This is not a perpetual motion proposal, on the contrary, is a machine that wears out of parts and has energy loses but like a car, it can be highly effecient due to a scheduled service plan.
An alternator which has a hand lever to jump start it. The electric power generated by the alternator powers an electric motor which has a VSD (variable speed drive) connected to it. The machanical power generated by the motor is then delivered back to the alternator via a manual gearbox.
Imagine, a bicycle. Replace the paddles with a motor which has a VSD, and the back wheel with a generator with gears on it. At first, the motor drives the alternator with with a small gear at a normal speed/frequency. Then gradually increase the gear until you reach the largest gear at the same time increasing the speed/frequency of the motor. Gears=power. Frequency/speed=torque.
Will it produce surplus power?