Output: 0 - 5K ohm. The standard controller throttle input is 05kO.Curtis potboxes (PB-5, -6/8, -9, -10) are designed to match this input. Some of these potboxes have a built-in. Microswitch, eliminating the need to install a separate pedal-actuated. Curtis also offers a self-contained foot pedal unit (FP-2) that eliminates the need for fabricating and installing a pedal-potbox linkage. Any potbox that provides a nominal 05kO output (controller output begins at 300 ohms, full output is 4400 ohms) will work with the standard throttle input.
The pot box must be mounted so as to allow connection between the potbox lever arm and the vehicle accelerator linkage. The mounting dimensions are shown in Figure 3. The lever arm provides a series of holes so that the accelerator pedal throw can be converted into the correct amount of potentiometer rotation. Use of a second return spring on the pedal, in addition to the potbox return spring, is required to prevent an uncontrollable full-on throttle input (which could happen if there was a single spring, and it broke).
If the self-contained potbox spring is insufficient to return the pedal by itself, two additional pedal return springs must be used. It is also required that the accelerator pedal hit a mechanical stop at its full-on position just before (1 mm [1/32"1/16"]) the potbox lever hits its own full-on stop.
This mechanical stop will prevent the potbox lever arm from bending if undue force is put on the pedal. Protection of the potbox from water and dirt will help avoid problems of corrosion and electrical leakage. After the potbox has been mounted, operation of the pot can be tested by measuring the resistance between the two wires with an ohmmeter. With the pedal not applied, the resistance should be less than 50 ohms. As the pedal is applied, the resistance should rise smoothly until it reaches a value between 4500 and 5500 ohms.
Values below 4500 ohms may cause a reduction in efficiency and top speed. Values above 7000 ohms indicate a defective potbox, and will cause controller shutdown. The item "Curtis 3 Wire PB-2 Pot Box Throttle EV Controller Component" is in sale since Thursday, July 9, 2020. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Other Vehicle Electronics". The seller is "otocarparts12" and is located in Acciarella.This item can be shipped worldwide.