GE EV-1 DC motor controller
The EV-1 SCR (silicon controlled resistance) type of controller actually has decent features: including adjustable acceleration (via a potentiometer), automatic motor field weakening (for faster motor speed under light load), and a "wide open" power bypass that effectively connects the batteries directly to the motor when high current is demanded. (Think: turbo!)
It's a reliable controller that was fairly widely used in industry and in some earlier EV conversions.
1987 Suzuki Forsa - 120 volts
1981 Jet Electra Van 600 - 102 volts
1975 Triumph Spitfire - 108 volts
But it's old technology, and one thing I learned from the EVDL is that it isn't ideal for use with a small battery pack (relative to forklift packs weighing several thousand pounds). The explanation is a little over my head, but has to do with the fact that the EV-1 lacks the capa citors that a more modern PWM style controller has. Lacking capacitance, current drawn via the EV-1 tends to be harder on a small pack, leading to lower efficiency (somewhat reduced range and battery life).
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