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NOVEL SENSORLESS VECTOR CONTROL SYSTEM OF INDUCTION MACHINE BASED ON FLUX OBSERVER IN FIELD WEAKENING 被引量:1
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作者 邹积勇 许镇琳 孙凯 《Transactions of Tianjin University》 EI CAS 2006年第1期1-5,共5页
A speed-sensorless vector control system for induction machines (IMs)is presented, According to the vector control theory of IMs, the rotor flux is estimated based on a flux observer,and the speed is estimated throu... A speed-sensorless vector control system for induction machines (IMs)is presented, According to the vector control theory of IMs, the rotor flux is estimated based on a flux observer,and the speed is estimated through the method of q-axis rotor flux converging on zero with proportional integral regulator, A 0.75 kW,50 Hz,two-pole induction machine was used in the simulation and experimental verification, The simulation model was constructed in Matlab. A series of tests were performed in the field weakening region, for both no-load and loaded operation. The estimated speed tracks the actual speed well in the based speed region and field weakening region ( 1 per unit value to 4 per unit value). The small estimation error of residual speed is due to the existence of slip. 展开更多
关键词 induction machines (IMs) sensorless vector control flux observer speed estimation
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Speed Sensorless Vector Control of Induction Motor Based on Reduced Order Extended Kalman Filter 被引量:1
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作者 杨文强 贾正春 许强 《Journal of Southeast University(English Edition)》 EI CAS 2001年第1期41-45,共5页
A speed sensorless vector control system of induction motor with estimated rotor speed and rotor flux using a new reduced order extended Kalman filter is proposed. With this method, two rotor flux components are sele... A speed sensorless vector control system of induction motor with estimated rotor speed and rotor flux using a new reduced order extended Kalman filter is proposed. With this method, two rotor flux components are selected as the state variables, and the rotor speed as an estimated parameter is regarded as an augmented state variable. The algorithm with reduced order decreases the computational complexity and makes the proposed estimator feasible to be implemented in real time. The simulation results show high accuracy of the estimation algorithm and good performance of speed control, and verify the usefulness of the proposed algorithm. 展开更多
关键词 extended Kalman filter flux estimation speed estimation speed sensorless vector control induction motor
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Vector Control Scheme of Five-Phase Induction Machines under Open-Circuit Phase Faults
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作者 Ayman Abdel-Khalik Ahmed Elserougi +1 位作者 Shehab Ahmed Ahmed Massouc 《Journal of Energy and Power Engineering》 2014年第1期144-151,共8页
Multiphase induction machine is normally controlled using rotor field oriented vector control. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this ... Multiphase induction machine is normally controlled using rotor field oriented vector control. Under phase(s) loss, the machine currents can be optimally controlled to satisfy certain optimization criteria. In this paper, a vector control scheme to a five-phase induction machine is introduced to ensure equal phase currents and minimum torque ripples under a phase open circuit. The controller idea can be extended to any number of phases with any number of open phases. The fundamental dq components of the stator voltage are obtained using only two PI controllers for the fundamental sequence plane, as in conventional vector control of three-phase machines. Based on steady state model, a simple expression is derived to estimate the required dq voltage components of other sequence planes to ensure equal stator phase currents and minimum torque ripple. A five-phase machine is simulated using MATLAB/Simulink to ensure controller validity. 展开更多
关键词 vector control five phase machine induction motor fault.
