Sliding Mode Current Observer for Sensorless Vector Control of PMSM

2011 ◽  
Vol 304 ◽  
pp. 191-195
Author(s):  
Yong Hua Zhu ◽  
Wen Tong Ye ◽  
Yong Chen
Keyword(s):  
Sliding Mode ◽  
External Disturbance ◽  
Permanent Magnet Synchronous Motor ◽  
Variable Structure ◽  
Control Law ◽  
Sign Function ◽  
Sensorless Vector Control ◽  
Equivalent Control ◽  
Static Performance ◽  
Mode A

The sensorless control system of permanent magnet synchronous motor is a system with an uncertainty and external disturbance. This paper uses the control law of equivalent control matched with switching control according to the theory of variable structure with sliding mode control, and achieves a robust control of the uncertainty and external disturbance. In order to eliminate the adverse effect caused by the chattering of the sliding mode, a saturation function of the quasi-sliding mode is used instead of the traditional sign function. Simulations and experiments prove that this control technology has a nicer dynamic and static performance.

High-Performance Sensorless Control of PMSM Based on Sliding Mode Current Observer

2011 ◽  
Vol 383-390 ◽  
pp. 329-336
Author(s):  
Sheng Wen Fan ◽  
Hai Shan Liu
Keyword(s):  
High Performance ◽  
Control Method ◽  
Sliding Mode ◽  
External Disturbance ◽  
Permanent Magnet Synchronous Motor ◽  
External Interference ◽  
Equivalent Control ◽  
Static Performance ◽  
Exponential Reaching Law ◽  
Vector Control System

The sensorless vector control system of permanent magnet synchronous motor (PMSM) is a system with uncertainty and external disturbance. According to sliding mode control theory, this paper realized robust control of the uncertainty and external interference by use of the equivalent control matched with switching control. Meanwhile, in order to eliminate the adverse effect produced by the chattering of the sliding mode, this paper adopts the saturation function of quasi-sliding mode instead of the traditional sign function. Furthermore, the exponential reaching law is used to further weaken the chattering and to ensure the rapidity of the system. Simulation and experimentation show that this control method has good dynamic and static performance.

Research of Sliding Mode Control with Integral Compensator for Permanent Magnet Linear Synchronous Machine

2013 ◽  
Vol 416-417 ◽  
pp. 646-651
Author(s):  
Ying Quan Liu ◽  
Dong Ru Sun ◽  
Yun Yue Ye
Keyword(s):  
Permanent Magnet ◽  
Sliding Mode ◽  
External Disturbance ◽  
Control Object ◽  
Variable Structure ◽  
Synchronous Machine ◽  
Equivalent Model ◽  
Model Parameters ◽  
State Equations ◽  
Equivalent Control

In order to solve the high-frequency chattering and low anti-disturbance in conventional variable structure control (VSC) method with sliding mode, a compensator scheme of introducing integral structure before control object is proposed. Firstly, the position loop VSC state equations and equivalent control model are established based on the analyses of the mathematical model of permanent magnet linear synchronous machine (PMLSM). Then it presents a more accurate and comprehensive method to determine the control parameters and the equivalent model parameters. Computer simulation with the motor parameters of a flat type PMLSM verifies the feasibility and effectiveness of the compensator structure. Compared with the conventional VSC, the proposed structure can solve the vibration caused by external disturbance and load variations, and attenuate the chattering effectively. It is concluded through further analyses that the proposed structure can overcome the system oscillations generated by mover mass and permanent magnet flux linkage, and improve the robustness and control precision of the system.

