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Non-isolated Weinberg Converter is suitable for battery discharge regulator due to the advantages of continuous current, no RHP zeroes and high efficiency. The working principle under overlap and non-overlap modes with stray parameters is analyzed in this paper. In order to estimate the heat distribution, the power loss is calculated and the trend of change in efficiency is achieved. In addition,...
Due to the structural design of the traditional matrix converter, the voltage transfer ratio is limited to 0.866. In this paper, we purposed a new one-step boost type matrix converter, which can change the voltage transfer ratio variable from the perspective of changing the topological structure. The topological structure of one-step boost type matrix converter not only improved the voltage transfer...
DC contactor is one of the key equipment in DC rail traction system. This paper proposes a 2 kV hybrid DC contactor based on natural current transfer. The topology consists of mechanical switch, solid-state switch, passive RCD circuits for snubber and dynamic voltage balancing, and MOV for absorption. Transient characteristics of current transfer, snubber and absorption are studied by theoretical...
Two maximum-torque-per-ampere (MTPA) algorithms for an interior permanent magnet synchronous motor (IPMSM) drive are presented in this paper. The proposed MTPA algorithms include an improved virtual signal injection control (VSIC) and a direct-search control. Compared to the original VSIC, the improved VSIC can be more accurate. Additionally, the comparison of two MTPA algorithms is given, including...
This paper presents an online adaline neural network (ANN) based identification method for estimating the dq-axis inductances of interior permanent magnet synchronous machine (IPMSM). This method only needs to sample the phase currents, bus voltage, rotor position angle and speed without any design parameters. In the proposed estimation, the rotor flux linkage and the stator winding resistance are...
Stacked boost converter (SBC) is widely adopted in aerospace applications because of the superiority of high efficiency, continuous current and easily controlled system. In the SBC with three-capacitor, the resonance of the stray inductance of stacked branch and output capacitors worsen the closed-loop input impedance and audio susceptibility. In order to eliminate the resonance, three-capacitor is...
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