What enhances power of motor?
The combination of soft iron core and coil is an armature. It enhances the power of motor. Thus, commercial electric motors do not use permanent magnet to rotate the armature because permanent magnets are weak and do not produce strong magnetic field in the region.
Why are electric motors important?
Electric motors impact almost every aspect of modern living. Refrigerators, vacuum cleaners, air conditioners, fans, computer hard drives, automatic car windows, and multitudes of other appliances and devices all use electric motors to convert electrical energy into useful mechanical energy.
What makes an electric motor weak?
The most common cause of motor failure, and arguably the most difficult to overcome, is low resistance. Low resistance is caused by the degradation of the insulation of the windings due to conditions such as overheating, corrosion, or physical damage.
What is the difference between electric motor and commercial motor?
In electric motors, the split ring acts as a commutator. … In commercial motor an electromagnet is used in place of permanent magnet. Commercial motors have more number of turns of conducting wire in current carrying coil. Commercial motors have soft iron core on which the coil is wound.
How can you increase the speed of motor?
The speed of the rotation of the electric motor can be increased by changing the resistance of the circuit, by decreasing the resistance of the electric motor, there is the increase of the current then the current strength will increase.
How can the power of an electric motor be increased explain with any three points?
We can increase the turning force (or torque) that the motor can create in three ways: either we can have a more powerful permanent magnet, or we can increase the electric current flowing through the wire, or we can make the coil so it has many “turns” (loops) of very thin wire instead of one “turn” of thick wire.
What are the disadvantages of electric motors?
Disadvantages can include the need for a high starting current, as well as lower efficiency due to a need for magnetization. It is important that your service and support protocols anticipate these considerations, and others, to maximize performance and reliability.
What is the main function of electric motor?
An electric motor is a device used to convert electricity into mechanical energy—opposite to an electric generator. They operate using principles of electromagnetism, which shows that a force is applied when an electric current is present in a magnetic field.
Does motor need electric?
How do motors work? Electric motors work by converting electrical energy to mechanical energy in order to create motion. Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current. … Electric Motors have an array of applications.