Modelling and experimental research of fault‐tolerant dual‐channel brushless DC motor

Abstract

The brushless permanent magnet direct current (DC) machine with dual three‐phase windings is proposed for critical drive systems. It is proposed to call such a solution with a dual stator winding as a dual‐channel brushless permanent magnet DC motor (DCBLDC). The stator windings are supplied by two independent power converters under dual‐channel operation (DCO) mode. After a fault of one channel, a further operation of the machine can be continued in the so‐called single‐channel operation mode (SCO). In this study, a mathematical model of DCBLDC machine which takes into account non‐linearity of a magnetic circuit and all couplings between phases within a given channel as well as between channels is proposed. The results of experimental tests in static and dynamic states for SCO and DCO modes were presented.