I'm wondering as to how a system like this:


acts, when their thyristors are controlled in various ways.

The converters are simple enough, but I'm wondering how the graph made around the voltage going over the resistor \$R\$ would look like when the thyristors are set top \$0^\circ\$ and \$90^\circ\$ respectively.

  • 2
    \$\begingroup\$ On-line simulator: plexim.com/academy/power-electronics/thyristor-rect-ind-load \$\endgroup\$ Apr 19, 2017 at 10:41
  • \$\begingroup\$ Thanks, that was a massive help. How does the frequency of the current project to the frequency of the sine-waves; is it directly relatable? (50 hz would mean that one complete sine-wave or two converted "mounds" are 20 milliseconds?) \$\endgroup\$
    – Grak
    Apr 19, 2017 at 10:52

1 Answer 1


There are several alternative topologies for controlled rectifier bridges. The one in your diagram is called a half-controlled bridge. The associated waveform is shown below.

enter image description here

Here is the description of operation:

enter image description here

The above material is from:F. F. Mazda, Thyristor Control, John Wiley & Sons,1973

  • \$\begingroup\$ it would definitely be helpful to include actual text rather than an image of text. \$\endgroup\$
    – NH.
    Dec 11, 2017 at 16:01

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