Possible dumb question about AC-DC
Actually, it's not. That simple. Three phase rectifiers have "complications" because the waveforms overlap.
In a 3 phase winding feeding a rectifier, you are always using TWO windings, which are slightly out of phase with each other. This means they don't "add" simply. You have to plot the phase difference to find the addition.
It is difficult to find a website which gets down to the basics
http://services.eng.uts.edu.au/~venkat/pe_html/ch05s1/ch05s1p1.htm
Most of you guys cannot imagine how difficult this stuff was before the advent of solid state diodes. When I first got into amateur radio, a bridge consisted of at least three or 4 vacuum tubes. You had to have THREE separate filament transformers. All these transformers ---or at least separate windings on one power transformer--had to have enough insulation to stand the high peak voltage and not break down the transformer insulation.
For that reason "back then" it was somewhat more common to find full wave "center tap" rectifiers rather than bridge.
This is a commercial 1 KW AM transmitter, small for a broadcast transmitter, "big" for amateur radio
No it ain't mine. The tubes are 4-400 tetrodes, meaning 4 elements...cathode, control grid, screen grid, and plate, or anode. The two RF "final" PA (power amplifier) tubes on the right are modulated by the two on the left, the "modulators." This amounts to a pretty fair sized audio amplifier of about 500 watts output.
Something like this needed a serious power supply, with "mercury vapor" rectifiers, back in the day
Mercury vapor rectifiers, always "fun" to watch the blue / purple glow. You could monitor your keying by watching them.
Actually, it's not. That simple. Three phase rectifiers have "complications" because the waveforms overlap.
In a 3 phase winding feeding a rectifier, you are always using TWO windings, which are slightly out of phase with each other. This means they don't "add" simply. You have to plot the phase difference to find the addition.
It is difficult to find a website which gets down to the basics
http://services.eng.uts.edu.au/~venkat/pe_html/ch05s1/ch05s1p1.htm
Most of you guys cannot imagine how difficult this stuff was before the advent of solid state diodes. When I first got into amateur radio, a bridge consisted of at least three or 4 vacuum tubes. You had to have THREE separate filament transformers. All these transformers ---or at least separate windings on one power transformer--had to have enough insulation to stand the high peak voltage and not break down the transformer insulation.
For that reason "back then" it was somewhat more common to find full wave "center tap" rectifiers rather than bridge.
This is a commercial 1 KW AM transmitter, small for a broadcast transmitter, "big" for amateur radio
No it ain't mine. The tubes are 4-400 tetrodes, meaning 4 elements...cathode, control grid, screen grid, and plate, or anode. The two RF "final" PA (power amplifier) tubes on the right are modulated by the two on the left, the "modulators." This amounts to a pretty fair sized audio amplifier of about 500 watts output.
Something like this needed a serious power supply, with "mercury vapor" rectifiers, back in the day
Mercury vapor rectifiers, always "fun" to watch the blue / purple glow. You could monitor your keying by watching them.