Features: 1Stable and High Efficiency: Using NdFeB permanent magnets and premium pure copper windings the generator can generate high efficiency and stable power. 2Aluminum Alloy Shell: The three phase AC permanent magnet generator adopts aluminum alloy shell with corrosion proof treatment acid alkali and salt resistance has a longer service life. 3Good Heat Dissipation: This permanent magnet generator has a specially designed rotor which has a small resistance torsion when starting and has a good cooling effect. 4Gearless: Gearless permanent magnet electric motor generator low rotating speed and can be driven directly energy saving safe and reliable. 5Easy Operation: The low speed rare earth permanent magnet generator is very simple to operate and the three phase AC permanent magnet generator is safe easy to maintain. Specification: Item Type: Three Phase AlternatorMaterial: Aluminum AlloyGross Weight: 3950g / 139.3ozRated Power: 200WProduct Size: Approx.15 x 13.5 x 16.5cm / 5.9 x 5.3 x 6.5inRated Speed: 750 RPMStarting Torsion: < 0.1 NmMagnetic Poles Number: level 12Conversion Efficiency: 85%Working Temperature Rise: 70Generator Type: Rare earth permanent magnet 3 phase alternatorMain Shaft Material: carbon steelMagnetic Steel Material: rare earth Ndfeb materialLubrication Mode: add lubricating greaseInsulation Class: H class Package List: 1 x 3 Phase AC Permanent Magnet Generator