GMP232/x
可编程逻辑器件CPLD以其可靠性、小功耗和保密性强等特点及其连续式的内部结构、得到了突飞猛进的发展和广泛的应用，用其取代传统的线路有不可比拟的优点、集成度高、分立元件少、靠干扰能力强；）线路设计简单方便，用软件设计、可修改性强；使用晶振频率高、易于和高速度的处理器（如DSP）连接、实现高频控制系统。 另一方面、在单元串联变频器中、由于采用多单元串联的方式、输出高压、单元的串联（多重化）即使得可改善输出波形成为可能。同时也带来了如何分配各功率单元输出功率的问题。目前通用的载波垂直移相PWM调制和载波水平移相PWM调制技术均需要控制系统输出多路移相SPWM波形，控制主回路器件，形成完美的正弦波输出。 为单元串联式变频器中功率单元主电路图。 其为一个三相输入、单相输出的交-直-交电压源型逆变器。为6单元串联的主回路拓扑。 功砝元功弈元局瑜：硕士研究生6单元串联的主回路拓扑基金资助：陕西省教育厅产业化培育项目这样，所示的变频器可理解成为一个合成的：a.《变频器与软启动器应用200例》您的论文得到两院院士关注单元串联变频器中多路SPWM的CPLD实现生成方法。详细的论述了SPWM波生成机理和试验系统硬件结构。为调制度a =1时的A相输出相电压波形。所示为调制度3=1时的A相输出相电压频谱图。所示为调制度d=0.5时的A相输出线电压波形。所示为调制度3=0.5时的A相输出线电压频谱图。所示为调制度3=0.1时的A相输出线电压波形。所示为调制度3=0.1时的A相输出线电压频谱图。 GMP232/x
GMP232/x
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