Triphase rectifier full bridge

200

03:53:05

Star configuration with resistive load

published 5 years ago

MatthewKessler

5 years ago

Ring oscillator.

MatthewKessler

5 years ago

:) great circuit!

wyoelk

5 years ago

There really is a difference between -120 and 240. Unfortunately it would be difficult to get -240° power supply. Normally it would be at 0° 120° 240°

PrathikP

5 years ago

0, 120 and 240 is the same as -120, 0, 120. I just depends on which source you consider as reference, the other two of the phases are measured relative to it.

wyoelk

5 years ago

From a power plant generation it would not be setup to lag on a three phase generator -120°. Now if checking three different generators a phasing tool, used by HV lineman hasn't the capability to read negative lag. So this configuration must be a tabletop power convertor to create negative phasing.

PrathikP

5 years ago

It doesn't really matter. What matters is that the phases are 120 apart, which they are. How you choose your reference point is really upto you. -120,0,120 is valid if you take the middle phase as reference and 0,120,240 is valid if you take the 'first' phase as reference. It's like swapping your multimeter leads and measuring a voltage. What you need to check for is the magnitude. That's important.

PrathikP

5 years ago

Infact I can setup my sources as 45, 165, 285 and it still wouldn't matter. The three phases are still 120 apart

PrathikP

5 years ago

What you are talking about is phase SEQUENCE. There are only 2 valid phase sequences 1-2-3 and 3-2-1. But in case of phase measurement, I can take anything as reference. So in the first case, if 2 is my reference, 1 is 120 behind and 3 is 120 ahead. If 1 is my reference, 2 is 120 ahead and 3 is 240 ahead. If I take 3 as my reference, 2 is 120 behind and 3 is 240 behind. It DOES NOT affect the phase sequence.

wyoelk

5 years ago

All of that matters yes, on paper. In building physical generators it is physically impossible to retard brushes or windings to a -120°. I know, I worked for Westinghouse in Salt Lake City rewiring them for years. Paper engineers would request negative degree stuff but physically it ain't gonna happen. Construction begins at zero and only winds forward in a generator or transformer. On paper the reference point is 100% valid and correct and even in calculus it works. Just not physically. Perception and experience is where we differ it seems.

PrathikP

5 years ago

Oh ok, the physical construction is done that way.

wenesga

5 years ago

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