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You have to sort of visualize the composite EM Field from the 3 phases. The 3 phases are offset 120 degrees from each other. Imagine 3 electromagnets in a straight line. Each magnet is connected to one of the phases. If the first one to the left is at peak (max magnetic field is over it), the other 2 are at less than peak, but the current in the left magnet is falling while the current in the center and right are building. The right is farther behind===> Center reaches peak first (Now the peak magnetic field is over the center). But the center current is falling while the right continues to build to peak. Now the peak magnetic field is over the right and the left has been building again ===> The magnetic field moves over the left again and the cycle repeats.
Now bend those 3 magnets into a circle ===> rotating field.
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Why current will reduces after motor runs in constant?
Because the slip angle between magnetic fields decreases as the rotor comes up to speed.
What are magnetic shading coils and what do they do in a magnetic motor Starter?
Shading coils provide a phase shift between the magnetic field of the rotor and stator, which is necessary to get the motor spinning.
Importance of reactive power?
So as to start the motor because reactive power helps create the magnetic fields in rotor.
Which principle is used in a DC motor?
Current carrying conductor kept in a magnetic field gets deflected. This is the basic principle. In short Lorentz force causes the rotation
Why use capictor in motor?
To create rotating magnetic field inside motor stator and it is done by capacitor. current drawn by motor running winding is lagging in nature when capacitor is connected in series with starting winding then the phase angle of running winding current and starting winding currents changes which creates a rotating magnetic field and motor is able to run.
Why current will reduces after motor runs in constant?
Because the slip angle between magnetic fields decreases as the rotor comes up to speed.
The operation of an electric motor depends on?
The operation of an electric motor depends on the interaction of magnetic fields, passing of electric current through coils of wire (armature), and the resulting electromagnetic forces that cause the motor to rotate. The direction of the current and the arrangement of the magnetic fields determine the direction of the rotation, while the flow of current and the strength of the magnetic fields dictate the speed and torque of the motor.
What characteristic of magnets is important in making a motor turn?
The characteristic of magnets important in making a motor turn is the ability to create a magnetic field. In an electric motor, interactions between the magnetic fields of the permanent magnets and the electromagnets cause the motor to turn by generating a rotating magnetic field that drives the rotation of the motor's rotor.
Why does the wire on an electric motor have to be coiled?
The wire in an electric motor is coiled to create a magnetic field when an electric current flows through it. This magnetic field interacts with other magnetic fields in the motor, causing the motor to rotate. Coiling the wire helps increase the strength of the magnetic field and improves the motor's efficiency.
How are magnets and motors related?
They both produce magnetic fields. So when together they attract.
Does induction motor has rotor winding?
Yes, the induction motor has a rotor winding. It is usually one turn, shorted. This is how the magnetic fields generated in the stator induce a current in the rotor, which subsequently generates a torque from the opposing magnetic fields, stator to rotor.
What does an electromagnet do when it is connected with wires and a motor?
When an electromagnet is connected to wires and a motor, the electromagnet generates a magnetic field when current flows through the wires. This magnetic field interacts with other magnetic fields in the motor, causing the motor to either spin or generate motion depending on the design and configuration.
What energy convertions happen in an electric motor?
In an electric motor, electrical energy is converted into mechanical energy. This conversion is achieved by the interaction of the magnetic fields generated by the flow of electric current in the motor's coils, causing the motor to rotate and produce mechanical work.
What kind of motor operates on the principle that like magnetic poles repel?
A linear induction motor operates on the principle that like magnetic poles repel. This type of motor uses electromagnetic fields to generate motion by inducing currents in a conductor.
What are magnetic shading coils and what do they do in a magnetic motor Starter?
Shading coils provide a phase shift between the magnetic field of the rotor and stator, which is necessary to get the motor spinning.
How is an electric motor similar to the aurora borealis?
An electric motor and the aurora borealis both involve the interaction of energy and magnetic fields. In an electric motor, electrical energy is converted into mechanical energy through the interaction of magnetic fields. The aurora borealis, on the other hand, is a natural phenomenon where charged particles from the sun interact with the Earth's magnetic field, creating beautiful light displays in the sky.
What changes electrical energy into movement energy?
An electric motor converts electrical energy into mechanical movement energy. This conversion is achieved through the interaction of magnetic fields created by passing electric current through wire coils in the motor. As the magnetic fields interact with the motor's rotor, it causes the rotor to turn, generating movement energy.
