what are the important uses of dc generator and dc motor?

Answer 1

Uses of DC Generators:
Many DC generators are driven by AC motors in combinations called motor-generator sets. This is one way of changing alternating current to direct current. Factories that do electroplating and those that produce aluminum, chlorine, and some other industrial materials need large amounts of direct current and use DC generators. So do locomotives and ships driven by diesel-electric motors. Because commutators are complex and costly, many DC generators are being replaced by AC generators combined with electronic rectifiers. Rectifiers are devices that let current flow in one direction only. They permit use of simpler, more rugged AC generators, even when DC is required.

Uses of DC motors:
DC motors are used for a variety of purposes, including electric razors, electric car windows, and remote control cars. The simple design and reliability of a DC motor makes it a good choice for many different uses, as well as a fascinating way to study the effects of magnetic fields.

Answer 2

dc generators have been mostly supplanted by more efficient alternator style generators. this is particularly true where the mechanical rotation speed has to vary over a large range, such as an automotive engine.

dc motors have historically been prefered for applications requiring high power and smoothly variable speed. AC motors tend to work best when rotation is locked to the phase of the line frequency. dc motors can have the speed smoothly adjusted and in some applications can also act as a dynamic brake for slowing, a good example is the motors used in railroad locomotives.

Answer 3

It depends on the fan which you are going to put for your wind generator. If its able to produce more torque then you can go for the low rpm.Normally low rpm in DC motor means they have reduced the rpm by a gear box. I am not sure about the capacity of wind generator you preferring.

Answer 4

generates electricity(direct current) from mechanical energy.... the electricity it generates is different from those in the outlets of your house...