The present invention is an electric vehicle power system that uses
multiple permanent magnet motor/generators connected in series or
parallel and multiple battery step switching. Motor, torque and speed are
controlled by steps in series connection and then in parallel connection.
Smooth acceleration, regeneration and current control are provided by
delaying stepping from one battery step to the next until the next step
is fully engaged. Transients are limited to the effect of one battery
step by using rectifier shunt switching. Multiple motors provide
acceleration torque at low speed in series connections and at cruising
speeds in parallel connection. Regenerative deceleration is provided in
the opposite manner. Battery depletion is averaged by flipping ends of a
battery bank. Controls are provided with normal foot controls and a speed
setter. A separate deceleration pedal or lever may be used.