Wei Hua (花为)

Wei Hua (花为)

Southeast University

H-index: 56

Asia-China

About Wei Hua (花为)

Wei Hua (花为), With an exceptional h-index of 56 and a recent h-index of 40 (since 2020), a distinguished researcher at Southeast University, specializes in the field of Electrical Machines.

His recent articles reflect a diverse array of research interests and contributions to the field:

Current Ripple Sampling based Angle Error Compensation for High-speed Permanent Magnet Synchronous Motor Sensorless Control Considering Inductance Saturation

Robust Diagnosis of Partial Demagnetization Fault in PMSMs Using Radial Air-Gap Flux Density Under Complex Working Conditions

Modified magnetic equivalent circuit of double‐stator single‐rotor axial flux permanent magnet machine considering stator radial‐end flux‐leakage

Force-balancing magnetic bearing with adjustable bias magnetic field for stator permanent magnet motor

Relationship between Slot-Pole Combination and Performance of Partitioned-Stator Field-Excitation Brushless Machines by Air-Gap Field Modulation Principle

Elastic Modulus Adjustment Method of Double-Stator HTS Field Modulated Machine Based on Entire Machine Modal Analysis

Reliability-Based Robust Optimization of High-Speed PM Synchronous Machine with Local Surrogate Model Strategy

Feedforward PLLs for Motor Position Estimation using Embedded Magnetic Encoder

Wei Hua (花为) Information

University

Southeast University

Position

Schoolf of Electrical Engineering

Citations(all)

12489

Citations(since 2020)

6541

Cited By

7821

hIndex(all)

56

hIndex(since 2020)

40

i10Index(all)

252

i10Index(since 2020)

164

Email

University Profile Page

Southeast University

Wei Hua (花为) Skills & Research Interests

Electrical Machines

Top articles of Wei Hua (花为)

Current Ripple Sampling based Angle Error Compensation for High-speed Permanent Magnet Synchronous Motor Sensorless Control Considering Inductance Saturation

Authors

Yinfeng Hu,Wei Hua,Mingjin Hu,Yuchen Wang

Journal

IEEE Transactions on Power Electronics

Published Date

2024/3/22

Online parameter identification of high-speed permanent magnet synchronous machine (HSPMSM) has been studied extensively neglecting magnetic saturation. However, at heavy load condition, the difference between apparent inductance and incremental inductance generally exists, which will introduce a potential error in rotor position estimation for sensorless control. Unfortunately, previous research on HSPMSMs has not sufficiently investigated the angle error caused by this saturation. To address this issue, the influence of inductance mismatch on rotor position estimation is analyzed where the inductance error is found proportional to the estimated rotor position error. This analysis provides a potential conversion from apparent inductance identification, which is based on integral armature flux linkage, to a simpler non-integral angle error estimation. Consequently, a current-ripple-sampling (CRS) based …

Robust Diagnosis of Partial Demagnetization Fault in PMSMs Using Radial Air-Gap Flux Density Under Complex Working Conditions

Authors

Wang He,Jun Hang,Shichuan Ding,Le Sun,Wei Hua

Journal

IEEE Transactions on Industrial Electronics

Published Date

2024/1/22

Partial demagnetization fault (PDF) is a common problem for permanent magnet synchronous motor (PMSM). The PMSM usually operates under complex working conditions (dynamic speed and various load), leading to the difficulty in robust PDF diagnosis. Hence, how to reliably and accurately diagnose PDF under complex working conditions has become a key issue in ensuring its safe operation. To address this issue, a robust PDF diagnosis method for PMSM is proposed based on radial air-gap flux density in this article. First, the d -axis magnetic network model of PMSM is established to extract the fault feature from the radial air-gap flux density. Then, by subtracting the offline-calculated radial air-gap flux density of stator current excitation from the online measured value, the open-circuit radial air-gap flux density can be calculated. Next, the equiangular interval resampling method is used to obtain the open …

Modified magnetic equivalent circuit of double‐stator single‐rotor axial flux permanent magnet machine considering stator radial‐end flux‐leakage

