Modeling of Two-Phase Supply of Three-Phase Induction Motor

摘要

The paper concerns with design of mathematical and numerical model of three-phase induction machines that operate with one stator phase winding open. The remaining two phase windings are fed by voltages connected between terminals of these windings and the neutral. Sometimes this way of feeding is utilized after the failure of one of the branches of the feeding converter or some stator phase winding. The feeding converter is reconfigured so that the phase winding fed by the damaged branch is disconnected and the stator winding neutral is connected with the midpoint of bank of de-link capacitors The converter reconfiguration is motivated by the aim to maintain the drive system in operation. In this case a zero-sequence component of stator currents and consequently the third space harmonic of the current layer can arise. In order that higher space harmonics can be taken into consideration, the method of symmetrical components is employed to develop the mathematical model of the induction machine fed in the considered way. The correct function of the developed model has been verified by experimental measurements.