大比功率压电发电机无功功率补偿方法

A Method of Compensating Reactive Power for High-Specific Piezoelectric Power Generator

针对传统引信压电发电机的二极管电容整流滤波电路存在导通角小的不足,提出利用填谷电路进行无功功率补偿的改进方法。结合压电发电机的输出功率小以及引信电路功率瞬时变化大的特点,为了更加有效地利用发电机的能量,建立了改进的储能滤波电路模型,并在电路仿真软件Multisim中对改进电路进行仿真计算。仿真分析结果表明:改进后的电路可提高发电机有功功率的利用率,且可改善供电连续性,增大电路的功率因数。

In order to improve the conducting state of traditional capacitor filter rectifiers in fuse piezoelectric generator, a method was proposed using the valley-filling circuit to compensate the original fall of the active power output. Taking both the small output power of piezoelectric generator and the large instantaneous power change of fuse circuit into account, a novel model of energy storage filter circuit was established to more effectively use the energy. The circuit was simulated and calculated by Multisim simulation software. Simulation result shows that the circuit can improve the active power usage of the generator, increase both the continuity of power supply and the power factor of the circuit.