Sliding mode observer and controller for Performance improvement of Brushless DC Motor

Abstract— The present paper proposes a control scheme comprising of a new sliding mode controller (SMC) with sliding mode observer (SMO) for improved performance of a Brushless DC (BLDC) motor. The SMO is used to estimate rotor speed and rotor position using terminal voltages and currents of the BLDC motor. The error between actual and estimated currents taken as the sliding surface from which the back emf is estimated which is further used to estimate rotor position and speed. The SMC consists of both speed control and current control loops where the reference to the currents is derived from speed error using PI controller. The speed error and current error together comprises the sliding surface. The proposed SMC is an alternative to second order SMC and it eliminates the derivative of the sliding variable for speed control thus eliminating complexity while preserving the benefits. The simulation results of the proposed scheme are compared with those of the conventional scheme to prove its effectiveness. Keyword-BLDC Motor, Sliding mode controller, Sliding mode observer

[1]  Krishna Busawon,et al.  Design and practical implementation of a back-emf sliding-mode observer for a brushless dc motor , 2008 .

[2]  Zhang Qingchao,et al.  A cascade first and second order sliding mode control approach for speed control of brushless DC motor , 2015, 2015 34th Chinese Control Conference (CCC).

[3]  Paul P. Acarnley,et al.  Review of position-sensorless operation of brushless permanent-magnet machines , 2006, IEEE Transactions on Industrial Electronics.

[5]  Rajesh Gupta,et al.  Sliding-mode control in voltage source inverter-based higher-order circuits , 2015 .

[6]  B. Nayak,et al.  Feedback Control and Dynamic Behaviour of Z-Source Converter Fed Separately Excited DC Motor and Centrifugal Pump Set , 2014 .

[7]  Hyun Lee,et al.  Design of Iterative Sliding Mode Observer for Sensorless PMSM Control , 2013, IEEE Transactions on Control Systems Technology.

[8]  Liu Jinglin,et al.  A novel sliding mode control for BLDC motor network control system , 2010, 2010 3rd International Conference on Advanced Computer Theory and Engineering(ICACTE).

[9]  Yongling Fu,et al.  Sliding mode speed control for brushless DC motor based on sliding mode torque observer , 2015, ICIA.

[10]  Changhua Hu,et al.  Adaptive robust control of brushless DC (BLDC) motor based on sliding mode control (SMC) with unidirectional auxiliary surfaces , 2015, 2015 Chinese Automation Congress (CAC).

[11]  Rajesh Gupta,et al.  Reduced state feedback sliding-mode current control for voltage source inverter-based higher-order circuit , 2015 .

[12]  Hoon Heo,et al.  Cascade Sliding Mode — New Robust PID contro for BLDC motor of In-wheel system , 2011, 2011 10th International Conference on Environment and Electrical Engineering.

[13]  Huang Wenxin,et al.  An improved sliding mode observer for position sensorless vector control drive of PMSM , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[14]  Eduardo Quintero-Manriquez,et al.  Second-order sliding mode speed controller with anti-windup for BLDC motors , 2014, 2014 World Automation Congress (WAC).

[15]  S. Preitl,et al.  2-DOF PI(D) Takagi-Sugeno and sliding mode controllers for BLDC drives , 2012, 2012 15th International Power Electronics and Motion Control Conference (EPE/PEMC).

[16]  Jaime Gómez Gil,et al.  Position and Speed Control of Brushless DC Motors Using Sensorless Techniques and Application Trends , 2010, Sensors.

[17]  C. Gerada,et al.  Sensorless control of PM motor drives — A technology status review , 2013, 2013 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD).

[18]  G. Saravana Ilango,et al.  Modified sliding mode observer for position and speed estimations in Brushless DC motor , 2011, 2011 Annual IEEE India Conference.

[19]  Alfonso Damiano,et al.  Second-order sliding-mode control of DC drives , 2004, IEEE Transactions on Industrial Electronics.

[20]  Rajesh Gupta,et al.  Second order sliding mode control for a single phase voltage source inverter , 2014, TENCON 2014 - 2014 IEEE Region 10 Conference.

[21]  H.A. Toliyat,et al.  BLDC motor full-speed operation using hybrid sliding mode observer , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[22]  Yaonan Wang,et al.  Position-Sensorless Hybrid Sliding-Mode Control of Electric Vehicles With Brushless DC Motor , 2011, IEEE Transactions on Vehicular Technology.