The Power Delivery Module is an onboard charger for the battery pack, and converts AC (alternating current) power from the EVSE to DC (direct current) to charge the battery pack.

Inverter & Controller

The inverter modifies power coming from the batteries to be compatible with the motor.

The controller uses a PWM (Pulse Width Modulation) systems that pulses on and off very quickly; the more the current is "on," the more power is delivered to the motor and the faster it will spin.