Cumulative Connected Motor (Electric Motors)

4.7.2
It is typical practice to initially proportion the available field winding space to allow 80 percent for the shunt winding and 20 percent for the series winding. The ratio of series field ampere-turns to shunt field ampere-turns is chosen in the range of 15 to 30 percent. The full-load current is estimated. From this the wire sizes are chosen to keep the I2R less and current densities within reasonable limits. Select the no-load speed and calculate the necessary flux.