基于单片机PWM的交流电压可控补偿器

摘要

消除电源电压波动对动力、照明等用电系统的不良影响以及对电加热炉、大规模照明系统等进行功率闭环时序控制等,均需进行电压调节.因此,研究实现大功率、高可靠性、高动态性能、低谐波、低成本、无级调压技术具有非常重要的意义.补偿式调压技术在市电电压上叠加同、反相位的正弦波补偿电压可实现电压幅值的正负调节.此处基于单片机的PWM功能,设计了一种EPWM斩波补偿式调压装置.实验结果表明该装置具有动态性能高、谐波含量低、成本低等特点,具有很高的应用价值.%In order to eliminate the adverse effects of voltage fluctuations on electric drive system,lighting and other electrical system,and control the electric heater system,large-scale lighting systems etc,all require regulating the voltage.Therefore, it's very important to achieve the technology of the large power,high reliability,high dynamic performance, low harmonics, low cost and no-class regulator.To plus same-phase or anti-phase sine wave compensate voltage on power supply can achieve positive and negative regulation.Based on the PWM function of single chip microcomputer, a chopper compensate EPWM device is designed.The experiments show that this device has the feature of dynamic structure,high performance,low harmonic content and so on,so it has great value in applications.