Research on Hybrid Power Amplifier Based on MMC and LPA
This paper studies the topology and control strategy of a hybrid power amplifier(HPA)based on modular multilevel converter(MMC)and linear power amplifier(LPA).The hybrid power amplifier can be directly connected to a high-voltage DC power supply,and it is easy to expand in capacity and has high reliability.In order to improve the efficiency and fidelity of the hy-brid power amplifier,the system integrated circuit model is established.The main factors affecting the output performance of the power amplifier are analyzed.The corresponding control method is proposed and design scheme of the control system is given.Final-ly,the feasibility of hybrid topology and the correctness of the control method are verified by simulation.Experimental results are presented to demonstrate the suitable performance of the output voltage waveform,and the aim of high efficiency and high fidelity is achieved.
hybrid power amplifiermodular multilevel converterlinear power amplifierhigh fidelityhigh efficiency
万方数据
维普
