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In this paper the fault-tolerant brushless permanent magnet AC motor drive with redundancy is investigated. The motor modules are designed to provide both magnetic and electrical isolation between phases and the redundancy is achieved by using two motor modules connected on a common shaft. The effect of potential faults on the output torque and torque ripple factor are examined and the fault analysis...
In this paper a dual fault tolerant motor drive utilizing brushless permanent magnet AC motors is investigated for safety critical applications. The motor modules are designed to provide both magnetic and electrical isolation between the phases, and the use of two modules also offers redundancy. This paper addresses an important issue, torque ripple and torque compensation due to the loss of a phase...
Fault-tolerant motor drives are becoming more important in safety critical applications. Using a special motor design and an appropriate inverter topology, brushless permanent magnet AC motor drives can have a fault-tolerant capability. This paper considers a dual motor drive system on a common shaft to introduce redundancy. The paper provides a systematic classification for the potential electrical...
Although mechanical rotor position sensors are one of the least reliable parts in motor drives, past research in fault-tolerant PM drives has largely focused on motor and inverter topologies. While there has been substantial research on sensorless control algorithms, these are generally not directly applicable to the electrically isolated phase windings used in fault-tolerant PM drives. This paper...
This paper investigates the operating characteristics of two emerging magnetic materials, amorphous magnetic material and soft magnetic composite, and aims to address specifically the iron losses in inverter-driven high speed electric machines for automotive applications. In the paper, a three phase brushless axial field permanent magnet machine is considered due to its compact shape and its high...
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