Feasibility Study of Fault Tolerant Blac Motor Using PM Enhanced Sensing

PM Enhanced Sensing of Internal EMF Variation-A Tool to Study PMBLDC/AC Motors

“…It has been pointed out earlier that the scheme is also suitable used in multi-phase brushless motors and fault tolerant BLDC/AC motors [23,24]. A typical schematic diagram for such motors is shown in Figure 21.…”

“…The details of the prototype are given in APPENDIX-A. Similar construction of outer stator and inner rotor with rotating shaft is possible as shown in Figure 9 [23,24].…”

“…The proposed scheme is an extension of Unnewehr [15] work, where instantaneous rotor position is determined using permanent magnet enhanced sensing of motor EMF variation. The EMF thus obtained is amplified using commercially available P-OPAMP for supplying power to torque producing windings [17,23,24].…”

“…As has been mentioned earlier, it is also suitable for fault-tolerant and multi-phase PMBL motors. The typical winding arrangement for fault-tolerant and multi-phase motors [23,24] is shown in Figure 12. However the disposition of PM also differs in both the schemes.…”