具有宽频带输出能力的电力电子功率放大器在诸多领域均有应用需求。E类功率放大器和D类功率放大器是电力电子功率放大器中最典型的两种拓扑。本文分别对宽频带E类功率放大器和宽频带D类放大器进行了研究。首先，为了给宽频带电力电子功率放大器的研究过程提供高效的仿真工具，对DSIM仿真软件控制解算框架进行了改进，在原有的控制解算框架中加入了连续传递函数、控制代数环和辅助电路代数环求解的解算框架。并在这个过程中提出了一种可以最小化控制代数环求解所需代数方程数目的控制代数环求解策略，有效提高了控制代数环的求解效率。使用三个仿真算例对DSIM控制结算框架改进后的仿真能力进行了测试。测试结果表明在纯代数环求解算例和控制系统含有负载代数环的微网系统仿真算例中，改进后的DSIM软件能得到和商业仿真软件一致的仿真结果，并实现1.5到超过2倍的提速。在高频推挽型E类功放仿真算例中，DSIM软件能在可接受时间内仿真得到和硬件实验一致的结果。DSIM仿真软件控制解算框架的改进，不仅为宽频带电力电子功率放大器的设计和研制提供了仿真支持，还大幅提升DSIM仿真软件的通用性。之后，对宽频带推挽型E类功率放大器进行了设计和研制。对推挽型E类功率放大器稳态运行的理论方程进行了推导。基于推挽型E类功率放大器稳态运行的理论方程，提出了一种通过控制输入电压和开关占空比，将控制和硬件设计相结合，实现推挽型E类功率放大器宽频带运行的控制策略。在理论推导的基础上，设计并制作了输出频带为10MHz-20MHz的推挽型E类功率放大器样机，并通过硬件实验验证了样机的输出频带和输出效率。该样机的最大输出功率为80W，最大效率可达93%。和已有的宽频带电力电子功率放大器研究相比，该样机能够在不使用可变电路元件的情况下，达到更高的输出频率，更大的输出带宽比和可比的输出功率和效率。最后，设计并研制了一个最大开关频率为2MHz的宽频带D类功率放大器样机，完成了其总体系统架构、PWM生成模块、驱动和主电路模块以及输出滤波器等各模块设计并完成了样机制作。通过硬件实验，测试了样机在谐振输出和调制输出两种工作模式下的宽频带输出性能。
Broadband power electronics power amplifiers are in demand in many fields. Class E power amplifiers and Class D power amplifiers are the two typical topologies in power electronic power amplifiers. Therefore, this article studies the broadband Class E power amplifier and the broadband Class D amplifier respectively.First of all, in order to provide an efficient simulation tool for the research process of broadband power electronic power amplifiers, the DSIM simulation software controller solving framework has been improved. The solution frameworks of the continuous transfer function, control algebraic loop and auxiliary functions which help solving circuit algebraic loop have been added to the original controller solving framework. In this process, a control algebraic loop solving strategy is proposed that can minimize the number of algebraic equations required to solve a specific control algebraic loop, which effectively improves the solving efficiency of the control algebraic loop, thus speeding up the simulation process. To validate the algorithm‘s effectiveness, three simulation cases simulated improved DSIM software. The results of an algebraic equation test and a simulation case involving a real distributed grid system are simulated with the proposed algorithm demonstrate improved DISM achieves comparable accuracy to commercial software but with 1.5 to more than 2 times speed up. The results of a high frequency push-pull Class E power amplifier simulation demenstrate improved DSIM gets comparable waveform with hardware experiment with acceptable time.The improvement of the DSIM simulation software controller solving framework not only provides efficient simulation support for the design of broadband power electronics power amplifiers and the validation of the design, but also greatly expands the simulation capabilities of DSIM for complex power electronics systems.Afterwards, a broadband push-pull Class E power amplifier was designed and developed. The theoretical equations for steady-state operation of the push-pull Class E power amplifier was derivated. Based on the theoretical derivation, a control strategy was proposed to achieve broadband operation of the push-pull Class E power amplifier by controlling the input voltage and switching duty cycle according to the output frequency and output power, together with proper hardware design. Based on the theoretical derivation, a push-pull Class E power amplifier prototype with an output frequency band from 10MHz to 20MHz was designed and assembled. The proposed control strategy and output frequency band of the prototype was verified through hardware experiments. The measured maximum output power of the prototype is 80W and the maximum efficiency is approximately 93%。Compared with state-of-art broadband power electronics power amplifier, the prototype can achieve higher output frequency, higher output fractional bandwidth, and comparable output power and efficiency, without tunable componentsFinally, a broadband Class D power amplifier prototype with maximum switching frequency of 2MHz was designed and developed. The overall system architecture, PWM generation module, driver and main circuit module, output filter and other modules were designed and the prototype was completed. Through hardware experiments, the broadband output performance of the prototype in two working modes, resonant output and modulated output, was tested.
