Control System Of Asynchronous Motor Research Articles

Alternating Current Asynchronous Motor Control System based on Vector Control

Alternating current asynchronous motor has the advantages of simple structure, reliable operation, and low cost. It is especially suitable for the wheel drive system of large electric drive dump truck, and the nonlinear characteristics put forward higher requirements for the control system. According to the operation characteristics of a vehicle AC asynchronous motor, the characteristic parameter description equation was obtained. Based on the principle of vector control, the control system was designed, the analysis model of the control system was built based on Simulink, and the model speed and torque control were verified. The single and double step speed, slow acceleration and load operation was selected to test, and the changes of speed, output torque and other parameters were obtained. With reference to the actual vehicle characteristics, the test bench of asynchronous AC motor control system was built, and the characteristics of the control system under different load conditions were selected for verification. The analysis results show that the motor runs well in the control system built by vector control. Under different operating conditions, the system responds quickly, the parameter fluctuation is small, and the overall stability is maintained. Under the action of the control system, when operating below the fundamental frequency, the constant speed regulation operation is realized through voltage compensation. When the fundamental frequency is exceeded and the load condition is met, the system realizes constant power speed regulation. The maximum efficiency of the motor is more than 90%, which increases with the increase of load. The control system makes the motor show good advantages. It shows the reliability of the control model and provides a reference for this kind of design research.

Research on the SCVM Flux Error MRAS Observer of Asynchronous Motor Based on SMC

Aiming at the sensorless control system of asynchronous motor, a MRAS observer method for asynchronous motor SCVM flux error based on sliding mode control (SMC) is proposed. This method uses the SCVM voltage model flux error to form a MRAS observer to identify the speed and estimate the rotor flux, and a sliding mode speed controller is designed to replace the traditional PI speed controller. The algorithm can reduce the overshoot of the dynamic response of the system speed at medium and high speeds, shorten the time to enter the steady state value, and enhance the robustness of the system. Simulation results show the effectiveness of the algorithm.

Comparison of dynamic characteristics of the ideal field oriented control model and its based on act (automated control theory) real analogue

This article is dedicated to the accuracy of modeling the dynamic characteristics of a field oriented control model. The field oriented control model is based on automatic control theory and using the parameters of a real electric motor. As a result of the simulation, several dynamic characteristics were obtained. The comparison of these characteristics with the dynamic characteristics of the assembled system of field oriented control of a real electric motor is carried out. It is concluded that the operation of the field oriented control model with a certain error corresponds to the operation of the field oriented control system of a synchronous electric motor.

The experience of creating an asynchronous motor control system for the hydraulic drive of a crane-manipulator

The study introduces a mathematical model of an asynchronous motor control system for a hydraulic drive of a crane-manipulator, the model being implemented in the Matlab Simulink package. The choice of the frequency of the pulse-width modulation and the components of the controlled electric drive depends on the load diagram and the characteristics of a new electric motor. The paper emphasizes some features of this choice and also demonstrates the output characteristics of the motor powered by a sinusoidal voltage source and a frequency converter, which is a source of modulated pulse-width voltage

Methods for controlling a linear asynchronous motor

This article describes the case of one of possible method of controlling a linear asynchronous motor (LAM) with a controlled normal component of the force of interaction between an inductor and a reactive bus. It is shown that the normal force in a unilateral linear asynchronous motor can affect significantly the operation of devices and systems on which a motor is installed. This normal force can attract an inductor to a reactive bus or repel it from a reactive bus. For the model of a motor, which is represented by four zones, namely, an inductor, an air gap, a conductive bus, and a steel core of a reactive bus, the analytical expressions for the calculation of the components of a magnetic field in an air gap were obtained. The effect of the longitudinal and transverse edge effects in the considered plane model of a motor is not considered. The expressions for the determination of the specific tangential and normal forces per area unit were found. It is shown that, under a change in the slide from negative to positive values, the tangential force changes similarly to the electromagnetic torque of a conventional asynchronous motor with a rotating rotor. Under a change in the slide, the normal force can attract an inductor to a reactive bus or repel it from a reactive bus. The force of attraction reaches the highest values under a zero slide. The slide under which the normal force is equal to zero is determined only by the pole pitch and the conductivity of material of a reactive bus and provides the operation of a motor at the highest power factor. It is proposed to use the measured normal force value as a parameter for the construction of a traction linear asynchronous motor-control system.