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A Novel Fuzzy Direct Torque Control System for Three-level Inverter-fed Induction Machine 被引量:2
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作者 Shu-Xi Liu Ming-Yu Wang +1 位作者 Yu-Guang Chert Shan Li 《International Journal of Automation and computing》 EI 2010年第1期78-85,共8页
Diode clamped multi-level inverter (DCMLI) has a wide application prospect in high-voltage and adjustable speed drive systems due to its low stress on switching devices, low harmonic output, and simple structure. Ho... Diode clamped multi-level inverter (DCMLI) has a wide application prospect in high-voltage and adjustable speed drive systems due to its low stress on switching devices, low harmonic output, and simple structure. However, the problem of complexity of selecting vectors and capacitor voltage unbalance needs to be solved when the algorithm of direct torque control (DTC) is implemented on DCMLI. In this paper, a fuzzy DTC system of an induction machine fed by a three-level neutral-point-clamped (NPC) inverter is proposed. After introducing fuzzy logic, optimal selecting switching state is realized by applying various strategies which can distinguish the grade of the errors of stator flux linkage, torque, the neutral-point potential, and the position of stator flux linkage. Consequently, the neutral-point potential unbalance, the dr/dr of output voltage and the switching loss are restrained effectively, and desirable dynamic and steady-state performances of induction machines can be obtained for the DTC scheme. A design method of the fuzzy controller is introduced in detail, and the relevant simulation and experimental results have verified the feasibility of the proposed control algorithm. 展开更多
关键词 Multi-level inverter direct torque control (DTC) fuzzy controller space voltage vector induction machine
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Modified sensorless vector control system of IM based on flux observer
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作者 邹积勇 许镇琳 孙凯 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2007年第6期880-883,共4页
This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized ... This paper presents a speed sensorless vector control system for induction machine (IM),which is based on a flux observer. According to vector control theory of IM,the q-axis rotor flux converging on zero is utilized for speed estimation. Additionally this system solved the online identification of stator resistance by d-axis flux error. The advantages of the proposed system are simplicity and avoidance of the problems caused by only using a voltage model. The effectiveness of the proposed system has been verified by simulation and experimentation. 展开更多
关键词 induction machine sensorless vector control flux observer speed estimation
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A modified neural learning algorithm for online resistance estimation in vector controlled induction drives rotor motor 被引量:1
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作者 A. CHITRA S. HIMAVATHI 《Frontiers in Energy》 SCIE CSCD 2015年第1期22-30,共9页
Online estimation of rotor resistance is essen- tial for high performance vector controlled drives. In this paper, a novel modified neural algorithm has been identified for the online estimation of rotor resistance. N... Online estimation of rotor resistance is essen- tial for high performance vector controlled drives. In this paper, a novel modified neural algorithm has been identified for the online estimation of rotor resistance. Neural based estimators are now receiving active con- sideration as they have a number of advantages over conventional techniques. The training algorithm of the neural network determines its learning speed, stability, weight convergence, accuracy of estimation, speed of tracking and ease of implementation. In this paper, the neural estimator has been studied with conventional and proposed learning algorithms. The sensitivity of the rotor resistance change has been tested for a wide range of variation from -50% to +50% on the stability of the drive system with and without estimator. It is quiet appealing to settle with optimal estimation time and error for the viable realization. The study is conducted extensively for estimation and tracking. The proposed learning algorithm is found to exhibit good estimation and tracking capabilities. Besides, it reduces computational complexity and, hence, more feasible for practical digital implementa- tion. 展开更多
