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针对航天供电电源,提出一种星载多路输出正激变换器新型优化方法。该方法对多路输出次级整流电路建模,提出权重系数优化方法;通过对系统采用受控源替代建模法,对所求系统进行小信号建模,结合所提权重系数优化方法,进行闭环参数设计,满足系统交叉调整率和稳定性要求。由于航天电源需要良好的稳定性和交叉调整率,相比单路控制的多路输出变换器,采用加权反馈技术的多路输出变换器在交叉调整率和电压变化率上有良好提升。为验证理论的正确性,搭建了单路控制和采用加权反馈技术的多路输出正激变换器样机,实验验证了所提方法的有效性。 相似文献
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开关电源的多路输出技术发展综述 总被引:2,自引:0,他引:2
主要对开关电源多路输出技术的实现方法进行了系统的阐述。从拓扑结构的角度对开关电源多路输出的实现技术进行分类,并列举了当前较为常见的几种典型拓扑结构。结合调节方法对各种多路输出技术的工作原理、特点及应用场合等进行了系统的分析,并指出了其存在的不足与局限,进而探讨了多路输出技术的发展方向。 相似文献
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通过一种UC3843控制小功率多路输出DC/DC模块电源的详细设计过程的介绍,重点讨论了多路输出模块电源设计中与单路输出不同的地方,详细介绍了DC/DC模块电源中常用的新型芯片UC3843的外围电路参数的设计,给出了多路输出模块电源中变压器和耦合电感的工程设计的详细过程及满足各项性能指标应注意的各种问题。 相似文献
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数字式电火花堆(EDD)修复仪辅助电源需满足为焊枪电机供电、保证数字芯片工作及实现多路输出和电气隔离。传统辅助电源设计方式存在转换效率低、功率密度小、易受干扰、功率等级低等缺点。采用定频LLC谐振变换器加同步Buck两级拓扑的新式辅助电源设计方案,利用高频LLC谐振变换器的软开关能力,可缩小电源体积、提高转换效率,且能实现多路输出间电气隔离,避免相互干扰。通过与传统的辅助电源作比较,突出了所提新式辅助电源的优点,并详细分析了新式辅助电源的工作原理和控制方式,最后通过一台实验样机验证了新式辅助电源的可行性。 相似文献
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直流开关电源的软开关技术及其新发展 总被引:1,自引:0,他引:1
介绍了直流开关电源的软开关技术及其新发展 ,提出了由无损耗缓冲技术和谐振技术组合而成的新型软开关技术将成为新的发展趋势的结论 相似文献
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通过并鄄并和并鄄串两种组合方式的比较,提出了一种新型并鄄串组合双管正激变换器,该组合变换器可以大幅度减少次级整流二极管的电压应力,同时改善次级续流二极管的反向恢复问题。通过交错控制和提高开关频率,大大减小了变换器的体积和重量。研制成功6kW并鄄串组合型双管正激变换器原理样机。 相似文献
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一种三相静止变流器设计 总被引:1,自引:0,他引:1
论述的三相静止变流器采用高频PWM技术 ,利用Boost变换器实现直流升压 ,然后由 12 0°导通型逆变器完成逆变 ,并设计了交流滤波电路 ,使输出波形为正弦波。 相似文献
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Soheil Khosrogorji Sepehr Soori Hossein Torkaman 《International Journal of Circuit Theory and Applications》2019,47(10):1645-1663
In this paper, a new design procedure for LLC converter has been introduced. In fact, this method is a computer-based design algorithm based on a numerical technique. In the process of designing, the value of the resonant element is obtained by solving the LLC converter fundamental equation. This converter will be controlled by using state feedback, such as output voltage variable. As a matter of fact, in a control system, the change of output voltage (because of load variation) will affect the switching frequency, so the output voltage will be tuned. In the designing process, the fundamental equations of LLC converter are obtained, and the value of the resonant elements is calculated. Also, a comparison analysis is carried out between the proposed and typical methods. The simulation is done to investigate the validity of the proposed method. Moreover, a prototype is manufactured, and the experimental test is done to evaluate its applicability. 相似文献
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The paper presents a new variation of selective harmonic elimination pulse-width modulation (SHE-PWM) technique suitable for a high-power five-level converter used in constant frequency utility applications. The governing system of equations associated with the elimination of specific harmonics is defined based on an equal number of switching transitions when compared against the single-carrier sinusoidal PWM (SC-SPWM) technique. For this paper, it is assumed that the modulating signal (triangular carrier) of the equivalent SC-SPWM method has twenty per unit frequency. The switching transitions for every quarter period are therefore distributed between the converter levels according to the modulation index of SC-SPWM. It is confirmed that the proposed technique offers significantly higher converter bandwidth and higher dc bus utilization for the same switching transitions. Furthermore, the proposed SHE-PWM offers better harmonic performance compared to its SC-SPWM counterpart. Selected solutions for the switching transitions are presented and verified experimentally in order to confirm the effectiveness of the proposed technique. 相似文献
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零电压过渡PWM正激变换器的原理与设计 总被引:1,自引:0,他引:1
论述了零电压过渡PWM正激变换器的原理与设计。利用有源钳位电路实现主变压器铁心对称复位,功率开关在宽输入电压和宽负载电流范围内零电压开关。有源钳位技术增强了正激变换器的性能,试验证实了理论分析的正确性。 相似文献
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