The basic specifications of magnetic flux modulation gear

Magnetic flux modulation gear was proposed in 2001, and many researchers have reported its transmission torque density which has increased dramatically compared to conventional magnetic transmissions. It has some unique characteristics not found in mechanical transmissions such as greaseless drive, high efficiency, quiet drive, low backlash, step-out torque and so on. Therefore, it has potential not only to replace existing mechanical gears but to create new value. For example, it is expected to save maintenance time, improve the working environment (factory or office) by making it quieter, increase efficiency of speed up gears for generators. However, only a few studies about detailed transmission characteristics have been reported. Therefore, authors made a prototype and measured the driving efficiency, loss characteristics, backlash, torsional stiffness, and sound pressure level. In this paper, we report the experimental results and suggest potential used for new applications.