Authors

Jixuan Chen,Wei Hua,Lingyun Shao,Zhongze Wu,Xueyi Yan,Wentao Zhang

Journal

IET Electric Power Applications

Published Date

2024/2

A modified non‐linear magnetic equivalent circuit (MEC) model is presented for double‐stator single‐rotor axial flux permanent magnet (AFPM) (DSSR‐AFPM) machine considering stator radial‐end flux‐leakage, which is severer under a heavier load. Compared to the conventional MEC model for DSSR‐AFPM machine, the proposed model can predict the electromagnetic performance more accurately when the machine operates under a heavy load. The proposed MEC model is verified by the finite element analysis (FEA) on a 24‐slot/20‐pole DSSR‐AFPM machine. The comparison results show that the relative error between the proposed MEC model and FEA is <4% for back electromotive force and <5% for average electromagnetic torque, respectively. Specifically, the relative error of the average torque for the modified MEC model is 4.92% at 28.30 Arms/mm2 slot current density, which is lower than the …

Force-balancing magnetic bearing with adjustable bias magnetic field for stator permanent magnet motor

Published Date

2024/2/20

A force-balancing magnetic bearing with an adjustable bias magnetic field for a stator permanent magnet motor is provided. The force-balancing magnetic bearing includes four permanent magnetic poles and four electromagnetic poles, wherein a magnetic field energy of the four permanent magnetic poles is sourced from a stator permanent magnet of the stator permanent magnet motor, each permanent magnetic pole is formed by a left permanent-magnet magnetic bridge, a right permanent-magnet magnetic bridge, a magnetic adjusting section, an electromagnetic pole stator, an electromagnetic pole and permanent magnetic pole isolation plate, a permanent-magnet two-side magnetic pole connection section, a left permanent-magnet magnetic pole and a right permanent-magnet magnetic pole, a magnetic flux of each permanent magnetic pole is adjusted by the magnetic adjusting section, and the four …

Relationship between Slot-Pole Combination and Performance of Partitioned-Stator Field-Excitation Brushless Machines by Air-Gap Field Modulation Principle

Authors

Zhiheng Zhang,Wei Hua,Yubin Wang,Xianglin Li,Xinkai Zhu,Ming Cheng

Journal

IEEE Transactions on Transportation Electrification

Published Date

2024/3/20

In this article, the relationship between slot-pole combination and electromagnetic performance of a partitioned-stator field-excitation (PS-FE) brushless machine is analyzed by air-gap field modulation principle (AFMP). Firstly, the air-gap field modulation process of two PS-FE machines is investigated with the inner stator pole number Ni /rotor pole number Nr /outer stator slot number No of 8/18/42 and 12/10/12 respectively, and verified by finite element analysis (FEA) and experiments. Then, a general combination (Rule-I), a deprecated combination (Rule-II) and a compensatory combination (Rule-III) are defined to guide the slot-pole selection. It is found that if Nr is an integer multiple of Ni /2 (i.e. the inner stator pole pairs number pi ), the air-gap flux-densities will contain only the integer multiple harmonics of pi , resulting in an asymmetric flux-linkage and a back-electromotive force (back-EMF) in the armature …

Elastic Modulus Adjustment Method of Double-Stator HTS Field Modulated Machine Based on Entire Machine Modal Analysis

Authors

Yubin Wang,Chuntong Song,Zhiheng Zhang,Wei Hua

Journal

IEEE Access

Published Date

2024/1/16

The double stator high-temperature superconducting field modulated (DS-HTS-FM) machine with a dual-stator configuration and high-temperature superconducting materials includes numerous cryogenic components that establish the required operating temperature for superconducting magnets. This abundance of cryogenic elements introduces complexity to the process of conducting a modal analysis of the entire machine. However, the conventional trial-and-error approach employed to achieve precise modal analysis results for the entire-machine suffers from the drawback of lacking a clear direction for adjustment elastic modulus which has a great influence on the modal analysis results. Therefore, it is difficult to obtain accurate modal analysis results of the entire-machine. In response to this challenge, this study focuses on a 10 kW DS-HTS-FM machine as its subject and presents an elastic modulus …