The Vector Control System of Induction Motor Based on Fuzzy Control

Classical control theory method often cannot obtain good static and dynamic performance in speed control system of asynchronous motor that is multivariable, nonlinear and strong coupling. However, with the application of modern control theory, it can effectively improve the operating performance of system in a complicated environment. This paper introduces the basic principle of vector control system and establishes the simulation model of vector control system of asynchronous motor. Meanwhile, according to fuzzy control theory, this paper shows a design of fuzzy controller and it is applied to the vector control system of speed adjusting module. Finally, it uses Matlab/Simulink to simulate and it verifies that Fuzzy vector control system response faster has better stability and stronger robust performance compared to the traditional vector control. Key words: induction motor; vector control; fuzzy control

Research on DSP-Based Asynchronous Motor Control Technology

Motor in a variety of electrical transmission and position servo system occupies an extremely important position. After the DSP technology being applied to the motor control, the unification of the hardware and the flexibility of the software can be combined. Take the brushless DC motor for example, obtained the design scheme of the DSP-based asynchronous motor control system. With its 32 bit fixed point DSPTMS320F2812 as the core design of the hardware system, we wrote the system software, debug the motor control system and the results show that the system achieves the expected effect. The results of the research can be applied to brushless DC motor and other motor control, it will have a wide application prospects.

Modeling and Simulation of Asynchronous Motor in <sup><i>αβ</i></sup> Coordinate System Based on Matlab

Asynchronous motor has simple structure, low cost, comparable to DC motor control performance when using the vector control technology. This paper focuses on the three-phase asynchronous motor which account for most of the proportion of the AC machines. Firstly, this paper builds the vector control system of asynchronous motor, then deduces the mathematical models of asynchronous motor based on coordinate system. At last the paper builds the simulation model of asynchronous motor based on coordinate system in Matlab/Simulink, and the paper gives and analyzes the simulation results. The simulation results verify the correctness of the theory of asynchronous motor based on coordinate system.

Research on DSP-based Asynchronous Motor Control Technology

The Motor in a variety of electrical transmission and position servo system occupies an extremely important position. After the DSP technology being applied to the motor control, the unification of the hardware and the flexibility of the software can be combined. Take the brushless DC motor for example, studied the mathematical model and the structure of the motor control system, also obtained the design scheme of the DSP-based asynchronous motor control system. With TI's 32 bit fixed point DSPTMS320F2812 as the core design of the hardware system, we wrote the system software, debug the motor control system and the results show that the system achieves the expected effect. The results of the research can be applied to brushless DC motor and other motor control, it will have a wide application prospects. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2565 Full Text: PDF

Simulation Research of Vector Control System Based on the Improved MRAS Speed Sensorless

According to the basic principle of vector control for the asynchronous motor, a speed sensorless vector control system of asynchronous motor is bulit which based on the Model Reference Adaptive System (MRAS) theory. The traditional MRAS speed identification algorithm is vulnerable to the effects of stator resistance, an improved method of MRAS speed identification is put forward. A simulation model of the speed sensorless vector control system based on MRAS is bulit in Matlab/simulink, the simulation results show that the speed estimation method can accurately calculate the speed of motor.

The Design of the Vector Control System of Asynchronous Motor

Among various modes of the asynchronous motor speed control, vector control has the advantages of fast response, stability, transmission of high-performance and wide speed range. For the need of the asynchronous motor speed control, the design uses 89C196 as the controller, and introduces the designs of hardware and software in details. The Design is completed effectively, with good performance simple structure and good prospects of development.