JACIII Vol.19 No.1 pp. 127-133
doi: 10.20965/jaciii.2015.p0127


Speed-Sensorless Vector Control Based on ANN MRAS for Induction Motor Drives

Kai Xu and Shanchao Liu

College of Information Science and Engineering, University of Chongqing Jiaotong, No. 66, Xuefu Rd., Nan’an District, Chonqing 400074, China

October 24, 2013
October 27, 2014
Online released:
January 20, 2015
January 20, 2015
vector control, speed-sensorless, model reference adaptive system (MRAS), artificial neural networks(ANN), modified particle swarm optimization (PSO)

In the speed-sensorless induction motor drives system, Model Reference Adaptive System (MRAS) is the most common strategy. However, speed estimation using reactive power based MRAS has the problem of instability in the regenerating mode of operation. Such estimation technique is simple and has several notable advantages, but is not suitable for induction motor drives. To overcome these problems, a suitable Artificial Neural Networks (ANN) is presented to replace the adjustable model to make the system stable when working at low speed and zero crossing. Simultaneously, in order to enhance the ANN convergence speed and avoid the trap of local minimum value of algorithm, we used themodified Particle Swarm Optimization (PSO) to optimize the weights and threshold values of neural networks. Then the ANN-based MRAS was used to identify the speed of motor in the indirect vector control system. The results of the simulation show that, by this method, the speed of motor can be identified accurately in different situations, and the result is reliable.

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Last updated on Mar. 28, 2017