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Low-cost sensorless control of four-switch,brushless DC motor drive with direct back-EMF detection

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第2期10卷 201-208页

作者： Abolfazl HALVAEI NIASAR Abolfazl VAHEDI Hassan MOGHBELLI Department of Electrical Engineering Faculty of EngineeringUniversity of Kashan Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Department of Science and Mathematics Texas A&M University at Qatar

We propose a position sensorless control scheme for a four-switch,three-phase brushless DC motor drive,based on the zero crossing point detection of phase back-EMF voltages using newly defined error functions(EFs). The commutation in-stants are 30° after detected zero crossing points of the EFs. Developed EFs have greater magnitude rather than phase or line voltages so that the sensorless control can work at a lower speed range. Moreover,EFs have smooth transitions around zero voltage level that reduces the commutation errors. EFs are derived from the filtered terminal voltages vao and vbo of two low-pass filters,which are used to eliminate high frequency noises for calculation of the average terminal voltages. The feasibility of the proposed sensorless control is demonstrated by simulation and experimental results.

关键词： Brushless DC motor Four-switch inverter sensorless control Back-EMF voltage sensing DSP

Magnetic sensorless control of Plasma Position and Shape in a Tokamak

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Plasma Science and Technology 2006年第1期8卷 80-83页

作者： K.NAKAMURA 罗家融王华忠季振山王华王枫齐娜 K.N.SATO K.HANADA M.SAKAMOTO H.IDEI M.HASEGAWA S.KAWASAKI H.NAKASHIMA A.HIGASHIJIMA Research Institute for Applied Mechanics Kyushu UniversityFukuoka816-8580Japan Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Interdisciplinary Graduate School of Engineering Sciences Kyushu UniversityFukuoka816-8580Japan

Magnetic sensorless sensing and control experiments with the plasma horizontal position have been carried out in the superconducting tokamak HT-7. The sensing is made to focus on the ripple frequency component of the power supply with thyristor and directly from them without time integration. There is no drift problem with the integrator of wagnetic sensors. Two kinds of control experiments have been carried out： to keep the position constant and swing the position in a triangular waveform, And magnetic sensorless sensing of plasma shape is discussed.

关键词： sensorless control drift problem HT-7 shape control EAST

Review of Parameter Identification and sensorless control Methods for Synchronous Reluctance Machines

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Chinese Journal of Electrical Engineering 2020年第2期6卷 7-18页

作者： Chengrui Li Gaolin Wang Guoqiang Zhang Nannan Zhao Dianguo Xu School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150000China

Synchronous reluctance machines(SynRMs)have drawn increasing attention in recent years owing to their advantages such as low cost,simple structure,ease of manufacture,and high *** main obstacle to the promotion of SynRMs is severe parameter nonlinearity,which deteriorates drive *** control methods for SynRMs are critical technologies that can broaden the industrial applications of *** methods of parameter identification and sensorless control strategies are reviewed and discussed,including self-commissioning,which is analyzed in ***,sensorless control strategies that can improve the industrial application of SynRMs are ***,future research trends concerning SynRMs are analyzed and discussed.

关键词： Synchronous reluctance machines parameter identification sensorless control

An MRAS method for sensorless control of induction motor over a wide speed range

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控制理论与应用（英文版） 2011年第2期9卷 203-209页

作者： Xu, Zhanguo Shao, Cheng Feng, Dongju School of Electronics and Information Engineering Dalian University of Technology Dalian Liaoning 116023 China School of Mechanical and Engineering Dalian University of Technology Dalian Liaoning 116023 China

This paper addresses the problem of wide speed range sensorless control of induction *** proposed method is based on model reference adaptive system (MRAS),in which the current model serves as the adjustable model,and a novel hybrid model integrating the modified voltage model (MVM) and high-frequency signal injection method (HFSIM) are established to serve as the reference *** HFSIM works together with MVM to improve the performance of the rotor speed and rotor flux position estimation at low speed,whereas at high speed,the MVM acts *** addition,a rotor resistance online estimation scheme is proposed to update the rotor resistance contained in the adjustable model and to ensure the estimation accuracy *** results show that the proposed MRAS method is very effective from low to high speed range,including zero speed.

关键词： sensorless control Induction motor MRAS High-frequency signal injection method Hybrid reference model

A 2-D Fuzzy Logic Based MRAS Scheme for sensorless control of Interior Permanent Magnet Synchronous Motor Drives with Cyclic Fluctuating Loads

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Chinese Journal of Electrical Engineering 2015年第1期1卷 85-91页

作者： Yang Mei Kai Sun Yuchao Shi Power Electronics and Motor Driving Engineering Center North China University of TechnologyBeijing100144China State Key Lab of Power Systems Tsinghua UniversityBeijing100084China Hangzhou Power Bureau State Grid Corporation of ChinaHangzhou310007China

Model reference adaptive system(MRAS)is typically employed for rotor position/speed estimation in sensorless interior permanent magnet motor(IPMSM)*** adjustment of control parameters in MRAS is a key issue for IPMSM drive systems with cyclic fluctuating *** order to avoid the difficulties involved with manual tuning of the control parameters,a new MRAS scheme based on fuzzy logic is proposed in this paper in which a fuzzy controller replaces the conventional PI *** implement this new MRAS scheme,a two-dimensional(2-D)fuzzy rule is *** proposed control scheme is employed in the IPMSM drives with cyclic fluctuating loads such as *** order to lower the motor speed ripple caused by the cyclic fluctuating load,a feed-forward compensation strategy with the load-matching motor output torque pattern is *** results demonstrate the feasibility and effectiveness of the proposed fuzzy logic based MRAS scheme with minimal rotor position estimation error.

