200 watts 200rpm Low speed Permanent Magnet Generator

A permanent magnet generator is a device that converts mechanical energy to electrical energy. In this device the rotor windings have been replaced with permanent magnets. These devices do not require a separate DC supply for the excitation circuit or do they have slip rings and contact brushes.The low RPM generators will start generating power at around 100 rpm and remain efficient up to about 600 rpm. Their "sweet spot" is often around 400 rpm but it will vary from generator to generator.