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The eGaN HEMTs with ZVS technique have emerged in high frequency converters to reduce the switching loss. This paper investigates an eGaN HEMT ZVS isolated SEPIC converter running up to 2 MHz. Furthermore, an inductor optimization method is proposed to ensure ZVS and reduce reverse conduction loss of the SR. The efficiency curve is optimized based on the trade-off method between the switching and...
This paper presents a 3-phase dc-link capacitor RMS current reduction method by increasing paralleled inverter module number for segmented traction drive. Compared with the existing 2-module paralleled system, this paper investigates increasing paralleled module number can further reduce the value of dc-link capacitor RMS current. The results show that 2 paralleled modules can reduce ∼45% and 3 paralleled...
With off-line power supplies moving towards MHz switching frequency range, the converter's bus capacitor becomes the bottleneck of further improvement of power density. Partial constant power operation is effective in reducing the bus capacitance and capacitor current stress for low power applications. However, its impact on circuit operation and circuit design have not been studied thoroughly. With...
This paper shows a combinational decoupling method to minimize dc-bus capacitance and improve power density for DC to AC applications, especially for single-phase inverters. The proposed method is combined with in-series structure and in-parallel structure together with power equations analyzed. The detailed control strategy is given. The simulations are conducted via PLECS software to prove the theoretical...
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