Reliability-Based Robust Optimization of High-Speed PM Synchronous Machine with Local Surrogate Model Strategy

Authors

Yuanhao Du,Jialei Gu,Hengliang Zhang,Wei Hua

Journal

IEEE Transactions on Transportation Electrification

Published Date

2024/1/30

A comprehensive study on reliability-based robust optimization (RBRDO) of high-speed permanent magnet synchronous machine (HSPMSM) is presented in this paper. To ease the computation burden due to robustness analysis in objectives for large scale optimization, this paper considers constraints and objective functions comprehensively. Polynomial chaos Chebyshev interval (PCCI) method is adopted to convert the influence of uncertainties on machine performances into analytical expressions, meanwhile, the weight index Monte Carlo analysis (WMCA) method is used to improve the efficiency of reliability calculation in constraints. Both collocation points in PCCI and sample points in WMCA are obtained by Kriging model with local surrogate strategy to shorten the optimization time. A design example of HSPMSM is investigated and optimization results based on traditional deterministic design optimization …

Feedforward PLLs for Motor Position Estimation using Embedded Magnetic Encoder

Authors

Yuchen Wang,Hafiz Ahmed,Hengliang Zhang,Wei Hua

Journal

IEEE Sensors Journal

Published Date

2024/2

The encoder and resolver are commonly used rotor angle position sensors for controlling permanent magnet synchronous motors (PMSMs). However, they require significant axial space. This issue can be avoided with an embedded magnetic encoder (EME), which offers precise rotor angle estimation using a few linear Hall sensors in the motor cavity while occupying less space. Conventional Type-2 (i.e., proportional-integral loop filter) synchronous reference frame (SRF) phase-locked loop (PLL) can estimate phase and frequency from the measured Hall signals. However, the ramp frequency input during motor speed acceleration/deceleration causes dc phase error in the estimated angle. Type-3 (i.e., proportional-integral-acceleration loop filter) SRF-PLL can mitigate this issue but faces instability problems. In this article, two small-signal equivalent quasi Type-1 (i.e. proportional only loop filter) SRF-PLLs are …

High-Precision Injection Current Sampling Scheme for Direct Drive Low-Speed Position Sensorless Control of Switched Reluctance Machine

Authors

Xiaoqiang Guo,Shuanggui Zeng,Rui Zhong,Wei Hua

Journal

IEEE Transactions on Industrial Electronics

Published Date

2024/3/8

In cost-sensitive applications, the controller usually creates great noise that affects the current sampling accuracy. In this article, based on the conventional direct drive low-speed position sensorless control of switched reluctance machine (SRM), a high-precision injection current sampling scheme is proposed to improve the current sampling accuracy and thus the commutation position accuracy. First, the errors in the conventional current sampling are analyzed quantitatively. Second, aiming at reducing the current sampling noise, a dual-channel current sampling circuit is proposed to improve the current sampling accuracy. Third, a pulse current peak value prediction method based on the curve intersection method is proposed, so the error caused by discrete sampling can be reduced. Finally, the experimental setup is established and experiments under both the steady-state and transient-state are conducted, which …

Influence of Manufacturing Tolerance in Ring Magnet on Cogging Torque of Surface Permanent Magnet Synchronous Machine

Authors

Jinwen Du,Rui Zhong,Zhongze Wu,Wei Hua

Journal

IEEE Transactions on Energy Conversion

Published Date

2024/1/9

Small-size surface permanent magnet (SPM) synchronous machines with ring magnet are widely used due to their compact size, low cost, and ease of assembly. However, the manufacturing tolerance of ring magnet can significantly increase cogging torque in SPM machines, making it challenging for machine designers to reduce cogging torque during mass production. This paper presents an in-depth analysis of the mechanism of cogging torque influenced by manufacturing tolerance based on the co-energy method. Theoretical derivation and finite element (FE) analysis have shown that the cogging torque of a Q -slot/2 p -pole SPM machine with a ring magnet is mainly caused by the nQ th ( n = 1,2,3…) harmonics of the squared magnetic field of the ring magnet. Therefore, a simple quality index is proposed to suppress the cogging torque before assembling the ring magnet into an SPM machine, which is …

