I came across a question that was asked to me quite a couple of time: When to use I²R, V²/R or VI while calculating power? At first, the question looks simple and as if it needs no formal explanation but that's not the case. Use of any of them will give the correct result provided that you apply it correctly. Correct application is possible only when you understand the type of circuit you are dealing with. Another important point is to use the one which is going to take less time and help you calculate easily. All of the three equations tell the same thing but their usage is subject to the type of problem you're trying to solve. Let us understand when, how an what to use while calculating power in an electrical circuit.
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Electric generation from fan. How about it?
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The Reverse Psychology
One of the c'mon questions always revolve around is that is it possible to convert any sort of Electric motor to electric generator. Well the answer is yes except a few which can't. DC motors and generators are ideal machine for this because one can be easily converted to other just by changing the input from Electrical to mechanical or vice-versa.
The normal type or simplest motor that we use in our household is a fan or better if you have an exhaust fan or a table fan rather than a ceiling fan. The electricity when provided to a single phase Induction motor within this fan, it produces torque for the fan to move. But as I said, it is easy to convert a motor to generator just by changing the input from electrical to mechanical, is it possible here in case of a fan? Well yes, and I have made this video to describe how this motor can be used for generating electricity though not useful enough except lighting some LEDs, but this is really a great, fun and simple experiment to try out. Just check it out here and try it yourself. Better if you use an old fan which has been used quite a lot rather than a new one. I will explain how does that works in the coming posts. So, stay tuned and don't forget to SUBSCRIBE OUR BLOG to get notified about our blog update in your E-mail first.
Here's the video on YouTube. Subscribe my channel on YouTube to get good tutorials and DIYs on Electrical Engineering.
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We have been using various electrical appliances in our household having such socket plugs as shown above. The upper pin is called an earth pin while the lower two are live and Neutral. But have you ever wondered why the earth pin looks so different than the other two pins? If you had, here's the answer. An earth pin is used to discharge any electric current flowing through the metallic enclosure of an electric appliance due to some internal fault or loose connection to the earth. The current flowing through the metallic enclosure is taken up by an earth wire in the appliance and is sent to earth through the earth pin in the socket. Now in no way, the earth pin should be inserted in live or neutral hole on the socket because in that case, current would flow through the earth pin to the appliance and also will result in burn-out as well as insulation breakdown. That's why, the earth pin is made thick or different in dimension than the other two pins so that
Happy New Year everybody out there and sorry for the late update. So, This video describes how to make a full bridge rectifier SIMPLY and CHEAPLY at home using basic transistors. Must watch. I hope you will like this video. Please share this video if you have liked and do subscribe to my channel. This encourages me to bring more such informative videos on Electrical Engineering in future for you. Thanks.
Variable Voltage Variable Frequency Drive (VVVfD) is one of the best and efficient methods of starting an Induction Motor Drive as well as it provides a smooth and wide range of Torque-Speed control. It saves electrical power and provides good motor starting and running characterstics. VVVfD controls the V/f (Volt/Hz) fraction to let the motor drive achieve good Torque-Speed characterstics as required. Hence it is also called, VSD - Variable Speed Drive or AFD - Adjustable Frequency Drive or Inverter based Drive as it uses Inverter to achieve the set points. But how VVVfD works and why it is better than various other methods of Starting and Speed Control of Induction Motor based applications. Let's discuss the Theory, Working, Advantages and Applications of a VVVfD in detail.
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