I have a project going on to replace the static excitation systems on four small pump/generators. The current scheme for tripping the DC field breaker has a few different modes:
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For a split-phase differential trip, an opened excitation AC breaker, or opened PPT HV disconnect, the field...
Why do you say it is wrong to consider the combination field winding / discharge resistor as a series RL circuit? I envision it as a voltage source (the result of -N*d(phi)/dt from the stator currents) in series with R and L of the field winding as well as the discharge resistor. When the...
Checking back through some old textbooks, I came to a similar conclusion. I haven't been able to find anything that leads me to believe there is a shift between current and flux due to said current. The timing explanation you provided above makes sense.
Thinking about it a bit more, when...
I'm not following you. I realize that the time derivative of a sinusoidal flux is cosine and thus 90 degrees out of phase, but that describes the induced voltage. The exciter manual states that it tracks zero crossings of induced current in the discharge resistor. Where does the 90 degree...
I have been going through old product data on a 5,500hp synchronous motor with a brushless exciter as part of an upcoming modernization project. The manual states that the optimum angle for field application occurs when the current induced in the field discharge resistor moves through a...
