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In this paper, an electromagnetic (EM) vibration energy harvester (VEH) employing the Halbach arrays magnetic circuits to convert low-frequency vibration energy into electrical energy is presented. The VEH is made up of the Halbach arrays magnetic circuits, a coil and a cantilever beam. The Halbach arrays magnetic circuits can concentrate the magnetic field on one side while cancelling out the magnetic field on the other side. An analytical model is developed to analyze the distribution of magnetic field of the Halbach arrays magnetic circuits. The electric output performances of the VEH have been investigated. Compared to traditional EM VEH, the proposed VEH can significantly increase output power and power density. When coil diameter d, turns number N and cantilever length L c is 20 mm, 1400 and 80 mm, we obtain the optimum output power of 90.35 mW and power density of 0.55 mW/cm 3 at 12.65 Hz under 0.5 g, respectively. Remarkably, the proposed low-frequency resonant EM VEH employing the Halbach arrays has great potential for applying in intelligent wireless sensor networks (WSNs).Index Terms-electromagnetic coupling, vibration energy harvesting, coil, magnet circuits 0018-9464 (c)

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