Six-step inverter pattern
4 parts
The three-output square PWM source, carriers staggered by a third of a period, drives a resistor wye whose star point floats. With 50% duty exactly one or two phases are high at any instant, so the star rides at 4 or 8 V — one-third or two-thirds of the 12 V rail — while each phase swings the full 0–12 V. Phase minus star is therefore the classic six-step staircase every inverter textbook draws, ±4 V and ±8 V, and the differential probe reads it directly. Behavioural source: three ideal staggered voltage branches, not six switches.
- PWM31 50Hz·50% 3φ
- R1 100Ω
- R2 100Ω
- R3 100Ω
