This paper proposes a new type of pulse launcher that applies the principle of linear motors. The stator, viz. gun barrel, of the launcher has a new structure of one segment of iron core consisting of 3 staggered lami...This paper proposes a new type of pulse launcher that applies the principle of linear motors. The stator, viz. gun barrel, of the launcher has a new structure of one segment of iron core consisting of 3 staggered laminations. This structure is helpful in advancing the thrust force per volume. Based on introducing the structure and the working principles, this paper resolves the electromagnetic thrusting force and performs mechanical analysis and experiments on the sample launcher. The research shows that this launcher is simple and brushless structure with brief controlling.展开更多
通用的级联型H桥多电平高压逆变器一般采用载波移相SPWM和错时采样SVPWM技术。基于对多电平PWM控制仿真模型的构建及分析,针对这两种技术共有的占用系统资源多和实时性差等缺点,提出一种新型简化多电平PWM技术——单元矢量延时叠加PWM(O...通用的级联型H桥多电平高压逆变器一般采用载波移相SPWM和错时采样SVPWM技术。基于对多电平PWM控制仿真模型的构建及分析,针对这两种技术共有的占用系统资源多和实时性差等缺点,提出一种新型简化多电平PWM技术——单元矢量延时叠加PWM(Overlap time staggered PWM,OTS-PWM)技术,并总结出相应的PWM调制规律。分别对OTS-SPWM和OTS-SVPWM调制技术的仿真实现,表明了本方法能够显著降低了运算复杂度,且实时性好,并验证OTS-PWM技术的有效性和通用性,及其在级联多电平PWM领域的广阔应用前景。展开更多
文摘This paper proposes a new type of pulse launcher that applies the principle of linear motors. The stator, viz. gun barrel, of the launcher has a new structure of one segment of iron core consisting of 3 staggered laminations. This structure is helpful in advancing the thrust force per volume. Based on introducing the structure and the working principles, this paper resolves the electromagnetic thrusting force and performs mechanical analysis and experiments on the sample launcher. The research shows that this launcher is simple and brushless structure with brief controlling.
文摘通用的级联型H桥多电平高压逆变器一般采用载波移相SPWM和错时采样SVPWM技术。基于对多电平PWM控制仿真模型的构建及分析,针对这两种技术共有的占用系统资源多和实时性差等缺点,提出一种新型简化多电平PWM技术——单元矢量延时叠加PWM(Overlap time staggered PWM,OTS-PWM)技术,并总结出相应的PWM调制规律。分别对OTS-SPWM和OTS-SVPWM调制技术的仿真实现,表明了本方法能够显著降低了运算复杂度,且实时性好,并验证OTS-PWM技术的有效性和通用性,及其在级联多电平PWM领域的广阔应用前景。
