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Curtis speed control, non regen, "precharge resistor&qu

Curtis speed control, non regen, "precharge resistor&qu

Postby hfitzwater » Tue Apr 18, 2006 7:55 pm

Does anyone know what the value of the "optional Precharge resistor" which is shown on the Curtis schematics for the 1204 & 1205 series controllers. It allows a small current to bleed into the controller and thus, I presume, eliminate a slight delay in the pedal reaction when first starting off. I reconfigured my old 36 volt relay controlled cart to 48 volt solid state some time ago and still can't avoid the "jolt" when I start off. I'm assuming that the culprit is the precharge resistor, which I did not install, as I did not know the rating (in watts and ohms) of it. Anybody got a clue? The resistor goes between the battery and the foot pedal potentiometer connectors on the controller.
ClubCar '98- 48V (w/regen) - stock
Nordskog Marketeer (circa '74) - 36V - a custom work in progress
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Postby Bill » Tue Apr 18, 2006 8:35 pm

The precharge resistor "jumps across" the two large terminals of the solenoid/contactor.
I think You are looking at the protection diode that goes in between the battery (before the keyswitch) and the throttle microswitch.

I have one schematic that shows a 250 ohm 5 watt resistor.

All the rest of the info I have is in picture form and not an actual schematic.
Image
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