Table of Contents
- 1 What is a suitable material for an armature?
- 2 Why do we use armature in motor?
- 3 What is the armature of a motor made of?
- 4 Does AC motor have armature?
- 5 Why is soft iron used in electric motor?
- 6 Why armature is stationary in alternator?
- 7 What happens when an armature is used as an electric motor?
- 8 What is the function of armature winding in DC motor?
- 9 Why is the armature of a DC motor laminated?
What is a suitable material for an armature?
An armature can be made from any material that is damp-resistant and rigid enough to hold such plastic materials as moist clay and plaster, which are applied to and shaped around it. …
Why do we use armature in motor?
In electrical engineering, an armature is the component of an electric motor which carries alternating Current. When the machine or motor is used as a motor, this EMF opposes the armature Current, and the armature converts electrical power to mechanical power in the form of Torque and transfers it via the shaft.
Why is iron used as an armature in motors generators?
The core of a generator armature is made from soft iron, which is a conducting material with desirable magnetic characteristics. Any conductor will have currents induced in it when it is rotated in a magnetic field. These currents that are induced in the generator armature core are called EDDY CURRENTS.
What is the armature of a motor made of?
The core of the armature is made up of laminated thin metal plates instead of a single piece. The thickness of laminations depends on the supply frequency. It is approximately 0.5mm thick. The laminated silicon steel is used for the armature core to reduce the eddy current and hysteresis loss.
Does AC motor have armature?
AC and DC motors use the same principle of using an armature winding and magnetic field except with DC motors, the armature rotates while the magnetic field doesn’t rotate. In AC motors the armature does not rotate and the magnetic field continuously rotates.
Is armature present in AC motor?
In AC motors, the armature is stationary while the magnetic field rotates. In DC motors, the armature rotates while the magnetic field remains stationary. In AC motors, three input terminals (RYB) is present.
Why is soft iron used in electric motor?
Soft iron is used because it does not retain its magnetism when the current is switched off; in other words, it does not become permanently magnetized. To start with, the armature lies with only a part of it inside the coil.
Why armature is stationary in alternator?
It is difficult to collect from high voltage rotating armature . The alternators of small rating can build with rotating armature and stationary field coil. If high voltage armature winding can build rotating armature sparks are occur during collection of current at brushes . That’s why build stationary armature.
Do DC motors have an armature?
A DC motor has coils of wire mounted in slots on a cylinder of ferromagnetic material, which is termed the armature. The armature is mounted on bearings and is free to rotate. It is mounted in the magnetic field produced by permanent magnets or current passing through coils of wire, which are called the field coils.
What happens when an armature is used as an electric motor?
When the armature is used as an electric motor, due to relative motion between flux produced by the field winding and the flux produced by the armature winding the EMF is induced. This EMF will oppose the current of an armature and the torque produced in the rotor. And hence, the electrical power is converted into mechanical power.
What is the function of armature winding in DC motor?
Generally, the DC motor includes two windings such as Armature winding as well as field winding. Whenever we stimulate the field winding, then it generates a flux which connects by the armature, and this will cause an emf & therefore a flow of current in the armature. The applications of an armature include the following.
What is an armature and how does it work?
How does an Armature Work? An armature is used as an electric motor or generator. The armature is used to communicate between two magnetic fluxes. When the armature is used as an electric motor, due to relative motion between flux produced by the field winding and the flux produced by the armature winding the EMF is induced.
Why is the armature of a DC motor laminated?
In DC motor armature passes under stator north and south poles as it rotates. Armature is subjected to cyclic magnetisation. Hence to reduce losses core has to be laminated. In yoke magnetic field is of constant direction , hence no losses.