Performance of the Speed Sensorless
Induction
Motor Drive for Traction Application
with MRAS
type Speed and Flux Estimator
ABSTRACT:
In the paper the Model Reference Adaptive System (MRAS)
type estimator is applied in the sensorless Direct Torque Control with Space
Vector Modulation (SVM-DTC) of Induction Motor (IM) drive. Sensorless control
algorithm is tested on the traction 50kW induction motor drive. Whole control
structure was implemented in the laboratory set-up with DS1103 card with Power
PC 750GX DSP processor using C language. Dynamical performance of the drive and
the estimator properties in field weakening and low speed regions for traction drive
system are presented.
SOFTWARE: MATLAB/SIMULINK
CONCLUSION:
In
this paper the performance of the sensorless SVM-DTC control structure of the
induction motor drive for traction application were presented. Stator flux and
rotor speed are reconstructed using the MRASCC estimator. It was proved that
this estimation technique is robust to the motor parameter changes (including
no-load and nominal load operation as well as field-weakening operation, which are
connected with changes of motor winding parameters in a wide range) and can be
implemented in the safety industrial application, like e.g. traction. Sensorless
control algorithm is stable in the whole speed reference changes – including
zero speed and field weakening operation. Drive works properly with and without
load torque. This rotor speed and flux estimator can be implemented in
different control algorithms with or without speed control loop.
REFERENCES:
[1]
P. Vas, Sensorless vector and direct torque control, Oxford University Press,
New York, 1998.
[2]
J. Holtz, “Sensorless Control of Induction Machines - With or Without Signal Injection?”,
IEEE Trans. Ind. Electronics, vol. 53, no. 1, pp. 7-30, 2006.
[3]
J.W. Finch, and D. Giaouris, “Controlled AC electrical drives," IEEE
Trans. Industrial Electronics, vol. 55, no. 2, pp. 481-491, 2008. 480
[4]
S. N. Vukosavic, A. M. Stankovic, “Sensorless Induction Motor
Drive with a Single DC-Link Current Sensor and Instantaneous Active and
Reactive Power Feedback”, IEEE Trans. Ind. Electr., vol. 48, no. 1, pp.
195-204, 2001.
[5]
C. Conilh, M. Pietrzak-David, “Sensorless Traction System with Low Voltage High
Current Induction Machine for Indoor Vehicle”, Proc. Of the
IEEE/PEDS’2005 Confer., pp.50-55, 2005.
