Study of multiple magnetic vibrating fins with a piezoelectric actuator

An innovative cooling technology, multiple magnetic vibrating fins system with only one piezoelectric actuator, is investigated for the thermal management in this study. The vibrating driving force is generated by a piezoelectric actuator and then transfer to multiple magnetic fins by the magnetic forces. The multiple magnetic vibrating fins system in this study uses only one piezoelectric actuator to drive ten fins to vibrate simultaneously which means that it not only decrease the cost but also distinctly increase the application value. In this study, the resonance frequency and the vibration amplitude of the multiple magnetic vibrating fins is investigated to optimize its thermal performance. Compare to traditional fixed fins, the experiment results show that the improved thermal performance of the vibrating fins cooling system (η) can be improved up to 34.7%, 38.5%, 37.4% and 25.9% under the pitch of vibrating fins of 6 mm, 8 mm, 10 mm, and 12 mm, respectively, with the power consumption of 0.2 W.