Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 166
greater self-induction of the ring-winding. To overcome this-greater self-induction during the interval of 54- Armature Reaction 151 short-circuit the ring-armature requires a stronger commutating field thanthe drum-armature. ■ If Bg represents the mean flux-density in the air-gap and B„ the… … Fig.ji36 The principal reluctance in the path of the cross ampere-turns is thatdue to the air-gap, and, neglecting the reluctance of the iron, we have fromequation (43) on page 61 ^.^^ ^^ Bc= —7 -, where Ig is double the air-gap in cm.Combining this with the equation 0-477 ■ Xg B„ = h we have for…
Electrical engineering
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