Xinkai Zhu

Electromagnetic design and analysis of a 20 MW modular dewar multiplexing high-temperature superconducting armature flux-reversal permanent magnet electrical machine

Runqian Li, Yonggang Li, Xinkai Zhu, Yaxin Yang et autres

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Impact of Torsional Vibration of Brushless Excitation Turbogenerator Shafting on the Parameters of Coaxial Exciter

Yucai Wu, Shuqiong Sun, Yuanyuan Kong, Xinkai Zhu et autres

The low-frequency oscillation of large generators poses great harm to the shaft system. In the case of brushless excitation turbogenerators, the oscillation will affect the coaxial exciter. In this article we focus on the impact of the low-frequency oscillation of large-scale generator …

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Electromagnetic Design and Analysis of a 20 MW Modular Dewar Multiplexing High-Temperature Superconducting Armature Flux-Reversal Permanent Magnet Electrical Machine

Runqian Li, Yong Li, Xinkai Zhu, Yaxin Yang et autres

Analysis of Short Circuit Characteristics of HTS Synchronous Condenser under Different Excitation Modes

Yiting Hu, Xinkai Zhu, Jiancheng Zhang, Ruofei Ding et autres

Design and Experimental Validation of a Multi-Unit Graded Quench Protection System for the Excitation Winding of a Superconducting Synchronous Condenser

Yaxin Yang, Xinkai Zhu, Shaoxuan Zhu, Jiancheng Zhang et autres

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Coordinate Transformation Based on Vector Magnetic Circuit Theory and Its Application in Sensorless Control of SPMSM

Xinkai Zhu, Changhao Song, Ming Cheng, Wei Qin et autres

The accuracy of mathematical model of surface-mounted permanent magnet synchronous motor (SPMSM) is critical for high-performance sensorless control. However, the eddy-current and hysteresis effects of the iron core are usually neglected in the existing SPMSM mathematical models, affecting control accuracy of the …

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Virtual Magnetic Core of "Come Out of Thin Air" for High Performance Electromagnetic Devices

Zhejun Luo, Wei Qin, Ming CHENG, Zheng Wang et autres

Design, analysis and test of the dual three-phase permanent magnet vernier superconducting armature electrical machine prototype

Xinkai Zhu, Minmin Li, Runqian Li, Zhiheng Zhang et autres

Abstract Offshore wind power generation has broad application prospects. The current single-unit capacity of offshore wind generators exceeds 20 MW. Superconducting (SC) armature permanent magnet (PM) generators have high current-carrying characteristics and can overcome the bottlenecks of the copper armature PM synchronous …

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Magnetic Shielding Performance Evaluation of Dewar System for High-Temperature Superconducting Machines

Peng Hu, Zhongyuan Zhou, Zhiheng Zhang, Wei Hua et autres

For high-temperature superconducting-based electrical machines, the magnetic shielding performance of Dewar system has become one of the most attractive research topics in electromagnetic compatibility (EMC) practice and applications. The unknown or inaccurate knowledge about the electromagnetic properties of Dewar materials, as well …

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Mathematical Model and Vector Control of SPMSM Considering Eddy Current and Hysteresis Effects Based on Vector Magnetic Circuit Theory

Xinkai Zhu, Zhao Dajun, Wei Qin, Wei Hua

The traditional mathematical models of surface-mounted permanent magnet synchronous motor (SPMSM) usually ignore the influences of the eddy current and hysteresis effects due to the fact that there is no appropriate parameter to quantitatively characterize these effects. However, with the increase of …

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Rotor vibration analysis of off-grid PMSG considering axial eccentricity and load variability

Yuling He, Wen Zhang, De‐Rui Dai, Ming‐Xing Xu et autres

This paper presents a comprehensive investigation into the effects of key operational parameters under axial eccentricity (AE) on the mechanical behavior of the rotor in permanent magnet synchronous generators (PMSGs). The parameters studied include the degree of AE, load size, and power …

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AC Loss Analysis of Parallel Superconducting Coil Used in Multiphase Superconducting Armature Permanent Magnet Electrical Machine

Xinkai Zhu, Yupeng Zhao, Minmin Li, Runqian Li et autres

The phase current of mega watt (MW) class superconducting (SC) armature permanent magnet electrical machine (SCPMM) is quite high, usually from several hundred amperes to 1 kA, therefore, the current-carrying capacity of a single SC tape is insufficient to meet the phase …

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