BASIC RESEARCH ON A MANPOWER GENERATION SYSTEM

采用助力自行车直流无刷电机作为三相永磁同步发电机。三相PMSG由链轮直接驱动。三相交流电压的整流电压受电枢绕组引起的换相电抗的影响很大。在本研究中，可以从实验结果中得到换相电抗的值，并对该电抗的影响进行了研究。研制了一种装有单片机的功率计，用于测量和显示输出功率。所生产的电能表的计算精度符合yw WT230数字电能表。对于该人力发电系统的电功率测量，证实了100毫秒的采样周期足够精确，可以实际使用。该发电系统获得了128[W]x60[s]=7680[J]的电能。机械传动系统的改进使输出功率增大。采用buck型开关稳压器稳定直流输出电压，考虑到微机的处理能力，决定开关频率为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.