SYSTEM FOR CONTROLLING CAPACITOR VOLTAGE OF CCM RESONANCE TYPE CONVERTER, AND CCM RESONANCE TYPE CONVERTER COMPRISING CAPACITOR VOLTAGE CONTROL SYSTEM

摘要

The capacitor voltage control system of the CCM resonant converter includes a voltage measuring unit, a voltage controlling unit, a switching frequency modulating unit, and a switching frequency selecting unit. The voltage measuring unit measures the voltage of the capacitor connected to the output terminal of the CCM resonant converter, the voltage controller generates a charge control signal for the CCM resonant converter using the measured voltage of the capacitor, and the switching frequency modulator is applied to the charge control signal. Accordingly, the basic switching frequency in the switch included in the inverter of the CCM resonant converter is generated, and the switching frequency selector selects the basic switching frequency as the switching frequency of the switch when the measured capacitor voltage is smaller than the preset precision charging reference voltage, When the measured capacitor voltage is greater than the preset precision charging reference voltage, the preset precision charging frequency is selected as the switching frequency of the switch.