Design of High-Voltage Switch-Mode Power Amplifier Based on Digital-Controlled Hybrid Multilevel Converter

IF 1.3 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Active and Passive Electronic Components Pub Date : 2016-09-20 DOI:10.1155/2016/3982594

Y. Hou, Wanrong Sun, Aifeng Ren, Shuming Liu

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Abstract

Compared with conventional Class-A, Class-B, and Class-AB amplifiers, Class-D amplifier, also known as switching amplifier, employs pulse width modulation (PWM) technology and solid-state switching devices, capable of achieving much higher efficiency. However, PWM-based switching amplifier is usually designed for low-voltage application, offering a maximum output voltage of several hundred Volts. Therefore, a step-up transformer is indispensably adopted in PWM-based Class-D amplifier to produce high-voltage output. In this paper, a switching amplifier without step-up transformer is developed based on digital pulse step modulation (PSM) and hybrid multilevel converter. Under the control of input signal, cascaded power converters with separate DC sources operate in PSM switch mode to directly generate high-voltage and high-power output. The relevant topological structure, operating principle, and design scheme are introduced. Finally, a prototype system is built, which can provide power up to 1400 Watts and peak voltage up to ±1700 Volts. And the performance, including efficiency, linearity, and distortion, is evaluated by experimental tests.

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基于数字控制混合多电平变换器的高压开关功率放大器设计

与传统的a类、b类和ab类放大器相比，d类放大器也被称为开关放大器，采用脉宽调制(PWM)技术和固态开关器件，能够实现更高的效率。然而，基于pwm的开关放大器通常设计用于低压应用，提供几百伏的最大输出电压。因此，在基于pwm的d类放大器中，必须采用升压变压器来产生高压输出。本文基于数字脉冲阶跃调制(PSM)和混合多电平变换器，研制了一种无升压变压器的开关放大器。在输入信号的控制下，具有独立直流源的级联功率变换器以PSM开关方式工作，直接产生高压大功率输出。介绍了相应的拓扑结构、工作原理和设计方案。最后，建立了一个原型系统，该系统可提供高达1400瓦的功率和高达±1700伏的峰值电压。并通过实验测试对其性能进行了评价，包括效率、线性度和失真度。

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来源期刊

Active and Passive Electronic Components ENGINEERING, ELECTRICAL & ELECTRONIC-

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

13 weeks

期刊介绍： Active and Passive Electronic Components is an international journal devoted to the science and technology of all types of electronic components. The journal publishes experimental and theoretical papers on topics such as transistors, hybrid circuits, integrated circuits, MicroElectroMechanical Systems (MEMS), sensors, high frequency devices and circuits, power devices and circuits, non-volatile memory technologies such as ferroelectric and phase transition memories, and nano electronics devices and circuits.