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Study of direct back EMF detection for sensorless brushless DC motor

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Journal of Harbin Institute of Technology(New Series) 2010年第4期17卷 461-466页

作者：邹继斌江善林梁维燕 Dept.of Electrical Engineering Harbin Institute of Technology

In this paper,a new rotor position detecting method for the sensorless control of brushless DC motor ( BLDCM) is introduced. It obtains the phase back EMF signal from the motor terminal voltage by properly choosing the PWM and sensing strategy directly and needn't the motor neutral point voltage information. The paper analyzes both the steady-state of PWM on the high side modulator mode which doesn't consider the parasitic capacitance Coes in the switches and the transient-state of PWM on the high side modulator mode which considers the parasitic capacitance Coes in the switches in detail. The experimental results verify that the proposed method is not sensitive to switching noise,no filtering is required,and good motor performance is achieved within a wide speed range.

关键词： BLDCM sensorless Back EMF PWM

sensorless Control of Double-sided Linear Switched Reluctance Motor Based on Simplified Flux Linkage Method

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CES Transactions on Electrical Machines and Systems 2017年第3期1卷 246-253页

作者： Wenkai Wei Qing Wang Rui Nie China University of Mining&Technology XuzhouJiangsu221008China

The utilization of position sensor reduces the system reliability of switched reluctance motor(SRM),especially in harsh environments.It also increases the complexity of the system.Therefore,the research on sensorless control has become one of the hot spots in recent years.Comparing with the existing sensorless control technology,the new method exploring the sensorless control of double-sided linear switched reluctance motor(DLSRM)shows the following advantages:1)high accuracy,and 2)good practicability.Based on the new proposed method,the DLSRM speed controller is augmented with the peak current method and the voltage chopping closed-loop speed control.Moreover,the winding resistance in the equation is corrected according to the integral flux linkage when the phase current is zero.The accuracy and feasibility of the simplified flux linkage method in estimating the position of the DLSRM is verified.

关键词： Correct resistance value DLSRM sensorless simplified flux linkage method

Application of Full-Order and Simplified EKFs to sensorless PM Brushless AC Machines

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International Journal of Automation and computing 2005年第2期2卷 179-186页

作者： David Howe Department of Electronic and Electrical Engineering University of Sheffield Sheffield S1 3JD UK

This paper employs an extended Kalman filter (EKF) to estimate the rotor position and speed of a vector controlled surface-mounted permanent magnet (PM) brushless AC (BLAC) motor from measured terminal voltages and currents only. Both full-order and simplified EKFs are employed and their simulated performance capabilities are compared. Excellent agreement is achieved between estimated and commanded results. The EKF is also employed to identify the stator flux-linkage due to the PMs, which is influenced by temperature variation and magnetic saturation.

关键词： Brushless AC drives extended Kalman filter parameter identification permanent magnet sensorless

Improved sensorless Operation of Interior PM BLAC Motor Drives with Reduced-Order EKF

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International Journal of Automation and computing 2006年第1期3卷 99-106页

作者： David Howe Department of Electronic and Electrical Engineering University of Sheffield Mappin Street Sheffield S1 3JD UK

It is a challenge to realise an EKF-based sensorless controller for an Interior Permanent Magnet （IPM） brushless ac motor drive due to the influence of nomlinearities and rotor saliency. An improved reduced-order EKF method is presented, reducing the rotor position estimation error of an IPM motor, as evident in [1] due to the neglect of saliency. The effectiveness of the proposed method is verified experimentally.

关键词： Brushless AC EKF interior PM motor permanent magnet sensorless

Simplified EKF Based sensorless Direct Torque Control of Permanent Magnet Brushless AC Drives

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International Journal of Automation and computing 2004年第1期1卷 35-41页

作者： David Howe Department of Electronic and Electrical Engineering University of Sheffield Mappin Street Sheffield S1 3JD UK

A simplified extended Kalman filter (EKF) based sensorless direct torque control technique for a permanent magnet brushless AC drive is proposed. Its performance is compared with that obtained with other sensorless methods for estimating the rotor speed and position from a stator flux-linkage. Since the EKF has an inherently adaptive filtering capability and does not introduce phase delay, the technique provides better speed estimates. In addition, the technique is easy to implement and requires minimal computation.

关键词： Brushless motor direct torque control (DTC) extended Kalman filter (EKF) permanent magnet sensorless

SRG POSITION sensorless TECHNIQUE WITH CURRENT CHOPPING MODE

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Transactions of Nanjing University of Aeronautics and Astronautics 2002年第1期19卷 14-18页

作者： ZhuXuezhong LiuDiji GuiXiaojie LiuChuang AeronauticalPowerSci-TechCenter NUAA29YudaoSttetNanjing210016P.R.Chna DepartmentofTelecommunicationEngineering ShanghaiJiaotongUniversityShanghai200240P.R.China

A onvel current chopping strategy for switched reluc-tance generator(SRG)-a full conducted current chopping(FCCC)scheme is presented,According to characteristics lf phase current wave of SRG generating operation,it can be generated under sensorless condition without an addi-tional circuit or a position signal algorithm.Simulational results show the feasibility of this scheme.Experimental results of a 6kW6/4configuration SRG show its simplic-ity and high reliability with little decrease in efficiency.Soit will be widely used.

