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学者姓名：杨公德
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Abstract ：
This article investigates the generation mechanism of electromagnetic torque, particularly the reluctance torque in fractional slot concentrated winding (FSCW) V-type interior permanent magnet machine (V-IPM) machine. Based on the air-gap field modulation theory, the modulation process of the PM field and armature reaction field is elucidated by establishing a magnetomotive force (MMF) and permeance model considering the magnetic saturation of rotor magnetic bridge. Through analyzing the conditions for effective coupling of air-gap field harmonics, studying the time-domain modulation effect resulting from the magnetic saturation of rotor magnetic bridge, and establishing the mapping relationship between inductance harmonic and single-phase winding field harmonic, the generation mechanism of electromagnetic torque, including both the PM torque and reluctance torque in FSCW V-IPM machine, is first revealed. Then, a harmonic restoration method based on frozen permeability is adopted to quantitatively analyze the contribution of the armature reaction MMF harmonics to the PM torque and reluctance torque. Moreover, the reluctance torque ratio, defined as the ratio of reluctance torque to electromagnetic torque, is additionally presented from the aspect of armature reaction MMF harmonics. Finally, the analysis is verified numerically by an exist well-developed FSCW V-IPM machine.
Keyword ：
Armature Armature Electrification Electrification Electromagnetics Electromagnetics Electromagnetic torque Electromagnetic torque Harmonic analysis Harmonic analysis magnetic saturation magnetic saturation PM torque PM torque reluctance torque reluctance torque Rotors Rotors Stator cores Stator cores Stator windings Stator windings time-domain modulation effect time-domain modulation effect Torque Torque Transportation Transportation Windings Windings
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| GB/T 7714 | Yang, Gongde , Li, Jie , Hua, Wei . Investigation of Electromagnetic Torque Generation Mechanism in FSCW V-IPM Machines Considering Magnetic Saturation [J]. | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION , 2025 , 11 (2) : 6428-6440 . |
| MLA | Yang, Gongde 等. "Investigation of Electromagnetic Torque Generation Mechanism in FSCW V-IPM Machines Considering Magnetic Saturation" . | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION 11 . 2 (2025) : 6428-6440 . |
| APA | Yang, Gongde , Li, Jie , Hua, Wei . Investigation of Electromagnetic Torque Generation Mechanism in FSCW V-IPM Machines Considering Magnetic Saturation . | IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION , 2025 , 11 (2) , 6428-6440 . |
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Abstract ：
This paper proposes a novel separated excitation axial field hybrid permanent magnet memory (SE-AFHPMM) machine with high torque density and excellent flux-adjustment capability. The topology and operating principle of the proposed machine are presented. Comparisons are made on the machine with different slot/rotor pole combinations in terms of torque capacity and flux-adjustment capability by 3-D finite element analysis. It is found that higher torque density and better flux-adjustment capability can be achieved by the proposed 12/10 machine. Moreover, the PM torque is the primary component of the output torque in the flux-enhanced state, whereas in the flux-weakened state, the reluctance torque exhibits an important role and becomes the main component of the output torque. Finally, to evaluate the contribution of different PMs to the output torque, frozen permeability method is used to separate PM torque components for both types of PMs. The results reveal that the torque contributed by the AlNiCo of the 12/10 SE-AFHPMM machine is the largest in the total output torque, which is suitable for various magnetization occasions.