关键词 neural networks back propagation (BP) rotorresistance estimators vector control induction motor
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New adaptive vector control methods for induction motors with simpler structure and better performance 被引量:1
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作者 Kang-Zhi LIU Masashi YOKOO +1 位作者 Keiichiro KONDO Tadanao ZANMA 《Control Theory and Technology》 EI CSCD 2015年第2期173-183,共3页
This paper deals with the vector control, including both the direct vector control(DVC) and the indirect vector control(Id VC),of induction motors. It is well known that the estimation of rotor flux plays a fundamenta... This paper deals with the vector control, including both the direct vector control(DVC) and the indirect vector control(Id VC),of induction motors. It is well known that the estimation of rotor flux plays a fundamental role in the DVC and the estimation of rotor resistance is vital in the slip compensation of the Id VC. In these estimations, the precision is significantly affected by the motor resistances. Therefore, online estimation of motor resistances is indispensable in practice.For a fast estimation of motor resistances, it is necessary to slow down the convergence rate of the current estimate. On the other hand, for a fast estimation of the rotor flux, it is necessary to speed up its convergence rate. It is very difficult to realize such a trade-off in convergence rates in a full order observer.In this paper, we propose to decouple the current observer from the flux observer so as to realize independent convergence rates. Then, the resistance estimation algorithm is applied to both DVC and Id VC. In particular, in the application to Id VC the flux observer needs not be used, which leads to a simpler structure. Meanwhile, independent convergence rates of current observer and flux observer yield an improved performance. A superior performance in the torque and flux responses in both cases is verified by numerous simulations. 展开更多
关键词 induction motor current observer flux observer parameter adaptation indirect vector control direct vector control
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Implementation of Direct Torque Control Scheme for Induction Machines with Variable Structure Controllers 被引量:3
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作者 黎坚 杨耕 +1 位作者 王焕钢 徐文立 《Tsinghua Science and Technology》 SCIE EI CAS 2005年第5期593-597,共5页
A torque control scheme for high-performance induction machine drives was developed to overcome some disadvantages of direct torque control (DTC). In the improved DTC method, the stator flux and the torque controlle... A torque control scheme for high-performance induction machine drives was developed to overcome some disadvantages of direct torque control (DTC). In the improved DTC method, the stator flux and the torque controllers use variable-structure control theory which does not require information about the rotor speed. Space vector modulation is applied to the voltage source inverter to reduce the torque, stator flux, and current ripples. The digital signal processor-based implementation is described in detail. The experimental results show that the system has good torque and stator flux response with small ripples. 展开更多
关键词 variable-structure control torque control induction machines flux estimation
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Nonlinear Control of an Induction Motor Using a Reduced-Order Extended Sliding Mode Observer for Rotor Flux and Speed Sensorless Estimation 被引量:1
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作者 Olivier Asseu Michel Abaka Kouacou +3 位作者 Theophile Roch Ori Zié Yéo Malandon Koffi Xuefang Lin-Shi 《Engineering(科研)》 2010年第10期813-819,共7页
