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.

Comparative Analysis of Fault-Tolerant Dual-Channel BLDC and SR Motors

“…In the case of the DCSRM, a change of the turn-on and dwell angle provides great possibilities. In the case of the DCBLDCM, one can also change the turn-on angle in order to increase the value of the generated electromagnetic torque [25]. Another way to achieve the same value of electromagnetic torque in SCO and DCO modes in this part of the characteristic is to use PWM control.…”

The Fault-Tolerant Quad-Channel Brushless Direct Current Motor

“…However, this solution requires more space and is heavier. Another group of solutions that has recently been developed consists of using only a one drive system using multi-channel [5][6][7][8] or multi-phase [9,10] machines. Such systems make it possible to reduce the mass of the motor and the space occupied by the drives while maintaining high reliability.…”

“…Electric machines used in high-reliability critical drives include induction machines [11][12][13], switched reluctance machines [8,14], permanent magnet synchronous machines (PMSM) [15][16][17], and brushless direct current machines with a permanent magnet (BLDCM) [7,18]. Unlike multi-phase solutions, multi-channels have clearly separated channels that are usually supplied by separate power supply sources [7,8]. In the case of multi-channel three-phase machines, each channel consists of three windings that are electrically separated from the windings of the other channels [15].…”

“…Laboratory tests conducted for one of the variants demonstrated that the TCO work mode is characterized by worse vibroacoustic parameters than the DCO A and C mode.Energies 2019, 12, 3667 2 of 21 (SRM) [8,14], permanent magnet synchronous machines (PMSM) [15][16][17], and brushless direct current machines with a permanent magnet (BLDCM) [7,18]. Unlike multi-phase solutions, multi-channels have clearly separated channels that are usually supplied by separate power supply sources [7,8].In the case of multi-channel three-phase machines, each channel consists of three windings that are electrically separated from the windings of the other channels [15]. In the case of multi-phase solutions, the occurrence of an emergency state caused by a break (e.g., in one of the phases) must lead to the occurrence of an asymmetric magnetic pull.…”

“…Energies 2019, 12, 3667 2 of 21 (SRM) [8,14], permanent magnet synchronous machines (PMSM) [15][16][17], and brushless direct current machines with a permanent magnet (BLDCM) [7,18]. Unlike multi-phase solutions, multi-channels have clearly separated channels that are usually supplied by separate power supply sources [7,8].…”