Implementation of an Inverter using a New SVPWM Technique
Keywords:
Space Vector PWM, Voltage Source Inverter, DSPIC30F6010, Three Element Sorting AlgorithmAbstract
Space Vector Modulation (SVPWM) is one of the most preferred Pulse Width Modulation(PWM) strategies. This form of scheme in Voltage Source Inverter (VSI) drives provides better use of bus voltage and less loss in commutation. Controlling three-phase inverter voltage by space-vector modulation involves switching between the two active and zero voltage vectors so that the time interval times the voltages in the chosen sectors is equal to the command voltage times the time period within each switching cycle. The reference voltage is presumed to be constant during the switching cycle as the time period would be very small. The SVPWM scheme can be easily implemented by simple digital measurement of the switching time. In this paper, three element sorting algorithm is used to calculate the switching times. The hardware is realized using DSPIC30F6010 microcontroller and tested using a resistive load.
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