摘要
针对感应电能传输系统中激磁电流(谐振电流)的控制问题,本文提出一种基于参数动态辨识的恒流控制策略。该方法从能量分析的角度,建立了系统谐振回路中能量存储、供给与耗散函数,通过分别建立系统周期内与周期间的能量平衡关系,得到了系统反射阻抗的辨识函数。该方法提出了采用Buck变换器控制系统输入电压以实现谐振电流恒流的控制方案。基于系统输入电压与谐振电流峰值包络的函数关系,结合Buck变换器的输入输出函数关系,建立了系统的恒流控制律。通过实验验证了该控制方法的可行性。该方法的参数辨识环节仅需采样原边部分的谐振电流和电压过零采样数据,简化了系统的采样系统设计。而基于参数辨识的恒流控制律不需要复杂的算法计算,易于实现。
Aiminy at magnetic exciting current （resonant current） control, a constant current control method based on dynamic parameter identification is put forward. With energy conversion analysis, the energy storage, supply and dissipation functions of the system resonant network are constructed. The reflecting impedance identification functions are obtained by constructing the energy equilibrium relations in a period and among several periods. Furthermore, a constant current control strategy by regulating the system input voltage with Buck converter is presented. Combining the relations among system input voltage, the envelope of resonant current and the input of Buck converter, the constant current control law is proposed. The control law is verified with experiments. For the proposed method, in parameter identification, only the data of zero crossing point of resonant voltage and current are required, which reduces the complexity and costs of sampling system. Also, the constant current control law does not need complex computation and is easy to implement.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第6期98-104,共7页
Journal of Chongqing University
基金
国家自然科学基金资助项目(50807057)
博士后资助项目(200902285)
关键词
参数辨识
能量传输
恒流
parameter identification
power transfer
constant current
