Analysis and Design of a New Current-Source Output Load Resonant Converter With High Capability in Line and Load Regulation

摘要: In this paper a fourth-order Passive Resonant Tank (PRT) is introduced using topological modification in LLC tank for current-source output applications of Load Converters (LRCs). The design procedure based on the current/input voltage ratio decoupling from load coefficient. Therefore, current can be independent variation topologically. condition, new criterions are applied operational frequency and PRT components ratio. Moreover, kVA/kW LRC considered as comparing index, to optimize converter size well reduction voltage/current stresses components. To reduce discrete number, transformer parasitic inductances bridge capacitors used Also, simple accurate PWM-based Quasi-Proportional Controller (QPC) designed maintain constant against input variations. Minimum reactive power, low circulating turn-off current, ZVS inverter switches wide loads range obtained advantages LLCC-LRC. sinusoidal shape minimum switching losses rectifier maintained. Finally, an experimental prototype with 3.5A 93.9% efficiency presented results verification.