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An Improved Feedforward Control Strategy to Promote the Rapidity of PMSM Servo System and Reduce Overshoot Oscillation

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CES Transactions on electrical Machines and Systems 2025年第1期9卷 100-109页

作者： Wentao Zhang Yan Zhang Yongxiang Xu Jibin Zou School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

Under the condition of large inertia load,the stability of the servo system is more sensitive to the response speed and more likely to produce overshoot *** order to realize the requirements of high-precision and fast-response control of permanent magnet synchronous motor(PMSM)under large inertia load,an improved feedforward control strategy based on position impulse compensation and PD iterative algorithm is proposed to improve the response speed of the PMSM servo system and reduce the overshoot *** paper analyzes the mathematical models of the speed servo system and position servo system of the PMSM,calculates position overshoot impulse of the PMSM servo system,and improves the traditional feedforward control strategy to reversely compensate when the position is about to ***,in order to further reduce the position overshoot,the PD iterative control algorithm is superimposed without increasing the complexity of the *** input signal is continuously corrected through multiple runs to achieve a smoother response *** effectiveness of the proposed feedforward control strategy is verified by simulation and experiment.

关键词： Feedforward control Overshoot impulse Permanent magnet synchronous motor PD iterative control

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Eliminating Common Mode Voltage and Suppressing Conducted EMI Based on Discontinuous PWM for General Two-Unit PMSMs

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IEEE Transactions on Energy Conversion 2025年第1期40卷 465-477页

作者： Xu, Yongxiang Gao, Haiyang Zhang, Wentao Li, Shaobin Zou, Jibin Harbin Institute of Technology School of Electrical Engineering and Automation Harbin150001 China

In high-power motor drive systems, the two-unit permanent magnet synchronous motor (PMSM) system driven by parallel inverters controlled by pulse width modulation (PWM) will generate significant common mode voltage (CMV) and conducted electromagnetic interference (EMI), which will have adverse effects on the system. In order to minimize this adverse effect, this paper proposes a modulation strategy based on discontinuous PWM (DPWM) that can completely eliminate the CMV of the two-unit PMSM to ground. This strategy selects only one zero vector within each carrier cycle and makes the switching states of the parallel inverters three "1"states and three "0"states at any time, significantly suppressing conducted EMI. The PWM waveforms within each carrier cycle are symmetrical, which significantly reduces the total harmonic distortion (THD) of the motor phase current compared to asymmetric PWM waveforms. The principle of the proposed strategy is introduced and the resulting switching loss of inverters is analyzed. The impact of deadtime is discussed, and the edges of PWM signals are improved to eliminate the CMV spikes caused by deadtime. The experimental results are provided to verify the effectiveness of the proposed strategy. © 1986-2012 IEEE.

关键词： Pulse width modulation

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A Staggered Bipolar Magnetic Coupler for Dynamic Wireless Charging System

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IEEE Transactions on Power Electronics 2025年第7期40卷 10242-10253页

作者： Cheng, Lianbin Wei, Guo Hao, Lingjun Zhang, Yiming Zhang, Jiantao Harbin Institute of Technology School of Electrical Engineering and Automation Harbin150001 China Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou450000 China

Dynamic wireless charging provides a novel solution for extending the range of electric vehicles, but requires stable power transmission to maintain reliability. To reduce dynamic driving power fluctuations, this article proposes a design for staggered bipolar (SBP) transmitter track with a corresponding X-type receiver for electric vehicles. Through a staggered magnetic field configuration, the proposed SBP structure supports interoperable coupling with appropriately sized bipolar receiver oriented for traveling or lateral coupling. When paired with the X-type receiver, only a uniphase receiver is sufficient to achieve smooth traveling power output across full lateral misalignment range and track module spacing up to 50% of one transmitter length, without requiring additional auxiliary coils or circuitry. A 3.3 kW dynamic prototype was built based on the designed magnetic coupler and circuit parameters. Experimental results show that, without increasing width, by adjusting the pole shoe positions, the X-type receiver can adapt to SBP track module spacing of up to 125 mm, with output voltage fluctuation kept below 2.83% during aligned motion, and dc/dc efficiency reaches 91.04%. © 1986-2012 IEEE.

