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It has two main functions in a generator - firstly, it transfers the electrical energy from the (moving) armature coils to the (stationary) external electrical load circuit. The brushes are made of graphite, with a tiny trace of copper in it, so they're self-lubricating where they ruib on the copper commutator bars (those copper strips on the armature that the coil ends connect to).
Secondly, the electricity generated in the rotating armature coils is alternating current, and the brushes, working with the commutator acts like a switch to reverse the connections between the coil ends and the external circuit when the alternating voltage reverses its polarity (+ and -) to give direct current in the external circuit.
Have a look at http://community.myelectrical.com/wikis/myelectricalwiki/basic-generator-operation.aspx for more information.
What else can I help you with?
What is a pigtail on a dc generator?
Pigtail is a device to protect the brush from sparking
What is the best dc motor to use when building a wind generator?
A brush-less DC motor (BLDC)
What is the function of exciter rotor and stator in Generator Operation?
In the operation of a standard generator, the exciter rotor and stator provide DC-type energy to an AC-type supply. This allows the exciter to maintain a constant DC source.
Types of generators?
By the operation supply 1.AC generator 2.DC generator In DC generator we are having the following types according to the construction 1.DC Series Generator 2.DC shunt Generator 3.DC Compound Generator
What do you mean by DC generator?
DC generator is used to produce direct current. The basic DC generator have four basic parts 1. A magnetic field 2. A single conductor or loop 3. A commutator 4. Brushes
What is a pigtail on a dc generator?
Pigtail is a device to protect the brush from sparking
What is the best dc motor to use when building a wind generator?
A brush-less DC motor (BLDC)
Different types of DC generator?
There are two types me dc generator 1 separately excited dc generator 2 self excited dc generator
What happens if commutator of DC generator is removed?
If the commutator is removed from your generator, you (if you connect slip rings) get AC supply instead of DC supply. the function of the commutator is to convert AC to DC supply and vice versa.Additional AnswerRemoving the commutator will also prevent you from connecting the output of the generator to its load. Remember, the generator's armature is spinning!
Which is usually produced by a generator ac or DC?
An ac generator produces ac, a dc generator produces dc, it all depends on the generator.
What was the first DC generator name and inventor why it is call generator?
first dc generator is max generator donno who invented t
What is the function of exciter rotor and stator in Generator Operation?
In the operation of a standard generator, the exciter rotor and stator provide DC-type energy to an AC-type supply. This allows the exciter to maintain a constant DC source.
How do you make DC generator?
A DC generator is a DC machine that is driven by an external rotating force. It is constructed the same as a DC motor.
Types of generators?
By the operation supply 1.AC generator 2.DC generator In DC generator we are having the following types according to the construction 1.DC Series Generator 2.DC shunt Generator 3.DC Compound Generator
What are the part of generator?
In construction, dc machine (either generation or motor) consists of 4 parts mainly.. 1: Field Magnets 2:Armature 3:Commutator 4:Brush & brush gear.
Explain the construction and working of simple loop dc generator?
construction of DC generator
Explain the necessity and principles of commutator in Dc generator?
what is necessity of commutator in DC generator
