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 isomerism assignment help-homework help by online coordination compounds tutors
Approach Art after 1945 Assignment Help from a team of academic pros and secure your academic future with top-class grades!
theory and lecture notes of case for non-determinism all along with the key concepts of case for non-determinism, finite automata and regular languages. tutorsglobe offers homework help, assignment help and tutor’s assistance on case for non-determinism.
Reserves are profits and gains that a company has made and that still form part of the equity of shareholders.
in second-generation language or assembly language, instructions are written with mnemonics to make simpler the program.
www.tutorsglobe.com offers Declarative Language homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
Soil Taxonomy tutorial all along with the key concepts of Bases of Soil Classification, Diagnostic Surface Horizons, Subsurface Horizons, Classification Based on Soil Moisture Regime, Classification Based on Soil Temperature Regime
Avail quality-driven and cost-effective Project Management Essay Writing Assignment Help service to score A++ with ease!
Nature and Chemistry of Transition Elements tutorial all along with the key concepts of Electronic Configuration of transition elements, General Characteristics of Transition Elements and Periodic trends in properties
www.tutorsglobe.com assignment help tutorials : the phases of operation research - or are defining the problem and collecting data, creating a mathematical model, obtaining solutions from the model, checking the model.
www.tutorsglobe.com offers Operations or Methods homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
tutorsglobe.com streptococcus pyogenes assignment help-homework help by online medical bacteriology tutors
Infrared radiation is abbreviated as IR radiation is electromagnetic radiation with a wavelength among 0.7 and 300 micrometers, that equates to a frequency range among about 1 and 430 THz.
tutorsglobe.com roots modified for vital functions assignment help-homework help by online modifications of adventitious roots tutors
Nervous System tutorial all along with the key concepts of Structure of Nervous system, Functions of Nervous system, Neurons and synapses, Neural circuits and system, Anatomy in vertebrates, Comparative anatomy and evolution
1963640
Questions Asked
3689
Tutors
1478552
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!