5 Vikas Patel, Dr.V.K Giri International Journal of Computer & Mathematical Sciences IJCMS ISSN 2347 – 8527 Volume 3, Issue 5 July 2014 Performance Analysis of SVPWM Inverter Fed Permanent Magnet Synchronous Motor Vikas Patel Dept. of Electrical Engineering Madan Mohan Malviya University of Technology Gorakhpur, India Dr.V.K Giri Professor & Head Dept. of Electrical Engineering Madan Mohan Malviya University of Technology Gorakhpur, India Abstract — In this paper a space vector pulse width modulation (SVPWM) technique based on mathematical mapping is proposed to reduce total harmonic distortion (THD) of inverter fed permanent magnet synchronous motor (PMSM). Voltage space vectors are studied and simulation of an inverter fed permanent magnet synchronous motor is realized. Afterwards a low pass filter is attached to simulation system to suppress the harmonics generated in the system. The basic purpose of voltage vector selection is to facilitate look up table method. In this study, an inverter switching table is mapped for the permanent magnet synchronous motor (PMSM) control which is performed by selecting the appropriate stator space vectors from the table. Space vector pulse width modulation (SVPWM) algorithm uses a simple mapping to generate gate signals for inverter. The implemented space vector pulse width modulation (SVPWM) control is used to achieve better dynamic performance response with lower total harmonic distortion. Index Terms—MATLAB/ Simulink, PMSM, SVPWM Inverter, Total Harmonic Distortion (THD). I. INTRODUCTION During last three decades AC machine drives are becoming more and more popular, especially Permanent Magnet Synchronous Machine (PMSM) has been used in many automation fields such as robot, metal cutting machines, precision machining, etc. The PMSM drives are ready to meet sophisticated requirements such as fast dynamic response, high power factor, and wide operating speed range like high performance applications, as a result, a gradual gain in the use of PMSM drives will surely be in the future market in low and mid power applications. Recently, PMSM is applied to traction drive for electric vehicles and railway vehicles [2-3]. Fig.1 shows the block diagram of voltage source inverter (VSI) fed PMSM Drive. The space vector modulation technique is somewhat similar to the sine+3 rd harmonic PWM technique but the method of implementation is different. The concept of voltage space-vector, in analogy with the concept of flux space-vector as used in three- phase ac machine. The stator windings of a 3- phase AC machine (cylindrical rotor), when fed with a three-phase balanced current produce a resultant flux space-vector that