Generalized three-level SVPWM modulation algorithm

Generalized three-level SVPWM modulation algorithm

  • CN 106,712,564 A
  • Filed: 01/04/2017
  • Published: 05/24/2017
  • Est. Priority Date: 01/04/2017
  • Status: Active Grant
First Claim
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1. the level SVPWM modulation algorithm of a kind of broad sense three, it is characterised in that comprise the following steps:

  • Step 1, three phasor diagrams of Three-Level Inverter System are divided into 6 big sectors by 60 °

    of intervals, each big sector is oneIndividual equilateral triangle, 2 small triangles are divided into by equilateral triangle by 30 °

    of directions, and each small triangle pair answers a small sector;

    Step 2, for arbitrarily small sector, with a big vector V of corresponding small sector3, a middle vector V2And a small vectorV1Remove synthesized reference vector Vref, calculate small vector V1, middle vector V2, big vector V3Action time ta

    tb

    tc, then have:

    In formula, K is to be adjusted to depth,E is whole BUS voltages, TsIt is ginsengExamine vector VrefAction time, Ts=ta+tb+tc, θ

    is the angle of reference vector;

    Step 3, the big vector V to each big sector3, middle vector V2And small vector V1Sequence of operation be ranked up, according to majorAction time that the sequence of operation and step 2 of each vector in sector are obtained decomposes and obtains accounting for for each pipe in Three-Level Inverter SystemSky ratio.

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