scholarly journals A novel MTPA and flux weakening method of stator flux oriented control of PMSM

2021 ◽  
Author(s):  
Yuliang Wen ◽  
Hanfeng Zheng ◽  
Fang Yang ◽  
Xiaofan Zeng
Keyword(s):  
Control Strategy ◽  
High Efficiency ◽  
Control Method ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Speed Range ◽  
Low Torque ◽  
Maximum Torque Per Ampere ◽  
Flux Weakening

Abstract Permanent magnet synchronous motor (PMSM) has the advantages of high efficiency, high power density and high reliability. It has been widely used in electric vehicles, rail transit, industrial transmission and other fields. Compared with the traditional PMSM control strategy, the Indirect stator-quantities control (ISC) of low torque ripple induction motor has high dynamic response performance in the whole speed range, with high stability and strong security. However, due to the inherent characteristics of PMSM, there are still some difficulties in applying ISC strategy, such as solving the load angle corresponding to the current torque, realizing the maximum torque per ampere (MTPA) control and flux weakening control method in the stator field oriented control algorithm of PMSM. In this paper, theoretical analysis and discussion are carried out for the above difficulties, and an indirect stator vector control (ISC) method for PMSM is proposed. Finally, combined with the electric drive application platform of electric vehicle, the simulation and experimental results verify that the proposed ISC control strategy of PMSM also has good dynamic and steady-state performance in the whole speed range.

scholarly journals Research on an Improved Sliding Mode Sensorless Six-Phase PMSM Control Strategy Based on ESO

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1292
Author(s):  
Hanying Gao ◽  
Guoqiang Zhang ◽  
Wenxue Wang ◽  
Xuechen Liu
Keyword(s):  
Control System ◽  
Control Strategy ◽  
Sliding Mode ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Estimation Accuracy ◽  
Switching Function ◽  
Motor Speed ◽  
Rotor Position

The six-phase motor control system has low torque ripple, low harmonic content, and high reliability; therefore, it is suitable for electric vehicles, aerospace, and other applications requiring high power output and reliability. This study presents a superior sensorless control system for a six-phase permanent magnet synchronous motor (PMSM). The mathematical model of a PMSM in a stationary coordinate system is presented. The information of motor speed and position is obtained by using a sliding mode observer (SMO). As torque ripple and harmonic components affect the back electromotive force (BEMF) estimated value through the traditional SMO, the function of the frequency-variable tracker of the stator current (FVTSC) is used instead of the traditional switching function. By improving the SMO method, the BEMF is estimated independently, and its precision is maintained under startup or variable-speed states. In order to improve the estimation accuracy and resistance ability of the observer, the rotor position error was taken as the disturbance term, and the third-order extended state observer (ESO) was constructed to estimate the rotational speed and rotor position through the motor mechanical motion equation. Finally, the effectiveness of the method is verified by simulation and experiment results. The proposed control strategy can effectively improve the dynamic and static performance of PMSM.

scholarly journals Comparative Evaluation of Control Techniques of PMSM Drive in Automotive Application

2021 ◽  
Vol 2062 (1) ◽  
pp. 012024
Author(s):  
Rakesh Shriwastava ◽  
Satayjit Deshmukh ◽  
Ashwini Tidke ◽  
Mohan Thakre
Keyword(s):  
Comparative Evaluation ◽  
Control Method ◽  
Simulation Analysis ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Automotive Application ◽  
Control Techniques ◽  
Snubber Circuit ◽  
Low Torque ◽  
Torque Ripples

Abstract This paper deal with comparative evaluation of control techniques of Permanent magnet synchronous motor (PMSM) drive in automotive application is investigated. The FOC, DTC and proposed SVM-DTC with LC-Snubber circuit are presented. In SVM-DTC, this reduces low torque ripple by using space vector modulated. The parameters of FOC, DTC and proposed SVM-DTC with LC-Snubber method are studied by simulation. The simulation analysis of control method is investigated in terms of speed, current and torque ripples It was observed that the proposed method upgrade the performance of PMSM drive in respect to speed, current ripples, and torque responses

scholarly journals Performance Improvement of Concentrated-Flux Type IPM PMSM Motor with Flared-Shape Magnet Arrangement

2020 ◽  
Vol 10 (17) ◽  
pp. 6061
Author(s):  
Keun-Young Yoon ◽  
Soo-Whang Baek
Keyword(s):  
Permanent Magnet ◽  
Performance Improvement ◽  
High Efficiency ◽  
Acoustic Noise ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Proposed Model ◽  
Interior Permanent Magnet ◽  
Low Torque ◽  
Rotor Structure

This study demonstrates that the use of a flared-shape rotor structure in interior permanent magnet (IPM) permanent magnet synchronous motor (PMSM) yields better performance than the basic IPM PMSM motor, using a spoke structure with ferrite magnets. To concentrate the effective magnetic flux, the proposed rotor structure is composed of a number of ferrite magnets, which are inserted in a flared shape in the rotor core. This paper shows the comparison with the analysis results of 2D finite element method (FEM), and it is shown that the proposed IPM PMSM motor can be an effective substitute for the basic IPM PMSM motor, which requires low torque ripple and high efficiency. In particular, the proposed flared IPM PMSM motor has lower pulsation of torque and superior efficiency, as well as lower acoustic noise and vibration, compared to the basic IPM PMSM motor. To verify the performance improvement of the proposed model, a prototype of the proposed model was manufactured. It was experimentally confirmed that the proposed model has lower torque ripple and higher efficiency than the basic model. Based on this performance improvement, the proposed flared IPM PMSM motor is suitable for electric vehicles and home appliances.