关键词： Motor drives permanent magnet synchronous motor sensorless control model reference adaptive system fuzzy logic

An Enhanced sensorless control Scheme for PMSM Drives Considering Self-inductance Asymmetry

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CES Transactions on Electrical Machines and Systems 2022年第4期6卷 384-392页

作者： Lijian Wu Zekai Lyu Zekai Chen Jiaming Liu Ying Lu IEEE the College of Electrical Engineering Zhejiang UniversityHangzhou310027China Shanghai Electric Wind Power Group Company Ltd.Hangzhou310063China the 21st Research Institute of China Electronics Technology Group Corporation Ltd.Shanghai200030China

Inductance asymmetry,which is brought by inherent asymmetric parameters,manufacture tolerance,winding fault,cables with unequal lengths,etc.,of permanent-magnet synchronous machines(PMSMs)can cause current harmonics and inaccurate position *** paper proposes an enhanced fundamental model based sensorless control strategy for PMSMs with asymmetric *** proportional-integral-resonant current regulator is introduced to reduce the second-order harmonics of currents,but there are still negative sequence components in the estimated back-electromotive forces(EMFs),which can cause the position estimated *** from conventional methods in which negative sequences are filtered out before the phase-locked loop(PLL)module,the proposed method directly applies the estimated back-EMF with negative sequences as the reference input of *** improved PLL with a bi-quad filter is proposed to attenuate the arising second harmonic position error and heighten the steady-state ***,this position error is used for asymmetric inductance identification and its result is utilized to update the observer ***,the dynamic performance is improved by the output limitation on the bi-quad filter as well as the implementation of a fast-locking technique in the *** effectiveness of the proposed scheme is verified by experimental results.

关键词： Inductance asymmetry Permanent magnet synchronous machine(PMSM) Position estimation error sensorless control

Improved Rotor Flux Observer for sensorless control of PMSM with Adaptive Harmonic Elimination and Phase Compensation

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CES Transactions on Electrical Machines and Systems 2019年第2期3卷 151-159页

作者： Wei Xu Lei Wang Yi Liu Frede Blaabjerg the State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan430074China the Department of Energy Technology Aalborg UniversityAalborg 9220Denmark

In this paper,a sensorless control strategy of a permanent magnet synchronous machine(PMSM)based on an improved rotor flux observer(IFO)is *** to the unknown integral initial value and the high harmonics caused by current sampling and inverter nonlinearities,the flux linkage estimated by traditional rotor flux observer may be *** order to address these issues,a self-adaptive band-pass filter(SABPF)is designed to eliminate the DC component and high-frequency harmonics of the estimated equivalent rotor flux ***,in order to avoid that the design of PI parameter is influenced by the amplitude of equivalent rotor flux linkage,an improved phase-locked loop(IPLL)is employed to obtain the rotor speed and to normalize the estimated equivalent rotor flux *** addition,angle shift caused by an SABPF is compensated to improve the accuracy of the estimated flux linkage ***,the parameter robustness of this method is analyzed in ***,simulation and experimental results demonstrate the effectiveness and parameter robustness of the proposed method.

关键词： Improved phase-locked loop(IPLL) sensorless control improved flux observer(IFO) self-adaptive band-pass filter(SABPF).

sensorless control of IPMSM for Last 10 Years and Next 5 Years

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CES Transactions on Electrical Machines and Systems 2017年第2期1卷 91-99页

作者： Seung-Ki Sul Yong-Cheol Kwon Younggi Lee Electrical and Computer Engineering Department Seoul National University

This paper presents the developments of sensorless control of interior permanent magnet synchronous machine(IPMSM)for last 10 years,which could be divided into the past and the present for each 5 *** popular methods developed for last 10 years would be described and evaluated,and the limitations with the methods are *** the past a concept extended EMF(EEMF)was introduced and it can model IPMSM as a non-salient motor,meaning that the representation of IPMSM in the estimated rotor reference frame would be much simpler and ***,because it still relied on back EMF,standstill operation was ***,the position control of IPMSM could not be achieved with EEMF *** sensorless drive,the high-frequency signal injection method exploiting inherent saliency of IPMSM has been continuously developed for last 10 years and applied to various industry fields,where torque control at standstill is *** performance has been improved but there are still many problems to be *** the present,the square-wave signal injection at estimated d-axis has improved the control performance ***,there are strong demands to improve the control performance of sensorless drive,*** on the problems in the present,in this paper the possible developments of sensorless drive of IPMSM in next 5 years are enlightened as the future of sensorless control.

关键词： Back EMF extended EMF method high-frequency signal injection method interior permanent magnet synchronous motor review sensorless control

sensorless control for Surface Mounted PM Machine with a High Inertial Load

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CES Transactions on Electrical Machines and Systems 2018年第1期2卷 116-122页

作者： Qidong Li Xudong Wang Jia Jiang Qiao Zhang Qiaoling Tong School of Optical and Electronic Information Huazhong University of Science and Technology School of Automation Wuhan University of Technology Huazhong University of Science and Technology Department of Electrical Engineering and Computer Science University of CaliforniaIrvine

􀃼PM machine or Permanent magnet synchronous motor􀋄PMSM􀋅is a nonlinear system with multivariable *** achieve the sensorless control of a PMSM with high inertial load,a modified current observer,using PI regulator instead of sliding mode switching function,is proposed in this *** modified current observer can solve the chattering and phase delay problem while still maintaining the robust advantages of sliding mode system in position *** addition,a new phase-locked loop(PLL)based angle switching strategy is designed to ensure the motor can smoothly switch from I-F control to closed-loop sensorless vector control in startup stage with a high inertial *** simulation and experimental results show that the control system of PMSM with proposed ideas has fast response speed,accurate rotor position estimation,stable state switching and good system robustness under high inertia load.

关键词： Back-EMF high inertial load PLL PMSM sensorless control