Fault Tolerant Design of Fractional Slot Winding Permanent Magnet Aerospace Actuator

Six Phase Permanent Magnet Machine with Fractional Slot Concentrated Winding

Permanent Magnet Machines (PMM) with a phase number (m) higher than three allow redundancy and lower torque ripple compared to their three phase counterparts. In this paper, a six phase permanent magnet machine with surface rotor magnets, designed with fractional slot tooth winding is proposed. A stator design with fractional slot tooth winding allows the design of a compact machine through sho...

Fractional Slot Permanent Magnet Synchronous Motors for Low Speed Applications

Design Guidelines for Fractional Slot Multi-Phase Modular Permanent Magnet Machines

This paper presents the design considerations for a fractional slot multi-phase modular permanent magnet (PM) machine with single-layer concentrated windings. The winding factors for various slot/pole number combinations are calculated to identify the optimal slot/pole number combinations for different phase numbers. In addition, the electromagnetic performance influenced by flux gaps (FGs), su...

Fault-Tolerant Voltage Source Inverter for Permanent Magnet Synchronous Motor

A two level fault tolerant voltage sourse inverter(VSI) for permanent magnetic drives is designed and tested. Generally a two level inverter consists of three legs. In this case an extra (redundant ) leg is added that replaces the fault leg. Extra leg is added by using by back to back connected thyristor this inverter works on both open circuit and short circuit fault. The main advantage is pos...

Winding Turn-to-Turn Faults Detection of Fault-Tolerant Permanent- Magnet Machines Based on a New Parametric Model

This paper proposes a parametric model for inter-turn fault detection in a faulttolerant permanent-magnet (FTPM) machine, which can predict the effect of the shortcircuit fault to various physical quantity of the machine. For different faulty operations, a new effective stator inter-turn fault detection method is proposed. Finally, simulations of vector-controlled FTPM machine drives are given ...