Fault-tolerant model predictive control of six-phase permanent magnet synchronous hub motors

2021 ◽  
pp. 1-24
Author(s):  
Xiaodong Sun ◽  
Feng Cai ◽  
Xiang Tian ◽  
Minkai Wu
Keyword(s):  
Permanent Magnet ◽  
Fault Tolerant ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Control Mode ◽  
Multiple Control ◽  
Cascade Structure ◽  
Low Torque ◽  
Multi Phase

Permanent magnet synchronous hub motors (PMSHMs) have been gradually introduced into the applications of electric vehicles. On this basis, the six-phase motor has the characteristics of high reliability, high power density and low torque ripple. And its fault tolerance is a large advantage compared with the three-phase motor. The multi-phase permanent magnet synchronous motor is redundant due to the number of phases. When the motor fails, it does not have to stop running, merely adjust its control mode and enter the fault-tolerant compensation control algorithm to resume the operation of the system. The FCS-MPC algorithm can replace the cascade structure in the traditional control and eliminate the modulation module. This makes it have good steady-state performance. The speed response is also improved. It can be combined with multiple control objectives with strong flexibility by simply changing the objective function. The prediction model is compensated. Finally, the experimental results show the effectiveness of this method.

Design of Fuzzy Self-Tunning Controller for Permanent Magnet Synchronous Motor

2013 ◽  
Vol 732-733 ◽  
pp. 1105-1109
Author(s):  
Xiao Feng Peng ◽  
Peng Xu ◽  
Li Zhang ◽  
Wen Lue Wan
Keyword(s):  
Permanent Magnet ◽  
High Performance ◽  
High Efficiency ◽  
Control Method ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Pi Controller ◽  
Pi Control ◽  
Integral Parameter ◽  
Permanent Magnet Synchronous Motors

Permanent magnet synchronous motors(PMSM) as a representative of high efficiency motor was being used widely in the area of medium and small-sized power, high-accuracy,high reliability and wide-scope speed governing servo system.Otherwise,because traditional PI controller can not satisfy the high-performance of PMSM servo system,Fuzzy self-tuning PI(Fuzzy-PI) control method was used in this system, and proportion and integral parameter of PI controller is optimized by fuzzy logic.By simulation experiment, it was proved that Fuzzy-PI method had more steady and less q-axis current pulse to PI control in the transition procedure of PMSM governing.

scholarly journals Fault-Tolerant Control Strategy for 12-Phase Permanent Magnet Synchronous Motor

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3462 ◽  
Author(s):  
Hanying Gao ◽  
Wen Zhang ◽  
Yu Wang ◽  
Zhuo Chen
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
Fault Tolerant ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Fault Tolerant Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Open Circuit ◽  
Magnetomotive Force

Multi-phase motors have attracted increasing attention in fields seeking high reliability, such as electric vehicles, ships, and rail transit, as they exhibit advantages, such as high reliability and fault tolerance. In this study, we consider a 12-phase permanent magnet synchronous motor (PMSM). First, a mathematical model of the 12-phase PMSM in the static coordinate system is established and the model is simplified according to the constraint condition of neutral point isolation. Second, according to the principle of invariant magnetomotive force under normal and fault conditions, two optimal control strategies of winding current, i.e. maximum torque output (MTO) and minimum copper consumption (MCC), are proposed. For a single-phase open-circuit fault, two optimization methods are used to reconstruct the residual phase current, such that the motor can maintain normal torque output and exhibit lower torque ripple under the fault state. Finally, system simulation and experimental research are conducted; the results verify the accuracy and feasibility of the fault-tolerant control strategy of the 12-phase PMSM proposed in this paper.

scholarly journals Co-Simulation and Modeling of PMSM Based on Ansys Software and Simulink for EVs

2021 ◽  
Vol 13 (1) ◽  
pp. 4
Author(s):  
Tewodros Kassa Mersha ◽  
Changqing Du
Keyword(s):  
High Efficiency ◽  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Slight Modification ◽  
Simulation Method ◽  
Torque Ripple ◽  
Manufacturing Cost ◽  
Ansys Software ◽  
Real Time Control ◽  
Motor Model

Electric vehicles (EVs) should have an electrical motor with high efficiency, high power density, and a wider constant power operating region, as well as ease of control and inexpensive manufacturing cost. To achieve these requirements, a real-time control-oriented electric motor model is essential. A co-simulation method based on Ansys software (Maxwell and Twin Builder) and MATLAB/Simulink for Permanent Magnet Synchronous Motor (PMSM) model is presented, which can improve the design of the PMSM and evaluate its performance by Rotating Machine Expert (RMxprt) when any slight modification of parameters and output inaccuracy occur. The PMSM drive system under different input reference speeds was analyzed by simulation, which testified that co-simulation of the magnetic and electrical domain is necessary to capture all applicable effects. The simulation results show the good feasibility of the motor model and control method, which achieves the desired effect and fast response with a small torque ripple as well. Such a developed prototype allows both accurate and simple characterization and optimization to be made possible.

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