Recent content by danilorj

In fact, I'm trying to perform this using simulink, but it does not have any block with phases different from three. So I don't know how to watch the qd0 -waveforms of a synchronous machine with 5-phase .

I have no reference on doing fortescue transformation for system with phases different from 3.

I wonder if someone can help me how to find the symmetrical components of a 5-phase system. What would be the positive and negative sequences? I'm saying this because in a 3-phase system I can find the positive, negative and zero sequence in function of line currents.

The problem is not clear at all on specifying what really this picture means. But I guess the region that is in bege is the magnetic core whose permeability is infinity. And 1 and 2 are cross section of rectangular conductors embedded in the core. Then, for somehow, it makes a currrent density...

Homework Statement Derive an expression for the mutual inductance ,L12, for the case of the figure, assuming a current distribution: J_{2}(x)= F_{2}(x), h1<x<h2 or I_{2}(x)= ∫^{h_2}_{h_1} F_{2}(x)w_{2}dxHomework Equations L_{12}(x)=∅_{12}(x)/ i_{2}(x) The Attempt at a Solution In fact I don't...

oh man thanks for the warning.. it is point charge. But still don't understand what to do with this force. Is it necessary to calculate? The problem states that is proportional to 1/r^a, I don't know about this 'a' whether it can be less than one or even negative.

Homework Statement Suppose a strength that acts between two charges depends on the distance, 1/r^a, where 1) a>2 2)a<2 What will happen with a punctual charge, if it is put within a uniformly charged sphere. At the initial moment the punctual charge is in rest. Homework Equations F...

And I think the best way of doing this is using the Laplace transformation, cause solving the differential equation would take a very hard work, and I don't think it's going to work as well.

Let me explain it better The Laplace transformation of the given current is I(s)=12500/[(s+700)^2+2400^2] And if I apply the Kirchhoff Law Tension around the RLC series circuit I get I(s)=1/[s*(LC*s^2+RC*s+1)]. But I don't know what to do with this. They seem to be different, one has degree 3...

Guys, Let's suppose we have RLC series circuit feeded by tension source initially with no energy stored. When we apply an unitary step of tension at t=0 at the terminals of the circuit, we observe a current of i(t)=(125/24) * exp(-700t)* Sin(2400t) mA that goes around the circuit for...

Bob S, I want to know I way of identify a winding that has multiple taps. If this way is visual or if I can do an essay to find it.

hi guys Do you know a way of identifying the winding that has multiple taps? Do you know some material on internet that explain this better?

Ok. When I link three monofasic transformers in delta or star what are the concerns to take about the polarity, capacity, rated current and tension?

hi guys, I want to know if it is always possible to link two transformers in series with different rated voltage. And if there is any concern about the polarity. If it is not possible in which conditions it can be done?

Let's suppose we have a disk which is charged to a constant potential V0, I just want the steps to find the surface charge density of the disk numerically. Only this. If it's possible, could you send to me an essay of matlab's code to perform this? Thanks.