Development Of Space Vector Modulator For 3-Phase Voltage Source Inverter (VSI)

Mohd Hanafi, Md Rasul (2013) Development Of Space Vector Modulator For 3-Phase Voltage Source Inverter (VSI). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This thesis presents the development of Space Vector Pulse Width Modulation for 3-phase Voltage Source Inverter in electrical drive applications. The rapid developments of power electronic device and microprocessor have led to improvement the modulation technique to increase the power output and efficiency of the inverters. In many industrial applications the conventional modulation technique such as Sinusoidal Pulse Width Modulation (SPWM) suffers a problem with limited output voltage capability. In this project it proves that the Space Vector Modulation (SVM) technique is the best solution to increase the inverter‟s output voltage capability and suitable for digital implementation. Moreover, it showed that the Space Vector modulation technique can provide less harmonic distortion of the output current, and increase the efficiency due to optimal switching strategy. The theory of SVM was validated by simulation using Matlab/Simulink and the implementation is achieved by using optimized IQ-Math block in Embedded IDE in Matlab 2011a. It can be shown, the sampling time period can be minimized to 50μs, and the switching frequency can be increased up to 2 kHz. The feasibility and effectiveness of SVM implementation using ezDSP F28335 to provide less switching losses, less harmonic distortion and better dc bus utilization were verified through simulation and experimental results.

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