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to avoid sparking ,since their is no e.m.f induced in magnetic neutral axis.
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∙ 11y ago
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What are the Difference between dc motor and dc generator?
a motor Will do work by consuming power a generator is just the opposite
What is commutation in DC machines?
It is the process of conversion of generated ac voltage into the armature of a dc generator to dc voltage at the terminal of the dc generator by use of pair of brushes and commutator. OR It is the process of conversion of given dc voltage at the terminal of the dc motor to ac voltage in the armature windings in a dc motor by use of pair of brushes and commutator.
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 are the parts and construction of DC geneartor?
The parts of dc generator are 1)armature coil 2)field magnet 3)split rings 4)brushes
Why are the brushes of a dc machine always placed at the neutral points?
The function of brush is to collect current from rotating commutator and supplies the current to external stationary load. The brushes of a DC machine are placed at neutral points because the current in the rotating part drops to zero at the neutral point. If brushes are placed in location other than the neutral points, then the current may be switched off and it causes magnetic field and it may also create voltage spikes and arc at brushes.
In a dc generator brushes are placed in which side to avoid armature reaction?
along the M.N.A axis along the M.N.A axis
What are the Difference between dc motor and dc generator?
a motor Will do work by consuming power a generator is just the opposite
What is commutation in DC machines?
It is the process of conversion of generated ac voltage into the armature of a dc generator to dc voltage at the terminal of the dc generator by use of pair of brushes and commutator. OR It is the process of conversion of given dc voltage at the terminal of the dc motor to ac voltage in the armature windings in a dc motor by use of pair of brushes and commutator.
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
In a DC generator if the brushes are given a small amount of forward shift the effect of armature is?
is fully diamagnetise
Why are brushes staggered in dc motor?
To avoid sparking they need to be placed at zero point
What are the parts and construction of DC geneartor?
The parts of dc generator are 1)armature coil 2)field magnet 3)split rings 4)brushes
Why are the brushes of a dc machine always placed at the neutral points?
The function of brush is to collect current from rotating commutator and supplies the current to external stationary load. The brushes of a DC machine are placed at neutral points because the current in the rotating part drops to zero at the neutral point. If brushes are placed in location other than the neutral points, then the current may be switched off and it causes magnetic field and it may also create voltage spikes and arc at brushes.
Different types of DC generator?
There are two types me dc generator 1 separately excited dc generator 2 self excited dc generator
Answering Which one is a separately excited generator - ac generator or dc generator?
Excitation is the phenomenon by which you control the excitation of field winding of a generator. In DC generator field winding is placed on stator and this field winding can be self excited or seperately excited depending upon the type on generator used. AC generators can also be self excited or seperately excited type but field winding is placed on rotor nad armature winding on stator.
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 is the probable cause for no voltage generated in a DC compound generator?
In any DC generator the causes to fail to produce voltage is loss of residual flux in the field or fields , poor brush contact in the commutator(clean the brushes and commutator) , check all the terminals of the generator and voltmeter may not be functioningand lastly check the coupling and the prime mover is rotating.
