Introduction to Coil Span or coil pitch:
It is the distance among the two active sides of similar coil under adjacent opposite poles. It is described in terms of number of slots each pole or electrical degrees.
Full pitch coil:
A coil comprising a coil span equal to 1800ed is termed as a full pitch coil.
Short pitch coil:
A coil comprising a coil span less than 1800ed through an angle â, is termed as a short pitch coil, or fractional pitch coil. It is also termed as a chorded coil.
á= 0 for full pitch winding
á = xâ for short pitch winding
also á = 180
S/p
Where á stands for = short pitch angle or an angle less than 1800 ε
â stands for = angle between adjacent slots
X stands for = 1, 2, 3,... an integer
Illustration 3: Find the angle between adjacent slots of a 3 phase, 6 pole motor having 36 slots.
Solution: slots per pole = 36/6= 6
According to the equation 8 â = 180/(s/p)= 300 ε
Pitch Factor / coil span factor / chording factor, KP: while the two sides of similar coil are short pitched through an angle á, as displayed in the below diagram (b), the emf induced in the two coil sides comprise a phase angle difference of á0. Because of phase angle difference, the actual emf is reduced through a factor cos α/2 and is termed as a pitch factor / coil span factor / chording factor.
KP = cos α/2
Illustration 4: Find out the pitch factor for a three phase 4 pole ac machine wound in 36 slots with a coil span of 1400ε.
Solution: by the diagram (b) below, short pitch angle, á = 1800 - 1400 = 400ε. From above equation:
Kp = cos (α/2) = cos (40/2) = 0.94
Diagram - Full Pitch and Short Pitch coils
Distribution Factor, Kd: It is described like the ratio of phasor addition of emfs induced in every the coils distributed in m slots within 1 pole region to their arithmetic addition of emfs induced in all the coils distributed in m slots within 1 pole region.
Kd = [Sin(mβ/2)]/[m Sin(β/2)]
Where m = s/3p = number of slots per pole per phase
Illustrations 5: calculate the distribution factor for a 3 phase 4 pole ac machine wound in 36 slots with a coil span of 1400ε.
Solution: From equation, m = 36/(3x4) = 3
The angle between adjacent slots: â= 180/(s/p) = 180/(36/4) = 20o and Kd = 0.96
Winding Factor, KW : It is described like the product of pitch factor and distribution factor.
Equation: KW = KP KD
Latest technology based Electrical Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Coil Pitch homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Coil Pitch, project ideas and tutorials. We provide email based Coil Pitch homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Coil Pitch. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Coil Pitch. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
tutorsglobe.com theories of wages assignment help-homework help by online wages tutors
www.tutorsglobe.com offers answering questions to profit maximisation and loss minimisation, for perfect competition assignment help - homework help by economics tutor's help.
We all are well known with the everyday routine; we rinse our hair and after that automatically pick up the hairdryer, flip the switch and there are the warm air to dry fast and let us get on with the day.
The limitations and difficulties faced through the Inter firm comparison since Inter firm comparison in its honest use and because cannot be difficult to any segment in it.
tutorsglobe.com direct and indirect taxes assignment help-homework help by online types of tax tutors
tutorsglobe.com surgical techniques assignment help-homework help by online contraception tutors
tutorsglobe.com runner assignment help-homework help by online sub-aerial modifications tutors
tutorsglobe.com treatment of leishmania assignment help-homework help by online leishmania tutors
electrolysis and redox reactions tutorial all along with the key concepts of electrolytes and non electrolytes, electrolytic conduction and electrolysis, redox reactions and electrochemical cell
horizontal deflection section consists of a driver and an output amplifier. horizontal frequency is amplified through the two amplifiers and delivered to the horizontal deflection coils and generate horizontal scanning.
Acid-Base Titration tutorial all along with the key concepts of Classification of Solvents, Monitoring pH changes, Titration of Strong Acid against Strong Bases, Titration of weak Acids against Strong Bases, Detecting the End Point with Indicator
www.tutorsglobe.com offers substituted cyclohexane compounds homework help, substituted cyclohexane compounds assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
Theory and lecture notes of Repeated Games all along with the key concepts of repeated games, Fixed Repetitions, nd-game problem, Indefinite Repetitions, trigger strategy, Cartel Enforcement. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Repeated Games.
Superposition of Waves II tutorial all along with the key concepts of Coherent Sources, Interference of Waves from Two Slits, Intensity Distribution in Interference Pattern, Interference in Thin Films, Fraunhofer Diffraction by Single Slit
Heteropolysaccharides tutorial all along with the key concepts of Types of Heteropolysaccharides, Glycosaminoglycans, Agar and Carrageenan, Alginic acid, Galactomannan, Pectin, Xanthan Gum, Glucomannan and Inulin
1952320
Questions Asked
3689
Tutors
1495784
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!