This article proposes an innovative strategy to the problem of non-linear estimation of states for electrical machine systems. This method allows the estimation of variables that are difficult to access or that are si... This article proposes an innovative strategy to the problem of non-linear estimation of states for electrical machine systems. This method allows the estimation of variables that are difficult to access or that are simply impossible to measure. Thus, as compared with a full-order sliding mode observer, in order to reduce the execution time of the estimation, a reduced-order discrete-time Extended sliding mode observer is proposed for on-line estimation of rotor flux, speed and rotor resistance in an induction motor using a robust feedback linearization control. Simulations results on Matlab-Simulink environment for a 1.8 kW induction motor are presented to prove the effectiveness and high robustness of the proposed nonlinear control and observer against modeling uncertainty and measurement noise. 展开更多
关键词 Robust Nonlinear control induction MOTOR Reduced-Order EXTENDED SLIDING Mode Observers parameter estimation
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Randomized Algorithm for Determining Stabilizing Parameter Regions for General Delay Control Systems
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作者 Chao Yu Binh-Nguyen Le +1 位作者 Xian Li Qing-Guo Wang 《Journal of Intelligent Learning Systems and Applications》 2013年第2期99-107,共9页
This paper proposes a method for determining the stabilizing parameter regions for general delay control systems based on randomized sampling. A delay control system is converted into a unified state-space form. The n... This paper proposes a method for determining the stabilizing parameter regions for general delay control systems based on randomized sampling. A delay control system is converted into a unified state-space form. The numerical stability condition is developed and checked for sample points in the parameter space. These points are separated into stable and unstable regions by the decision function obtained from some learning method. The proposed method is very general and applied to a much wider range of systems than the existing methods in the literature. The proposed method is illustrated with examples. 展开更多
关键词 Stabilizing parameter REGIONS Delay control Systems RANDOMIZED Sampling LMI Stability CRITERION Support vector machineS
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基于充电曲线特征的退役动力电池容量估计方法研究
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作者 赵光金 孟高军 +2 位作者 董锐锋 苏令 于鹏飞 《电源技术》 CAS 北大核心 2024年第10期2022-2030,共9页
退役动力电池的容量是划分电池梯次应用场景的关键参数。电池荷电状态(SOC)和健康状态(SOH)估计是设计安全、高效电池管理系统的重要依据。容量参数测量时间尺度长,易受运行工况、工作环境等因素的影响,其估计问题一直是阻碍退役电池大... 退役动力电池的容量是划分电池梯次应用场景的关键参数。电池荷电状态(SOC)和健康状态(SOH)估计是设计安全、高效电池管理系统的重要依据。容量参数测量时间尺度长,易受运行工况、工作环境等因素的影响,其估计问题一直是阻碍退役电池大规模梯次利用的难题之一。以三元锂电池为研究对象,提出一种基于充电曲线电压特征点的退役动力电池容量快速估计方法,将基于1 C下的恒流充电(CC)阶段电压-时间曲线分为两个电压区间,从中提取容量估计特征参数;随后,采用支持向量回归方法构造容量估计模型,并对照实测数据,验证该方法的有效性与准确性。 展开更多
关键词 退役动力电池 充电曲线 特征参数 支持向量机 容量估计
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Application of direct torque control to electric screw presses for speeding up torque response and reducing starting current 被引量:1
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作者 冯仪 《Journal of Chongqing University》 CAS 2009年第2期97-104,共8页
Fast response and stable torque output are crucial to the performance of electric screw presses. This paper describes the design of a direct torque control (DTC) system for speeding up torque response and reducing t... Fast response and stable torque output are crucial to the performance of electric screw presses. This paper describes the design of a direct torque control (DTC) system for speeding up torque response and reducing the starting current of electric screw presses and its application to the J58K series of numerical control electric screw presses with a dual-motor drive. The DTC drive system encompasses speed control, torque reference control, and switching frequency control. Comparison of the DTC dual-AC induction motor drive with corresponding AC servo motor drive showed that for the J58K-315 electric screw press, the DTC drive system attains a higher maximum speed (786 r/min) within a shorter time (1.13 s) during a 250 nun stroke and undergoes smaller rise in temperature (42.0 ℃) in the motor after running for 2 h at a 12 min-1 strike frequency than the AC servo motor drive does (751 r/min within 1.19 s, and 50.6 ℃ rise). Moreover, the DTC AC induction motor drive, with no need for a tachometer or position encoder to feed back the speed or position of the motor shaft, enjoys increased reliability in a strong-shock work environment. 展开更多
