#### • Class 11 Physics Demo

Explore Related Concepts

# dc generator diagram

Question:http://www.circuitstoday.com/melody-generator-using-ic-um66 i want to use it with my own circuit power supply is 9V dc

Answers:You can use a 3 terminal regulator like the LM138. download the datasheet, it has schematics on it. But I'd think it would be easier to just get a new supply. .

Question:Is it in the number of coils? For an AC generator, how does the coil continually rotate up and back down again? Does it have to do with force from a magnetic field? Any diagrams helpful. Thanks.

Answers:The only significant difference in physical construction between an AC and DC generator is the rotor's electrical connections. In an AC generator, they are made with slip rings. In a DC generator, it is made with a commutator. Both of these are connected by carbon brushes that ride along the slip rings or commutator as they spin. A slip ring is a continuous ring of copper used as a connection point. A commutator is a series of small copper segments arranged into a ring shape, each segment being a different connection point than the one next to it. Otherwise, in theory, the two are basically identical, at least physically. They are operated rather differently. As far as a moving coil in an AC generator, the only coil that moves is the field winding contained within the rotor. It is supplied with a DC voltage (referred to as exciting the field, which turns it into an electromagnet, which spins with the rotor. The magnetic field it produces spins along with it. The movement of the magnetic field across the stator windings (the non moving part of the generator) causes an AC voltage to be induced in the stator windings.

Question:In my algebra/triganometry-based physics class (on electricity and magnetism) and yesterday our professor went over how to convert and AC generator into a DC generator; it got kind of confusing so i tried to read it over in our book but there's only like 3 senteceson it... could anyone help explain it to me in a simpler way? thanks. in response to the first reply... sorry, i meant how would you convert an ac generator into a dc one, not change it up entirely

Answers:Do you mean, convert AC into DC, which would use a diode bridge circuit, or take an actual AC generator and turn it into a DC generator? I can't think why anyone would want to do the latter. At the least is would mean swapping the slip rings for a commutator......that really would be confusing. Surely not. I think you need to repost and be a bit more explicit about what the problem is. :-)

Question:and why DC generator cannot be converted into an AC generator?please also explain why alternating voltage can travel long distance but DC cannot?

Answers:AC generators can be converted into DC generator by means of a RECTIFIER. DC generator can be converted into AC generator by means of an INVERTER, just it is more complicated. DC and AC can both travel long distances just it easier to work with AC than DC. In order to avoid losses in the transmission lines is better to have very high voltages in there, however we actually use low voltages in houses and industry so in order to have a efficient electrical system we need to be able to change from low voltage to high and back easily, this can be done for AC, easily, by means of a TRANSFORMER. To change the levels of voltage in DC is much more complicated and much less efficient (but it can be done), then it is much easier and much less costly to use AC and if we need DC we can easily get it from AC.