scholarly journals Real time implementation of adaptive sliding mode observer based speed sensor less vector control of induction motor

2010 ◽  
Vol 7 (2) ◽  
pp. 167-184 ◽  
Author(s):  
Karim Negadi ◽  
Abdellah Mansouri ◽  
Belkheir Khtemi
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Sliding Mode ◽  
Motor Drives ◽  
Sliding Mode Observer ◽  
Electrical Drives ◽  
Speed Sensor ◽  
Rotor Flux ◽  
The Cost ◽  
Hostile Environments

Sensor less induction motor drives are widely used in industry for their reliability and flexibility. However, rotor flux and speed sensors are required for vector control of induction motor. These sensors are sources of trouble, mainly in hostile environments, and their application reduces the drive robustness. The cost of the sensors is not also negligible. All the reasons lead to development of different sensor less methods for rotor flux and mechanical speed estimation in electrical drives. The paper deals with the speed estimators for applications in sensor less induction motor drive with vector control, which are based on application of model adaptive, based sliding mode observer methods. This paper presents the development and DSP implementation of the speed estimators for applications in sensor less drives with induction motor.

Online Adaptation of Rotor Resistance based on Sliding Mode Observer with Backstepping Control of A Five-Phase Induction Motor Drives

2016 ◽  
Vol 7 (3) ◽  
pp. 648 ◽  
Author(s):  
H. Echeikh ◽  
R Trabelsi ◽  
Atif Iqbal ◽  
M.F Mimouni ◽  
R Alammari
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Sliding Mode ◽  
Motor Drives ◽  
Sliding Mode Observer ◽  
Unknown Parameters ◽  
Stator Current ◽  
Rotor Resistance ◽  
Rotor Flux ◽  
Stator Resistance

Multiphase electric drives have been developed due to numerous advantages offered by those machines when it compared with the conventional three-phase machines. Multiphase motor drives are considered for applications, where the reduction of power per phase for both motor and inverter and high reliability are required. High performance control techniques are developed for multi-phase drives. The performances of the high performance controller and flux observers may be degraded during the operation. Since the parameters of Induction Motor (IM) varies continuously due to temperature variation and heating. Thus it is significantly important that the value of rotor resistance is continuously observed online and adapted by the control algorithm in order to avoid detuning effects. The efficiency and performance of an induction motor drive system can be improved by online observation of the critical parameters, such as the rotor resistance and stator resistance. Among the parameters of IM, rotor resistance is a decisive one for flux estimation, and also the stator resistance becomes critical in the low-speed operation condition. This paper presents a new online estimation method for the rotor resistance of the IM for sliding mode observer. This method generally based on theories of variable structure and is useful in order to adjust online unknown parameters (load torque and rotor resistance). The presented non-linear compensator afford a voltage inputs on the articulation of stator current and rotor speed measurements, and engender an estimates for the unknown parameters simultaneously, the non-measurable state variables (rotor flux and derivatives of the stator current and voltage) that converge to the corresponding true values. Under the persistent excitation condition, the proposed method estimates the actual value of rotor resistance, which guarantees the exact estimation of the rotor flux. Non-linear Backstepping control and adaptive sliding mode observer of a five-phase induction motor drive is presented. The accuracy and validity of the method is verified by MATLAB simulation model.

Switching FOC Method for Vector Control of Single-Phase Induction Motor Drives

2016 ◽  
Vol 6 (2) ◽  
pp. 474
Author(s):  
Mohammad Jannati ◽  
Nik Rumzi Nik Idris ◽  
Mohd Junaidi Abdul Aziz ◽  
Tole Sutikno ◽  
M. Ghanbari
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
High Performance ◽  
Single Phase ◽  
Control Method ◽  
Controller Design ◽  
Motor Drives ◽  
Induction Motor Drives ◽  
Rotating Reference Frame ◽  
Rotor Flux

This paper proposes a novel vector control method based on Rotor flux Field-Oriented Control (RFOC) for single-phase Induction Motor (IM) drives. It is shown that in a rotating reference frame, the single-phase IM equations can be separated into forward and backward equations with balanced structures. In order to accommodate for these forward and backward equations, a drive system consisting of two RFOCs that are switched interchangeably, is proposed. Alternatively, these two RFOC algorithms can be simplified as a single FOC algorithm. The analysis, controller design and simulation of the proposed technique showed that it is feasible for single-phase IM drive for high performance applications.

Sign in / Sign up

Export Citation Format

Share Document