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because y phase is y phase ...it is not b phase or R phase so it is high
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∙ 10y ago
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What is a shading coil?
A shading coil induces currents to create an additional electrical phase. The coil pauses slightly to control magnetic flux. Delaying magnetic flux allows for a secondary rotating magnetic field to build.
What will happen if 2 phase load is connected to generator?
There is no such thing as a two phase load any more. Any two legs from a three phase system are classed as single phase. If this single phase load is connected across the generator it will induce an imbalance in the output voltages of the generator. This is one reason that single phase loads on a three phase generator should be shifted around to find the best possible balance.
How does a 3 phase induction motor continue to run during single phasing?
The magnetic field produced by the powered phase induces a voltage in the other two phases. Such a setup has no rotating field to start the motor, but it will continue to run if already turning. The power output will be less than normal. This is the principle used in so-called rotary converters, used to run 3-phase equipment from a single phase source.
What will happen if two phase supply given to the single phase motor?
Two phase is single phase for today's purposes. We generally do not call 240v single phase "two phase" anymore, although technically that's what it is. 240v two phase has power to both lines to the motor versus 120v single phase has one power line and a neutral. Fortunately most single phase motors today are dual voltage. So check your nameplate data of the motor for guidance. The use of proper motor protection will prevent any damage to motors if wrong voltages are inadvertantly applied.CommentA two-phase system is an archic system, in which two phase voltages are displaced from each other by 90 electrical degrees. Like three-phase, it had the advantage of producing a naturally-rotating magnetic field, so could drive induction motors without any need for a starting capacitor.
What would cause an electric motor to run backwards?
Motors running backwards: A DC motor wired backwards or magnetic field reversed. A 3 phase AC motor with 2 phases reversed A single phase motor will run either way unless it is 'persuaded' by means of a shaded pole or other method to rotate in a particular direction.
What is the phase difference between electric and magnetic field?
Zero.
Phase relationship between oscillating electric and magnetic fields?
nothing
How do you prove that a rotating magnetic field is produced when a 3 phase supply fed to a 3 phase winding?
The motor will turn
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.
In an electromagnetic wave the oscillating electric and magnetic fields are what?
In an electromagnetic wave, the electric and magnetic fields are perpendicular to each other and are in phase.
What is the phase relation between oscillating electric and oscillating magnetic fields in an electromagnetic wave?
The fields are in time phase and space quadrature.
What is the function of a capacitor in an induction motor?
It provides the phase shift necessary to have a rotating magnetic field for the rotor to spin. Answer #2: single phase induction motor can create pulsating magnetic field. due to single phase forward and backward torque created also they cancel led each other.so we want to extra force to rotate rotor either forward or reverse direction or we can give rotating magnetic field by using capacitor(phase split)
What is core magnetic balance test of transformer?
magnetic core balance test is used to find out the flux distribution. It can conduct either in HV side or LV side. In HV side, applying voltage between 2 phases and measuring the voltage across other phase.(eg.applying b/w U&V, and voltage b/w V&W , W&U measuring.) In LV side, applying voltage b/w any phase....and measuring voltage across other phases. Result: sum of measured voltage will be equal to applied voltage.
Why beta is not there in iron carbon phase diagram?
actually there is no difference in beta phase and alpha phase when we talk about crystal structure of iron. beta phase has the same structure as the alpha phase. the olny difference is the magnetic properties which are absent in beta phase due to the expanded lattice parameter.
Why three phase induction motor has uniform torque?
The 3-phase currents in the 3 coils of an induction motor will produce a steady rotating magnetic field.
For what storage medium are phase change alloy used?
For what storage medium are phase change alloys used?
What is idmt over current relay with different plug setting multiplier?
Any nonlinear load on a system generates harmonics. Exampes are the magnetic core of a transformer or equipment which uses rectifiers to produce direct current. The triplen harmonics are unpopular because they add on a three-phase system, so they produce current in the neutral, which a three-phase system in balance does not.