Research on Sensorless Control of PMSM Based on Sliding Mode Observer

2014 ◽  
Vol 668-669 ◽  
pp. 637-640
Author(s):  
Zhi Yu Huang ◽  
Xi Zheng
Keyword(s):  
Sliding Mode ◽  
Sensorless Control ◽  
Permanent Magnet Synchronous Motor ◽  
Variable Structure ◽  
Sliding Mode Observer ◽  
Sign Function ◽  
Structure Control ◽  
Rotor Position ◽  
Position Signal ◽  
Sliding Mode Variable Structure

In the foundation of the realization of sensorless control of permanent magnet synchronous motor(PMSM) based on the traditional sliding mode observer, the paper focuses on the research on the chattering impacts on the estimation of rotor position and speed, which are caused by the sliding mode variable structure control. To weaken the chattering, the paper proposes two kinds of methods. First, the paper designs the saturation function with boundary layer thickness variable instead of sign function in the traditional sliding mode observer. Meanwhile, let the phase-locked loop (PLL) combine to the sliding mode observer, and construct the rotor position signal detection unit. Finally, the paper verifies the correctness and effectiveness of the proposed methods through the theoretical analysis and simulation.

scholarly journals Forced dynamics control of an actuator with linear PMSM

2009 ◽  
Vol 22 (2) ◽  
pp. 183-195
Author(s):  
Ján Vittek ◽  
Vladimir Vavrús ◽  
Jozef Buday ◽  
Jozef Kuchta
Keyword(s):  
Control System ◽  
Control Method ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Control Law ◽  
Flux Vector ◽  
Stator Current ◽  
Current Vector ◽  
Filtering Effect ◽  
Speed Response

The paper presents design and verification of Forced Dynamics Control of an actuator with linear permanent magnet synchronous motor. This control method is a relatively new one and offers an accurate realization of a dynamic speed response, which can be selected for given application by the user. In addition to this, the angle between stator current vector and moving part flux vector is maintained mutually perpendicular as it is under conventional vector control. To achieve prescribed speed response derived control law requires estimation of an external force, which is obtained from the set of observers. The first observer works in pseudo-sliding mode and observes speed of moving part while the second one has filtering effect for elimination of the previous one chattering. The overall control system is verified by simulations and experimentally. Preliminary experiments confirmed that the moving part speed response follows the prescribed one fairly closely.

scholarly journals Robust Fuzzy Sliding Mode Controller for Discrete Nonlinear Systems

2008 ◽  
Vol 3 (1) ◽  
pp. 6 ◽  
Author(s):  
Hafedh Abid ◽  
Mohamed Chtourou ◽  
Ahmed Toumi
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Fuzzy Model ◽  
Uncertain System ◽  
Control Technique ◽  
Control Law ◽  
Mode Control ◽  
Equivalent Control ◽  
Fuzzy Sliding Mode ◽  
Discrete Nonlinear Systems

In this work we are interested to discrete robust fuzzy sliding mode control. The discrete SISO nonlinear uncertain system is presented by the Takgi- Sugeno type fuzzy model state. We recall the principle of the sliding mode control theory then we combine the fuzzy systems with the sliding mode control technique to compute at each sampling time the control law. The control law comports two terms: equivalent control law and switching control law which has a high frequency. The uncertainty is replaced by its upper bound. Inverted pendulum and mass spring dumper are used to check performance of the proposed fuzzy robust sliding mode control scheme.

scholarly journals Variable Structure Compensation PID Control of Asymmetrical Hydraulic Cylinder Trajectory Tracking

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Difei Liu ◽  
Zhiyong Tang ◽  
Zhongcai Pei
Keyword(s):  
Trajectory Tracking ◽  
Pid Control ◽  
Control Method ◽  
Sliding Mode ◽  
Variable Structure ◽  
Hydraulic Cylinder ◽  
Control Value ◽  
Equivalent Control ◽  
Asymmetrical Hydraulic Cylinder ◽  
The Stability

A novel variable structure compensation PID control, VSCPID in short, is proposed for trajectory tracking of asymmetrical hydraulic cylinder systems. This new control method improves the system robustness by adding a variable structure compensation term to the conventional PID control. The variable structure term is designed according to sliding mode control method and therefore could compensate the disturbance and uncertainty. Meanwhile, the proposed control method avoids the requirements for exact knowledge of the systems associated with equivalent control value in SMC that means the controller is simple and easy to design. The stability analysis of this approach is conducted with Lyapunov function, and the global stability condition applied to choose control parameters is provided. Simulation results show the VSCPID control can achieve good tracking performances and high robustness compared with the other control methods under the uncertainties and varying load conditions.

