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position sensorless control of SRMs Based on Improved Sliding Mode Speed controller and position Observer

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2025年第1期72卷 100-110页

作者： Sun, Xiaodong Wang, Nuonuo Yao, Ming Lei, Gang Jiangsu Univ Automot Engn Res Inst Zhenjiang 212013 Peoples R China Jiangsu Univ Sch Automot & Traff Engn Zhenjiang 212013 Peoples R China Univ Technol Sydney Sch Elect & Data Engn Sydney NSW 2007 Australia

This article presents a sensorless control strategy based on an improved sliding mode speed controller (SMSC) and sliding mode position observer (SMPO) for switched reluctance motor (SRM). The proposed method could reduce the motor speed response time and improve the estimation accuracy of rotor position information. First, an improved SMSC based on time-varying function (TVSMSC) is proposed to reduce the influence of internal parameter disturbance and external load disturbance so that the SRM's actual speed can accurately track the reference speed. In order to reduce the initial harmful peak generated by the SRM during initial startup, a time-varying function is introduced into the new approach rate. Then, to obtain more accurate rotor position information, an SMPO based on the inductance model is used to estimate the rotational speed and rotor position in real time. Finally, the experimental validation is performed. The results show that the proposed strategy can effectively reduce the overshoot and speed transient response time while maintaining high robustness and high estimation precision of rotor position.

关键词： Inductance Reluctance motors Observers Torque Switches sensorless control Rotors Improved sliding mode control position sensorless control sliding mode position observer (SMPO) switched reluctance motor time-varying function

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PMSM position sensorless control Based on Improved Second-Order SOIFO

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WORLD ELECTRIC VEHICLE JOURNAL 2025年第3期16卷 182-182页

作者： Song, Ge Ni, Hongyu Wang, Wenyuan Yan, Wenxu Jiangnan Univ Sch Internet Things Wuxi 214122 Peoples R China State Grid Zhejiang Elect Power Co Ltd Shaoxing 214111 Peoples R China

Due to detection errors, motor parameter deviations, and other uncertainties, traditional motor flux estimation models suffer from the complications of DC bias and high-order harmonics. To address these issues, two flux observers, the second-order generalized integrator flux observer (SOIFO) and the second-order SOIFO, are designed for position sensorless control of permanent magnet synchronous motors (PMSMs). The position sensorless control of PMSMs based on an improved second-order SOIFO is proposed in this paper. The proposed method enhances the frequency-locked loop (FLL) in the observer by introducing a double-axis frequency-locked loop (DFLL), which improves the dynamic performance and disturbance rejection capability of the flux observer. By replacing FLL with DFLL for angular frequency estimation, the method effectively eliminates second-harmonic interference while reducing estimation delays, leading to faster and more accurate rotor position estimation in the second-order SOIFO. Additionally, the improved observer demonstrates enhanced robustness against disturbances, ensuring more stable position sensorless control. The effectiveness of the proposed approach is validated through both simulations and experimental comparisons.

关键词： permanent magnet synchronous motor position sensorless control frequency-locked loop second-order SOIFO

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position sensorless control of Switched Reluctance Motor Drives Based on a New Sliding Mode Observer Using Fourier Flux Linkage Model

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IEEE TRANSACTIONS ON ENERGY CONVERSION 2022年第2期37卷 978-988页

作者： Sun, Xiaodong Tang, Xingtao Tian, Xiang Wu, Jiangling Zhu, Jianguo Jiangsu Univ Automot Engn Res Inst Zhenjiang 212013 Jiangsu Peoples R China Univ Sydney Sch Elect & Informat Engn Camperdown NSW 2006 Australia

This paper proposes a new position sensorless method for switched reluctance motor (SRM) drive control based on a sliding mode observer using nonlinear Fourier flux linkage model. First, to obtain an accurate mathematical model of SRM for establishment of sliding mode position observer (SMPO), an analytical method based on Fourier polynomial function is introduced to regress the nonlinear relationship between flux linkage, position and current. Then, a new SMPO is designed in detail to estimate the rotor position, including the establishment of SRM model of sliding mode observer, and analysis of estimation error and convergence conditions of SMPO. Finally, position sensorless control of SRM drive based on SMPO is carried out in terms of accuracy and robustness in simulation. Experiments are also given on a dynamic testing platform to verify the effectiveness of the proposed position sensorless scheme.