关键词： SRG position sensorless current chopping control 开关磁阻发电机无位置传感器电流斩波控制

sensorless control of switched reluctance motor based on the logical relationship of three-phase inductance

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Sensorless control of switched reluctance motor based on the...

Integrated in-process chatter monitoring and automatic suppression with adaptive pitch control in parallel turning

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作者： Ping Ren Aide Xu Shenghao Wang Wen Zhang College of Electrical Engineering of Ships Dalian Maritime University College of Information and Science Technology Dalian Maritime University

The utilization of position sensor reduces the system reliability of switched reluctance motor（SRM）,especially in harsh environments.It also increases the complexity of the system.In order to solve this problem,a new position sensorless control strategy is presented.The method is based on the logical relationship of three-phase inductance which varies regionally with the change of rotor position.The rotor position can be divided into several regions so that each region corresponds to a unique logical relationship,and the position pulse signals of each phase is obtained by recognizing the position regions.Based on the position pulse signals,the estimated rotor position can be calculated and then sensorless operation is achieved.This method is easy for implementation without additional hardware and complex calculation.The simulation and experimental results indicate that the proposed method can estimate rotor position accurately and have good practical value.

关键词： Switched reluctance motor（SRM） sensorless logical relationship three-phase inductance

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Advances in Manufacturing 2018年第3期6卷 291-300页

作者： Shuntaro Yamato Yuki Yamada Kenichi Nakanishi Norikazu Suzuki Hayato Yoshioka Yasuhiro Kakinuma Department of System Design Engineering Keio University3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan Nakamura-Tome Precision Industry Co. Ltd. 15 NetsunoHakusan Ishikawa 920-2195 Japan Department of Mechanical Science and Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Japan Precision and Intelligent Laboratory Tokyo Institute of Technology 4259-G2-19 Nagatsuta Midori-kuYokohama 226-8503 Japan

Simultaneous processes such as parallel turningor milling offer great opportunities for more efficientmanufacturing because of their higher material removalrates. To maximize their advantages, chatter suppressiontechnologies for simultaneous processes must be devel-oped. In this study, we constructed an automatic chattersuppression system with optimal pitch control for shared-surface parallel turning with rigid tools and a flexibleworkpiece, integrating in-process chatter monitoring basedon the cutting force estimation. The pitch angle betweentwo tools is tuned adaptively in a position control system inaccordance with the chatter frequency at a certain spindlespeed, in a similar manner as the design methodology forvariable-pitch cutters. The cutting force is estimatedwithout using an additional external sensor by employing amulti-encoder-based disturbance observer. In addition, thechatter frequency is measured during the process by per-forming a low-computational-load spectrum analysis at acertain frequency range, which makes it possible to cal-culate the power spectrum density in the control system ofthe machine tool. Thus, the constructed system for automatic chatter suppression does not require any addi-tional equipment.

关键词： Chatter Multitasking machine tool Parall elturning Adaptive control sensorless Disturbance observer

Rotor Position Estimation for Single-and Dual-Three-Phase Permanent Magnet Synchronous Machines Based on Third Harmonic Back-EMF under Imbalanced Situation

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Chinese Journal of Electrical Engineering 2017年第1期3卷 63-72页

作者： Jiaming Liu Zi-Qiang Zhu Department of Electronic and Electrical Engineering University of SheffieldS14DEUK

In this paper,an improved rotor position estimation strategy based on third harmonic back-EMF for single-and dual-three-phase permanent magnet synchronous machines(PMSMs)under imbalanced situation is proposed.Due to the imbalanced machine impedance,back-EMF or sensing resistor network,the measured triplen harmonic back-EMF will contain certain fundamental component distortion which may severely deteriorate the performance of rotor position estimation.With the aid of the fundamental component compensator,this distortion can be significantly compensated,and the rotor position estimation error can be minimized considerably.The proposed strategy has been implemented on a dSPACE platform with a prototype of dual-three-phase PMSM with serious imbalanced parameters,and operate at single-and dual-three-phase conditions.The experimental results prove that the proposed strategy can significantly improve the steady-state and dynamic performance of rotor position estimation under imbalanced situation.

关键词： Fundamental distortion compensation imbalanced situation sensorless single-and dual-three-phase PMSMs SRFF third harmonic back-EMF