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24 views

Books to study electrical Synchronous Machines [on hold]

Can anyone suggest a good book to study Electrical Synchronous Machines i.e. Synchronous Motors and Generators ?? Also please suggest some resources where I can get some good problems to solve related ...
649 views

Dry, wet and free voltage contact?

I would like to ask about three kinds of electrical contacts: dry, wet and free voltage. ...
106 views

Find the peak load of a power plant for the given load equation

The daily load demand of a grid is given by $$P=P_{max} \cdot cos(\pi t/24)$$ Here $-12hrs ≤ t ≤ 12hrs$. Maximum power occurs at ($t=0$) and minimum occurs at ($t= ±12$). A $10 GW$ hydro ...
184 views

High voltages Transmission lines?

I am having a doubt in why are the transmission lines are sent at a very high voltages? I also went through quite a few sources which said that it is to decrease the losses in the lines. BUt I am not ...
265 views

what happens in a seperately excited DC generator when load increased

A book about electrical machines states as below ...
315 views

Can I use a 220v engine to build up a RC car?

sorry for the noob question, but I'd like to build myself a small RC car. I've found this motor in a blender, which runs at 220v. Can I power it with a lower voltage? What should I use? Thanks a ...
424 views

Isn't current flow a wrong term?

In most text books and other electronics material it's said current is flowing through the circuit. Isn't this wrong? As current is flow of charge. Is there anything such as flow of flow of charge?
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Electricity consumption of electrical machines - why do they consume electricity when they are not turned on?

The question is, why do electrical machines consume power when they are not turned on (they are plugged into an outlet)? Also, suppose there is a seven-port USB hub with AC power. Is the power ...
437 views

Will a gas generator survive an EMP?

Not really sure where to ask this question. I was watching an episode of a TV show involving a gas generator and it got me wondering whether electricity could still be generated by a gas generator ...
162 views

Programmable power supply

I have assigned to design a kind of programmable power supply. Can't decide on a way to make it. Need help with this.. This is a high level block diagram of the required system ...
708 views

How do I modify a DC electric generator to get the same power at a lower speed?

This will be a theoretical question. Suppose that I have a DC generator, and I'm getting 300VA power from it when it rotates at 2000rpm. I want to make it run at a lower speed of about 700rpm, and I ...
302 views

How to detect surges in the main AC

Electronics have a habit of breaking in my house. In the last 2 years or so, I had 3 desktops, 1 monitor, 4 cellphones going dead. They are not completely dead like they won't turn on. But in the case ...
142 views

How does a large electric switch different from small?

Why do some electric appliances require to have a large electric switch to turn them on or off? If I use a small switch where a large switch is required, would there be potential possibility of ...
340 views

Rotating Platform That Starts and Stops Incrementally

I'm not sure this is the right place to pose this question, as it probably encompasses more than one field - EE, ME, programming, etc. But I'll ask the question anyway and hope that someone might ...
283 views

Which parts of this rotor can be made out of plastic?

I'm asked to redesign a rotor, by making as much parts of it as possible out of plastic. The issue is its weight, we want to make it as light as possible. Especially the shaft & axis of it is the ...
281 views

What are power cube transformers?

If I'm not wrong, is the term "Power cube transformers" is less commonly used to refer "A.C/D.C Adapter"? I couldn't find the use to this term.