This study deals with steady-state analysis and control of a step-up interleaved winding cross-coupled inductor DC–DC converter with high voltage gain and reduced voltage stress across semiconductors using voltage multiplier cells (VMCs). Because of the interleaved scheme, the thermal stress is reduced and the input current ripple is minimised. The leakage energy is recycled by passive lossless clamp circuit to the output. Meanwhile, the voltage stress across the semiconductors is substantially low. Hence, MOSFETs with less ON-state resistances and diodes with a less forward voltage drop can be utilised that improves the circuit performance. The operation principle and the steady state are discussed. Small-signal modelling of the proposed converter is derived via state-space averaging technique and a dual loop controller for output voltage regulation is designed. The adopted strategy utilises a fast dynamical inner loop to control the input current and an outer loop for the output voltage regulation. Finally, a 1 kW prototype with 60 V–1 kV voltage conversion is fabricated and tested to probe the carried analysis.

中文翻译：

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直流微电网应用的高效交错式超大增益DC-DC转换器分析

这项研究涉及使用电压倍增单元（VMC）对具有高电压增益并降低半导体两端的电压应力的升压交错绕组交叉耦合电感器DC-DC转换器进行稳态分析和控制。由于采用了交错方案，因此降低了热应力，并使输入电流纹波最小。泄漏能量通过无源无损钳位电路循环到输出。同时，跨半导体的电压应力非常低。因此，可以使用导通电阻较小的MOSFET和正向压降较小的二极管，从而改善电路性能。讨论了工作原理和稳态。通过状态空间平均技术推导了该转换器的小信号建模，并设计了用于输出电压调节的双环路控制器。所采用的策略利用快速动态内部环路来控制输入电流，并利用外部环路来调节输出电压。最后，制造了一个具有60 V–1 kV电压转换的1 kW原型，并进行了测试以探测所进行的分析。