At CSM, people typically study two very different types of electrical engineering.Power systems deals with big voltages, let’s say greater than 100V and all the way up to 500kV and more (as well as big devices, physically speaking)Control Electronics deals with small voltages, let’s say less than 100V, although usually less than 12V if you’re using computer systems (as well as small devices, physically speaking)
So let’s talk about power systems. What are the different parts of the power system? Electricity has to be generated.The picture above is one of several (four, I think) electric generators at Fort St. Vrain in Colorado. Originally, Ft. St. Vrain was a nuclear power plant. The system uses intakes air on the left side and compresses it to mix with natural gas in a turbine generator in the middle. The turbine generator is basically a jet engine bolted to the ground so it doesn’t go anywhere. The turbine is connected to an electric generator. The single tower toward the right is part of the heat recovery steam generators (HRSG), which uses the hot air for the turbine exhaust to heat water which is than used to drive steam turbines (originally used when it was a nuclear plant) to generate even more electricity.The several towers at the far right are part of the noise and contaminant abatement system.What other types of electric generators are there? Coal, nuclear, photovoltaic, wind, hydroelectic.
One we generate electricity, we have to move it. How do we do that?Power lines of course. What types of power lines are there?500kV125kV50kV10kVEtc3-phase system
Types of electric machinery.All use electromagnetic principles to accomplish their goals. Electric generators, electric motors, transformers.Electric generator on the left is at Boulder Hydroelectric. They have two turbines which can generate 2.5MW each (5MW total).The transformer on the right at Ft. St. Vrain. It takes 21kV and makes it 230kV. It’s rated at 403000KVA. Why do we use transformers?
What’s going on here? Opening up a relay at a transformer yard.http://22.214.171.124/frames/longarc.htm#500_kV_SwitchSource: Neil Brady/http://126.96.36.199/frames/mpg/500kV_Switch.mpg
What is this?Electrical engineers also build small things, like iPods.
Electrical engineers also program microcontrollers. They’re sort of like computers, but not.
Here’s an example of some Assembly code. What does this code do? This takes an 8-bit unsigned value in register B and returns in register D the next larger power of two.
FPGA’s very useful (and common place) for quickly creating complex logic gate arrangements.
Here’s a logic gate, a JK flip-flop. Electrical engineers also program these
Electrical engineers also build regular old circuits. This is an inverter circuit.
Electrical Engineering by Andrew Ferguson (http://andrewferguson.net/2009/03/18/electrical-engineering-presentation/) is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License (http://creativecommons.org/licenses/by-nc-sa/3.0/us/).Permissions beyond the scope of this license may be available at http://andrewferguson.net/some-rights-reserved/.
Electrical engineering…<br />Field of engineering that deals with the study and application of:<br />Electricity<br />Electronics<br />Electromagnetism <br />Source: http://en.wikipedia.org/wiki/Electrical_engineering<br />
Colorado School of Mines<br />Power Systems<br />(Big)<br />Control Electronics<br />(Small)<br />
Generation<br />Photo: Andrew Ferguson (http://www.flickr.com/photos/afdn/2578386123/ )<br />
Transmission<br />Photo: Andrew Ferguson (http://www.flickr.com/photos/afdn/2579170922/)<br />Photo: Andrew Ferguson (http://www.flickr.com/photos/afdn/2532600693/)<br />
Electric Generators and Transformers<br />Photo: Andrew Ferguson (http://www.flickr.com/photos/afdn/2313470403/)<br />Photo: Andrew Ferguson (http://www.flickr.com/photos/afdn/2578334819/)<br />
Power Maintenance at the Stanford Linear Accelerator Center<br />
We Build What?<br />Source: www.appleinsider.com/article.php?id=3169 <br />
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