Recent content by paul2211

Wow! Thank you so much. That makes a lot of sense! So just to confirm, for a non unity feed back with ##H(s)##, I would still plot the Bode Plot with ##L(s) = G(s) G_c(s) H(s)## for finding GM and PM. And this just shows how the open loop Gc(s)G(s) behaves in a closed loop with feedback H(s)...

I have two questions. One theoretical, and one pertaining to the homework question below. The theoretical question for which I am having trouble. When designing a controller to compensate a process using Bode Plots, why does my book seem to just use the forward loop gain rather than the...

V = 0 Volts is a short circuit, and I = 0 Amps is an open circuit. In an open circuit, the voltage is not zero because the resistance is infinite. All you know is that voltage = V = IR = 0*infinity. This is a meaningless value, and the equation essentially means the voltage can be any finite...

Hi berkeman, I am talking about distribution power lines, operating at around 12.5 kV. I believe 500 A (in the hundreds of Amps at least) in these is reasonable. My group project is about harvesting some energy from these power lines to power a uC to record some data for the electric utility...

The power supply circuit is essentially a secondary winding of a transformer, used for power harvesting. It steps down a power line's 500 A down to the reasonable mA range for our electronic circuits. Since the output current of my supply circuit is very dependent on the primary's current, I...

I am working on my graduation design project, and I am responsible for making the power supply circuit. It is a lower power source, and acts like a current source that can supply current in the range of 30 mA to 130 mA. My power supply circuit has a source impedance of 85 ohm. Our load, a...

Thanks for the answers about voltage regulators. They'll be very helpful once I find a good harvesting method. Yes, I am talking about harvesting energy from a powerline, and this is a graduation project proposed by the electric utility near my university. However, I guess a better person to...

I am working on my final year design project, and I will be using magnetic power harvesting from a power line to supply a microcontroller. I am thinking of using wires around an iron core, or just purchasing a CT for harvesting energy. If it is the CT, I am a bit confused on its ratings. If the...

Hi All, I am currently in my final year of engineering in Canada, and I'm starting to feel lost about what I want to do in life after graduation... whether to go get a masters or go work in industry. In regards to work, I believe my last co-op employer liked me enough to give me a good shot at...

Hi guys! I am wondering if any of you have any knowledge or anecdotes regarding the benefits of getting a graduate degree if one is thinking of doing Power Engineering (subset of EE for those of you who do not know). I am planning to go into the industry in the end. Currently, I do not see any...

I think I can give you some inputs on #1 and #3 in terms of courses. 1. The course I took was Communciation Systems which is quite similar to your class. It is much more of a math class than an EE course. The basics are of course the Fourier Transforms. Then, you deal with different...

I am actually quite confused on how a generator is supposed to be modeled... To add more power to a bus, we put more generators in parallel at the same voltage (which is the bus voltage). Therefore, I would say generators are current sources as more generator are put in parallel, more current...

In class, I would focus on the main ideas of the prof. If he says something very insightful, then write it down. Also for math / physics classes, I would definitely write down the examples. Back at home, once I study my notes + textbook and after doing some practice questions, I usually make...

This circuit at nodes A and B is already in Thevenin form: a voltage source of 10 V + source impedance of 3 + j4 kOhm... How would you choose the capacitance to make max power to be delivered to the load ZL = R + jXc? Hint: you want the max current to flow in this circuit, and use the fact that...

It's not in the exact form of the non-inverting amplifier, so you cannot use that equation in this problem. Best bet is to use nodal analysis and plug the matrix in MATLAB or something.