Scholarlink

<p>This paper proposes an output estimation method for series resonant converter operating in discontinuous conduction mode (DCM-SRC) used as a filament power supply. To operate a magnetron, a main power supply that generates high-voltage pulses in the tens of kV and an auxiliary power supply that heats the filament are required. Due to the load characteristics that are proportional to the temperature and impedance of the filament, the filament power supply requires current source characteristic. The filament power supply has output voltages of only several tens of volts, but insulation of more than 50&#xa0;kV is required due to the high potential at the output side. In addition, the sensing circuit for output measurement also requires high-voltage insulation and an isolation interface. To solve this problem, this paper proposes a method that can estimate the output using information of the low voltage side. To minimize the estimation error, operation mode analysis and estimation method including parasitic components were derived. For validation of the derived method, filament power supplies with specifications of 20&#xa0;V and 20&#xa0;A for the 3&#xa0;MW class magnetron drive system were modeled. Through simulation, voltage and current estimation errors were shown to remain within 0.52% and 0.12% under various output conditions, verifying that the proposed estimation method is valid and practically applicable. Furthermore, through controller validation experiments, the proposed method was confirmed to be effectively applicable, achieving average voltage and current estimation errors of 1.14% and 1.13%, respectively, under various output conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Study of Output Estimation Method in DCM Series Resonant Converter for High-Voltage Application

  • 期刊论文

  • 发表日期：

    2026年2月3日

查看全文
  • Pyeong-Kang Kim,
  • Sang-Min Lee,
  • Seung-Ho Song

摘要

This paper proposes an output estimation method for series resonant converter operating in discontinuous conduction mode (DCM-SRC) used as a filament power supply. To operate a magnetron, a main power supply that generates high-voltage pulses in the tens of kV and an auxiliary power supply that heats the filament are required. Due to the load characteristics that are proportional to the temperature and impedance of the filament, the filament power supply requires current source characteristic. The filament power supply has output voltages of only several tens of volts, but insulation of more than 50 kV is required due to the high potential at the output side. In addition, the sensing circuit for output measurement also requires high-voltage insulation and an isolation interface. To solve this problem, this paper proposes a method that can estimate the output using information of the low voltage side. To minimize the estimation error, operation mode analysis and estimation method including parasitic components were derived. For validation of the derived method, filament power supplies with specifications of 20 V and 20 A for the 3 MW class magnetron drive system were modeled. Through simulation, voltage and current estimation errors were shown to remain within 0.52% and 0.12% under various output conditions, verifying that the proposed estimation method is valid and practically applicable. Furthermore, through controller validation experiments, the proposed method was confirmed to be effectively applicable, achieving average voltage and current estimation errors of 1.14% and 1.13%, respectively, under various output conditions.