In an alternator short pitch coils are used
WebMar 24, 2024 · Alternators MCQ Quiz - Objective Question with React for Alternators - Download Free PDF WebAug 22, 2024 · Short pitched coils are deliberately used in an alternator, because: they improve the waveform of the generated EMF they save copper of end connections eddy …
In an alternator short pitch coils are used
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WebSHOW ANSWER. 22. If an alternator is operating at leading power factor, then it can he concluded that. (a) the alternator is under- excited. (b) the alternator is over-excited. (c) the torque angle of the alternator has negative value. (d) the residual magnetism of the poles is zero. SHOW ANSWER. 23. Web40. In an alternator, use of short pitch coil of 160° will indicate the absence of following harmonic. a) Third b) Fifth c) Seventh d) Ninth. Ans: (d) 41. The maximum current that can be supplied by an alternator depends on. a) Number of poles b) Speed of the exciter c) Exciter current d) Strength of the magnetic field. Ans: (d) 42.
WebWhen short pitch coils of 160 are used in an alternator, which harmonic component will not bepresent in the output emf ? ... An RL high-pass filter consists of a 470 ohm resistor and a 600 mH coil. The output is taken across the coil. The circuit\'s critical frequency is ... Metabolic interference is a term used to describe a method to ... WebOct 12, 2024 · Coil Pitch or Coil span It is the angular distance between two sides of a coil, measured in terms of armature slots. For example, if there are 36 slots and 4 poles, then the coil pitch is 36/4 = 9 slots. Coil span or …
WebJun 8, 2024 · For a coil, that is short-pitched by α electrical degrees, the resultant induced emf E R is the phasor sum of two voltages α electrical degrees. Pitch factor The formula … Web⇒ In an alternator short pitch coils are used to reduce the stray losses to reduce the size of the machine to provide accurate phase difference of 120 degree between each phase to reduce the harmonics in generated e.m.f. ⇒ Dirt accumulation in generators can cause all of the following except low power factor poor voltage regulation flashovers
WebWhen short pitch coils of 160 are used in an alternator, which harmonic component will not bepresent in the output emf ? ... An RL high-pass filter consists of a 470 ohm resistor and …
Webcoil. With a full-pitch coil, the emfs induced in the two coil sides are in phase with each other and the resultant emf is the arithmetic sum of individual emfs. However the waveform of … famous merry christmas quotesWebIn an alternator short pitch coils are used A. to reduce the stray losses B. to reduce the size of the machine C. to provide accurate phase difference of 1200 between each phase D. to … famous meryendaWebA six pole, three phase alternator has 72 slots and a coil span of 1 to 10, what is the pitch factor? a. 0. b. 0. c. 0. d. 0. Calculate the distribution factor for a 36 slot 4 pole three phase winding. a. 0. b. 0. c. 0. d. 0. A part of an alternator winding consists of six coils in series, each coil having an e.m. of 10 V (r.m.) induced in it. copper sweating kitWebMay 17, 2024 · In alternators fractional pitch coil are used to reduce the effect of (a) hunting. (b) harmonics. (c) armature reaction. (d) power factor. Answer ⇓ B 7. If the … copper swimsuit with stripesWebHowever, two sides of a coil are not always corresponding points under the adjacent poles and hence the coil has a span or pitch less than 180 degrees. This is known as a short pitch coil. The pitch factor, K c is the ratio of the voltage generated in the short pitch coil to the voltage generated in the full pitch coil. Since EMF generated in ... famous mervinsWebThe generated emf/phase will become half 79.In an alternator short pitch coils are used to reduce the harmonic in generated emf 80.An exciter is a nothing but a 60 degrees 81.In power generating stations ... pitch factor is the ratio of the emf of short pitch coil to full pitch coil 91.When a three-phase alternator supplies capacitive load, ... copper supplements to reverse grey hairhttp://www.electricalengineeringinfo.com/2016/12/armature-windings-in-alternator-and-types-of-armature-windings.html famous mesolithic art