time constant gets up there.
Solution: many more watts and a good controller to avoid overshoot.
Best to you,
Goober Dave
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RE: Resistor Choice
RE: Resistor Choice
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.