Author Topic: resistive load  (Read 1342 times)

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Coxy

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resistive load
« on: June 20, 2017, 06:33:19 PM »
Hi, need a little help.  I have a Gurd controller and have on hand 8 X 1ohm 100watt cheap metal clad resistore I wish to use for now.  Staying within the limits of this controller using the two fets what would be my best setup. 
THX Coxy

Coxy

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Re: resistive load
« Reply #1 on: June 20, 2017, 08:45:49 PM »
Forgot to mention it is for 12V

ghurd

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Re: resistive load
« Reply #2 on: June 21, 2017, 04:55:06 PM »
Not the best choice of resistors. Personally I don't like that style.

Make 2 banks of 4 resistors in series, for 4 Ohm's total per bank.
That will be about 3.6 A per bank (52w total per bank).
Then use one mosfet per bank. And keep the heat sinks separate. No need for a heat sink, because 3.6A won't get the get hot.

Keep the MOSFETs tabs isolated from anything electrical.
G-
www.ghurd.info<<<-----Information on my Controller

Coxy

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Re: resistive load
« Reply #3 on: June 21, 2017, 05:09:32 PM »
THX Gurd for your info.  I will get a better dump load for the second circuit that I got from you ;D