AC Motor Speed Control Double Close Loop Cascade Fuzzy PI Controller Design

2012 ◽  
Vol 516-517 ◽  
pp. 1571-1574
Author(s):  
Shuang Shuang Li ◽  
Yong Xin Liu
Keyword(s):  
Controller Design ◽  
Asynchronous Motor ◽  
Pi Controller ◽  
Regulation System ◽  
Motor Speed ◽  
Speed Regulation ◽  
Self Tuning ◽  
Fuzzy Pi Controller ◽  
The Difference ◽  
Fuzzy Parameter

Cascade Speed Regulation System has the nonlinear characteristics and whose structure parameters are variable easily. Fuzzy control theory which based on conventional Cascade Speed Regulation System is introduced into such system. An asynchronous motor model is built, and a fuzzy parameter self-tuning controller is designed in this paper, the controller is simulated in Matlab, The simulation result shows the difference between the conventional PI controller and the fuzzy parameter self-tuning PI controller. From these simulation results, all performance indexes of the fuzzy PI controller with parameters self-tuning are vastly superior to those of the conventional PI controller.

Application of Fuzzy-PI Controller in the Asynchronous Motor

2014 ◽  
Vol 1070-1072 ◽  
pp. 1210-1215
Author(s):  
Guang Zhong Li
Keyword(s):  
Asynchronous Motor ◽  
Pi Controller ◽  
Control Effect ◽  
Excitation Current ◽  
Pi Regulator ◽  
Large Fluctuations ◽  
Speed Regulator ◽  
Self Tuning ◽  
Fuzzy Pi Controller ◽  
Control Modules

This paper proposes an induction motor variable frequency speed control system based on fuzzy-PI self-tuning. The system includes coordinate transformation modules, vector control modules, space vector pulse width modules, fuzzy-PI self-tuning speed regulator, excitation current and torque current PI regulator. Because the speed regulator controlled by the fuzzy-PI self-tuning has better control effect than traditional PI. The performance can be reflected by the shorter response time, smaller overshoot. In addition, when the load torque changes, the electromagnetic torque changes more smoothly and does not have large fluctuations.

SVPWM Vector Control Speed Regulation System of Asynchronous Motor Based on DSP

2013 ◽  
Vol 373-375 ◽  
pp. 1294-1298
Author(s):  
Jin Li
Keyword(s):  
Vector Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Asynchronous Motor ◽  
Torque Ripple ◽  
Low Noise ◽  
Regulation System ◽  
Motor Speed ◽  
Speed Regulation

Space vector pulse width modulation (SVPWM) is a method to control the AC asynchronous motor. SVPWM technology applied in AC speed regulation system can not only improve the shortcoming of low voltage utilization in the pulse-width modulation (PWM) technology, but have little torque ripple and low noise advantages. In this paper, a SVPWM vector control AC asynchronous motor speed regulation system employing a core TMS320LF2407A-type DSP chip was presented, and simulated the speed regulation system by MATLAB SIMULINK. The obtained simulation results indicate that the proposed speed regulation system has excellent dynamic and static performance, thus SVPWM control technology of asynchronous motor based on DSP has been implemented.

A simplified composite current-constrained control for permanent magnet synchronous motor speed-regulation system with time-varying disturbances

2019 ◽  
Vol 42 (3) ◽  
pp. 374-385 ◽  
Author(s):  
Zhenxing Sun ◽  
Yangkun Zhang ◽  
Shenghui Li ◽  
Xinghua Zhang
Keyword(s):  
Permanent Magnet ◽  
Controller Design ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Regulation System ◽  
Current Loop ◽  
Constrained Control ◽  
Motor Speed ◽  
Speed Regulation ◽  
Property Loss

Under the single-loop structure, the problem of overcurrent protection for permanent magnet synchronous motor (PMSM) is investigated in this paper. Due to the combination of speed loop and current loop, the q-axis current become a state of PMSM control system, instead of the output of current loop in the cascade control. As a consequence, the conventional controllers can not restrict the q-axis current into a safe zone. But an oversize transient current may lead to damage of hardwares and property loss. To this end, a new current-constrained controller is proposed to deal with the issue of over-current protection. Different from previous methods of state constraints, the effects of disturbance is taken into account of controller design. A reduced-order generalized proportional integral observer (RGPIO) is adopted to estimate the uncertainties and disturbances. Our method can be considered as a composition of current-constrained control plus feed-forward compensation based on RGPIO. A rigorous stability analysis for the closed-loop system is presented. Compared with the conventional PID controller, the proposed method not only limits q-axis current to a safe range, but also has a good anti-disturbance ability. The feasibility and efficiency of the proposed method is validated by both simulation and experimental results.

scholarly journals Twin Channel of Speed Control System Based on DSP

2011 ◽  
Vol 2-3 ◽  
pp. 447-451
Author(s):  
Bin Li ◽  
Zheng Feng Cao ◽  
Jin Ping Hong
Keyword(s):  
Control System ◽  
Frequency Conversion ◽  
Speed Control ◽  
Regulation System ◽  
Motor Speed ◽  
The Core ◽  
Speed Regulation ◽  
Speed Control System ◽  
Complex Algorithm ◽  
Exchange Data

A microprocessor as the core of the digital controller has become one of the major features AC speed regulation system in modern. Based on DSP as the core of the speed control system，it can realize complex algorithm. At the same time, it can achieve the diagnosis of system’s fault, and the self-setting of parameters controlled, etc. Thus it can make the motor speed control system have higher performance. This paper introduces the motor speed control system which consists of three DSP. This system is able to adjust two Frequency conversion motor. Division of work to the DSP is according to the function of DSP. Inter-DSP makes use of dual-port RAM to exchange data and communicate. They work together to achieve and improve the performance of the control system.

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