关键词 forging machines electric screw press direct torque control flux vector control AC induction motor AC servo motor
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基于模型预测转速估计器的感应电机无传感器控制
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作者 安小宇 梅永祥 +4 位作者 郭磊磊 贾连辉 孙志洪 任成龙 王浩宇 《科学技术与工程》 北大核心 2024年第25期10783-10789,共7页
针对应用于盾构主驱动的感应电机无速度传感器矢量控制系统,传统模型参考自适应系统(model reference adaptive system,MRAS)中的比例积分(proportional integral,PI)自适应率需要人工经验调整,且不能够根据模型变化而变化的问题,提出... 针对应用于盾构主驱动的感应电机无速度传感器矢量控制系统,传统模型参考自适应系统(model reference adaptive system,MRAS)中的比例积分(proportional integral,PI)自适应率需要人工经验调整,且不能够根据模型变化而变化的问题,提出了一种新的预测MRAS速度估计器,用于无传感器感应电机(induction machine,IM)驱动。该估计器基于有限控制集模型预测控制原理。转子转速的计算采用基于搜索的优化算法,保证了在每个采样周期转速调整误差信号最小,避免了使用比例积分控制器。实验结果表明,所提速度估计器在较宽的速度范围内都具有良好的动静态性能。 展开更多
关键词 感应电机 矢量控制 模型预测控制 模型自适应 无传感器控制
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基于改进支持向量机的公共建筑碳排放量估计研究
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作者 吴彬锋 黄剑 +2 位作者 杨世旺 詹子仪 汪力 《环境科学与管理》 CAS 2024年第9期21-25,46,共6页
目前,进行公共建筑碳排放量估计时,存在估计精度低和模型稳定性差的问题,对此,提出基于改进支持向量机的公共建筑碳排放量估计研究方法。首先,分析公共建筑碳排放量的影响因素,并对采集到的公共建筑碳排放数据展开预处理;然后,建立支持... 目前,进行公共建筑碳排放量估计时,存在估计精度低和模型稳定性差的问题,对此,提出基于改进支持向量机的公共建筑碳排放量估计研究方法。首先,分析公共建筑碳排放量的影响因素,并对采集到的公共建筑碳排放数据展开预处理;然后,建立支持向量机模型,并基于人工鱼群算法对支持向量机参数进行优化。最后将优化后的正则化参数和宽度参数代入支持向量机中,得到公共建筑碳排放量。实验结果表明,所提方法的PCC系数最高达到0.81,MAE最低值为0.08,MAPE最低值为19%,由此可见所提方法可精准的完成碳排放量估计,同时具有较高的稳定性。 展开更多
关键词 支持向量机 人工鱼群算法 公共建筑 参数优化 碳排放量估计
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感应电机全阶磁链观测器反馈矩阵增益研究
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作者 王傲能 丁炜 +1 位作者 祝兵权 彭洵 《微特电机》 2024年第8期53-57,共5页
基于自适应全阶磁链观测器的感应电机无编码器矢量控制技术在工业电气传动领域获得广泛应用,其反馈矩阵增益对于提高感应电机控制性能至关重要。根据速度估算系统的稳定性条件推导出反馈增益设计要求,获得特定的反馈增益以保证系统的完... 基于自适应全阶磁链观测器的感应电机无编码器矢量控制技术在工业电气传动领域获得广泛应用,其反馈矩阵增益对于提高感应电机控制性能至关重要。根据速度估算系统的稳定性条件推导出反馈增益设计要求,获得特定的反馈增益以保证系统的完全稳定性。在DSP控制平台上通过欧拉法对全阶磁链观测器进行离散化,利用7.5 kW的感应电机对拖机组对推导的反馈增益有效性进行了实验验证。结果表明,该速度估算系统能保证电机在全调速范围内稳定运行。 展开更多
关键词 感应电机 磁链观测器 反馈矩阵增益 无编码器矢量控制
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An Enhanced Sensorless Control Scheme for PMSM Drives Considering Self-inductance Asymmetry 被引量:1
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作者 Lijian Wu Zekai Lyu +2 位作者 Zekai Chen Jiaming Liu Ying Lu 《CES Transactions on Electrical Machines and Systems》 CSCD 2022年第4期384-392,共9页
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 a... 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 estimation.This paper proposes an enhanced fundamental model based sensorless control strategy for PMSMs with asymmetric inductances.The 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 error.Differing 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 PLL.An improved PLL with a bi-quad filter is proposed to attenuate the arising second harmonic position error and heighten the steady-state accuracy.Then,this position error is used for asymmetric inductance identification and its result is utilized to update the observer model.Furthermore,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 PLL.The effectiveness of the proposed scheme is verified by experimental results. 展开更多
关键词 Inductance asymmetry Permanent magnet synchronous machine(PMSM) Position estimation error Sensorless control
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基于ESPRIT-PSA与LightGBM算法的感应电动机转子断条数目诊断新方法
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作者 许伯强 王晨曦 何俊驰 《华北电力大学学报(自然科学版)》 CAS 北大核心 2023年第5期27-34,共8页
