Efficiency Loss Model for Asynchronous Motor Vector Control

The study aims at the analysis of vector control asynchronous electric drive systems. For comparison and evaluation, mathematical models of systems are implemented in the environment of simulation modeling Matlab Simulink. The evaluation criteria selected were: complexity of implementation, energy efficiency of the inverter, accuracy of speed maintenance, torque ripple, reaction speed of the system to disturbances from the side of the drive mechanism, impact on the supply network. Vector control systems by ensuring the maintenance of accuracy of the moment in the entire range of speed control are more widespread. The study of vector systems, the formation of the stator voltage vector in which is carried out using pulse-width modulation. The signal organization during the study was carried out by several methods. At the initial stage, the signal was formed due to relay-vector control in a closed loop for monitoring the instantaneous values of current errors without forced modulation; at the next stage of the study, the signal was generated using sinusoidal pulse-width modulation based on a comparison of control signals with some reference vector, the final stage became a spatial-vector modulation method.

Download Full-text

Research on Speed Sensorless Vector Control System of Asynchronous Motor Based on MRAS

MATEC Web of Conferences ◽

10.1051/matecconf/201816002006 ◽

2018 ◽

Vol 160 ◽

pp. 02006

Author(s):

Zili Liao ◽

Qijin Zhao ◽

Xinxi Zhang ◽

Luming Chen

Keyword(s):

Control System ◽

Vector Control ◽

Asynchronous Motor ◽

Speed Sensorless ◽

Speed Sensor ◽

Sensorless Vector Control ◽

Static Performance ◽

Vector Control System ◽

Hysteresis Control ◽

Model Reference Adaptive

This paper analysed the basic principle of speed sensorless vector control system. Based on speed and current closed loop vector control, combined with a simple and feasible current hysteresis control strategy, the whole speed sensorless system of asynchronous motor is simulated in MATLAB/Simulink. The method uses the Model Reference Adaptive System (MRAS). The observation and analysis of waveform shows that the system has good static performance and robustness. The control effects are also as similar as the vector control system which contains speed sensor.

Download Full-text

Simulation Research of Asynchronous Motor Direct Torque Control System Based on MATLAB

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.577.364 ◽

2014 ◽

Vol 577 ◽

pp. 364-367

Author(s):

Guo Hong Li ◽

Yi Li

Keyword(s):

Vector Control ◽

Asynchronous Motor ◽

Direct Torque Control ◽

Torque Control ◽

Simulation Research ◽

Startup Time ◽

Vector Theory ◽

The Difference ◽

In Virtue Of ◽

Excellent Stability

Compared with vector control, direct torque control (DTC) spurned coupling idea and canceled circumgyration coordinates transform. By detecting motor’s stator voltage and current, along with calculating motor’s flux and torque in virtue of the instantaneous space vector theory, DTC controlled flux and torque directly according to the difference between the detecting value and design value. DTC also reduced calculation amount and overcomed the flaw that the system was disturbed by motor’s parameters easily, which were the problems in the vector control. On the basis approach mentioned above, this paper realized the system simulation using DTC. Simulation shows that asynchronous motor control has favorable ability of speed adjusting, short startup time, excellent stability.

Download Full-text

A Frictional Efficiency Loss Model for Helical Gears

Volume 5b: Power Transmission and Gearing Conference ◽

10.1115/detc2005-85243 ◽

2005 ◽

Cited By ~ 4

Author(s):

Hai Xu ◽

Ahmet Kahraman

Keyword(s):

Efficiency Loss ◽

Loss Model ◽

Helical Gears

Download Full-text

The Research of the Asynchronous Motor Vector Control Arithmetic

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.157-158.878 ◽

2012 ◽

Vol 157-158 ◽

pp. 878-881 ◽

Cited By ~ 1

Author(s):

Fang Gao ◽

Li Wei

Keyword(s):

Mathematical Model ◽

Control System ◽

Vector Control ◽

Closed Loop ◽

Induction Motors ◽

Asynchronous Motor ◽

Flux Vector ◽

Simulation Results ◽

Vector Control System ◽

Control Principle

This paper is based on analysis of mathematical model of the induction motor and the basis of the asynchronous motor vector control principle puts forward a torque of inner closed-loop speed, flux vector control system of induction motors. Using Matlab/Simulink construct simulation model and the simulation results are analyzed.

Download Full-text