What is the main advantage of using short pitch winding in alternators?
Table of Contents
- 1 What is the main advantage of using short pitch winding in alternators?
- 2 How do you reduce the harmonics in the emf generated in an alternator?
- 3 Why short pitched armature winding is deliberately used?
- 4 How do you reduce the harmonics in the emf generated in an alternator Mcq?
- 5 What is alternator pitch?
What is the main advantage of using short pitch winding in alternators?
Short pitch winding improves the waveform of generated emf i.e. generated emf can be made to approximate to a sine wave more easily and the distorting harmonics can be reduced or totally eliminated.
How do you reduce the harmonics in the emf generated in an alternator?
The different ways to eliminate the harmonics from generated voltage are,
- Distribution of armature windings : Instead of having concentrated type of windings, they should be distributed in different slots.
- Chording :
- Fractional slot windings:
- Skewing:
- Large length of air gap:
Why are the coils of alternator stator winding are short pitched?
Advantages of Short Pitch Coils: So less copper is required. Hence economical. 2) Short pitching eliminates high frequency harmonics which distort the sinusoidal nature of e.m.f. Hence waveform of an induced e.m.f. is more sinusoidal due to short pitching.
Why short pitched armature winding is deliberately used?
Short pitched coils are deliberately used because of: Due to elimination of high frequency harmonics, eddy currents and hysteresis losses; which in turn increases the efficiency. They save copper if end connections, which is a big economic win. They improve the wave form of the generated EMF.
How do you reduce the harmonics in the emf generated in an alternator Mcq?
harmonics in the EMF generated in alternator can be reduced by
- A. skewing the slots.
- chamfering the salient pole tips.
- using distributed winding.
- all of the above.
How are the harmonics generated in an alternator and how are those suppressed or eliminated?
As a result, harmonic emf is always generated in the Alternator. These harmonics can however be eliminated / suppressed by the following methods: The distribution of armature winding along the air gap periphery tends to make the generated emf waveform sinusoidal.
What is alternator pitch?
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.