Originally Posted by oachalon
i am a junior in college for electrical engineering and for a long time you could only use transformers on ac but they have developed a transformer that will do dc without converting to ac. The big thing though is that it is very expensive. I actually read somewhere that one plant in california actually has dc going to it from the power company.
Good luck as an engineer. Thomas Edison of Edison Electric Works was the early adopter of Direct Current distribution. Broadway (in NYC) was all wired for DC. That's why early light dimmers were HUGE Rheostats. Very inefficient. Good old Thomas Alva believed that George Westinghouse (along with that damned Russkie, Nichola Tesla) were evil and murderous for believing in Alternating current. As to the modern distribution by DC, you need look no further than Central California, and the Northwest Intertie, operating at I believe 500,000 Volts DC. Directly adjacent to it is a 750,000 Volt AC Line. Go figger.
And yes, a tranformer can be used on DC. How do you think the Ignition Coil in your Gasoline Automobile works? (Pulses of DC).