Parametrically driven variable‐reluctance generator

In the parametrically driven variable‐reluctance generator, the inductance of an iron‐core inductor is varied at an acoustic frequency by an external force. Nonlinear effects thereby absorb mechanical power from the external force and deliver electrical power to a load connected to the inductor, with the electrical phenomena occurring at half the frequency of the mechanical phenomena. Both a theoretical description of this device and measurements in agreement with the theory are presented. Several interesting nonlinear dynamical phenomena can be observed with this simple system; it is also capable of highly efficient power transduction.