【作者】 罗萍；

【导师】 陈光（礻禹）；

【作者基本信息】 电子科技大学 ， 电路与系统， 2004， 博士

【摘要】 迄今,智能功率集成电路(SPIC)习用控制模式为恒频变宽(CFVW)的脉宽调制模式(PWM)和恒宽变频(CWVF)的脉频调制模式(PFM)。PWM调制模式的SPIC在低负载下效率较低,控制脉冲谐波干扰较大;PFM控制电路较为复杂,谐波分布时变且过于分散,给后续滤波器设计带来困难。本论文提出了一种SPIC功率变换系统的全新调制模式——脉冲跨周调制模式,简称跨周调制模式(PSM,Pulse Skip Modulation)。PSM异于PWM和PFM,是一种恒频恒宽(CFCW)的调制模式。研究表明PSM能有效改善SPIC开关变换系统的效率和EMI特性,且具响应速度快,抗干扰能力强,鲁棒性健壮,电路易于实现等特点。据作者查新显示,本论文对PSM的理论研究在国内外未见报道。 本论文着重研究了PSM的调制理论、SPIC的EMI测试与抑制技术,并根据PSM调制机理研制了一种SPIC实例。研究成果如下: 1.PSM调制理论的研究: 1) 首次提出功率变换系统跨周调制PSM的概念,阐述了PSM模式通过改变跨周数而改变输出电压的调制机理。 2) 首次建立PSM变换电路状态空间平均模型和大信号模型。基于状态空间平均模型,分析了PSM变换电路的稳态响应特性、效率特性;基于包括大信号解析模型、离散迭代模型和相平面模型在内的大信号模型,研究分析了PSM变换电路的瞬态响应特性和抗干扰性能。 3) 提出SPIC功率变换电路的模糊型跨周调制模式FPSM(Fuzzy PSM),并给予理论研究、模型设计和特性分析。 2.论文研究了SPIC的EMI测试与抑制措施,提出PSM载波调制技术,用以EMI抑制,并给予理论分析。针对常规传导型EMI差模、共模噪声混合测试的问题,提出一种CM/DM分离测试网络。同时,提出一种将常规窄带FFT测试用于能满足CISPR测试标准的测试转换方式。 3.论文研究了PSM、FPSM以及PSM载波调制的IC实现技术,研究了具有电流极限状态机制的PSM控制电路和具有多频调制的频率抖动电路的单片功率集成电路的设计思想,并给出了基于PSM调制理论所设计的SPIC实例芯片的部分电路、总体版图和测试结果。 本论文在理论上,研究了具有国际前沿水平的功率变换控制模式;在应用上,实际指导了SPIC芯片的设计。分析研究表明,论文提出的SPIC的PSM和FPSM更多还原

【Abstract】 Up to now, the popular control modes for smart power integrated circuit (SPIC) are PWM and PFM. PWM bases on CFVW (Constant Frequency Variable Width) control pulse, whereas, PFM bases on CWVF (Constant Width Variable Frequency) control pulse. PWM converter has low efficiency with light loads and high amplitude harmonic. On the other hand, the control circuit and filter for PFM are much complex. This dissertation proposes a novel modulation mode named PSM (Pulse Skip Modulation) for SPIC converter, which bases on CWCF (Constant Width Constant Frequency) control pulse. It is shown that PSM converter would improve its efficiency and suppress EMI. It also has quick response speed, good interfere rejection and strong robust. Furthermore, it is easy to realize PSM control circuit. The modulating theories of PSM are firstly studied in the world according to the author’s investigation,This dissertation majors on studying the theories and principles of PSM, EMI measurement and EMI suppression teclinique and a SPIC example based on the PSM theories. The detail contributions of the dissertation are listed as follow:1. The modulating theories of PSM studied in this dissertation include threeaspects:1) The concept of PSM for electrical converter systems is firstly proposed in this dissertation. The modulating principle of PSM that adjusting the skipped cycles to regulate the output voltage is expounded in this dissertation.2) The state space averaging mode and the large signal modes of PSM are firstly built in this dissertation. Basing on the state space averaging mode, the stability response characteristics and efficiency are analyzed. The big signal modes include big signal analytic mode, discrete iterative mode and phase plane mode. Basing on these modes, the dynamic response characteristics and interfere rejection behavior of PSM converter are analyzed in the dissertation.3) A novel modulation mode for SPIC converter named fuzzy pulse skip modulation mode (FPSM) is also proposed and studied in this dissertation.2. The EMI measurement and rejection technique are also discussed in this dissertation. The technique and principle of carrier frequency modulation for PSM signal are given in succession for depressing EMI emission. A novel更多还原