BASIC RESEARCH ON A MANPOWER GENERATION SYSTEM

助力自行车的直流无刷电动机被用作三相永磁同步发电机。三相永磁同步发电机由链轮直接驱动，电枢绕组产生的换相电抗对三相交流电压的整流电压影响很大。在本研究中，换流电抗的值可以从实验结果中得到，并就该电抗的影响进行了研究，并制作了配有单片机的瓦特计，用于测量和显示输出电功率。用YEW WT230数字式功率表验证了所制作的功率表的计算精度。对于该人力发电系统的电功率测量，确认100毫秒的采样周期对于实际使用是足够精确的。该发电系统获得128[W] × 60 [s]=7680[J]电能。采用降压型开关稳压器稳定直流输出电压，开关频率在考虑微机处理能力后确定为50μs。

The DC brushless motor of the power-assisted bicycle was used as a 3-phase Permanent Magnet Synchronous Generator. The 3-phase PMSG is driven directly by the chain attached wheel sprocket.The rectified voltage from the 3-phase AC voltage is influenced considerably by the commutation reactance caused by the armature windings. In this research, the value of the commutation reactance can be obtained from the experimental results and regarding the influence of this reactance is investigated.The wattmeter equipped with the one-chip microcomputer was produced to measure and display the output electric power. The calculation accuracy of the produced wattmeter is conformed by YEW WT230 digital wattmeter. For the electric power measurement of this manpower generation system, it was confirmed that 100-millisecond sampling period is accurate enough for practical usage.This generation system obtained 128[W]x60[s]=7680[J] electrical energy. And the improvement of mechanical driving system enables output electric power to increase.The buck-type switching regulator is used to stabilize dc output voltage and the switching frequency will is decided to 50μs after consideration of processing capability of the microcomputer.