High voltage conversion with a continuous input and output current is the prime requirement for electric vehicles and renewable energy applications. In this paper, a new topology based on the Cuk converter is proposed to meet the high step-up gain, reduced switch stress, and continuous input current requirements. The topology is derived from the Cuk converter by using two switches, three inductors, a voltage-lift capacitor, and switched-capacitors. When compared to conventional converters, the proposed converter achieves a high step-up gain with reduced switch stress. Since the topology does not consist of a coupled inductor or transformer structure, voltage spikes during the turnoff process are eliminated. In addition, by simply varying the duty ratio of the two switches, a wide output voltage range is possible. The duty cycle and the switching pulses for the two switches are identical. Hence, the operation and control are simple. To analyze the topology, the continuous conduction mode of operation, voltage, and current stress of the devices, as well as an efficiency analysis are discussed. Finally, a 690 W prototype is implemented to experimentally examine and investigate the proposed converter.

具有连续输入和输出电流的高压转换是电动汽车和可再生能源应用的主要要求。在本文中，提出了一种基于 Cuk 转换器的新拓扑，以满足高升压增益、降低开关应力和连续输入电流的要求。该拓扑是通过使用两个开关、三个电感器、一个电压提升电容器和开关电容器从 Cuk 转换器推导出来的。与传统转换器相比，所提出的转换器在降低开关应力的情况下实现了高升压增益。由于该拓扑不包含耦合电感器或变压器结构，因此可消除关断过程中的电压尖峰。此外，通过简单地改变两个开关的占空比，宽输出电压范围是可能的。两个开关的占空比和开关脉冲相同。因此，操作和控制简单。为了分析拓扑结构，讨论了器件的连续工作模式、电压和电流应力，以及效率分析。最后，实现了一个 690 W 的原型，以对所提出的转换器进行实验检查和研究。