What is meant by distribution factor?
The Distribution Factor is also known as the Breadth Factor or Belt factor or Spread factor. It is defined as the ratio of the actual voltage obtained to the possible voltage if all the coils of a polar group were concentrated in a single slot.
How do you find the pitch factor?
Pitch Factor is calculated by dividing the coil throw (–) 1 (coil span), by the number of slots per pole.
What is a pitch factor?
Definition of pitch factor : the ratio of the voltage induced in a short-pitch winding to the voltage that would be induced if the winding were full pitch.
What is meant by winding factor?
In power engineering, winding factor is a technique that is employed to improve the rms generated voltage or electromotive force (EMF) in a three-phase AC electrical machine so that the output voltage and hence torque does not have any harmonics in it which may reduce efficiency.
What is winding factor in induction motor?
What is the effect of distribution factor?
The distribution factor Kd for a given number of phases is dependent only on the number of distributed slots under a given pole. It is independent of the type of the winding, lap or wave or the number of turns per coil, etc. the distribution factor decreases as the number of slots per pole increases.
What is pitch factor and distribution factor?
We express it as the ratio of the phasor sum of the emfs induced in all the coils distributed in some slots under one pole to the arithmetic sum of the emfs induced. Distribution factor is, As pitch factor, distribution factor is also always less than unity. Let the number of slots per pole is n.
What is pole pitch and pitch factor?
Electronics & ElectricalElectronDigital Electronics. Coil span or coil pitch is defined as the distance between the two sides of a coil. Pole pitch is defined as the angular distance between the central line of one pole to the central line of the next pole.
What is pitch factor of alternator winding?
The pitch factor is the measure of resultant emf of a short-pitched coil in comparison with resultant emf of a full pitched coil. Hence, it must be the ratio of phasor sum of induced emfs per coil to the arithmetic sum of induced emfs per coil. Therefore, it must be less than unity.
What is EMF equation of alternator?
f = PN / 120 or N= 120f / P. Putting the value of N in Equation (i), we get, Average value of EMF per conductor = ∴ (N= 120f/P) If there are Z conductors in series per phase, then synchronous generator average E.M.F per phase = 2 f Φ Z Volts = 4 f ΦT Volts ….. (
What is coil pitch?
Coil span or coil pitch is defined as the distance between the two sides of a coil. Pole pitch is defined as the angular distance between the central line of one pole to the central line of the next pole. A pole pitch is always 180° electrical regardless of the number of poles on the machine.
What is slip and slip speed?
Slip and slip speed of an induction are used to define the relative motion of the rotor and magnetic fields. The slip speed of an induction motor is defined as the difference between synchronous speed and rotor speed.
What factors affect the toxicity of cord factor?
The length of the carbon chain on cord factor has also shown to affect toxicity; a longer chain shows higher toxicity. Furthermore, fibrinogen has shown to adsorb to monolayers of cord factor and act as a cofactor for its biological effects.
What is the use of chording angle in synchronous generator?
Chording angle in Synchronous Generator/ Alternator is introduced to tackle the problem of harmonics that couldn’t be taken care of during the design either in – Cylindrical Pole Rotor : As we can’t achieve a stepped sinusoidal mmf in the air gap, given that the manufacturers are reluctant to cut the slots with different dye’s as they are costly.
What is the role of cord factor in the pathogenesis of tuberculosis?
When cord factor is added back to those cells, M. tuberculosis survives at a rate similar to that of its original state. Cord factor increases the virulence of tuberculosis in mice, but it has minimal effect on other infections. The function of cord factor is highly dependent on what environment it is located, and therefore its conformation.