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What is neutral plane?

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Anonymous

9y ago
Updated: 3/6/2022

The neutral plane in mechanics is a conceptual plane within a cantilever or a beam. It is also called the neutral surface.

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Eino Rolfson

Lvl 13
3y ago

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Related Questions

What is the neutral plane?

The neutral plane is a concept in structural engineering that refers to the plane within a beam where there is no stress or strain resulting from bending. It is the boundary between the tensile and compressive regions of a beam subjected to bending loads.


Armature reaction in a DC generator?

ARMATURE REACTION in DC MachineAll current-carrying conductors produce magnetic fields. The magnetic field produced by current in the armature of a dc generator affects the flux pattern and distorts the main field. This distortion causes a shift in the neutral plane, which affects commutation. This change in the neutral plane and the reaction of the magnetic field is called armature reaction.


Remedies for Armature reaction?

Since an armature is wound with coils of wire, a magnetic field is set up in the armature whenever a current flows in the coils. This field is at right angles to the generator field, and is called cross magnetization of the armature. The effect of the armature field is to distort the generator field and shift the neutral plane. The neutral plane is the position where the armature windings are moving parallel to the magnetic flux lines. This effect is known as armature reaction and is proportional to the current flowing in the armature coils. The brushes of a generator must be set in the neutral plane; that is, they must contact segments of the commutator that are connected to armature coils having no induced emf. If the brushes were contacting commutator segments outside the neutral plane, they would short-circuit "live" coils and cause arcing and loss of power. Armature reaction causes the neutral plane to shift in the direction of rotation, and if the brushes are in the neutral plane at no load, that is, when no armature current is flowing, they will not be in the neutral plane when armature current is flowing. For this reason it is desirable to incorporate a corrective system into the generator design. These are two principal methods by which the effect of armature reaction is overcome. The first method is to shift the position of the brushes so that they are in the neutral plane when the generator is producing its normal load current. in the other method, special field poles, called interpoles, are installed in the generator to counteract the effect of armature reaction. The brush-setting method is satisfactory in installations in which the generator operates under a fairly constant load. If the load varies to a marked degree, the neutral plane will shift proportionately, and the brushes will not be in the correct position at all times. The brush-setting method is the most common means of correcting for armature reaction in small generators (those producing approximately 1000 W or less). Larger generators require the use of interpoles.


What is cross magnetization?

In spirituality, cross magnetization occurs when two mediums treat a patient at the same time.In physics, specifically electromagnetism, cross magnetization occurs when the flux-density distribution of the magnetic field that's defining the neutral plane gets distorted by a secondary magnetic field, known as the armature field. This distorting effect, which effectually changes the direction of the neutral plane, is called the armature reaction drop, and is controlled by varying the current through whichever of the two magnetizing devices was designed as the electromagnet.


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