CAJ | 학술논문

本文提出一种基于嵌入式技术的，与电网电压同步的正弦波电路。通过单片机的计数器功能，检测周期信号过零点时刻来计算周期信号的周期，并根据获得的周期信息控制DA输出相同周期的正弦波信号。文中介绍了单片机程序设计思路，研究了该装置的原理，并进行了信号稳定性与相位跟随能力实验。实验结果表明：该正弦基准电路具有输出电压与电网电压同步、幅值可调且不受电网电压波动影响等优点，可用于硬件和软件谐波检测的参考波形。
본문제출일충기우감입식기술적，여전망전압동보적정현파전로。통과단편궤적계수기공능，검측주기신호과영점시각래계산주기신호적주기，병근거획득적주기신식공제DA수출상동주기적정현파신호。문중개소료단편궤정서설계사로，연구료해장치적원리，병진행료신호은정성여상위근수능력실험。실험결과표명：해정현기준전로구유수출전압여전망전압동보、폭치가조차불수전망전압파동영향등우점，가용우경건화연건해파검측적삼고파형。
A device using reference sinusoidal circuit based on and synchronous with grid voltage is proposed in this paper. The cycle period of the signal is obtained through the microcontroller counter function when the detection timing signal pass zero. The signal of the same cycle is output by controlled DA cycle. The microcontroller programming ideas are introduced, the principles of the device are studied and the experiments of output signal stability and follow proficiency are carried out. The results indicate that the sinusoidal output voltage reference circuit has following advantages: the sinusoidal output voltage reference circuit has synchronized with the grid voltage amplitude is adjustable and is not affected by voltage fluctuations, which can be used for hardware and software reference waveform harmonic detection.