yeah ,if we consider a 3 phase dc motor ,the rotating magnetic field is produced by rotating the permanent magnet with a constant speed.
Of course current matters! If you didn't have a current, then you wouldn't have a magnetic field; without a magnetic field, you wouldn't get any torque, and the motor wouldn't work!
Produces magnetic fields, that are used in generators, inductors and motors. The magnetic field at any given point is specified by both a magnitude and a direction.
It really depends on what you mean by 'simple'. Motors don't come much simpler than a three-phase induction motor, whose field windings provide an automatically-rotating magnetic field and whose rotor doesn't require any connection to an external supply.
any material can insulate magnetic field
Electrons have a charge. Any moving charge creates an electric field, e.g. electricity moving through a wire causes a magnetic field around the wire, or the earth rotating creates a magnetic field which causes a compass to point north. Similarly all electrons have a spin factor. similar to the earth rotating, the spin of electrons create a magnetic field around the electron.
When three phase supply is given to the three phase stator winding of the induction motor,a rotating magnetic field is developed around the stator which rotates at synchronous speed.This rotating magnetic field passes through the air gap and cuts the rotor conductors which were stationary.Due to the relative speed between the stationary rotor conductors and the rotating magnetic field,an emf is induced in the rotor conductors.As the rotor conductors are short circuited, current starts flowing through it.And as these current carrying rotor conductors are placed in the magnetic field produced by the stator, they experiences a mechanical force i.e. torque which moves the rotor in the same direction as that of the rotating magnetic field. the induction motor can't run at the synchronous speed because at synchronous speed the induction motor can not develop any torque to move the rotor from its stationary position.
well as the name mention production of magnetic field due to rotation. if we consider three identical coils axis physically by120* each and 3 phase supply given then their is the production of aleternating magentic field in each coil
Yes; any current produces a magnetic field, an AC current will produce an alternating magnetic field. If the current (and therefore the magnetic field) changes quickly, you may not be able to detect it with a compass needle, for example.
Yes, a round magnet rotating in a coil of wire can produce electricity through electromagnetic induction. As the magnet spins, it generates a changing magnetic field that induces a current in the coil according to Faraday's law of electromagnetic induction. This current can be harnessed as electrical energy.
Lots of things can change it like a bigger planet right next to earth, a black hole, even humans. Those are the things I can come up with so far, but all I know that it has to be either huge and/or destructive. If the liquid center of the Earth is charged and rotating, it creates a magnetic field. If the rotating is reversed, for any reason, the magnetic field reverses.
No, Eris does not have a magnetic field. It is a dwarf planet located in the outer solar system and does not exhibit any magnetic field like some other planets do.
When a compass is brought into a magnetic field, the needle of the compass will align itself with the magnetic field lines. This is because the needle is a magnet itself and is influenced by the magnetic field of the Earth or any external magnetic field it is brought into.