A Study on the Drive Performance of a Magnetic Planetary Gear Device with Dual-Input Functionality (Part 2)

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  We created and reported the performance of a variety of magnetic gears in previous work. Magnetic gears allow the transmission of motive force in a completely non-contact state. Their main advantages include low vibration and noise, maintenance-free operation, and a lack of lubrication. We have recently constructed a prototype of a magnetic planetary gear apparatus and found that the most promising practical application of such a device, particularly for accelerator versions, is in wind-powered electrical power generating equipment. This device boasts dual-input functionality. We envision wind power as the primary input, while the secondary input may come from sources such as hydraulic power or electrical-storage devices to drive the mechanism that controls the rotation rate. We reported the possibility of using secondary input as a differential mechanism in a previous paper published in this journal to compensate for variations in the input rotation rate, thus allowing the rotation rate of the sun gear to be controlled, which constitutes the output of the device. We used our dual-input device in this research to carry out experimental investigations into a parallel-drive scheme in which the outer ring gear on the secondary input is rotated in the same direction that the carrier is rotated. Our experiments revealed three distinct operating regimes for our device: a regime in which the output rotation rate was lower than the input rotation rate, a point at which the output rotation rate fell to zero, and a regime in which the output rotation rate was greater than, but in the direction opposite to, the input rotation rate.

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