Pitch factor.pdf
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Short pitching is needed to reduce harmonics by choosing chord angles that eliminate harmonics. It also reduces leakage reactance by limiting overhang conductor. The derivation shows the third harmonic factor Kp is zero when the chording angle is 60 degrees.
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Pitch factor.pdf
- 1. Why do we need short pitching? To reduce the harmonics. For example by choosing chording angle to we can kill eliminate harmonic. Like so To reduce leakage reactance due to overhang conductor. Derivation 60 0 3 rd Kp = cos α 2 Kp = cos 3 × 60 2 ⟹ 0