Three-modulation SVPWM Algorithm

With the increasing depletion of fossil fuels, new energy alternatives to its obvious effect.PV is already an important strategic emerging industries. The role of the inverter technology is the relatively poor raw DC power, such as solar energy, wind energy, electric energy is converted into higher quality, better able to meet the requirements of the user load AC power.Three-phase inverter is widely used SVPWM modulation technology.SVPWM technology universal widespread, rapid development, has been engineering and academic attention, and is widely studied. Because the traditional SVPWM modulation algorithm involves the coordinate transformation and vector decomposition, have more trigonometric functions, matrix operations and irrational operation, which reduces the computational complexity of the requirements of real-time control system, so some of the new sevensegment of SVPWM algorithms have been proposed.This article intends to abandon the traditional seven-segment modulation strategy, the use of original thinking to generate basic vector space, proposed a three-stage SVPWM algorithm. The algorithm obtained after Ts, Tk, Tk+1 and T0 modulated wave generated by the combinational logic circuit bridge power switches driven waves. The advantage is to simplify the tedious calculation of the traditional seven-segment SVPWM modulation, and only by the look-up table to complete simple multiplication modulation, simplifying the complex process of SVPWM, improved real-time system. Then, based on Matlab / Simulink simulation experiments, during simulation of the modulation characteristics SVPWM modulation and seven three-modulator do a comparative analysis. Finally, based on the three-phase inverter TMS320F2808 complete experimental test platform to obtain experimental waveforms on an oscilloscope. Verify that the three-stage modulation SVPWM and its calculation method is feasible.