Rotor flux observer for induction motor using full-order terminal sliding-mode

2021 ◽  
Author(s):  
Hongyu Su ◽  
Minghao Zhou ◽  
William Cai ◽  
Siwei Cheng ◽  
Hanying Gao
Keyword(s):  
Induction Motor ◽  
Sliding Mode ◽  
Terminal Sliding Mode ◽  
Flux Observer ◽  
Rotor Flux

Stator Flux Observer for Induction Motor Based on Prescribed Convergence Law Algorithm

2015 ◽  
Vol 719-720 ◽  
pp. 461-469
Author(s):  
Yue Dou Pan ◽  
Ze Ping Chen ◽  
Hua De Li
Keyword(s):  
Induction Motor ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Estimation Method ◽  
Torque Control ◽  
Control Effect ◽  
Flux Observer ◽  
Rotor Flux ◽  
Observer Model ◽  
Stator Flux

This paper proposes a stator flux estimation method for induction motor based on Prescribed Convergence Law algorithm. A stator flux observer is designed and applied for direct torque control (DTC) of induction motor. The observer tracks stator current and its differential with Prescribed Convergence Law algorithm of second order sliding mode in order to estimate rotor flux, and then estimate stator flux using the relationship between stator flux and rotor flux. This paper takes the differential of estimated flux error as disturbance and divides the MIMO (Multiple Input Multiple Output) observer model into two separate SISO (single input single output) systems, which simplifies the stability analysis. The observer is applied to DTC of induction motor and achieves a good control effect. Simulation experiment results validate the proposed method.

scholarly journals Robust Speed-Sensorless Vector Control of Doubly Fed Induction Motor Drive Using Sliding Mode Rotor Flux Observer

2018 ◽  
Vol 7 (3) ◽  
pp. 235
Author(s):  
Djamila Cherifi ◽  
Yahia Miloud
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Sliding Mode ◽  
Motor Speed ◽  
Speed Sensorless ◽  
Flux Observer ◽  
Sensorless Vector Control ◽  
Separate Control ◽  
Rotor Flux ◽  
Doubly Fed

This paper presents a robust observer for sensorless speed control of doubly fed induction motor (DFIM), based on the slidin mode. In the first step, a model of the doubly fed induction motor fed by two PWM inverters with separate DC bus link is developed. In the second step and in order to provide a robust separate control between flux and motor speed a vector control by field oriented strategy applying a sliding mode regulator was implemented. Finally, speed estimation of a doubly fed induction motor based on sliding mode observer is presented. The simulation tests schow the effectiveness of the proposed method especially in the load disturbances, the change of the refrence speed and low speed. Also the influence of parameter variations will be studied by simulation

A Rotor Flux Observer Based on Nonlinear Quadrature Double Compensation

2011 ◽  
Vol 128-129 ◽  
pp. 25-29
Author(s):  
Bo Fan ◽  
Xing Li ◽  
Jie Xin Pu ◽  
Jian Wei Ma ◽  
Ju Wei Zhang
Keyword(s):  
Induction Motor ◽  
Electromotive Force ◽  
Signal Frequency ◽  
Quick Response ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Flux Observer ◽  
Low Pass ◽  
Rotor Flux ◽  
Order Change

In order to solve the problem of integration saturation drift and hardship in compensation quantity calculation exist in rotor flux observation of induction motor, a rotor flux observer based on nonlinear quadrature double compensation method is presented in this paper. The quantity of compensation is determined dynamically according to the quadrature level between flux and back electromotive force. Through the order change of compensation and low-pass filter, quick response of flux when signal frequency leaps is realized. The simulation result shows that the method can improve the flux waveform, realize the accurate and swift track of flux.

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