Optimization Results and Comparison
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The previous chapter introduced and classified the considered electromagnetic coupling architectures. Overall boundary conditions for centimeter scale vibration transducers were defined. In order to compare the performance limits of the architectures these boundary conditions are applied to all architectures. Then an optimization approach was formulated to assess the optimal dimensions with respect to the output power and the output voltage. For architectures with a 6–dimensional search space the evolution strategy optimization technique is used. Furthermore the architecture specific calculation of the magnetic flux gradient was discussed. The calculation of architectures without back iron is based on Maxwell’s equations whereas the calculation of architectures with back iron is based on static magnetic 2–dimensional FEA.
KeywordsOutput Power Output Voltage Coil Volume Pole Plate High Oscillation Amplitude