This paper presents a non-isolated single switch converter with high voltage gain. Its circuit topology is combined with coupled-inductor, clamp circuit, and voltage lift capacitor techniques. The proposed converter has several advantages: First, the circuit is controlled by only single pulse width modulation (PWM) for the power switch, which keeps the circuit simple. Secondly, the proposed converter is used as a clamping circuit,which let the energy of the leakage inductance can be circulated to the capacitor, so that the voltage spike on the active switch can be suppressed, and improves efficiency. This paper will introduce the principle of action, theoretical analysis, and experimental waveform in order. Finally, in the case of input voltage of 48 V, output voltage of 400 V, and output power of 1 kW, the performance of the proposed converter is verified. As a result, the maximum efficiency is up to 96.5% and full load efficiency is 92.3%.

本文提出了一种具有高电压增益的非隔离单开关转换器。其电路拓扑结合了耦合电感器、钳位电路和升压电容器技术。所提出的转换器有几个优点：首先，电路仅由功率开关的单脉冲宽度调制（PWM）控制，这使得电路简单。其次，所提出的转换器用作钳位电路，使漏感的能量可以循环到电容器，从而抑制有源开关上的电压尖峰，并提高效率。本文将按顺序介绍作用原理、理论分析、实验波形。最后，在输入电压为48 V、输出电压为400 V、输出功率为1 kW的情况下，验证了所提出的变换器的性能。结果，最高效率高达96.5%，满载效率为92.3%。