transformers -- winding resistance and leakage reactance
Does anyone know what is meant by:
'determine the combined winding resistance and leakage reactance referred to the primary side'?
My question is:
With a controller gain that meets the condition on the ramp set point, what is the largest achievable phase margin?
I have no idea what the solution is saying! Does anyone know what this means exactly??
A balanced 3 phase load is rated at S=10KVA and 500V. The device is operating at 90% nominal voltage and 100 % line current.
The question is:
if the load is delta connected, find the phase current in per unit and SI units.
I calculated correctly that the per unit line current value is...
I am given the problem:
100Sin(ωt+30) +20cos(ωt)
and the solution is 78.7<38.9degrees
How do I convert to phasor form?
I know for this calculation I need the following relationship:
√2Esin(ωt-∅)=Ee^(-j∅)
At first I tried making both sines and then splitting up 100Sin(ωt+30) and...
From control systems:
I am asked to find the value of K that gives the closed loop damping ratio of 1/sqrt2.
The value for the complimentary sensitivity is
T(S)=(2KS +4K)/(s^3 +162S^2 +(320+2K)S +4K)
so how do I find the value for K?
I tried putting it in the general equation, but it...
I have a question asking for the inverse laplace transform of (e^(-s))/(s^2+pi^2).
I split it up to (e^(-s))/s x s/(s^2+pi^2) and got u(t-1)cos(pi(t-1)),but the correct answer is (sin(pi(t-1)/pi)u(t-1). So here it was split up to (e^(-s))/pi x pi/(s^2+pi^2) and I don't understand where the...