关键词： Wireless charging

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Moving Towards the Reliability-oriented Design of Hairpin Winding for EV Traction Machines Driven by SiC Inverter

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CES Transactions on electrical Machines and Systems 2025年第1期9卷 26-35页

作者： Xiaowei Ju Yue Zhang Zhiwei Xue Yuan Cheng Shumei Cui the School of Electrical Engineering Shenyang University of TechnologyShenyang 110870China 1 Shandong University Jinan 250100China the School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

With the development of high-frequency and highvoltagetraction machines(TM)incorporating hairpin windings(HW)and SiC inverters for electric vehicles(EV),both theinterturn voltage stress and temperature within HW are rising,increasing the risk of partial discharge(PD),and presentingsignificant challenges to insulation ***,this paperaddresses this issue and proposes potential ***,thepaper examines an 8-pole,48-slot,6-layer HW TM to highlightthe unique characteristics of this winding structure,and explainsthe uneven distribution of interturn voltage stress ***,a high-frequency equivalent circuitmodel of the HW TM prototype is *** error ofsimulation and experiment is only 5.7%,which proves theaccuracy of the ***,an improved HW scheme isproposed to lower the maximum voltage stress by 29.3%.Furthermore,the temperature distribution of HW TM isanalyzed to facilitate a detailed examination of the impact oftemperature on insulation ***,the partial dischargeinception voltage(PDIV)of interturn insulation,consideringtemperature effects,is calculated and verified *** paper proposes a reliability-oriented designmethod and process for HW *** demonstrates that thereliability-oriented design can achieve PD-free performance inthe design stage of HW.

关键词： Hairpin winding Insulation Electric-thermal stress Partial discharge Si C inverter

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Analysis of Influence of Carrier Motion on Magnetic Target Detection Method Based on Magnetic Gradient Tensor 11th

Analysis of Influence of Carrier Motion on Magnetic Target D...

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11th Frontier Academic Forum of electrical engineering, FAFEE 2024

作者： Zhang, Yuxiao Lin, Shengxin Pan, Donghua Li, Liyi School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

ISBN: (纸本)9789819787791

As a new technology, magnetic target detection technology has many advantages, such as low cost, fast and reliable, low environmental impact and so on. At present, there are many kinds of magnetic target detection techniques based on the total magnetic field intensity, magnetic field vector, magnetic gradient tensor, etc. The magnetic gradient tensor is the current research hotspot because it contains more abundant information. However, in most researches, the influence of carrier attitude change on location result is neglected, which affects the practical application of tensor method. Therefore, this paper focuses on analyzing the influence of the change of attitude angle of the carrier on the results of the STAR method that based on the magnetic gradient tensor. The simulation analysis is carried out when the attitude change of the carrier is ignored and the attitude change of the carrier is taken into account, and the attitude angle measurement error is at most one degree. It is found that the positioning error of magnetic target is greatly affected by the carrier attitude change, and the positioning error percentage is up to 191.7%. Therefore, it is necessary to measure the attitude angle and convert the coordinate when the tensor method is applied in practice. However, the carrier attitude change basically does not affect the estimated distance between the measuring point and the magnetic target, and the error percentage fluctuates in a small range of 0–3%, which provides a good idea for improving the positioning accuracy in the practical application of tensor method. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Target tracking

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Optimization design of automotive relay noise based on electric - magnetic - thermal digital model and experiments 3

Optimization design of automotive relay noise based on elect...

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3rd International Conference on electrical, Electronics, and Information engineering, EEIE 2024

作者： Wang, Ru Liu, Lanxiang Yang, Wenying School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

ISBN: (纸本)9781510688179

Noise is currently a highly concerned index for High end automobiles. In the rapid development of the new energy vehicle field, Most of the existing automotive relays cannot meet the noise requirements of new energy vehicle customers, so optimizing the noise of automotive relays is urgently. This article uses the digital models combined with experimental testing to analyze the noise mechanism of automotive relays, and determine the sources and propagation paths of the noise. Then, optimize the noise of automotive relays by focusing on the noise source and propagation paths. During the optimization process, based on the electromagnetic model of the digital models, the impact of the optimization plan on the electrical performance parameters of automotive relays is analyzed. And based on the thermal model of the digital models and experimental verification, the impact of changed the noise propagation paths on the temperature rise of automotive relays is ***, a batch of physical noise testing experiments was conducted on automotive relays to verify that the optimization scheme can significantly improve the noise of automotive relays. © The Authors.

关键词： Automotive Relay Digital Model noise optimization NVH

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Research on Vector Control System of Permanent Magnet Synchronous Motor Based on Current Diagonal Decoupling

Research on Vector Control System of Permanent Magnet Synchr...

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International Conference of electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Lin, Wenwen Zhang, Wentao Zhu, Pengcheng Xu, Yongxiang Zou, Jibin School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

ISBN: (纸本)9789819620494

The permanent magnet synchronous motor (PMSM) adopts the current vector control method with id = 0 to achieve current decoupling of the d-q axis during static processes. However, this method does not solve the problem of strong current coupling in the dynamic process of the motor system, especially in the transition process of sudden load, where the dynamic coupling of current has a more serious impact, resulting in a deterioration of the motor’s dynamic performance. This article summarizes the d-q axis current decoupling control methods for PMSM based on diagonalization decoupling, compares and analyzes the five current decoupling strategies included, and provides a d-q axis control model diagram for each decoupling method. By analyzing their respective control principles and transfer function characteristics, the conditions for achieving dynamic complete decoupling of current are given. Finally, simulation were conducted to compare the parameters of the PMSM under two operating conditions: complete matching and mismatch. The correctness of the theoretical analysis results was verified, and dynamic decoupling of the current loop was achieved. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Permanent magnets

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Estimating narrowband solar irradiance with physically constrained multi-output neural network 8

Estimating narrowband solar irradiance with physically const...

