在无线电能传输系统的设计中，可以在系统中添加多个发射源来提升系统的功率传输能力以及降低功率变换器件上的电压电流应力。本文设计了一种双发射无线电能传输系统，该系统有两种工作模式：休眠工作模式和增强工作模式。当接收端所需功率比较低时，其中一个发射端将工作在休眠工作模式，仅由另外一个发射端为接收端提供能量；当接收端所需功率比较高时，该发射端将由休眠工作模式切换到增强工作模式，连同另外一个发射端一起为接收端提供能量。除此之外，针对两个独立的发射端逆变器的输出电压相位不一致带来的能量抵消问题，本文提出了一种同步控制方法来使二者保持同步以提升系统的功率传输能力。最后通过实验验证了所提方案的可行性和有效性。

In the design of wireless power transfer system, multiple transmitters can be added to the system to improve the power transmission capacity of the system and reduce the voltage and current stress on the power conversion components. A dual-transmitter wireless power transfer system is proposed in this paper, which includes two operating modes: standby operation mode and strengthening operation mode. When the power required by the receiver is relatively low, one transmitter will work in the standby operation mode, and only the other transmitter provides power for the receiver to reduce the system loss; When the power required by the receiver is relatively high, the transmitter will switch from standby operation mode to strengthening operation mode, and provide power for the receiver together with another transmitter. In addition, aiming at the energy cancellation problem caused by the inconsistent output voltage phases of the two transmitter inverters, this paper proposes a synchronization control method to keep them synchronized to improve the power capacity of the system. Finally, the feasibility and effectiveness of the proposed method are verified by experiments.