Keyword ：
Coils Coils Flux-adjustment capability Flux-adjustment capability frozen permeability method frozen permeability method Magnetization Magnetization memory machine memory machine Rotors Rotors separated excitation separated excitation slot/rotor pole combination slot/rotor pole combination Stator windings Stator windings Topology Topology Torque Torque Windings Windings
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| GB/T 7714 | Rao, Fei , Yang, Gongde . Torque Performance and Flux-Adjustment Capability Analysis of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Machine [J]. | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY , 2024 , 34 (8) . |
| MLA | Rao, Fei 等. "Torque Performance and Flux-Adjustment Capability Analysis of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Machine" . | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 34 . 8 (2024) . |
| APA | Rao, Fei , Yang, Gongde . Torque Performance and Flux-Adjustment Capability Analysis of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Machine . | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY , 2024 , 34 (8) . |
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To reduce the computation and complexity of traditional multi-vector model predictive current control (MPCC) algorithm and ensure good control performance, a novel multi-vector MPCC algorithm was proposed to quickly screen the second voltage vector. According to the principle of current non-differential beat control, the d and q-axis current decision factors were defined by the d and q-axis current difference, which simplifies the selection process of the second voltage vector, reduces the calculation of the control chip, and maintains the advantage of low current ripple. On the basis of the new two-vector MPCC algorithm, a novel three-vector MPCC algorithm combining the d and q-axis current decision factors and the effective voltage vector table to directly select the second voltage vector was proposed. Experimental results were presented showing that the new multi-vector MPCC algorithm maintains the control performance of the traditional multi-vector MPCC algorithm while the computation of the new two-vector MPCC algorithm is reduced by 33. 96% and the computation of the new three-vector MPCC algorithm is reduced by 48. 7% . © 2024 Editorial Department of Electric Machines and Control. All rights reserved.
Keyword ：
Electric current control Electric current control Permanent magnets Permanent magnets Synchronous motors Synchronous motors Vectors Vectors
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| GB/T 7714 | Yan, Chaobin , Yang, Gongde , Yang, Mingfa . New model predictive current control of permanent magnet synchronous motor [J]. | Electric Machines and Control , 2024 , 28 (5) : 91-100 . |
| MLA | Yan, Chaobin 等. "New model predictive current control of permanent magnet synchronous motor" . | Electric Machines and Control 28 . 5 (2024) : 91-100 . |
| APA | Yan, Chaobin , Yang, Gongde , Yang, Mingfa . New model predictive current control of permanent magnet synchronous motor . | Electric Machines and Control , 2024 , 28 (5) , 91-100 . |
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To solve the problems of the traditional memory motor,such as low torque density and space conflict between armature winding and excitation winding,combined with the axial field permanent magnet motor,a novel axial field hybrid permanent magnet memory (AFHPMM)motor is proposed. The motor excited by both NdFeB and AlNiCo utilizes the stator separation structure to achieve wide speed range and high torque density. In order to analyze the contribution of different permanent magnets (PMs)to the output torque of the novel motor and solve the problem that the traditional frozen permeability method (FPM)cannot accurately separate the electromagnetic torque,a new FPM is proposed and the separation results of the two methods are compared and analyzed. The results show that the separation accuracy of the new torque separation method is always higher than that of the traditional torque separation method under different magnetization states,and the relative error between the new method and the finite element calculation is always less than 5% . The relative error between the new torque separation method and the finite element calculation results is only 0. 94% in the forward fully magnetized state. It is proved that the proposed torque separation method can achieve the precise separation of electromagnetic torque in the novel memory motor. © 2024 Southeast University. All rights reserved.
Keyword ：
Aluminum alloys Aluminum alloys Cobalt alloys Cobalt alloys Electric motors Electric motors Finite element method Finite element method Iron alloys Iron alloys Neodymium alloys Neodymium alloys Permanent magnets Permanent magnets Stators Stators Ternary alloys Ternary alloys Torque Torque Winding Winding
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| GB/T 7714 | Yang, Gongde , Rao, Fei , Lin, Mingyao . Accurate separation of electromagnetic torque for axial field hybrid permanent magnet memory motor [J]. | Journal of Southeast University (Natural Science Edition) , 2024 , 54 (3) : 730-737 . |
| MLA | Yang, Gongde 等. "Accurate separation of electromagnetic torque for axial field hybrid permanent magnet memory motor" . | Journal of Southeast University (Natural Science Edition) 54 . 3 (2024) : 730-737 . |
| APA | Yang, Gongde , Rao, Fei , Lin, Mingyao . Accurate separation of electromagnetic torque for axial field hybrid permanent magnet memory motor . | Journal of Southeast University (Natural Science Edition) , 2024 , 54 (3) , 730-737 . |
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Abstract ：
为提高"电机学"课程教学质量,将新型励磁分离型轴向磁场永磁电机的科研成果转化为教学资源,探索创新"电机学"课程教学模式.通过研究电机结构参数对新型电机性能影响,减小学生学习"电机学"课程的难度,提高学生学习兴趣.采用基于NSGA-Ⅱ的多目标优化算法获取最优电机电磁性能,拓宽了学生的专业理论知识.这种融合前沿科研成果的"电机学"课程教学操作简单、成本低廉,适合国内大部分院校开展.