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8th International Conference on Energy engineering and Environmental Protection, EEEP 2024

作者： Zheng, Yuchen Song, Mengmeng Zhang, Hao Liu, Bai Yang, Dazhi School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

Solar narrowband irradiance data, although necessary in solar energy engineering and applications, are scarce due to its high-cost measurement. To obtain such data indirectly, building models with machine learning (ML) methods is recognized as an effective and practical approach. Considering the need for the irradiance data across multiple bands in certain scenarios, along with the importance of improving physical consistency of ML models, a physically constrained multi-output neural network is developed in this study. The model is based on shared bottom structure, with a specialized constraint layer added to ensure the estimations satisfy a simple physical inequality. Compared to several conventional single-output ML methods, the proposed model shows the best overall performance on the test set with a normalized root mean square error, normalized mean absolute error and R2 averaged across all target variables being 2.8970%, 1.7301% and 0.9975, slightly superior to XGBoost, one of the powerful and popular methods on related tasks, of which the corresponding metrics being 2.9358%, 1.7568% and 0.9975, respectively. © 2025 Published under licence by IOP Publishing Ltd.

关键词： Mean square error

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Experimental investigation on high heat flux plasma parameters of HIT-PSI device in argon discharges

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Plasma Science and technology 2025年第1期27卷 118-127页

作者： Tao HUANG Qiuyue NIE Cheng CHEN Lin NIE Wei ZHAO Tao JIANG Yang LIU Xu ZHAO Feng LI Xiaogang WANG School of Physics Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001People’s Republic of China Laboratory for Space Environment and Physical Science Harbin Institute of TechnologyHarbin 150001People’s Republic of China Southwestern Institute of Physics Chengdu 610041People’s Republic of China

Researches on plasma-facing materials/components(PFMs/PFCs)have become a focus in magnetic confinement fusion studies,particularly for advanced tokamak operation ***,spacecraft surface materials must maintain stable performance under relatively high temperatures and other harsh plasma conditions,making studies of their thermal and ablation resistance ***,a low-cost,low-energy-storage for superconducting magnets,and compact linear device,HIT-PSI,has been designed and constructed at harbin institute of technology(HIT)to investigate the interaction between stable high heat flux plasma and PFMs/PFCs in scrape-off-layer(SOL)and divertor regions,as well as spacecraft surface *** parameters of the argon plasma beam of HIT-PSI are diagnosed using a water-cooled planar Langmuir probe and emission *** magnetic field rises to 2 T,the argon plasma beam generated by a cascaded arc source achieves high density exceeding 1.2×10^(21)m^(-3)at a distance of 25 cm from the source with electron temperature surpassing 4 eV,where the particle flux reaches 10^(24)m^(-2)s^(-1),and the heat flux loaded on the graphite target measured by infrared camera reaches 4 MW/m^(2).Combined with probe and emission spectroscopy data,the transport characteristics of the argon plasma beam are analyzed.

关键词： linear plasma device plasma-material interaction high heat flux high particle flux

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Cooperative output regulation of heterogeneous directed multi-agent systems:a fully distributed model-free reinforcement learning framework

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Science China(Information Sciences) 2025年第2期68卷 170-185页

作者： Xiongtao SHI Yanjie LI Chenglong DU Huiping LI Chaoyang CHEN Weihua GUI Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics School of Mechanical Engineering and AutomationHarbin Institute of Technology (Shenzhen) School of Automation Central South University School of Marine Science and Technology Northwestern Polytechnical University School of Information and Electrical Engineering Hunan University of Science and Technology

In this paper, the cooperative output regulation(COR) problem of a class of unknown heterogeneous multi-agent systems(MASs) with directed graphs is studied via a model-free reinforcement learning(RL) based fully distributed eventtriggered control(ETC) strategy. First, we consider the scenario that the exosystem is accessible globally to all agents, an internal model-based augmented algebraic Riccati equation(AARE) is constructed, and its solution is learned by the proposed model-free RL algorithm via online input-output data. Further, for the scenario that the exosystem is accessible only to its adjacent followers, the distributed observers are designed for each agent to get the state of the exosystem, and an internal modelbased fully distributed adaptive ETC protocol is then synthesized to construct the corresponding AARE, and the feedback gain matrix is learned in a model-free fashion. The model-free RL-based control protocol proposed in this paper can not only remove the prior knowledge of agents' dynamics, but also release the dependence on global information by the adaptive event-triggered mechanism(ETM) and the new graph-based Lyapunov function. Finally, simulation results are illustrated to show the feasibility and effectiveness of the proposed control scheme.

关键词： model-free reinforcement learning unknown heterogeneous multi-agent systems fully distributed event-triggered control directed graph

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