Taking account of the voltage floating of the DC side of Unified Power Flow Controller in working process, a dynamic SPWM method is proposed, to promote the accuracy of the output of the inverter. 针对统一潮流控制器在逆变变换过程中所具有的直流侧电压不断波动的特点,提出了动态SPWM方法,以克服逆变电源的直流电压波动对SPWM法的逆变输出的精确性所造成的影响。
Due to the opening loop instability and very strong nonlinearity of magnetic floating systems, researches on controlling method become very important. The quality of the controller affects the dynamic performance of the system directly. 由于磁悬浮系统具有开环不稳定和强烈非线性的特点,使得对磁悬浮寻北仪控制方法的研究成为重要的一环,其控制器性能的好坏直接影响到磁悬浮寻北仪的动态性能等特性。
Finally the hardware and software of the dual redundant digital brake controller is designed. The "full floating" technology is used in this controller and cross-dual redundant technology is realized which make the controller have high reliability. 最后进行数字式双余度刹车控制器硬件和软件设计,该控制器采用全浮空技术,实现了交叉双冗余技术,具有较高的可靠性。
The voltage regulation part of floating frequency and voltage energy-saving controller uses PID controlling method to realize real-time control of the voltage of marine electric power system. 本论文所设计的浮动频压节能控制器调压环节采用西门子S7-200系列PLC作为核心控制器,利用PID控制功能对船舶电网的电压进行实时地控制。