Research of rotating piezoelectric energy harvester for automotive motion

This paper proposes a rotating piezoelectric energy harvester for automotive motion (PEH). A mechanical tuning method is used to optimize the output performance of the harvester, including changing the tip mass of the piezoelectric cantilever beam and the base mass. The motion state and natural frequency were analyzed by simulation. An electromechanical coupling model was established through Hamilton's principle and Bernoulli beam theory to theoretically analyze the movement state of the PEH. The power generation performance of PEH under different environmental excitations was tested by experimental methods, and the effect of self-excited vibration on its power generation performance was investigated to test the output variation of the system under different speed changes. Experiments show that when the pulse frequency of the stepper motor is 1700Hz, the tip mass of the piezoelectric cantilever beam is 5.6g, the rotation angle of the support is 0 degrees, the counterweight of the base is 31.6g, and the resistance is 1k omega, respectively, the harvester output power can reach 6.25 mW. Finally, Finally, the future development of harvester is discussed.

Automated summary

This paper presents a rotating piezoelectric energy harvester (PEH) designed for automotive motion. The output performance of the harvester is optimized through a mechanical tuning method, which involves changing the tip mass of the piezoelectric cantilever beam and the base mass. The motion state and natural frequency are analyzed through simulation, and an electromechanical coupling model is established to theoretically analyze the movement state of the PEH. Experimental tests are conducted to evaluate the power generation performance of the PEH under different environmental excitations, and the impact of self-excited vibration on its power generation performance is investigated. The experiments show that the harvester can achieve an output power of 6.25 mW under specific operating conditions.