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This paper proposes a new bidirectional isolated LLC resonant converter, which is suitable for ultra-wide voltage gain range applications, such as electric vehicle charging systems. The inverter and rectifier of proposed topology both have two modes by reconfiguring different modulation schemes during bidirectional operation. This results in three voltage-gain ranges, allowing ultra-wide output voltage operation and narrow modulation frequency. The conversion ratio and resonant tank can be designed for only a quarter of the required output voltage range. Finally, the proposed topology and analysis are validated by experiments results obtained from the converter prototype built in the laboratory
Yu Zuo; Xuewei Pan; Can Wang. A Reconfigurable Bidirectional isolated LLC Resonant Converter for Ultra-Wide Voltage-gain Range applications. IEEE Transactions on Industrial Electronics 2021, PP, 1 -1.
AMA StyleYu Zuo, Xuewei Pan, Can Wang. A Reconfigurable Bidirectional isolated LLC Resonant Converter for Ultra-Wide Voltage-gain Range applications. IEEE Transactions on Industrial Electronics. 2021; PP (99):1-1.
Chicago/Turabian StyleYu Zuo; Xuewei Pan; Can Wang. 2021. "A Reconfigurable Bidirectional isolated LLC Resonant Converter for Ultra-Wide Voltage-gain Range applications." IEEE Transactions on Industrial Electronics PP, no. 99: 1-1.
In the research of the high-speed sensorless control strategy of an interior permanent-magnet synchronous motor (IPMSM), considering the harmonic influence of inverter nonlinearity on traditional sliding mode observer method, a full-order sliding mode observer (SMO) method based on synchronous frequency tracking filtering is proposed. This method avoids the phase delay defects caused by the use of filters in traditional second-order SMO. Then, the observed extended electromotive force (EMF) signal is filtered using a synchronous frequency tracking (SFT) function. It tracks the changing stator current and filters out harmonics that are not part of the tracking signal to achieve static tracking of the stator current. Then, the rotor speed can be estimated by a Luenberger-based observer. Experimental results verify the effectiveness and feasibility of the proposed method.
Danyang Bao; Huiming Wu; Ruiqi Wang; Fei Zhao; Xuewei Pan. Full-Order Sliding Mode Observer Based on Synchronous Frequency Tracking Filter for High-Speed Interior PMSM Sensorless Drives. Energies 2020, 13, 6511 .
AMA StyleDanyang Bao, Huiming Wu, Ruiqi Wang, Fei Zhao, Xuewei Pan. Full-Order Sliding Mode Observer Based on Synchronous Frequency Tracking Filter for High-Speed Interior PMSM Sensorless Drives. Energies. 2020; 13 (24):6511.
Chicago/Turabian StyleDanyang Bao; Huiming Wu; Ruiqi Wang; Fei Zhao; Xuewei Pan. 2020. "Full-Order Sliding Mode Observer Based on Synchronous Frequency Tracking Filter for High-Speed Interior PMSM Sensorless Drives." Energies 13, no. 24: 6511.
Short-circuit faults are the most critical failure mechanism in power converters. Among the various short-circuit protection schemes, desaturation protection is the most mature and widely used solution. Due to the lack of gate driver integrated circuit (IC) with desaturation protection for the silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET), the conventional insulated gate bipolar transistor (IGBT) driver IC is normally used as these two devices have similar gate structure and driving mechanism. In this work, a gate driver with desaturation protection is designed for the 1.2-kV/30-A SiC MOSFET and silicon (Si) IGBT with the off-the-shelf driver IC. To further limit voltage-overshoot at the rapid turn-off transient, the active clamping circuit is introduced. Based on the experiments of switching characterization and short-circuit test, the SiC MOSFET shows faster switching speed, more serious electromagnetic interference (EMI) issue, lower switching loss (half), and higher short-circuit current (1.6 times) than the Si IGBT, even with a slower gate driver. Thus, a rapid response speed is required for the desaturation protection circuit of SiC MOSFET. Due to the long delay time of the existing desaturation protection scheme, it is technically difficult to design a sub- μ s protection circuit. In this work, an external current source is proposed to charge the blanking capacitor. A short-circuit time of 0.91 μ s is achieved with a reliable protection. Additionally, the peak current is reduced by 22%.
Shan Yin; Yingzhe Wu; Yitao Liu; Xuewei Pan. Comparative Design of Gate Drivers with Short-Circuit Protection Scheme for SiC MOSFET and Si IGBT. Energies 2019, 12, 4546 .
AMA StyleShan Yin, Yingzhe Wu, Yitao Liu, Xuewei Pan. Comparative Design of Gate Drivers with Short-Circuit Protection Scheme for SiC MOSFET and Si IGBT. Energies. 2019; 12 (23):4546.
Chicago/Turabian StyleShan Yin; Yingzhe Wu; Yitao Liu; Xuewei Pan. 2019. "Comparative Design of Gate Drivers with Short-Circuit Protection Scheme for SiC MOSFET and Si IGBT." Energies 12, no. 23: 4546.
A power factor correction (PFC) converter with interleaved multi-channel topology is gaining increasing attention due to its ability in reducing input and output current ripples, but an Electromagnetic Interference (EMI) noise filter is still required for suppressing the large high-frequency switching noise that could potentially degrade the input power quality of the supplying grid and cause malfunctions to other grid-connected systems. In this paper, a magnetic modeling of an interleaved PFC converter with an input differential mode (DM) EMI filter has been successfully implemented, which considers the nonlinear behavior of the inductive component in the EMI filter. The Jiles-Atherton (J-A) model is applied to describe the filtering inductor whose core displays saturation and hysteresis. The simulation results are verified with the experimental test.
Yitao Liu; Shan Yin; Xuewei Pan; Huaizhi Wang; Guibin Wang; Jianchun Peng. Effects of Nonlinearity in Input Filter on the Dynamic Behavior of an Interleaved Boost PFC Converter. Energies 2017, 10, 1530 .
AMA StyleYitao Liu, Shan Yin, Xuewei Pan, Huaizhi Wang, Guibin Wang, Jianchun Peng. Effects of Nonlinearity in Input Filter on the Dynamic Behavior of an Interleaved Boost PFC Converter. Energies. 2017; 10 (10):1530.
Chicago/Turabian StyleYitao Liu; Shan Yin; Xuewei Pan; Huaizhi Wang; Guibin Wang; Jianchun Peng. 2017. "Effects of Nonlinearity in Input Filter on the Dynamic Behavior of an Interleaved Boost PFC Converter." Energies 10, no. 10: 1530.