TransactionsPublished under the care of the General Secretary and the Treasurer . Figs. 11 asd 12. Loop-Winding and Curbent Curve. From the field curve of the neutral zone, the potential curveresults, as shown before, by means of integiation. With load,there is superposed upon the no-load field the additional field. \. I / Fig 13. Field of Direct-Current Shunt Machine at No-Load. which arises when one passes from no load to full load. This fieldproceeds mainly from the armature current and passes between ARNOLD AXD LA COUR: COMMUTATION. 811 the poles approximately as indicated by the lines of
TransactionsPublished under the care of the General Secretary and the Treasurer . Figs. 11 asd 12. Loop-Winding and Curbent Curve. From the field curve of the neutral zone, the potential curveresults, as shown before, by means of integiation. With load,there is superposed upon the no-load field the additional field. \. I / Fig 13. Field of Direct-Current Shunt Machine at No-Load. which arises when one passes from no load to full load. This fieldproceeds mainly from the armature current and passes between ARNOLD AXD LA COUR: COMMUTATION. 811 the poles approximately as indicated by the lines of force of Fi^.14 A. The lines of force of this plan are replaced by thoseof Pig. 14 B, which run almost perpendicular to each other. Thendditional field with load is represented by the field curve //,Fig. 4. At the point X, between the pole-tips, the intensity ofthe additional field is B„ = _ {h^-h;) AS - \ AW^ , (r _ h,-\) AS + XZ 0 8 XY Where h^ signifies the distance of the middle of the brushes fromthe neutral zone of the armature field, and hy the distance of thepoint X from the middle point of the brushes. This neutral zone
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