提出一种基于旋转不变信号参数估计技术ESPRIT(Estimation of signal parameters via rotational invariance technique)、模式搜索算法PSA(Pattern search algorithm)与轻型梯度提升机LightGBM(Light gradient boosting machine)结合... 提出一种基于旋转不变信号参数估计技术ESPRIT(Estimation of signal parameters via rotational invariance technique)、模式搜索算法PSA(Pattern search algorithm)与轻型梯度提升机LightGBM(Light gradient boosting machine)结合的感应电动机转子断条数目诊断新方法。模拟了转子断条故障下的瞬时无功功率信号并用其衡量ESPRIT-PSA的性能。结果表明:ESPRIT-PSA只需短时数据就能准确测量瞬时无功功率信号中的转子断条故障特征分量。随后,为解决现有的电机瞬时无功功率信号分析MIRPSA(Motor instantaneous reactive power signal analysis)类方法无法准确诊断转子断条数目的问题,引入LightGBM对转子断条故障进行多分类以准确诊断转子断条数目。最后针对一台异步电动机进行转子断条诊断实验,结果表明:该方法是有效的,并且因将瞬时无功功率作为分析信号而适用于电机低转差率的情况。 展开更多
关键词 异步电动机 转子断条 故障诊断 旋转不变信号参数估计技术 轻型梯度提升机 电机瞬时无功功率信号分析
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Direct field oriented control scheme for space vector modulated AC/DC/AC converter fed induction motor 被引量:3
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作者 F. BENCHABANE A. TITAOUINE +2 位作者 O. BENNIS K. YAHIA D. TAIB 《Frontiers in Energy》 SCIE CSCD 2012年第2期129-137,共9页
This paper investigates a Luenberger flux observer with speed adaptation for a direct field oriented control of an induction motor. An improved method of speed estimation that operates on the principle of speed adapti... This paper investigates a Luenberger flux observer with speed adaptation for a direct field oriented control of an induction motor. An improved method of speed estimation that operates on the principle of speed adaptive flux and current observer has been proposed. An observer is basically an estimator that uses a plant model and a feedback loop with measured stator voltage and current. Simulation results show that the proposed direct field oriented control with the proposed observer provides good performance dynamic characteristics. The induction motor is fed by an indirect power electronics converter. This indirect converter is controlled by a sliding mode technique that enables minimization of harmonics introduced by the line converter, as well as the control of the power factor and DC-link voltage. The robustness of the overall system is studied using simulation for different operating modes and varied parameters. 展开更多
关键词 induction motor direct filed oriented control Luenberger observer estimation space vector modulation (SVM) sliding mode control boost-rectifier
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A predictive controller for induction motors using an unknown input observer for online rotor resistance estimation and an update technique for load torque 被引量:1
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作者 Hanen CHEHIMI Salim HADJ SAD Faouzi MSAHLI 《控制理论与应用(英文版)》 EI CSCD 2013年第3期367-375,共9页
This paper deals with the design of an output feedback predictive controller for induction motors. The fundamental interest of the proposed controller is the capability of decoupling the mechanical speed and the rotor... This paper deals with the design of an output feedback predictive controller for induction motors. The fundamental interest of the proposed controller is the capability of decoupling the mechanical speed and the rotor fluxes, without degradation against the variation of rotor resistance and load torque. Hence, the contribution is to apply two estimation procedures in order to achieve this goal. Namely, an unknown input observer (UIO) is used for the constant time estimation whereas a heuristic solution is exploited for the load torque update. Moreover, rotor flux components are recovered as an unavailable state of the system. Effectiveness of the proposed observers and the performance of the controller are confirmed by simulation results. 展开更多
关键词 Predictive controlle UIO induction motors parameters estimation
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基于定子电流矢量定向的异步电机转子磁链估计器及其应用研究 被引量:26
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作者 张春朋 林飞 +2 位作者 宋文超 高龙 陈寿孙 《中国电机工程学报》 EI CSCD 北大核心 2003年第8期155-158,共4页
异步电机矢量控制的关键问题在于精确地估计转子磁链。然而,传统的磁链估计器的精度会因定子或转子电阻的摄动而降低。文中提出了一种基于定子电流矢量定向的转子磁链估计器。该新型估计器不包含定转子电阻,可以避免电阻参数摄动对估计... 异步电机矢量控制的关键问题在于精确地估计转子磁链。然而,传统的磁链估计器的精度会因定子或转子电阻的摄动而降低。文中提出了一种基于定子电流矢量定向的转子磁链估计器。该新型估计器不包含定转子电阻,可以避免电阻参数摄动对估计精度的影响。开环和闭环的仿真结果表明,该估计器具有相当高的精度,并且在定转子电阻大幅度摄动时,估计结果几乎不受影响,显示出比传统的磁链估计器更强的抗扰动能力。 展开更多
关键词 异步电机 转子磁链估计器 定子 电流矢量定向 矢量控制
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