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What else can I help you with?
What is working principle of synchros?
when rotor excited by ac voltage , the rotor current flow , and a magnetic field is produced .the rotor magnetic field induced an emf in the stator coils by transformer action.the effective voltage induced in any stator coildepend upon the angular position of te coil's axis w.r.t rotor axis sthitaprajna.rath@gmail.com
How do you connect a diode across a ac coil?
You mean ac coil, the secondary coil, of a transformer? Then for the purpose of rectification, that is , for changing ac into dc, a diode is connected in series with the secondary coil of the transformer.
Derive emf equation of a DC machine?
equation of ac machine
What is coil pitch?
The distance between the two sides of an individual coil of and AC armature winding id termed the coil pitch.
What is the Function of inter poles in a DC machine is?
take care of the problem of induced AC field current due to armature reaction /Omara
What is the difference between ac and dc generators?
AC generator, the brushes run on slip rings which maintain a constant connection between the rotating coil and the external circuit. This means that as the induced emf changes polarity with every half-turn of the coil, the voltage in the external circuit varies like a sine wave and the current alternates direction. DC generator, the brushes run on a split-ring commutator which reverses the connection between the coil and the external circuit for every half-turn of the coil. This means that as the induced emf changes polarity with every half-turn of the coil, the voltage in the external circuit fluctuates between zero and a maximum while the current flows in one constant direction
Why you use diode to find indused emf?
A diode is used to find induced electromotive force (emf) because it allows current to flow in one direction, which helps in rectifying the induced voltage signal. When measuring induced emf in a circuit, the diode can help in isolating the effect of the induced voltage by blocking reverse current, thus providing a clearer indication of the magnitude and direction of the induced emf. This is particularly useful in experiments involving alternating current (AC) signals where the direction of current can change. Overall, the diode simplifies the measurement process by ensuring only the desired signal is registered.
What is working principle of synchros?
when rotor excited by ac voltage , the rotor current flow , and a magnetic field is produced .the rotor magnetic field induced an emf in the stator coils by transformer action.the effective voltage induced in any stator coildepend upon the angular position of te coil's axis w.r.t rotor axis sthitaprajna.rath@gmail.com
If the primary winding of a double wound transformer is supplied with the direct current its iron core will become magnetized but there will be no emf induced in the secondary winding?
BECAUSE YOU NEED AC EFFECT TO INDUCE EMF IN TO SECONDARY WINDING.OR DC PULSING.
How does a coil react to AC?
When an alternating current (AC) passes through a coil, it generates a magnetic field that constantly changes direction and magnitude in sync with the AC frequency. This phenomenon induces an electromotive force (EMF) in the coil due to self-induction, which can cause the coil to resist changes in current flow. The coil's impedance, which combines resistance and inductive reactance, affects how much current flows through it. As a result, the coil can store energy in its magnetic field, leading to phase differences between voltage and current in the circuit.
What type of currunt in induced in stator windings?
In the stator windings of an electric motor or generator, an alternating current (AC) is typically induced. This occurs due to the interaction of a rotating magnetic field with the stationary windings, which generates an electromotive force (EMF) according to Faraday's law of electromagnetic induction. In some applications, direct current (DC) may also be induced using a specific configuration, such as in a brushless DC motor. However, the most common scenario involves AC induction.
What is the difference between an AC and DC generators?
AC generator, the brushes run on slip rings which maintain a constant connection between the rotating coil and the external circuit. This means that as the induced emf changes polarity with every half-turn of the coil, the voltage in the external circuit varies like a sine wave and the current alternates direction. DC generator, the brushes run on a split-ring commutator which reverses the connection between the coil and the external circuit for every half-turn of the coil. This means that as the induced emf changes polarity with every half-turn of the coil, the voltage in the external circuit fluctuates between zero and a maximum while the current flows in one constant direction
What is Self induced emf?
when switch is closed then ac current flows in circuit. ac current is varies with the time as we changes the value of resistances ,current also changes because of this magnetic flux is introduced and result in induced emf generating in same circuit.
How do you connect a diode across a ac coil?
You mean ac coil, the secondary coil, of a transformer? Then for the purpose of rectification, that is , for changing ac into dc, a diode is connected in series with the secondary coil of the transformer.
What is the Opposition to current flow in a inductive ac circuit?
Back EMF.
Derive emf equation of a DC machine?
equation of ac machine
What happens when a wire is looped into a coil?
When you wind a current carrying wire into a coil, it causes the concentration of the magnetic field line to intensify. Depending on which pole of the magnet is in the up position, the wire will move towards or bend away from it.