关键词： Reluctance motors Couplings Rotors Mathematical models Torque Observers Windings position sensorless control switched reluctance motor nonlinear modeling sliding-mode observer Fourier flux linkage model (FFLM)

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position sensorless control for PMSM Drives With Single Current Sensor

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2023年第1期70卷 178-188页

作者： Yan, Hao Wang, Wenjie Xu, Yongxiang Zou, Jibin Northwestern Polytech Univ Sch Civil Aviat Xian 710072 Peoples R China Harbin Inst Technol Sch Elect Engn & Automat Harbin 150001 Peoples R China

The aim of this article is an attempt to provide a more credible control mode or a fault-tolerant control strategy for permanent magnet synchronous motor (PMSM) drives when an unexpected failure occurs to the current or position sensor. Considering that, a position sensorless control method that uses only one current sensor is proposed. Different from a traditional position sensorless control scheme that utilizes additional current sensors to obtain information of multiple phase currents, only a single current sensor (SCS) arranged on one of the current branches is included among the whole control circuit. Three-phase currents are reconstructed by sequentially sampling the SCS under specific voltage vectors, and directly employed for motor position estimation. A nonlinear position observer established according to the gradient descent is adopted. Focusing on the special current-acquisition pattern in this article, a step-size optimization method based on golden section search is proposed to minimize position estimation error. The experimental results reveal that the method in this article is comparable to the traditional full-current-sensor method in terms of position estimation, which confirms the fault-tolerant capability as one certain sensor of the control structure malfunctions.

关键词： Observers sensorless control Estimation error Synchronous motors Switches Space vector pulse width modulation Rotors Permanent magnet synchronous motor (PMSM) position sensorless control single current sensor (SCS) step-size optimization

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position sensorless control Without Phase Shifter for High-Speed BLDC Motors With Low Inductance and Nonideal Back EMF

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IEEE TRANSACTIONS ON POWER ELECTRONICS 2016年第2期31卷 1354-1366页

作者： Li, Wenzhuo Fang, Jiancheng Li, Haitao Tang, Jiqiang Beijing Univ Aeronaut & Astronaut Fundamental Sci Novel Inertial Instrument & Nav S Beijing 100083 Peoples R China

This paper presents a novel method for position sensorless control of high-speed brushless DC motors with low inductance and nonideal back electromotive force (EMF) in order to improve the reliability of the motor system of a magnetically suspended control moment gyro for space application. The commutation angle error of the traditional line-to-line voltage zero-crossing points detection method is analyzed. Based on the characteristics measurement of the nonideal back EMF, a two-stage commutation error compensation method is proposed to achieve the high-reliable and high-accurate commutation in the operating speed region of the proposed sensorless control process. The commutation angle error is compensated by the transformative line voltages, the hysteresis comparators, and the appropriate design of the low-pass filters in the low-speed and high-speed region, respectively. High-precision commutations are achieved especially in the high-speed region to decrease the motor loss in steady state. The simulated and experimental results show that the proposed method can achieve an effective compensation effect in the whole operating speed region.

关键词： Back electromotive force (EMF) detection brushless DC (BLDC) motor position sensorless control

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position sensorless control of IPMSMs based on a novel flux model suitable for maximum torque control

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ELECTRICAL ENGINEERING IN JAPAN 2013年第3期184卷 55-66页

作者： Matsumoto, Atsushi Hasegawa, Masaru Matsui, Keiju Nagoya Univ Nagoya Aichi 4648601 Japan Chubu Univ Kasugai Aichi 487 Japan

In this paper, a novel position sensorless control method for interior permanent magnet synchronous motors (IPMSMs) that is based on a novel FLux model suitable for maximum torque control has been proposed. Maximum torque per ampere (MTPA) control is often utilized for driving IPMSMs with the maximum eciency. In order to implement this control, generally, the accurate motor parameters are required. However, the inductance varies dramatically because of magnetic saturation, which has been one of the most important problems in recent years. Therefore, the conventional MTPA control method fails to achieve maximum eciency for IPMSMs because of parameter mismatches. In this paper, first, a novel FLux model has been proposed for realizing the position sensorless control of IPMSMs, which is insensitive to Lq. In addition, in this paper it is shown that the proposed FLux model can approximately estimate the maximum torque control (MTC) frame, which is a new coordinate aligned with the current vector for MTPA control. Next, in this paper, a precise estimation method for the MTC frame has been proposed. By this method, highly accurate maximum torque control can be achieved. A decoupling control algorithm based on the proposed model is also addressed in this paper. Finally, some experimental results demonstrate the feasibility and effectiveness of the proposed method. (c) 2013 Wiley Periodicals, Inc. Electr Eng Jpn, 184(3): 5566, 2013;Published online in Wiley Online Library (***). DOI 10.1002/eej.22380

关键词： IPMSM position sensorless control maximum torque per ampere control FLux model

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position sensorless control of BLDC Motors Based on Global Fast Terminal Sliding Mode Observer

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JOURNAL OF POWER ELECTRONICS 2015年第6期15卷 1559-1566页

作者： Wang, Xiaoyuan Fu, Tao Wang, Xiaoguang Tianjin Univ Sch Elect Engn & Automat Tianjin 300072 Peoples R China

The brushless DC motor (BLDCM) has many advantages. As a result, it is widely used in electric vehicle (EV) drive systems. To improve the reliability of the motor control system, a position sensorless control strategy based on a sliding mode observer (SMO) is proposed. The global fast terminal sliding mode observer (GFTSMO) is proposed to enhance the control performance of the SMO control system. The advantages of the linear sliding mode and the nonsingular terminal sliding mode (NTSM) are combined in the control strategy. The convergence speed of the system state is enhanced. The motor commutation point is obtained with the observation of the back EMT', and the instantaneous torque value of the motor is calculated. Therefore, the position sensorless control of the BLDCM is realized. Experimental results show that the proposed control strategy can improve the convergence speed, dynamic characteristics and robustness of the system.

