Space vector modulation: Difference between revisions

Revision as of 07:12, 20 October 2020

Revision as of 10:56, 7 March 2021

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The switches must be controlled so that at no time are both switches in the same leg turned on or else the DC supply would be shorted. This requirement may be met by the complementary operation of the switches within a leg. i.e. if A⁺ is on then A⁻ is off and vice versa. This leads to eight possible switching vectors for the inverter, V₀ through V₇ with six active switching vectors and two zero vectors.

{| class="wikitable" border="1" style="margin: 1em auto;"

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! Vector

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| zero vector

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Note that looking down the columns for the active switching vectors V_1-6, the output voltages vary as a pulsed sinusoid, with each leg offset by 120 degrees of [[Phasor (electronics)|phase angle]].