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What else can I help you with?
What does a Rotating magnetic field do?
The Field which is continuously rotating with a particular axis is known as rotating magnetic field. It will be created in Three phase induction motor's stator. When the supply is given to stator of three induction motor, the flux of each phases (that are displaced by 120 degrees) will interact. Due to this the resultant Field will be rotating Magnetic Field will be Produced.
Why the transformer is not working in DC supply?
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
What is the number of turn in single phase motor?
If you really do mean the number of 'turns', then you cannot really determine this, as it is determined as a part of its design process and can vary considerably from machine to machine.If, on the other hand, you actually mean 'windings' ('coils') then, typically, there are two: the 'main winding' and the 'auxiliary winding'. The purpose of the auxiliary winding is to supply a magnetic field that is out of phase with the main winding and which then results in a rotating magnetic field necessary to start the motor and turn in in the desired direction.
Is there a list of Nikola Tesla's inventions?
No but I can make one1. Tesla induction motor2. Tesla coil3. Alternating current (AC) electrical supply system that included a motor and transformer4.3-phase electricity.5.The rotating magnetic field produced by the interactions of two and three phase alternating currents in a motor winding
Principle and working of synchronous motor?
Principle of synchronous motor is as given below:"when a 3 phase winding is fed by a 3 phase supply, then a magnetic flux of constant magnitude but rotating at synchronous speed, is produced."
What is the purpose of the fields of a dc shunt motor?
DC Shunt motor: dc shunt motor is a motor with dc supply given to the inductor connected in parallel with the armature of a motor. The inductor connected in parallel with the armature of a motor called field winding of a motor.In dc shunt motor: When current flows through a conductor ( here it is armature in case of dc shunt motor ), magnetic field is produced which is circular and when this conductor is placed perpendicular in the magnetic field ( which is produced by the current or say dc supply that given to the inductor or say field winding of the dc shunt motor ), the main magnetic lines get bent due to the interaction of the two fields. These lines of force experience tension and try to become straight. So, a force is produced on the conductor ( armature ), due to which the conductor ( armature ) will rotates. The direction of force can be found by Fleming's right hand rule.Main Answer: Thus, it should be understood that field winding in dc shunt motor stands to get interaction of the two field in such a way that force is produced on the armature so that the armature get to rotate.Some Facts: Actually the current in armature is due to the mutual induction by field winding to the armature. That means only field winding get dc supply through which current and so magnetic field is produced in armature that try to oppose due which it is produced, that means it oppose the main magnetic field of field winding.
Why doesn't a transformer work only on a DC supplyand not in ac supply?
A transformer doesn' t work with DC current because voltage is induced in the output winding of the transformer when a magnetic field passes through the coils of this winding. This happens with AC current because the magnetic field is continually expanding and contracting. With a DC current the magnetic field is unchanging other than when you first turn it on. Since the magnetic field is not moving it is not moving through the windings and no voltage is produced.
Why don't we supply to DC to the transformer?
When we give d.c supply to a transformer the primary winding will burn because constent flux will be will be produced which doesnt link with secondary so max current will circulate on primary winding only
What is the principle of 3 phase induction motor?
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.
How is the synchronous motor made self starting?
The synchronous motor is made self starting by providing a special winding on the rotor poles, known as damper winding or squirrel cage winding. AC supply given to the stator produces a rotating magnetic field which causes the rotor to rotate, therefore, in the beginning synchronous motor provided with damper winding starts as a squirrel cage induction motor. The exciter moves along the rotor. When the motor attains about 95%of synchronous speed, the rotor winding is connected to exciter terminals and the rotor is magnetically locked by the rotating field of the stator and the motor runs as a synchronous motor. While starting a synchronous motor, the field winding must be shorted through a suitable resistance so that the induced voltage is distributed throughout the whole winding and no part is subjected to the high voltage induced in the entire winding.
Why ca you not use a transformer on a DC circuit?
Transformer can not be connected to DC supply because of the reason described as below:In case of AC Supply to the transformer, Current flows through the primary winding when the primary winding is given V1 voltage. So the alternating flux is produced in the core. This flux links with the winding and the emf E1 is used in the winding, which lags V1 by 180 degree. So only magnetizing current is drawn from the supply ( at no load ), whose value is very less.Now if the primary winding is connected to the DC supply, unidirectional flux is produced in the core, which does not induce emf in the primary winding. So the current is limited by the resistance of the winding only. Now the resistance of the winding is very less so it takes large current. So the fuse blows off as soon as the DC supply is given. If the thick fuse wire is used, the primary winding burns out.
How could you modify a solenoid to produce a stronger magnetic field?
Hi, By using two windings instead of one. One is a low resistance winding that provide the strong pulling force and a second one (the hold winding) to supply the holding force. When first turned on, both winding provide the strong pulling force needed to actuate the solenoid. As the plunger reaches its final on position, the strong winding is switched off by a built in switch actuated by the plunger. This winding arrangement is used extensively in car starters. René