Power generation device and method based on time-varying magductance principle

Published Date

2024/1/25

A power generation device and method based on the time-varying magductance principle relate to the field of energy conversion, and in particular relate to an electromagnetic induction power generation device. The power generation device includes an electric energy generation unit, a power conversion unit and an electric energy storage unit. The electric energy generation unit includes a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux. By changing a magductance parameter of the time-varying magductance component, the time-varying magductance component generates induced current. The power conversion unit consists of a switching device and a circuit. The electric energy generated by the time-varying magductance component can be stored into the electric energy storage unit through controlling the switching device. The …

Cooperative Adaptive Command Filtered Backstepping Control for EVs to UPS-Microgrid via Virtual Synchronous Generator

Authors

Dezhi Xu,Lianqing Tang,Bin Jiang,Tinglong Pan,Jianxing Liu,Wei Hua

Journal

IEEE Transactions on Cybernetics

Published Date

2024/2/15

Multiple batteries in uninterruptible power supply (UPS)-microgrid systems based on multiagents composed of multiple electric vehicles (EVs) can encounter state of charge (SoC) consistency problems. To solve this differential expansion and controller saturation problem, an adaptive command filter sliding-mode control strategy based on virtual synchronous generators (VSGs) and considering the power allocation principle is proposed. First, based on directed graph theory, an SoC consistency algorithm and power allocation strategy for multiple EVs were proposed, forming a dc power system with a fixed communication topology. Second, the rotor motion equation of synchronous generator (SG) is introduced into the inverter control algorithm to form the mathematical model of VSG. Third, a low-pass filter (LFP) was introduced in the voltage control process to simulate the excitation attenuation characteristics of the …

A triple 3-phase fault-tolerant fractional slot concentric winding interior permanent-magnet machine with low space harmonics

Authors

Bo Wang,Zihan Wei,Haoyuan Yu,Xiao Chen,Ming Cheng,Wei Hua

Journal

Electrical Engineering

Published Date

2024/3/5

Fractional slot concentric winding (FSCW) machine features with short end winding, high torque density and good fault tolerance. However, this type of machine suffers from abundant MMF harmonics which causes high iron loss and partial saturation, etc. Hence, majority of the FSCW adopts surface-mounted PM (SPM) rotor which have large effective airgap to minimize the influence of the MMF harmonics while the interior PM (IPM) rotor is rarely used. The SPM rotor tends to induce high PM flux linkage and cause large fault current when experiencing a short-circuit failure. As a result, this paper presents a triple 3-phase FSCW-IPM for fault-tolerant applications. The triple 3-phase windings facilitate the uninterrupted fault tolerant operation, the more even distributed windings also induce a more sinusoidal MMF which enables the application of IPM rotor. The IPM rotor reduces the PM usage while reluctance torque …

An end-cloud collaboration approach for state-of-health estimation of lithium-ion batteries based on bi-LSTM with collaboration of multi-feature and attention mechanism

Authors

Pengchang Jiang,Tianyi Zhang,Guangjie Huang,Wei Hua,Yong Zhang,Wentao Wang,Tao Zhu

Published Date

2024/1/8

This study develops an end-cloud collaboration method for estimating the State-of-Health (SOH) of batteries. It fuses a cloud-based deep learning model for detailed analysis and an end-side model for swift evaluation, employing Bidirectional Long Short Term Memory networks and an attention mechanism for precise feature identification. A comprehensive feature extraction methodology, incorporating incremental capacity and differential thermal analyses, ensures robust correlation with battery degradation. The Extended Kalman Filter integrates these models, providing accurate and timely SOH estimations. Tested against NASA’s dataset, the method achieved SOH estimation with errors around 1%, suggesting potential for real-time battery health monitoring and broader multi-state estimation applications.

