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In DC motor is the armature plus brushes resistance substantially the same for every rotational position of the armature why?
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The potentiometer is which type of tranducer?
The potentiometer is a position tranducer. It forms a resistance divider, proportional to position.
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.
Why armature rehostat is kept at maximum position?
In a series DC motor used for traction, the armature rheostat is there to limit the current on starting. In normal running the rheostat is set to zero ohms (maximum power) so that power is not wasted in it. At full speed the power is turned off, the vehicle then coasts along until it's time to stop.
Why the plot for output voltage from potentiometer as shaft position is a straight line?
Because the potentiometer has a linear curve for resistance. This won't be true for non-linear potentiometers, such as in a volume control application, which needs to be logarithmic.
How many ohm's is a 1M5 resistor?
The plural of 'ohm' is ohms, not ohm's.The alpha-numeric code for identifying the resistance of a resistor is quite straightforward.The letter is used as a multiplier. For example, k= x1000 and M = x1000 000. In other words, k represents kilo, and M represents mega.The position of the letter represents the position of the decimal marker.So,1M5 represents 1.5 x 1000 000, or 1.5 megohms.15M represents 15 x 1000 000, or 15 megohms.etc.Similarly,1k5 represents 1.5 x 1000, or 1.5 kilohms.15k represents 15 x 1000, or 15 kilohms.etc.
In DC motor is the armature plus brushes resistance substantially the same for every rotational position of the armature?
yes
How do you change a window motor in a 95 lumina apv?
I would clean the grease off of the commutator and brushes and put a 3/4" drywall screw through the thermal switch. All of these things are inside the motor. there is no need to remove the motor or regulator. Instead, remove the end cap ( where it plugs in) and pull out the guts of the motor ( end cap, brushes, springs and armature). Note the rotational position of the armature where it comes out of the motor easily. After repair, preassemble the guts ( paying attention to the rotational position of the armature) and reinstall into the motor.
Why the armature rheostat of dc is motor kept at maximum resistance position?
It isn't. It is only kept at maximum resistance when the motor is not running. That is done to limit the starting current.
Why is armature connected to a sprinngy steel strip?
In an electric bell, a flat steel spring brings the armature back to its original position.
What is the crankshaft sensor on a 1995 Chrysler Concorde?
The crankshaft position sensor measures the rotational position of the crankshaft for the engine computer. That info is required for fuel and ignition timing.The crankshaft position sensor measures the rotational position of the crankshaft for the engine computer. That info is required for fuel and ignition timing.
What is mean by armature reaction?
armature reaction means when load is added to the armature then current is passed through armature conductors then in armature creates flux. It is demagnetize and cross magnetize the main field flux. in other ward it is effect of armature field on main field.
What happens to the armature and the hammer when the electric bell is switched on?
When power is applied to the armature coil, the armature which has the hammer attached to it is drawn into the coil. The bell is struck by the hammer. At the end of the hammer stroke there is a N.C. (normally closed) contact which is opened. The opening of the contacts stops the current flow to the armature coil and the armature and hammer return to the off bell position. In the off bell position the N.C. contact re closes and the cycle is repeated over again. This cycling will continue until the bell circuit is turned off.
Do a square have a rotational symmetry?
Yes, a square has rotational symmetry. It has rotational symmetry of order 4, which means it can be rotated by 90 degrees, 180 degrees, and 270 degrees to coincide with its original position.
How many rotational symmetries does a kite have?
A kite has only one line of rotational symmetry, as it is only the same if it is tilted once. (back to its normal position).
What will happen if field rheostat of dc shunt motor is kept at maximum position while starting?
First remember this rheostat is connected in series with the armature to increase the total resistance to limit the starting current, thus achieving max starting torque from the motor
When a figure can be turned and appear to return to its original position it is called what?
Rotational symmetry.
What is a cam sensor on a dodge neon?
It tells the computer the rotational position of the camshaft.
