A drive system including a motor that includes stator coils and a rotor having permanent magnets, a battery that supplies electric power to the stator coils of the motor, an engine that rotates a drive shaft connected to the rotor to generate a driving force of a vehicle, a generator that generates electric power by using exhaust of the engine, and a control part that controls a power source of the electric power to be supplied to the stator coils, wherein the electric power generated by the generator is supplied to the stator coils when an operating state of the engine satisfies a predetermined condition.