What is the principle construction and working of electric motor?
Hint:Electric motor uses the principle of magnetic force on a current carrying conductor. The direction of force depends on the direction of current flow and magnetic field. However, we can fix the magnetic field and create torque on a loop depending on the current flow. That is how electric motors are constructed.
What is an electric motor explain the working principle construction and working of a motor with diagram?
A power supply – In general, a simple motor has a DC power source. It provides power for the armature of the motor or field coils. Field Magnet (can be a permanent magnet or an electromagnet) – The magnetic field by virtue of Fleming’s left-hand law, helps to produce a torque on the rotating armature coil.
What is the role of commutator in electric motor?
The commutator assures that the current from the generator always flows in one direction. On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.
Why carbon brushes are used in electric motor?
In dc motors, the carbon brush makes sure the commutation process remains free from sparks and helps conduct electric current between the moving parts of the motor. A dc motor has several components, and each serves an important role in ensuring its proper function and efficient performance.
What is the function of brush in electric motor?
IN ELECTRIC MOTOR the function of brushes is to make contact with the rotating rings and through them to supply current to the coil. function of commutator in an electric motor is to reverse the direction of current through the coil periodically.
What is the role of brushes in electric motor Class 10?
Brushes: It conducts current between stationary wires and moving parts, most commonly in a rotating shaft. Split Ring: It helps to reverse the direction of current in the circuit.
What is the function of armature coil in electric motor?
In the armature, an electromotive force is created by the relative motion of the armature and the field. 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.
What is the function of commutator in electric motor Class 10?
The function of commutator or slip ring is to change the direction of current through coil after every half rotation.
What is the use of armature in a motor?
The main role of an armature is multi purposed. The primary role is to transmit current across the field, therefore generating shaft torque within an active machine otherwise strength in a linear machine. The second role of an armature is to produce an EMF (electromotive force).
What does a commutator do?
The voltage generated in the armature is alternating in nature, and the commutator converts it to direct current. Simply put, the commutator turns the coils on and off to control which direction the electromagnetic fields are pointing.
Is Dynamo and DC motor the same?
A dynamo converts mechanical energy to electrical energy, whereas an motorconverts electrical energy into mechanical energy. A dynamo takes in motion and outputs electricity and amotor takes in electricity and outputs motion.
What do motors and generators have in common?
A generator converts mechanical energy into electrical energy, while a motor does the opposite – it converts electrical energy into mechanical energy. Both devices work because of electromagnetic induction, which is when a voltage is induced by a changing magnetic field.
Can generator be used as motor?
In principle, any electrical generator can also serve as an electric motor, or vice versa. In hybrid vehicles and other lightweight power systems, a “motor–generator” is a single electric machine that can be used as an electric motor or a generator, converting between electrical power and mechanical power.
How are motors and generators difference?
Converting energy from one form to another is the key to understanding the differences between electric motors and generators. An electric motor converts electricity into mechanical energy, providing a power source for machinery. A generator does the opposite of this, converting mechanical energy into electricity.
Which is more efficient AC or DC motor?
AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.