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Old 12-22-2013, 09:20 AM   #1
whizzo
Not Yet Wild
E-Z-GO
 
Join Date: Dec 2013
Location: Brisbane Australia
Posts: 46
Default curtis controller repair and modification

I've got this curtis controller that has blown FETs.
I read feromit's page on the matter.
I've got a copy of otmar ebenhoech's circuit diagrame and the relevent user/ installation manuals.

This is a long case 1205-44 and its to run on a 36 volt ezego electric truck.

I feel fairly confident that the IRF540N is a reasonable substitute for the original FETs & I have a supply of them.

ALL the FETS seem to be blown and a handfull of the gate resistors burnt.

I will be replacing all the FETs and the gate resistors

What I am considering is adding a few extra FETs or may be a lot, mostly for the sake of extra current carrying capacity, more for reliability than anythig else.

what I am interested to find out is the other implications of adding FETs and how this may effect the current limiting, spud braking and other stuff.


I understand the current limit operates on the voltage drop across the FETs. I imagine that added FETS the current limit would just increase proportionally and the protection of the output stage would remain more or less the same in proportion.

Is it considered wise to have the controller, current limit to protect the motor?

All thaughts and information gratefully accepted.

cheers
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