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this is the only way the motor will turn
in a 2 pole motor if you move the brushes 90 degrees one way the poles will attract each other
90 degrees the other way they repel and there would be some oscillation until it did the shift to the non repelling state
the brushes arent at the geometric null since when its running the null shifts a bit because of residual magnetism
the brush rings can be shifted a bit to get the dynamic null at normal load conditions, less arcing, less brush wear
Wiki User
∙ 11y ago
Wiki User
∙ 10y agoA geometrical neutrals axis is a dc machine that converts energy that is mechanical into electrical energy. The electrical generator is based on the main principle when flux is cut by a conductor.
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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
How to calculate Q first moment of inertia above and below the neutral axis?
-find the area(A) of the shape above the neutral axis (or above a particular point if given) - locate the centroid (y')of the shape relative to the neutral axis(or above point) using y' = ∑AiYi / ∑Ai - first moment of area = A*y' (or y' + distance of given point from neutral axis)
What is W-axis on a milling machine?
The W-Axis on a milling machine is the quill travel. The quill is located in the head and houses the cutting tool.
If the neutral axis of a reinforced section is above the critical section what is the section called?
Under Reinforced Section
What does MNA in AC motors stand for?
The meaning of MNA is Magnetic Neutral Axis. It can be defined as the axis along which no emf is produced, as the armature conductors moves parallel to the field flux lines. The scope of how it works is to great an explanation for this site.
Why is brushes placed at MNA in a dc generator?
to avoid sparking ,since their is no e.m.f induced in magnetic neutral axis.
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 is magnetic neutral axis in dc machines?
connects the brushes to obtain a good commutation. its also a line joining two points at which no emf is induced.
Can a DC motor work on an AC supply?
There is a motor that is known as Universal motor which works on DC or AC .You might find one in a drilling machine or a domestic grinding machine .But there is a disadvantage ,in that there will be sparking at the commutator between the brushes and the commutator segments due to a shift in the magnetic neutral axis while on AC operation.
How do you calculate neutral axis of a wooden beam?
In order to compute the neutral axis of a beam, we need its dimension and shape.
Which neutral country was surrounded by axis conquest and axis countries?
Switzerland
What variable is placed in the x axis or horizontal axis?
The variable x. If there is an independent variable it would be placed on the x axis but there need not be one.
What is neutral axis of a beam?
The Neutral Axis of a concrete beam is that axis where it is neither in tension nor compression. The transition of tensile to compressive forces set up due to bending occurs on the neutral axis. Its position in a beam depends on material properties of the concrete and reinforcing steel.
Was Mongolia allies or axis?
No. It was actually a neutral country.It actually remained neutral.
Where is the data collected placed on a graph?
on the vertical axis
Which variable is placed on the x-axis?
the independent variable is on the x-axis
How to calculate Q first moment of inertia above and below the neutral axis?
-find the area(A) of the shape above the neutral axis (or above a particular point if given) - locate the centroid (y')of the shape relative to the neutral axis(or above point) using y' = ∑AiYi / ∑Ai - first moment of area = A*y' (or y' + distance of given point from neutral axis)
