Nonlinear Dynamics and Power Generation on a New Bistable Piezoelectric-Electromagnetic Energy Harvester

Table 2

Comparison of the power generation efficiency of the structure A, the structure B, and the structure C is given when the external excitation amplitude is studied.

Magnetic distance (mm)	Structure	(V)
—	A	12.281	—
15	B	15.096	6.2
	C	15.246
14	B	15.065	8.29
	C	15.217
13	B	13.426	1.72
	C	13.451

A is the conventional monostable piezoelectric cantilever beam; B indicates the bistable piezoelectric cantilever beam with the spring and the magnet; C indicates the bistable piezoelectric cantilever beam with the spring, the magnet, and the coil. indicates the maximum output voltage; indicates the average growth rate of the output voltage.