Keyword ：
教学资源 教学资源 电机学 电机学 科研成果 科研成果
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| GB/T 7714 | 杨公德 , 饶飞 , 花为 . 研教融合在"电机学"教学中的实践 [J]. | 电气电子教学学报 , 2024 , 46 (4) : 103-107 . |
| MLA | 杨公德 等. "研教融合在"电机学"教学中的实践" . | 电气电子教学学报 46 . 4 (2024) : 103-107 . |
| APA | 杨公德 , 饶飞 , 花为 . 研教融合在"电机学"教学中的实践 . | 电气电子教学学报 , 2024 , 46 (4) , 103-107 . |
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为降低传统三矢量模型预测电流控制(TV-MPCC)算法的计算量,提高MPCC对永磁同步电机(PMSM)的控制效率,提出了快速选取最优电压矢量的改进TV-MPCC算法.通过判断该时刻输出电压矢量所在扇区,直接缩小开关矢量选取范围,快速选取了最优电压矢量,降低了控制算法的计算量.基于PMSM实验平台进行实验研究,结果验证了所提方法的有效性.
Keyword ：
三矢量 三矢量 模型预测电流控制 模型预测电流控制 永磁同步电机 永磁同步电机
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| GB/T 7714 | 马宇航 , 沈鸿洲 , 廖墨淳 et al. 永磁同步电机改进三矢量模型预测电流控制 [J]. | 电力电子技术 , 2024 , 58 (12) : 35-37 . |
| MLA | 马宇航 et al. "永磁同步电机改进三矢量模型预测电流控制" . | 电力电子技术 58 . 12 (2024) : 35-37 . |
| APA | 马宇航 , 沈鸿洲 , 廖墨淳 , 杨公德 . 永磁同步电机改进三矢量模型预测电流控制 . | 电力电子技术 , 2024 , 58 (12) , 35-37 . |
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为揭示信号注入法中不同信号类型及其频率幅值对永磁同步电机参数辨识精度和控制性能的影响,对方波、梯形波、三角波和正弦波 4 种信号注入法进行了仿真及实验对比分析.首先,根据注入信号特点将方波和梯形波归为局部恒定信号,将三角波和正弦波归为全局时变信号,并基于遗忘因子递推最小二乘法构建两类信号注入法的参数辨识模型.其次,仿真分析两类注入信号频率和幅值对待辨识参数的辨识结果影响,综合考虑各待辨识参数的辨识精度,合理选取注入信号的频率和幅值.在此基础上,对比分析 4 种信号注入法的参数辨识结果,并评估系统控制性能.最后,搭建实验平台进行参数辨识实验验证.结果表明:局部恒定信号注入的参数辨识精度高于全局时变信号注入的参数辨识精度,但前者对系统控制性能影响大于后者对系统控制性能影响,其中梯形波注入具有最高的辨识精度,三角波注入对系统控制性能的影响最小.
