Yang Lu

Abrupt Step-Size Transition in High-Power Traction Systems

Mengjia Zhang, Jian Li, Yang Lu, Zhen Guo et autres

In high-power traction systems, synchronous modulation is typically employed due to limitations on switching frequency. As the rotational speed increases, the system undergoes switching of frequency division ratios, leading to abrupt changes in the sampling frequency. This study establishes the Internal Model …

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Giant enhancement of the Goos-Hänchen shift by hyperbolic shear polaritons with beta-phase Ga2O3 in the mid-infrared spectrum

Yang Lu, Xiongwen Chen, Chang Liu, Xinwu Liu et autres

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Research on LeakGAN-Based Text Augmentation Technology for Transformer State Assessment

Yang Song, Kai Chen, Xiaodong Liu, Hao Qin et autres

With the rapid increase in the proportion of renewable energy generation in power grids, the operational environment of electrical equipment has become increasingly complex, making accurate state assessment of critical devices such as transformers crucial for ensuring power system stability. However, the …

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Multi-Waveguide Pinching Antennas for ISAC

Yang Lu, Yanqing Xu, Bo Ai, Octavia A. Dobre et autres

Recently, a novel flexible-antenna technology, called pinching antennas, has attracted growing academic interest. By inserting discrete dielectric materials, pinching antennas can be activated at arbitrary points along waveguides, allowing for flexible customization of large-scale path loss. This paper investigates a multi-waveguide pinching-antenna …

Restart Strategy for Sensorless Control of Permanent Magnet Synchronous Motor in Flux-Weakening Region

Fei Du, Liu Zheng, Jian Li, Yang Lu et autres

In railway transportation applications, especially during the transition through neutral sections, it is necessary for the motors to restart at specific speeds. For permanent magnet synchronous motors (PMSMs) operating in the flux-weakening region, this presents a significant challenge with sensorless control strategies …

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Dynamic response and damage collapse of bridge subjected to debris flow impacts using coupled Eulerian Lagrangian method

Jian Fan, Zhifeng Wu, Chunyang Gao, Yang Lu et autres

The coupled Eulerian Lagrangian (CEL) fluid–structure interaction method was employed to study the bridge’s dynamic behaviour under debris flow. The accuracy of the numerical simulations using the CEL method was confirmed by comparing them with small-scale experimental results for debris flow impacting …

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Torque Quality Optimization of Combined-Halbach Array AFPMM with Asymmetric Skewed Poles Based on SMPSO Algorithm

Yang Lu, Kai Yang, Zhichu Chen, Yanwen Zheng et autres

Due to its high torque density and compact structure, axial-flux permanent magnet machine (AFPMM) shows obvious advantages in direct drive and miniaturization. In order to further adapt the machine to the requirements and improve the performance, an asymmetric bidirectional skewed poles combined-Halbach …

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Electromagnetic Force Analysis of Short-circuit Faults in Transformer Windings Based on Fractional-order Models

Yang Lu, Long Zhang, Rui Zhang, Xiuyang Chen et autres

The global shift towards renewable energy has led to a significant increase in the renewable energy power generation industry. However, the unpredictable nature of renewable energy sources poses challenges for power systems, especially transformers. To better assess and analyze the condition of …

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Semi-Analytical Calculation of AC Copper Loss in Flat Wire Windings Considering PWM Harmonics

Longyu Guo, Yang Lu, Jian Li, Rong‐Jie Wang

This paper proposes an AC copper loss calculation method for flat wire windings of pulse width modulation (PWM) driven permanent magnet (PM) synchronous motors. To quickly account for the effect of high frequency current harmonics on the magnetic field and losses, a …

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Multi-Physics Design and Analysis of Axial Flux Permanent Magnet Motors for In-Wheel Direct-Drive

Shuiquan Qiu, Yang Lu, Jian Li

In this paper, a novel dual-rotor inner-stator axial flux permanent magnet vernier motor(AFPMVM) that utilizes stator teeth as magnetic field modulation components is investigated and analyzed for the in-wheel direct-drive applications. Two variations of this topology are implemented, featuring both a toroidal …

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Field Weakening Strategy Extended to Six-Step Operation for Dual Closed-Loop Current Control of Induction Motors

Zheng Zhou, Jian Li, Yang Lu, Hongwei Xu et autres

Six-step operation of induction motors (IMs) has many advantages such as reduced switching loss and fully utilized inverter output voltage. However, the system’s degree of freedom will be reduced to one in a six-step operation, which makes it difficult to maintain instantaneous …

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Direct Field-Oriented Control of Induction Motor With Discrete Full-Order Flux Observer

Qinpei Zhang, Jian Li, Yang Lu

The full-order flux observer has only been preliminarily applied in high-performance direct field orientation control (DFOC) of induction motors (IM). However, in high-power and high-speed motor drives, the control system operates under low switching-to-fundamental frequency ratio (SFR), so the full-order flux observer …

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