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<p>The capacitor charge power supplies (CCPS) based on homopolar inductor alternator (HIA) still faces significant challenges in terms of efficiency and power density. These limitations are primarily due to the large internal reactance and serious skin effects in the armature winding, low fundamental air-gap magnetic field, and the transient flux attenuation in HIA. To address these challenges, this paper proposes a CCPS based on high-temperature superconducting (HTS) HIA. The aim is to improve power density and efficiency by mitigating the aforementioned issues. The performance of the proposed HTS HIA-based CCPS is evaluated and compared with conventional HIA using FEM simulations. The study focuses on key performance indicators, such as power density, efficiency, and temperature rise. The HTS-HIA-based CCPS demonstrates a significantly higher power density and efficiency, and notably lower temperature rise compared to the conventional HIA. The reduction in internal reactance and the increasing in air-gap magnetic flux density by using slotless stator core and large air-gap length, and the elimination of transient flux attenuation by using HTS coil are critical factors that enhance the power density. The reduction in copper losses due to the slotless stator core and lower electrical frequency which reduces squeezing effects dramatically, along with the lower losses in the stator iron core, are critical factors that enhance the efficiency. The lower temperature rise is due to the much smaller copper loss compared to the conventional HIA. The proposed HTS-HIA-based CCPS shows substantial improvements in efficiency, power density and continuous emission capacity, making it a promising solution for applications such as laser weapons.</p>

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Performance evaluation of high-power PPS based on HTS HIA by using FEM simulation

  • 期刊论文

  • 发表日期：

    2025年5月10日

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  • Longjian Liu,
  • Kexun Yu,
  • Xianfei Xie

摘要

The capacitor charge power supplies (CCPS) based on homopolar inductor alternator (HIA) still faces significant challenges in terms of efficiency and power density. These limitations are primarily due to the large internal reactance and serious skin effects in the armature winding, low fundamental air-gap magnetic field, and the transient flux attenuation in HIA. To address these challenges, this paper proposes a CCPS based on high-temperature superconducting (HTS) HIA. The aim is to improve power density and efficiency by mitigating the aforementioned issues. The performance of the proposed HTS HIA-based CCPS is evaluated and compared with conventional HIA using FEM simulations. The study focuses on key performance indicators, such as power density, efficiency, and temperature rise. The HTS-HIA-based CCPS demonstrates a significantly higher power density and efficiency, and notably lower temperature rise compared to the conventional HIA. The reduction in internal reactance and the increasing in air-gap magnetic flux density by using slotless stator core and large air-gap length, and the elimination of transient flux attenuation by using HTS coil are critical factors that enhance the power density. The reduction in copper losses due to the slotless stator core and lower electrical frequency which reduces squeezing effects dramatically, along with the lower losses in the stator iron core, are critical factors that enhance the efficiency. The lower temperature rise is due to the much smaller copper loss compared to the conventional HIA. The proposed HTS-HIA-based CCPS shows substantial improvements in efficiency, power density and continuous emission capacity, making it a promising solution for applications such as laser weapons.