为满足管道空间位置与焊接参数相匹配的智能全位置焊接系统的工艺要求,构建了以焊接电源通信模块为从站节点的主从式CAN(Controller Area Network)总线网络控制焊接系统.提出基于PC控制的服务数据对象(ADS)通信方式访问焊接电源对象词典...为满足管道空间位置与焊接参数相匹配的智能全位置焊接系统的工艺要求,构建了以焊接电源通信模块为从站节点的主从式CAN(Controller Area Network)总线网络控制焊接系统.提出基于PC控制的服务数据对象(ADS)通信方式访问焊接电源对象词典,采用过程同步数据对象传输保证了数据传输实时性,同时使用基于视窗技术的组态软件可实现焊接过程的监视和数据的传输,实现了焊接电源CAN-open总线控制在管道全位置焊接系统的计算机集成.实验表明,该系统数据传输快速、稳定,可满足管道全位置焊接工艺要求.展开更多
Pulse width modulation （ PWM） drive control digitalization is the key for the full digital invert power supply. New ideas are proposed, which are based on field programmable gate array （ FPGA ）. First, digital PWM...Pulse width modulation （ PWM） drive control digitalization is the key for the full digital invert power supply. New ideas are proposed, which are based on field programmable gate array （ FPGA ）. First, digital PWM principles are discussed. The primary and secondary current characteristics are analyzed when the transformer is in both normal and magnetic bias conditions. Second, two digitalization methods are put forward after the research on PWM adjustment principles, which are based on the primary current feedback. Though the two methods could restrain magnetic bias, their realization is difficult. A new method is researched on double close-loops to overcome the above shortcomings, which uses the secondary current as the feedback signal and the primary current as the protection signal. Finally, the secondary current control made is discussed and realized. Welding experimental results show that the method has strong flexibility and adaptability, which can be used to realize the full digital welding power supply.展开更多
文摘为满足管道空间位置与焊接参数相匹配的智能全位置焊接系统的工艺要求,构建了以焊接电源通信模块为从站节点的主从式CAN(Controller Area Network)总线网络控制焊接系统.提出基于PC控制的服务数据对象(ADS)通信方式访问焊接电源对象词典,采用过程同步数据对象传输保证了数据传输实时性,同时使用基于视窗技术的组态软件可实现焊接过程的监视和数据的传输,实现了焊接电源CAN-open总线控制在管道全位置焊接系统的计算机集成.实验表明,该系统数据传输快速、稳定,可满足管道全位置焊接工艺要求.
文摘Pulse width modulation （ PWM） drive control digitalization is the key for the full digital invert power supply. New ideas are proposed, which are based on field programmable gate array （ FPGA ）. First, digital PWM principles are discussed. The primary and secondary current characteristics are analyzed when the transformer is in both normal and magnetic bias conditions. Second, two digitalization methods are put forward after the research on PWM adjustment principles, which are based on the primary current feedback. Though the two methods could restrain magnetic bias, their realization is difficult. A new method is researched on double close-loops to overcome the above shortcomings, which uses the secondary current as the feedback signal and the primary current as the protection signal. Finally, the secondary current control made is discussed and realized. Welding experimental results show that the method has strong flexibility and adaptability, which can be used to realize the full digital welding power supply.
