Cascading DC Machines to Obtain New Torque/Speed Characteristics and Save Energy in Their Applications

摘要

The representation of torque/speed characteristics of each type of DC machine has a fixed shape, but in industrial applications not all the required DC load torque/speed characteristics can be loaded by existing DC machines. To build a DC machine to fulfill each required torque/ speed characteristic is expensive, unreliable, and time-consuming. From this point of view, came the idea of coupling the shafts of DC machines in cascade. This article investigates the new characteristics obtained from different cascaded sets of DC machines. It compares the new characteristics of each cascaded set with the use of one DC machine that has the same rating in order to show the advantages of the process of cascading. The article proceeds to investigate the degree of success of this idea by applying it in DC machines used in mining, then investigating the energy saved.