ABSTRACT
Then, deducting (4.3) from (4.2), we obtain the equation for switch-on angles imbalance:
= arcsin XH Zy1
-arcsin XH Zy1
+ arcsin XH
Zy2 + arcsin Iy2Zy2
Analysis of this equation shows that completely symmetrical thyristor work is possible only for terms:
If we neglect voltage drop on an open thyristor, we get:
(4.12)
If Ry << R + RH, it can be written, that Zyl = Zy2 = Zy. With provision for it, we can transform (4.11) into:
Um -
Um = ImZm = 2 IHZH , where IH - load current (rms), which will be for interval angles = , corresponding to an open state of the thyristor.
