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What does a armature or rotor do?
The Armature(or rotor) is a electromagnet inside a motor and alters the magnetic field inside the motor when it rotates. In DC motors it is connected to a Commutator. In AC induction motors the armature isn't connected to a power source.
What is reason for armature over voltage in 450 kw dc motors?
Here we used dcon digital dc drive
How are the series and shunt field windings of the compound wound dc motor connected relative to the armature?
series field in series with the armature shunt in parallel with the voltage supply the shut field increases the strength of the magnetic field with heavy loads to reverse the motors direction the fields remain the same you swap the armature leads
How will the armature current and the output power of a dc shunt motors change with increasing load?
With increasing torque load the armature tends to slow down; the motor draws more current to compensate, and if there is armature resistance the back emf generated by the armature falls to allow the increased current to flow, which causes the motor to settle at a lower speed. The mechanical output power is the speed times the torque, and increasing the torque increases the power output provided the speed does not drop much.
What is the difference between a field winding and an armature winding in any machine?
In electrical machines such as motors and generators, the field winding is responsible for producing a magnetic field within the machine. This magnetic field interacts with the armature winding, which carries the electric current and generates mechanical power. The field winding typically has fewer turns of thicker wire compared to the armature winding, which has more turns of thinner wire to handle higher currents.
What does a armature or rotor do?
The Armature(or rotor) is a electromagnet inside a motor and alters the magnetic field inside the motor when it rotates. In DC motors it is connected to a Commutator. In AC induction motors the armature isn't connected to a power source.
Why armature resistance is maximun in motors?
avoid high stating currents
How do you spell amiture?
The correct spelling is armature (wound coil in motors and generators).
What is armature or rotor?
An armature, often referred to as a rotor in the context of electric motors and generators, is the rotating component that generates electromagnetic force. In electric machines, the armature typically consists of coils of wire wound around a core, which produces electricity when it moves through a magnetic field. In motors, the armature receives electrical current, creating a magnetic field that interacts with the stator to produce motion. The design and function of the armature are crucial for the efficiency and performance of the machine.
What is reason for armature over voltage in 450 kw dc motors?
Here we used dcon digital dc drive
Why the armature voltage E changes when the field rheostat is varied in shunt motors?
In shunt motors, the armature voltage ( E ) changes when the field rheostat is varied because altering the resistance in the field circuit affects the field current and, consequently, the magnetic flux produced by the field winding. When the field rheostat is decreased, the field current increases, leading to a stronger magnetic field and a higher back electromotive force (EMF) generated in the armature. This results in a change in the armature voltage, as the increased back EMF reduces the net voltage across the armature. Conversely, increasing the field resistance weakens the magnetic field, reducing back EMF and allowing the armature voltage to rise.
Why use resistor grids in DC motors?
resistor grids were used in DC MOTORS during dynamic braking. in this method of braking a resistance ( variable) is connected across armature winding so as to dissipiate the energy. the energy thus dissipiated is used for braking of motors.
How are the series and shunt field windings of the compound wound dc motor connected relative to the armature?
series field in series with the armature shunt in parallel with the voltage supply the shut field increases the strength of the magnetic field with heavy loads to reverse the motors direction the fields remain the same you swap the armature leads
Difference between a stepper motor differs normal motor?
A normal motor run at a fixed speed depending on: AC motors: Voltage and frequency (Hetz) and number of poles DC Motors: Armature voltage Stepper motors speed depend on the drive pulse frequency.
What is the range of value of armature resistance in dc motor?
The range of armature resistance in a DC motor typically varies from a few ohms to several tens of ohms, depending on the motor's size and design. Smaller motors may have armature resistances as low as 1-5 ohms, while larger industrial motors can have resistances ranging from 10 to 50 ohms or more. The resistance affects the motor's efficiency and performance, particularly in terms of voltage drop and heat generation during operation.
What is the electrical term excitation mean?
Excitation is normally used to describe the current supplied to the field winding of a motor. A motor has a rotating armature with a coil that rotates in the magnetic field produced by a fixed field coil. The current in the field coil can be taken from a series or parallel connection to the armature coil, or (usually for larger motors) it can be supplied independently via some sort of controller. Excitation can be used to control the speed of DC motors or the power factor of synchronous motors.
What are bushes in electronics?
Brushes are pieces of carbon, generally square or rectangular that make contact with an electric motors armature passing electricity to the reolveing part a motor.
