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[Keyword] maximum operating frequency(1hit)

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  • Analytical Model of Maximum Operating Frequency of Class-D ZVS Inverter with Linearized Parasitic Capacitance and any Duty Ratio Open Access

    Yi XIONG  Senanayake THILAK  Yu YONEZAWA  Jun IMAOKA  Masayoshi YAMAMOTO  

     
    PAPER-Circuit Theory

      Pubricized:
    2023/12/05
      Vol:
    E107-A No:8
      Page(s):
    1115-1126

    This paper proposes an analytical model of maximum operating frequency of class-D zero-voltage-switching (ZVS) inverter. The model includes linearized drain-source parasitic capacitance and any duty ratio. The nonlinear drain-source parasitic capacitance is equally linearized through a charge-related equation. The model expresses the relationship among frequency, shunt capacitance, duty ratio, load impedance, output current phase, and DC input voltage under the ZVS condition. The analytical result shows that the maximum operating frequency under the ZVS condition can be obtained when the duty ratio, the output current phase, and the DC input voltage are set to optimal values. A 650 V/30 A SiC-MOSFET is utilized for both simulated and experimental verification, resulting in good consistency.