Sensorless speed control of PMSM drives using dSPACE DS1103 board

This paper presents the hardware implementation of sensorless speed control of Permanent Magnet Synchronous Motor (PMSM) drives using dSPACE DS1103 board. dSPACE Real-Time Interface (RTI) is the link between software and hardware development. It automatically implements the MATLAB/Simulink model on the dSPACE Expansion Box. The simplified mathematical model of the Permanent Magnet Synchronous Motor (PMSM) is also developed in this paper.Speed and torque controls of permanent magnet synchronous motors are usually attained by the application of position and speed sensors. Yet,speed and position sensors require the additional mounting space,reduce the reliability in harsh environments and increase the cost of the motor. Therefore, many studies have been performed for the elimination of speed and position sensors.Therefore, a V-I model based on adaptive control is proposed. A speed and position estimator is formed using parameter uncertainty cancellation to estimate the speed without using any sensor. Firstly, the speed estimation errors of a voltage and current model-based adaptive speed due to the parameter variation are analyzed. Consequently,an adaptation mechanism model is developed to cancel the effects of parameter variations on the estimated speed performance.Finally, the speed control with quantitative control performance considering the effect due to the feedback of estimated speed is presented.The experimental results prove that the speed and position estimator is capable to control the PMSM drives for variation of speed command and can be control during zero speed operation.