High-voltage dc power supplies (HVDCPSs) have been widely adopted for the vacuum tubes. In this application field, the low ripple voltage cannot be easily achieved by increasing the size of the output capacitance of the HVDCPS due to the limited permissible level of the stored energy. To obtain a low level of the output ripple as well as the limited value of the stored energy, the previously published literature proposed switching frequency increment. This approach has several shortcomings such as switching power loss increment, a limited level of the achievable ripple, and low value of the insulators’ lifetime. To improve the mentioned deficiencies, this article hybridizes the series linear regulator and a high-frequency high-power dc interleaved converter. Using the proposed method, at the first stage, the level of the ripple decreases to a rational margin with increasing the ripple frequency. At the second stage, the level of the ripple reduces using the linear regulator to reach the expected precision. In order to validate the performance of the proposed structure, simulation and experimental results are provided for a 15-kV and 22.5-kW converter with the output voltage precision of 0.02%.

中文翻译：

---

使用交错式转换器和线性纹波消除单元的超低纹波高压大功率直流电源

高压直流电源 (HVDCPS) 已广泛用于真空管。在该应用领域，由于存储能量的允许水平有限，通过增加 HVDCPS 的输出电容的大小无法轻易实现低纹波电压。为了获得低水平的输出纹波以及存储能量的有限值，先前发表的文献提出了开关频率增量。这种方法有几个缺点，例如开关功率损耗增加、可实现的纹波水平有限以及绝缘体的寿命值低。为了改善上述不足，本文将串联线性稳压器和高频大功率直流交错式转换器混合使用。使用所提出的方法，在第一阶段，随着纹波频率的增加，纹波的水平会降低到一个合理的范围。在第二阶段，使用线性稳压器降低纹波水平以达到预期精度。为了验证所提出结构的性能，提供了输出电压精度为 0.02% 的 15 kV 和 22.5 kW 转换器的仿真和实验结果。