Comprehensive HFSVI-Based Sensorless Control Method for Dual Three-Phase Motor Considering Multiple Open-Circuit Faults

Authors

Zheng Wu,Wei Hua,Chenwen Cheng,Jinwen Du,Yuchen Wang

Journal

IEEE Transactions on Transportation Electrification

Published Date

2024/4/1

A robust sensorless control method requests an accurate rotor position estimation even under open-circuit faults. Thus, a comprehensive high-frequency (HF) square-wave voltage injection-based sensorless control method is proposed method by considering six types of single open-phase faults, twelve types of single open-switch faults, and fifteen types of double open-phase faults of dual three-phase interior permanent magnet motor. To decrease the scheme design complexity, the above thirty-three types of faults are classified into five new categories according to their effects on the HF response currents. Based on the specific fault classification, a signal reconstruction is proposed by combining HF currents in two subspaces to eliminate the effects of HF current distortion on the rotor position estimation. Since the coefficients of the signal reconstruction under five categories are different, a fault classification …

Core Loss Analysis of Flux Switching PM Machines with Toroidal Winding and Concentrated Winding by Field Modulation Theory

Authors

Peng Su,Yujia Xia,Guanlong Jia,Wei Hua,Yongjian Li

Journal

IEEE Transactions on Transportation Electrification

Published Date

2024/1/23

This paper investigates the influence of the winding configurations on the core flux density harmonics of the axial modular flux switching permanent magnet (AM-FSPM) and conventional FSPM machine. The relationships between air-gap flux density harmonics and stator-rotor core flux density harmonics of the AM-FSPM machine with toroidal winding and the FSPM machine with concentrated winding are derived based on the magnetic field modulation theory. Then, the core loss production mechanism of the two machines is revealed. Moreover, the armature reaction flux density harmonic amplitude ratio is proposed to represent the output torque and core loss of two machines. Thus, the efficiency trends of the two machines can be predicted at different working conditions, which is helpful in providing effective guidance on high-efficiency design. Further, the torque and core loss characteristics of the two machines …

An Improved Zero-Switching-Loss Inverter with Low Conduction Loss

Authors

Yun Liu,Huafeng Xiao,Wei Hua,Ming Cheng

Journal

IEEE Transactions on Power Electronics

Published Date

2024/2/6

Zero-Switching-Loss (ZSL) transformerless inverter (TLI) is beneficial for increasing switching frequency for distributed photovoltaic generation systems. However, existing ZSL-TLIs bear high conduction loss because of the coupling between the resonance tanks and the main power loops. In order to solve this problem, an improved zero-switching-loss H6 inverter (IZSL-H6) with low conduction loss composed of novel resonance tanks and H6 inverter has been proposed in this paper. The resonance tanks provide zero-current switching (ZCS) for H6 inverter switches, and the auxiliary devices of the resonance tanks are also turned on and off with ZCS. Compared with the existing ZSL-H6, IZSL-H6 reduces conduction loss by avoiding resonant current flow through the main switches during resonant capacitor charging mode and reducing the number of power devices in the main power loops during the freewheeling …

Magnetic Coupled Wireless Motor Driving Systems–An Overview

Authors

Jun Cai,Bin Li,Wei Hua,Adrian David Cheok,Ying Yan,Xin Zhang

Published Date

2024/3/4

Magnetic coupled wireless motor (MC-WM) drive technology embodies the deep integration of magnetic coupled wireless power transfer technology and motor drive technology, which is currently a forward-looking and challenging research direction in the field of motor system research. First, this article analyzes the basic operating mechanism of the MC-WM and classifies the topology design methods of the current MC-WM. Moreover, a systematic analysis and evaluation of the research status of wireless driving topology as well as the control methods for different types of motors is conducted. Especially, the construction methods of MC-WM without controllers or active switches in the motor side are discussed. Finally, the research challenges and development trends of MC-WM are addressed.

