How to understand below Firing Angle Chart,
I guess the y axis should be voltage of the source, but what is the x axis, why a1/a2 points right, the location of 0⁰/90⁰/180⁰ seems quite strange.
Hints are:
- ⍺1 + ⍺2 = 180⁰
- In rectifier mode(Rect.), 0⁰< ⍺1/⍺2 < 90⁰,
- In inverter mode(inv.), 90⁰< ⍺1/⍺2 < 180⁰,