Keyword ：
信号注入法 信号注入法 全局时变信号 全局时变信号 参数辨识 参数辨识 局部恒定信号 局部恒定信号 遗忘因子递推最小二乘法 遗忘因子递推最小二乘法
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| GB/T 7714 | 杨公德 , 陈宇翔 , 王朋 . 基于信号注入法的永磁同步电机参数辨识对比分析 [J]. | 电子测量与仪器学报 , 2024 , 38 (12) : 103-112 . |
| MLA | 杨公德 et al. "基于信号注入法的永磁同步电机参数辨识对比分析" . | 电子测量与仪器学报 38 . 12 (2024) : 103-112 . |
| APA | 杨公德 , 陈宇翔 , 王朋 . 基于信号注入法的永磁同步电机参数辨识对比分析 . | 电子测量与仪器学报 , 2024 , 38 (12) , 103-112 . |
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Grid-forming inverters, which are represented by droop control and virtual synchronous generator control, have been widely studied and applied because of their excellent grid-supporting ability and smooth off-grid switching. When a grid-forming inverter is connected to a microgrid or utility grid, the control loops of active power and reactive power will be coupled because of the voltage phase difference, which will affect the power control performance. This paper first derives the small-signal linearized model of the system, based on which a frequency feedforward control and an amplitude feedforward control are proposed to decouple the active power and reactive power control loops, respectively. The proposed decoupling strategy directly modifies the reference values through feedforward with an easily implementable principle that is applicable to various control coordinate systems, control coordinate systems, and control structures. By comparing system models with and without the proposed decoupling strategy, its effectiveness can be theoretically proven. Time-domain simulations and hardware experiments are presented to further validate its effectiveness.
Keyword ：
feedforward control feedforward control grid-forming inverter grid-forming inverter power decoupling power decoupling
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| GB/T 7714 | Liu, Baojin , Song, Zhaofeng , Yu, Bing et al. A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters [J]. | ENERGIES , 2024 , 17 (2) . |
| MLA | Liu, Baojin et al. "A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters" . | ENERGIES 17 . 2 (2024) . |
| APA | Liu, Baojin , Song, Zhaofeng , Yu, Bing , Yang, Gongde , Liu, Jinjun . A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters . | ENERGIES , 2024 , 17 (2) . |
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本发明涉及一种低计算量的双电机串联系统模型预测转矩控制方法，采样六相电流isA~isF、直流母线电压UDC、两台PMSM电角度θr1和θr2，并根据两台PMSM的数学模型计算两台PMSM的转矩Te1、Te2和定子磁链幅值ψs1、ψs2。计算两台PMSM的期望电压矢量u*s1和u*s2。计算两台PMSM期望电压矢量的位置角θu1和θu2。确定两台PMSM期望电压矢量在对应PMSM平面上所在扇区Sec。确定预选的基本电压矢量。计算零序电压给定值u*so2。确定预选的基本电压矢量是与u21还是与u42合成。计算每个由预选的基本电压矢量合成的虚拟电压矢量在α1、β1、α2、β2轴上的电压。计算每个虚拟电压矢量对应的成本函数值。确定最优电压矢量uopt(k+1)。本发明实现零序电流全周期闭环控制。
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| GB/T 7714 | 周扬忠 , 潘斌 , 钟天云 et al. 一种低计算量的双电机串联系统模型预测转矩控制方法 : CN202110774817.4[P]. | 2021-07-08 00:00:00 . |
| MLA | 周扬忠 et al. "一种低计算量的双电机串联系统模型预测转矩控制方法" : CN202110774817.4. | 2021-07-08 00:00:00 . |
| APA | 周扬忠 , 潘斌 , 钟天云 , 屈艾文 , 陈艳慧 , 杨公德 . 一种低计算量的双电机串联系统模型预测转矩控制方法 : CN202110774817.4. | 2021-07-08 00:00:00 . |
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Abstract ：
This paper investigates and compares the influences of different rotor pole on the torque performance of a novel separated excitation axial field hybrid permanent magnet (PM) memory (SE-AFHPMM) motor. The topology and operating principle of the proposed motor are firstly addressed. Then, comparisons are made on different stator/rotor pole combination motors in terms of flux linkage and electromagnetic torque. Finally, the PM torque components of the two types of PMs are separated by frozen permeability method (FPM) to investigate the actual contribution of them. © 2023 IEEE.
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| GB/T 7714 | Rao, Fei , Yang, Gongde . Influence of Rotor Pole Numbers on Torque Performance of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Motor [C] . 2023 . |
| MLA | Rao, Fei et al. "Influence of Rotor Pole Numbers on Torque Performance of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Motor" . (2023) . |
| APA | Rao, Fei , Yang, Gongde . Influence of Rotor Pole Numbers on Torque Performance of Novel Separated Excitation Axial Field Hybrid Permanent Magnet Memory Motor . (2023) . |
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