Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
(OP)
Hello all,
Lately been struggling to get the answers to these questions,
Q.1 Does phase sequence/ phase shift in input AC supply affect rectified DC output in fully controlled rectifier?
Q.2 How does the triggering angle of rectifier change automatically in a practical fully controlled rectifier?
Q.3 Does its control circuit have some zero crossing detectors for input AC supply to determine its phase angle or to generate its triggering gate pulse?
Q.4 In the rectified DC output current to our battery I was able to measure the charging DC current as 2A and AC current as 18A. So I am guessing AC current which is due to the ripple needs to be minimum right? (and if not does it mean the capacitors need to be changed)?
Best!
Chris
Lately been struggling to get the answers to these questions,
Q.1 Does phase sequence/ phase shift in input AC supply affect rectified DC output in fully controlled rectifier?
Q.2 How does the triggering angle of rectifier change automatically in a practical fully controlled rectifier?
Q.3 Does its control circuit have some zero crossing detectors for input AC supply to determine its phase angle or to generate its triggering gate pulse?
Q.4 In the rectified DC output current to our battery I was able to measure the charging DC current as 2A and AC current as 18A. So I am guessing AC current which is due to the ripple needs to be minimum right? (and if not does it mean the capacitors need to be changed)?
Best!
Chris
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
2. It doesn't, the controller must change it for whatever reason it's programmed to change it.
3. Yes.
4. Not enough information to know.
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
(b) Aren't the i/p ac phases always 120 degree apart? So what do you mean by your first reply.
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
And since the zero crossings of a non-uniform phase shift don't happen equally spaced out (in time), you introduce distortion into the dc output.
Converting energy to motion for more than half a century
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
b. They should be, but aren't always.
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
RE: Does phase sequence/ phase shift in input AC supply affect rectified DC output ?
Q.1 Does phase sequence/ phase shift in input AC supply affect rectified DC output in fully-controlled rectifier?
Line and Neutral have some effects on some Triacs that prefer certain quadrants, so they may be labelled as such, otherwise, no.
Q.2 How does the triggering angle of the rectifier change automatically in a practical fully-controlled rectifier?
Yes, the control is done by changing the phase angle of Triac conduction.
Q.3 Does its control circuit have some zero crossing detectors for input AC supply to determine its phase angle or to generate its triggering gate pulse?
YES
Q.4 In the rectified DC output current to our battery I was able to measure the charging DC current as 2A and AC current as 18A. So I am guessing AC current which is due to the ripple needs to be minimum right? (and if not does it mean the capacitors need to be changed)?
The excessive AC current is an error, unless you were doing pulsed high current with low duty cycle.
I am making assumptions you know what you are doing with Triacs on chargers or any DC power supply, which normally do not go together well unless they are "dimmable". HALT! ACHTUNG!