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I really can not afford the price of a decent size DC Motor Contorller for the Chevelle, so I have been experiementing
with some different ideas that I have had.
Resistance Controller
| Latest Chevelle Controller, 2000 Amp Resistance |
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| Very good Control & Discharges Batteries Equally |
This is the Controller that I currently use. These are
the batteries I currently use. Voltage is 48V and I can go around town a few miles pulling my Electric Boat. The 3 contactors
to the left of threaded rods control the speed and voltage. The first contactor pulls and all the rods are in series with
the motor dropping the voltage to 16 volts, a nice slow speed for backing and going slow. Of course, when I first turn the
key on, 6 Volts is applied to the motor to keep pressure in the Power Glide and very slow speed. This is exactly like idling
in an internal combustion engine. Then when the 2nd contactor is pulled, the voltage goes to about 30 volts and a higher speed,
then the 3rd contactor is pulled and full battery goes to the motor for full speed. This is all connected to the gas pedal
and you can go as slow or as fast as you want. When the 2nd contactor is pulled, the first one Does Not go off, and when the
3rd one pulls for full battery, the 1st and 2nd contactors do not go off. I found this much simpler that trying to make one
fall off as the next one pulls. This controller came about when I reversed engineered an EZ-GO golf cart controller.
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A brief description of how this controller is used when making a 1/8
mile run or just accellerating from a stop light.
The runs went like this, turn the key
on and 6V is applied to the motor, press the pedal lightly and 12V is applied to the motor. These batteries are used to get
to the staging lights. Once staged, I hold the brake and the motor is pulling 300 amps while 6V is applied. Once I see the
first yellow light, I press the pedal and apply 12V to the motor, pulling 600 to 800 amps. When I see the last yellow light
before the green light, I floor it and the 12V contactor releases and the 48V contactor pulls and away I go. This is if I
have the Voltage Selector in the 48V mode. As soon as the amps drop back, a couple of seconds, I move the Voltage Selector
to the 72V mode and a little tire squeal is heard and the speed picks up. Then I press the Field Weakening button on the dash
with my finger and the speed picks up more. Then I shift to drive and more acceleration, and then the Field Weakening button
on the dash to the end of the run.
The Salt Water Imersion Controller
CAUTION! THIS CONTROLLER COULD PRODUCE HARMFUL
GASSES!
| Gas Pedal Released, Minimum Plate Exposure |
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| Small Steel Cable runs from Gas Pedal to top of Controller. Raises&lowers Insulators between plates |
| 1000 Amp SWIC (Salt Water Imersion Controller) |
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| This Picture is with Gas Pedal Fully Depressed and Maximum Plate Exposure |
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