Transient behaviour of a current-source inverter-fed synchronous motor with a solid rotor

A calculation method is presented which allows the transient behavior of a 2×three-phase current-source inverter-fed synchronous motor to be investigated, taking into account the eddy currents arising in the solid rotor iron. The set of equations for the synchronous machine is derived on the basis of a two-dimensional numerical field calculation and system-theoretical expressions. The theory is converted into a digital simulation program, also incorporating the regulation for constant buffer-circuit current and constant machine flux. The results of simulation computations show the characteristic shapes of currents, voltages, and torque. A comparison between measurement and computation shows good agreement