Enhanced Fractional Order Sliding Mode Approach for Maximum Power Tracking of Five-phase PMSG based WECS

2021 ◽  
Vol 12 (5) ◽  
pp. 918-929
Author(s):  
Salah Eddine Rhaili Et. al.
Keyword(s):  
Power Systems ◽  
Fractional Order ◽  
Sliding Mode ◽  
Control Function ◽  
Dynamic Performance ◽  
Electrical Power ◽  
Variable Structure ◽  
Synchronous Generator ◽  
Lyapunov Theory ◽  
Static Performance

Variable structure strategies have shown an efficient performance in controlling nonlinear electrical power systems by reason of its strength to handle perfectly the unmodeled system dynamics. In this study, with the exponent reaching law, a robust enhancement method of sliding mode controller (SMC) based on a nonlinear fractional order sliding surface that consists of both fractional differentiation and integration is proposed and applied to control a high-power multiphase permanent magnet synchronous generator based direct-driven Wind Energy Conversion System (WECS), in order to improve the energy efficiency and reduce the produced chattering phenomenon of conventional SMC . Moreover, a new smooth and derivable nonlinear switching control function is applied to replace the traditional non-derivable nonlinear control law, to improve dynamic performance, static performance, and robustness of the system. The proposed strategy stability is investigated under Lyapunov theory. A comparative simulation of the new proposed approach with the conventional SMC and PI controller display the excellent performance, stability and high robustness of FOSMC, by improving the system efficiency up to 98.66%, compared to conventional SMC with 91,14%, while the PI control achieves 86, 2%.

Research on Attitude Law of Mass Moment Missile Based on Mulriple Control

2011 ◽  
Vol 181-182 ◽  
pp. 919-925
Author(s):  
Peng Wu ◽  
Qi Chao Chen ◽  
Jiao Ding Ning
Keyword(s):  
Attitude Control ◽  
Variable Structure ◽  
Control System Design ◽  
Control Law ◽  
Attitude Control System ◽  
Sign Function ◽  
Structure Control ◽  
System A ◽  
Mass Moment ◽  
Simulation Results

Aimed at characteristics of mass moment of missiles in exo-atmosphere, it’s inferred that 6-DOF mathematical model based on mass moment controlling stabilities on three axes. Considering the problem of harmoniously controlling two moving masses, moving mass based non-linear theorem was used to solve a series of problems met in attitude control system design. In order to weaken the chattering of the system, a saturation function is introduced to substitute for Sign function to improve the variable structure control law so that the chattering can be depressed. The simulation results illustrate the efficiency of this method.

Research and Design of Permanent Magnet Synchronous Motor Vector Control for Electric Vehicle

2014 ◽  
Vol 668-669 ◽  
pp. 629-632 ◽  
Author(s):  
Zhi Yu Huang ◽  
Jun Bing Chen
Keyword(s):  
Vector Control ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Variable Structure ◽  
Parameter Perturbation ◽  
External Disturbances ◽  
Vehicle Performance ◽  
Structure Control ◽  
Sliding Mode Variable Structure ◽  
Research And Design

As the electric vehicles usually run under complex conditions of city road, there always exists parameter perturbation of motor, which will affect the vehicle performance. To solve the problem, an improved sliding mode variable structure control (SMC) method which combines continuous function and reaching law has been proposed in this paper. Then the improved vector control algorithm’s codes are generated automatically in the MMC (Model-based Motor Control) platform. The results show that the improved SMC algorithm has small chattering and strong robustness to the parameter perturbation and the external disturbances.

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