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<p>In complex marine environments, wireless power transmission (WPT) receivers can be easily shifted with the water flow, which causes the mutual inductance to fluctuate, affecting the stability of the output voltage. Therefore, this paper proposes a constant voltage output control method for underwater wireless power transmission systems based on topology switching. First, by combining the LCC-S and S-S topologies, the output voltage stability is maintained by using the output characteristics of the two topologies under different coupling conditions. Second, by measuring the effective value of the primary side current, the mutual inductance value can be estimated without communication. On this basis, constant voltage output control is realized by quickly calculating the conduction angle strategy. Finally, an experimental platform is constructed and experimental verifications are carried out. Results show that when the system has a 0–11&#xa0;cm offset, the voltage output can be maintained at about 12&#xa0;V.</p>

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Constant voltage control strategy for wireless power transmission systems

  • 期刊论文

  • 发表日期：

    2026年1月12日

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  • Zhongjiu Zheng,
  • Yanpeng Ma,
  • Zhilong Wu,
  • Xingfeng Cao,
  • Jinjun Bai

摘要

In complex marine environments, wireless power transmission (WPT) receivers can be easily shifted with the water flow, which causes the mutual inductance to fluctuate, affecting the stability of the output voltage. Therefore, this paper proposes a constant voltage output control method for underwater wireless power transmission systems based on topology switching. First, by combining the LCC-S and S-S topologies, the output voltage stability is maintained by using the output characteristics of the two topologies under different coupling conditions. Second, by measuring the effective value of the primary side current, the mutual inductance value can be estimated without communication. On this basis, constant voltage output control is realized by quickly calculating the conduction angle strategy. Finally, an experimental platform is constructed and experimental verifications are carried out. Results show that when the system has a 0–11 cm offset, the voltage output can be maintained at about 12 V.