A Free-Standing Electromagnetic Energy Harvester for Condition Monitoring in Smart Grid

Table 1

The parameters of the two cores (μ_r = 2000 and N = 100).

Core type	Rod (a)	I-shaped (b)
Effective permeability	30.15	95.98
Wire resistance (Ω)	2.21	2.21
Open circuit voltage (mVRMS)	4.95	15.76
Output power (μW)	2.77	28.08
Core volume (cm^3)	185.0	617.9
Power density (nW/cm^3)	15.0	45.4