Abstract
This paper proposes a dual-frequency discontinuous space vector pulse width modulation (DFDSVPWM) for the five-phase voltage source inverter with harmonic injection. In this modulation, for dual-frequency voltage output and reduction of switching losses, two different zero-vector-inserted modes are flexibly employed by using two types of zero vectors alternatively. Based on the comparison with continuous SVPWM, the idea and principle of the proposed DFDSVPWM are analyzed and an example of PWM signals of one bridge is also presented. For switching losses analysis, the impact factors and the calculation method are investigated and the corresponding implementation is given as well. The simulation and experimental results from a prototype verily the correctness and effectiveness of the proposed modulation and it has the advantages of outputting dual-frequency voltage and reducing switching losses.
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