感应耦合电能传输系统最优ZVS控制策略研究

Study of Optimal ZVS Control Strategy in Inductive Coupled Power Transmission System

以电压源型感应耦合电能传输(ICPT)系统为分析对象,讨论功率流控制的最佳零电压开关(ZVS)调制策略。引入全桥谐振逆变器的广义调制控制方法,分析功率器件ZVS软开关的相角裕度与开关频率和控制角度之间的关系,提出一种最优ZVS控制策略,并与当前广泛使用的移相控制策略和不对称PWM控制策略进行对比。分析结果表明,最优ZVS控制方法具有相对最大的ZVS软开关相角裕度,间接说明了该方式下开关管的开关损耗最小,能够获得较高的传输效率。系统实验结果验证了理论分析和控制方法的正确性和有效性。

Taking voltage source inductive coupled power transfer（ICPT） system as an object, this article is to discuss optimal zero voltage switching （ZVS） modulation strategy in power flow control.Generalized modulation control method of full-bridge resonant inverter is introduced.By analyzing the relationship between phase margin of ZVS soft switch of power devices and switching frequency and control angle, an optimal ZVS control strategy is proposed,which is compared with phase shift control strategy and asymmetric PWM control strategy.Tbe resuhs show that optimal ZVS control methods has the largest ZVS soft switching phase margin relatively,which indirectly illustrates that working in this way, the power devices have the minimum switching loss and will achieve higher transmission effficiency.An ICPT system is built and the experimental results are consistent with theoretical analysis .