. Electric railway journal . of thebrushes, but a certain component of the effect produced bythe current in this winding is in space-quadrature with theprimary field magnetism—the other component being indirect space-opposition therewith, and hence this windingmay be called the quadrature coil. On the basis of the above assumption the connection of aDeri repulsion motor with two brush axes in space-quadra-ture can be represented as shown in Fig. 2. Any flux pro-duced by the current in the quadrature winding will be intime-phase with the current in the transformer winding,and will produce accel
. Electric railway journal . of thebrushes, but a certain component of the effect produced bythe current in this winding is in space-quadrature with theprimary field magnetism—the other component being indirect space-opposition therewith, and hence this windingmay be called the quadrature coil. On the basis of the above assumption the connection of aDeri repulsion motor with two brush axes in space-quadra-ture can be represented as shown in Fig. 2. Any flux pro-duced by the current in the quadrature winding will be intime-phase with the current in the transformer winding,and will produce accelerating torque at the rotor. Thetime-place relation between the current in the transformerwinding and the flux in space-quadrature therewith will notbe altered by any motion of the rotor or change in itsspeed. Figures 3, 4 and 5 indicate three positions of the brushaxes and show the equivalent connections for the trans-former and quadrature windings on the motor. Withthe axes close together, the transformer opposing compo-. Fig. 6—New Single-Phase Repulsion Motor nent of the quadrature winding is large, so that the re-sultant transformer winding is small, even in comparisonwith the fairly small space-quadrature component of thequadrature winding. With a wider separation of theaxes the transformer winding produces a greater effectin comparison with the quadrature winding. Both when the axes are together and when they areseparated by 180 electrical space degrees the torque iszero. In the former case the transformer effect iszero, while in the latter case there is no quadrature effect. Under speed condition there are produced two ,which affect the value of the secondary current and there-fore alter the torque, which for each position of thebrushes varies directly with the square of the current inthe armature. One appears at the transformeraxis and the other at the quadrature axis; the former isproportional to the product of the speed and the quadratureflux, and t
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