Transient behaviour of a group of induction motors

The non-linear differential equations describing the transient behaviour of a group of induction motors are developed from the equations for a single machine. These equations enable the behaviour of each machine in the group to be investigated, either when the complete group is connected to a stiff supply or when the supply is weak and the machine behaviour is interactive. A numerical solution of the equations using a digital computer is used to predict the transient currents and torques of a 0.75 kW/1.5 kW motor group and of a 0.75 kW/1.5 kW/2.25 kW motor group, and the results obtained are compared with experimentally obtained results. [Continues.