Analysis and improvement of DC winding current dynamics in wound field switched flux machine

Authors

Wentao Zhang,Zhongze Wu,Ying Fan,Wei Hua,Ming Cheng

Journal

IEEE Transactions on Industry Applications

Published Date

2024/3/25

In this paper, a hybrid voltage control strategy is proposed to improve the DC winding current dynamics for a 24-stator-slot/10-rotor-pole wound field switched flux (WFSF) machine. Firstly, the DC winding current dynamics are analysed based on the mathematical model of the WFSF machine. It is found that the DC bus voltage of the DC winding is a crucial factor for the DC winding current dynamics. However, the steady state DC current harmonics and DC current reference tracking speed are one pair of tradeoff for the WFSF machine, which cannot be solved based on certain voltage control strategy. Then, the bipolar voltage control and the unipolar voltage control strategies are investigated and compared in this paper. Although the unipolar voltage control strategy has a much lower steady state DC winding current harmonic, the current decay speed is lower than the bipolar voltage control strategy, which can be a …

Mechanism and Characteristics of Cogging Torque in Surface-Mounted PMSM: A General Airgap Field Modulation Theory Approach

Authors

Jiawei Zhou,Ming Cheng,Wei Hua,Wenfei Yu,Zhengzhou Ma,Chenchen Zhao

Journal

IEEE Transactions on Industrial Electronics

Published Date

2024/1/23

In this article, the surface-mounted permanent magnet machine is regarded as a salient pole reluctance machine to take into account the effect of stator teeth. The field modulation behavior of the magnetizing field is firstly introduced, and the field model is then derived using the general airgap field modulation theory (GAFMT). The properties of the modulated field harmonics are explored based on the proposed field model. Subsequently, a general cogging torque model based on the virtual work method and the GAFMT is proposed to describe the relationship between the field harmonics and the cogging torque. On this basis, the mechanism of the cogging torque is studied, its frequency, effective field harmonics, and the contribution of each harmonic are revealed. The proposed model is then validated by comparing its results with those obtained from the Maxwell Stress Tensor method and the finite-element …

See List of Professors in Wei Hua (花为) University(Southeast University)

Wei Hua (花为) FAQs

What is Wei Hua (花为)'s h-index at Southeast University?

The h-index of Wei Hua (花为) has been 40 since 2020 and 56 in total.

What are Wei Hua (花为)'s top articles?

The articles with the titles of

Current Ripple Sampling based Angle Error Compensation for High-speed Permanent Magnet Synchronous Motor Sensorless Control Considering Inductance Saturation

Robust Diagnosis of Partial Demagnetization Fault in PMSMs Using Radial Air-Gap Flux Density Under Complex Working Conditions

Modified magnetic equivalent circuit of double‐stator single‐rotor axial flux permanent magnet machine considering stator radial‐end flux‐leakage

Force-balancing magnetic bearing with adjustable bias magnetic field for stator permanent magnet motor

Relationship between Slot-Pole Combination and Performance of Partitioned-Stator Field-Excitation Brushless Machines by Air-Gap Field Modulation Principle

Elastic Modulus Adjustment Method of Double-Stator HTS Field Modulated Machine Based on Entire Machine Modal Analysis

Reliability-Based Robust Optimization of High-Speed PM Synchronous Machine with Local Surrogate Model Strategy

Feedforward PLLs for Motor Position Estimation using Embedded Magnetic Encoder

...

are the top articles of Wei Hua (花为) at Southeast University.

What are Wei Hua (花为)'s research interests?

The research interests of Wei Hua (花为) are: Electrical Machines

What is Wei Hua (花为)'s total number of citations?

Wei Hua (花为) has 12,489 citations in total.

What are the co-authors of Wei Hua (花为)?

The co-authors of Wei Hua (花为) are Zhe Chen, Ming Cheng(程明), Wenxiang Zhao (赵文祥), Zhongze Wu, Jianning Dong (董剑宁), ruiwu cao(曹瑞武).

    Co-Authors

    H-index: 91
    Zhe Chen

    Zhe Chen

    Aalborg Universitet

    H-index: 77
    Ming Cheng(程明)

    Ming Cheng(程明)

    Southeast University

    H-index: 53
    Wenxiang Zhao (赵文祥)

    Wenxiang Zhao (赵文祥)

    Jiangsu University

    H-index: 27
    Zhongze Wu

    Zhongze Wu

    Southeast University

    H-index: 26
    Jianning Dong (董剑宁)

    Jianning Dong (董剑宁)

    Technische Universiteit Delft

    H-index: 25
    ruiwu cao(曹瑞武)

    ruiwu cao(曹瑞武)

    Nanjing University of Aeronautics and Astronautics

    academic-engine

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