宽功率范围的ICPT系统效率优化研究
发布时间：2018-11-15 20:36
【摘要】：作为无线电能传输系统重要分支，感应耦合电能传输（inductively coupledpower transfer，ICPT）技术通过空间电磁耦合以非接触的形式将电能从固定电源传输给一个或多个移动负载。ICPT系统宽功率的应用以及高效率的能量传输是ICPT技术迫不及待的发展趋势。本文以多功率等级的多种家电设备在ICPT系统通用能量供电平台高效率稳定运行为目标来实现系统工作频率和效率的自适应控制。旨在通过分析系统结构、参数特性，设计电容阵列动态调节方案和改进模糊控制策略，保证不同功率等级的负载切换后，整个系统仍然以满足要求的高效率稳定运行。本文的主要工作如下： ①针对ICPT系统通用能量供电平台的负载具有随机性的特点，以提高系统对多功率等级的负载的兼容能力和确保系统高效稳定运行为目标。根据频闪映射建模和周期不动点理论，，建立ICPT系统的精确数学模型和基于软开关工作点的频率模型；分析了负载随机变化时系统的工作频率特性和系统的输出特性。通过对系统电流模型和效率模型的建立，研究负载功率等级变化情况下的效率优化问题；采用电容阵列动态调节电路并设计改进模糊控制算法，动态调节初级谐振电容阵列等效值，确保系统负载参数变化时，工作频率的稳定，以提高系统功率传输效率和确保系统稳定性。 ②针对负载随机变化可能引起的启动问题，提出了一种基于能量注入和自由谐振模式的ICPT系统定频启动优化策略，以实现系统定频启动到浮频控制的平滑切换和对空载运行的电压型ICPT系统的快速保护。针对ICPT系统通用能量供电平台的随机负载未知的问题，提出了一种基于能量注入和自由谐振模式的负载检测方法实现对负载值的检测。确保了负载随机变化的ICPT系统通用能量供电平台启动过程的安全可靠性。 ③通过分析原边谐振电容与输出功率的关系，得到不同功率等级的系统所对应的原边谐振电容的阈值和达到效率要求所需要的原边谐振电容值。以系统的体积要求、系统的控制精度要求、电容阵列的控制步长等要求为依据，设计了两种电容阵列动态调节方案实现对系统频率和效率的控制。
[Abstract]:As an important branch of radio energy transmission system, inductively coupled electric energy transmission (inductively coupledpower transfer,) ICPT) technology transmits electric energy from a fixed power source to one or more mobile loads through space electromagnetic coupling. The application of wide power and high efficiency energy transmission in ICPT system is the development trend of ICPT technology. The aim of this paper is to realize the adaptive control of the working frequency and efficiency of the ICPT system based on the high efficiency and stable operation of the multi-power multi-level household appliances in the general energy power supply platform of the ICPT system. By analyzing the system structure, parameter characteristics, designing the capacitor array dynamic adjustment scheme and improving the fuzzy control strategy, the whole system is still running with high efficiency and stability after load switching with different power levels. The main work of this paper is as follows: 1 aiming at the randomness of the load of the general energy power supply platform in ICPT system, the aim is to improve the compatibility ability of the system to the load with multiple power levels and to ensure the efficient and stable operation of the system. Based on stroboscopic mapping modeling and periodic fixed point theory, the exact mathematical model of ICPT system and the frequency model based on soft-switching operating point are established, and the operating frequency characteristics of the system and the output characteristics of the system under random load variation are analyzed. Through the establishment of the current model and efficiency model of the system, the efficiency optimization problem under the condition of load power level change is studied. By adopting the capacitor array dynamic regulation circuit and designing the improved fuzzy control algorithm, the equivalent value of the primary resonant capacitor array is dynamically adjusted to ensure the stability of the operating frequency when the load parameters of the system change. In order to improve the efficiency of power transmission and ensure the stability of the system. In order to solve the startup problem caused by random load variation, a fixed frequency startup optimization strategy for ICPT system based on energy injection and free resonance mode is proposed. In order to realize the smooth switching from fixed frequency start to floatation control and the fast protection of no-load voltage-type ICPT system. A load detection method based on energy injection and free resonance mode is proposed to detect the load value of the general energy supply platform of ICPT system. It ensures the safety and reliability of the startup process of the general energy power supply platform of ICPT system with random load variation. By analyzing the relationship between the primary side resonant capacitance and the output power, the threshold value of the primary side resonant capacitance and the value of the primary side resonant capacitance required to meet the efficiency requirements are obtained for the system with different power levels. According to the requirements of system volume, control precision and control step of capacitor array, two kinds of dynamic control schemes of capacitor array are designed to control the frequency and efficiency of the system.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724
本文编号：2334386
[Abstract]:As an important branch of radio energy transmission system, inductively coupled electric energy transmission (inductively coupledpower transfer,) ICPT) technology transmits electric energy from a fixed power source to one or more mobile loads through space electromagnetic coupling. The application of wide power and high efficiency energy transmission in ICPT system is the development trend of ICPT technology. The aim of this paper is to realize the adaptive control of the working frequency and efficiency of the ICPT system based on the high efficiency and stable operation of the multi-power multi-level household appliances in the general energy power supply platform of the ICPT system. By analyzing the system structure, parameter characteristics, designing the capacitor array dynamic adjustment scheme and improving the fuzzy control strategy, the whole system is still running with high efficiency and stability after load switching with different power levels. The main work of this paper is as follows: 1 aiming at the randomness of the load of the general energy power supply platform in ICPT system, the aim is to improve the compatibility ability of the system to the load with multiple power levels and to ensure the efficient and stable operation of the system. Based on stroboscopic mapping modeling and periodic fixed point theory, the exact mathematical model of ICPT system and the frequency model based on soft-switching operating point are established, and the operating frequency characteristics of the system and the output characteristics of the system under random load variation are analyzed. Through the establishment of the current model and efficiency model of the system, the efficiency optimization problem under the condition of load power level change is studied. By adopting the capacitor array dynamic regulation circuit and designing the improved fuzzy control algorithm, the equivalent value of the primary resonant capacitor array is dynamically adjusted to ensure the stability of the operating frequency when the load parameters of the system change. In order to improve the efficiency of power transmission and ensure the stability of the system. In order to solve the startup problem caused by random load variation, a fixed frequency startup optimization strategy for ICPT system based on energy injection and free resonance mode is proposed. In order to realize the smooth switching from fixed frequency start to floatation control and the fast protection of no-load voltage-type ICPT system. A load detection method based on energy injection and free resonance mode is proposed to detect the load value of the general energy supply platform of ICPT system. It ensures the safety and reliability of the startup process of the general energy power supply platform of ICPT system with random load variation. By analyzing the relationship between the primary side resonant capacitance and the output power, the threshold value of the primary side resonant capacitance and the value of the primary side resonant capacitance required to meet the efficiency requirements are obtained for the system with different power levels. According to the requirements of system volume, control precision and control step of capacitor array, two kinds of dynamic control schemes of capacitor array are designed to control the frequency and efficiency of the system.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724
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