This course is on electrical power and some of it you will have seen in other courses, including some of the courses that are on this website. But having used portions of this course on the other lessons that I've taught on this website, I thought it was important to collect all the bits and pieces together and put together one comprehensive lesson or course on electrical power. Now mainly we're dealing with AC power, and it can be branched off to go into more detail on DC power, or it can go into more detail on electrical power in a three phase system. However, we cover it all on this course. And you can continue on in other courses. I'm quite excited about this course because it does answer a lot of questions that are out there because You deal with electrical power in other courses, you always seem to find holes in the course or you can't find the reason why certain things are done.

You will find it in this course. So, sit back and enjoy the course, I'm going to give you a brief peek into it right now. And later on, you can go through the course at your leisure, it's about three and a half hours of total time. But you don't have to spend three hours consecutively on this course, you can go away and come back whenever you want. So let's have a look at what we will be talking about on this course. The course starts out with something that is maybe a little bit more familiar to you and that is the visual things that you can see.

So we talk about power and energy and work done. In in forms that we can see and understand, I don't spend a lot of time doing that. But I do spend a little bit of time at the front end just so that we can visualize what is meant by energy power and work. We also have a look at what is called and defined as instantaneous power. because later on we're going to be going into something that is known as average power and average power is what you pay the utility bills on. And that is what your power meter on your house is reading.

So, we have a look at DC power. Then we look at instantaneous power, and then we go on to AC power. The visuals in this course I spent a lot of time putting them together so that you can come clearly understand what is going on. The phase shifts, the voltages, the currents, and the power graphs are all computer generated and form part of this course. So there's a lot of visuals that help you understand. Also, in this course, we use things called trig identities, and nothing got me more disappointed in in various courses when they just assume that you know, all the trigonometric identities that are out there, and we may did we may have known them at one time, but we have since forgotten a lot.

So any of the trig identities I spend a little bit of time here so that you can see how the trig identity is proven. And then we go on to use the trig identity in formulating some of the equations that are used in regard to AC power. We will look at reactive components in an AC circuit we'll look at both inductive and capacitive type loads as well as combinations of inductance, capacitance and resistance and we will analyze how the system works as far as the power consumption is concerned in regard to these types of loads. During this course we will use the trig identities that we proved and we will go through a fairly rigorous proof of average power and average reactive power. But we don't spend a lot of time going into absolute detail of the proof. We are more going into intuitive proofs, so that you know and can feel the actual formulas that you have to use.

Once we've established the equation for real and reactive power, we will then see how we use the RMS values for current and voltage in calculating real and reactive power. And as a final note on the power calculations in AC power, we will develop the power triangle, and we'll show you exactly how that power triangle works. We'll define the terms for a parent power For reactive power, and for real power, and we will see how they are related. Finally, we will define what is known as complex power. This is an area that is very confusing to a lot of technicians and technologists and engineers out there. Once they find out about AC power and apparent power in the power triangle, then all of a sudden, they're introduced to this thing called complex power.

And where the heck did that come from? three phase systems that you're using are usually valid. So the calculations are fairly easy to work with, which I will explain in the course. And I'll give you directions of where to go if indeed we have to work with unbalanced systems. So this ends the introduction. I hope inspired you to go on and take the course if you do I know you will not be disappointed.

I have spent hours and hours and hours putting it together so that it'll be easy to understand. And if you do, let me know what you think.