The generator is a three-phase alternator, and the coil is a standard star connection. The power generation efficiency is high and the magnetic resistance is low. It is a permanent magnet alternator, and the output is three-phase alternating current and needs to be rectified to become direct current. This generator is an outer rotor. The motor has a diameter of 62 mm and a thickness of 35 mm. The extension shaft is 8MM, round and 28MM in length. The fitting hole is 4.5MM and the center distance is 51 * 51MM. The power is about 30w. Weight 400G. Wind power and hand crank emergency power generation are good choices. Internal structure of 12-pole three-phase star winding. Measured with a 12V 100W resistive light source, the single-phase current is 2.9A, which is small in size but high in efficiency. After four series of power generation series rectification and variable speed, as long as there is 380 rpm, there will be 90V voltage. Up to 26 volts after three-phase rectification Package: 1pcs* Three-phase AC Permanent Magnet Wind Generator Hand Generator DIY Homemade