关键词： Brushless DC motor (BLDCM) Electric vehicle (EV) Global fast terminal sliding mode observer (GFTSMO) Instantaneous torque control position sensorless control

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position sensorless control for IPMSM of Spatial Inductance Distribution with Nonsinusoidal Inductance Waveform Based on Pattern Matching Method

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ELECTRICAL ENGINEERING IN JAPAN 2017年第3期201卷 35-42页

作者： Makaino, Yuki Doki, Shinji Nagoya Univ Grad Sch Engn Dept Elect Engn & Comp Sci Nagoya Aichi Japan

This paper presents a novel pattern matching based position sensorless control method for IPMSMs. A target IPMSM for the proposed method is designed such that it has high power and torque density, while also being significantly influenced by magnetic saturation. As previously reported in papers , for IPMSMs, heavy magnetic saturation affects the spatial distribution of phase inductances according to rotor positions. Most position sensorless controls at low speeds typically depend on the assumption that phase inductances have sinusoidal spatial distribution according to rotor positions. Therefore, it is difficult to apply conventional methods to IPMSMs with heavy magnetic saturation. In the proposed method, rotor position is estimated by pattern matching using feature values, so that the phase inductances have unique and reproducible value according to rotor positions. While template data sets are required for the proposed method, the assumption for sinusoidal phase inductances is not. In this paper, the effect of magnetic saturation for position estimation based on conventional methods is discussed in Section 1 and 2. Then, details of the proposed method are shown in Section 3. In Section 4, results of experiments carried out in steady state and transient state are presented. The effectiveness of the proposed method is verified through the experiments.

关键词： interior permanent magnet synchronous motor position sensorless control inductance magnetic saturation high power density pattern matching

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position sensorless control for ultrasonic motors based on input voltage information

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ELECTRICAL ENGINEERING IN JAPAN 2008年第1期163卷 57-64页

作者： Senjyu, Tomonobu Yoshida, Tomohiro Nakamura, Mitsuru Urasaki, Naomitsu Funabashi, Toshihisa Sekine, Hideomi Univ Ryukyus Nishihara Okinawa 90301 Japan

This paper presents a method of position sensorless control of ultrasonic motors (USM). The position sensorless control method is useful for reducing the cost and size of drive system. The position estimation method is based on the input voltage information of the ultrasonic motor. The characteristic of input voltage versus rotor position is expressed by a quadratic function which is used to estimate a rotor position based on input voltage information. This estimation method, which uses only the drive voltage of the ultrasonic motor, is a very simple algorithm and shows good estimation ability. The parameters of the quadratic function are adjusted by using the recursive least squares method and are obtained on-line. Since it can correspond to parameter change, the estimated rotor position shows good agreement with the measured rotor position against load torque and motor temperature changes. sensorless position control is achieved by using the estimated rotor position instead of the measured rotor position. The validity of the proposed method is confirmed by experimental results. (c) 2008 Wiley Periodicals, Inc.

关键词： ultrasonic motor position sensorless control input voltage information

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position sensorless control of Switched Reluctance Motors Based on Angle Adjustment Using Nonlinear Inductance and Flux Model

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IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2024年第12期71卷 15467-15477页

This article presents a synthetic sensorless control strategy combining the inductance and simplified flux models for switched reluctance motors (SRMs). First, the initial driving phase is determined by improved phase inductance comparison (IIPC). Second, the SRM's driving signal is obtained by the improved double inductance threshold (IDIT) method to ensure a reliable and smooth start. Third, to address the challenges posed by the large memory resources and lengthy execution time of the conventional table searching method for flux, the Fourier polynomial is employed to calculate the reference flux. Then, by comparing it with the real-time flux, the Hall signal can be obtained to estimate the rotor position. Moreover, an angle adaptive adjustment method is proposed to satisfy the requirements of different speeds and working ***, a six-phase 12/10 pole SRM is used to verify the effectiveness of the proposed sensorless control strategy.

关键词： Inductance Reluctance motors Rotors Motors sensorless control Estimation Sensors Angle adaptive adjustment high-frequency pulse injection improved double inductance threshold position sensorless control switched reluctance motor

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