Speed-Sensorless Direct Torque Control of Bearingless Permanent Magnet Synchronous Motor Based on Extended Kalman Filter

2010 ◽  
Author(s):  
Xianxing Liu ◽  
Chao Wang ◽  
Li Cao ◽  
Qing Li ◽  
Weiran Wang
Keyword(s):  
Kalman Filter ◽  
Permanent Magnet ◽  
Extended Kalman Filter ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Torque Control ◽  
Speed Sensorless

A Novel Sensorless Direct Torque Control Technique of Interior Permanent Magnet Synchronous Motor

2017 ◽  
Author(s):  
Saita Gurung ◽  
Xin Wang
Keyword(s):  
Kalman Filter ◽  
Permanent Magnet ◽  
Extended Kalman Filter ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Torque Control ◽  
Control Technique ◽  
Interior Permanent Magnet

This paper presents a novel sensorless direct torque control of interior permanent magnet synchronous motor with resilient extended Kalman filter. In comparison to the field-oriented control scheme, direct torque control has advantages due to its simplicity (without Park’s transform or space-vector pulse-width-modulation), excellent transient response, high reliability and robustness. The interior permanent magnet synchronous motors have been extensively used in industrial applications due to their high efficiency, large torque to weight ratio, high performance and high reliability. Traditionally, the rotor position and speed of rotation are directly fed back through encoders or resolvers. In order to provide a more reliable and cost saving approach, the sensorless direct torque control of permanent magnet synchronous motor technique is proposed to eliminate the need of using encoders or resolvers. A novel nonlinear estimator, the resilient extended Kalman filter is proposed, which shows superior estimation accuracy compared with other estimation approaches such as extended Kalman filter. Computer simulation and DSP hardware implementation have been conducted to show the superior performance of the proposed approach.

Study on speed sensorless system of permanent magnet synchronous motor based on improved direct torque control

2021 ◽  
pp. 014233122110629
Author(s):  
Xiaoxin Hou ◽  
Mingqian Wang ◽  
Guodong You ◽  
Jinming Pan ◽  
Xiating Xu ◽  
...  
Keyword(s):  
Control System ◽  
Permanent Magnet ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Switching Frequency ◽  
Speed Sensorless ◽  
Stator Resistance

The traditional direct torque control system of permanent magnet synchronous motor has many problems, such as large torque ripple and variable switching frequency. In order to improve the dynamic and static performance of the control system, a new torque control idea and speed sensorless control scheme are proposed in this paper. First, by deriving the equation of torque change rate, an improved torque controller is designed to replace the torque hysteresis controller of the traditional direct torque control. The improved direct torque control strategy can significantly reduce the torque ripple and keep the switching frequency constant. Then, based on the improved direct torque control and considering the sensitivity of the stator resistance to temperature change, a speed estimator based on the model reference adaptive method is designed. This method realizes the stator resistance on-line identification and further improves the control precision of the system. The performance of the traditional direct torque control and the improved direct torque control are compared by simulation and experiment under different operating conditions. The simulation and experimental results are presented to support the validity and effectiveness of the proposed method.

The Implementation of Permanent Magnet Synchronous Motor Direct Torque Control

2013 ◽  
Vol 712-715 ◽  
pp. 2757-2760
Author(s):  
Jun Li Zhang ◽  
Yu Ren Li ◽  
Long Fei Fu ◽  
Fan Gao
Keyword(s):  
Coordinate System ◽  
Permanent Magnet ◽  
Control Method ◽  
Block Diagram ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Two Phase

In order to deeply understand the characteristics of the permanent magnet synchronous motor direct torque control method, its mathematical models were established in the two-phase stationary coordinate system, the two-phase synchronous rotating coordinate system, and x-y stator synchronous rotating coordinate system. The implementation process of direct torque control method in varied stator winding connection was analyzed in detail. In order to improve the speed and torque performance of the permanent magnet synchronous motor, the direct torque control block diagram and the space voltage vector selection table were given. Finally, the summary and outlook of reducing torque ripple in the permanent magnet synchronous motor direct torque control methods.

Sensorless Grey Prediction Fuzzy Direct Torque Control for High-Speed Permanent Magnet Synchronous Motor

2012 ◽  
Vol 220-223 ◽  
pp. 1040-1043
Author(s):  
Hong Cui ◽  
You Qing Gao
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Performance ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Torque Control ◽  
Adjustment Process ◽  
Grey Prediction ◽  
The Stability

High-speed permanent magnet synchronous motor (PMSM) is more and more widely applied in high precision processing and high-performance machines. It is very important to research practical control strategy for the stability operation of the high-speed PMSM. The strategy of sensorless grey prediction fuzzy direct torque control (DTC) is proposed which is suitable for high-speed PMSM control system. The method of prediction fuzzy control based on DTC is used to gain the flux, torque and flux oriented angle through the prediction model of the motor parameters. The best control scheme is gained by fuzzy reasoning to overcome the lag on the system making the adjustment process stable and realizing accurate predictive control. Thereby, the dynamic response of the system, anti-disturbance capability and control accuracy can be improved.

A Review of Control Strategies for Permanent Magnet Synchronous Motor Used in Electric Vehicles

2013 ◽  
Vol 321-324 ◽  
pp. 1679-1685
Author(s):  
Jun Li ◽  
Jia Jun Yu ◽  
Zhenxing Chen
Keyword(s):  
Permanent Magnet ◽  
Intelligent Control ◽  
Control Strategies ◽  
External Disturbance ◽  
Permanent Magnet Synchronous Motor ◽  
Control Variable ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Theoretical Background ◽  
Torque Control

This paper mainly reviews the development of permanent magnet synchronous motor drive system. It presents several approaches of PMSM control strategies, including control strategies based on classical control, modern control and intelligent control. Theoretical background briefly describes the properties of these control techniques. Among these control strategies, vector control and direct torque control are considered as the mature methods for PMSM motors control currently. Advanced control strategies, with adaptive control, variable structure control and intelligent control included, improve the performance of PMSM in some respects, such as variations of plant parameters sensitivity, external disturbance and so on. It shows that the researches in this area are still a popular research topic. Finally, this paper prospected the foreground of the control strategies for PMSM.

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