Equivalent Circuit for the Trans-Rotary Magnetic Gear

This letter proposes an equivalent circuit for the trans-rotary magnetic gear. The circuit is presented for both impedance and admittance analogies. In both analogies, the gearing effect is modeled by a transformer. The gear's compliance is modeled by a parallel capacitor in the impedance analogy and by a series inductor in the admittance analogy. As an example, the proposed equivalent circuit is coupled to the equivalent circuit of a backpack energy-harvesting system to create an all-electric equivalent for the energy-harvesting system. The resulting all-electric equivalent circuit provides insight into system dynamics and control strategies. Moreover, the proposed circuit can be readily extended to other types of magnetic gears.