A comparative study of permanent magnet and switched reluctance motors for high-performance fault-tolerant applications

Jack, A.G.; Mecrow, B.C.; Haylock, J.A.

doi:10.1109/28.511646

Cited by 338 publications

(76 citation statements)

References 4 publications

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“…Each of the six phases is wound around a single tooth. A separation tooth between the phases provides electrical, thermal and magnetic isolation, a requirement for fault tolerance [4]. The concentrated windings produce a very rich airgap field containing space harmonics of order 4±6n, n=0,1,2,3,…, where negative values rotate opposite to positive values.…”

Section: Considered Machinementioning

confidence: 99%

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Rotor losses in laminated magnets and an anisotropic carbon fiber sleeve

Geest

Wolmarans

Polinder

et al. 2012

6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

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High speed fault tolerant permanent magnet machines have strong asynchronous airgap harmonics, making them susceptible to rotor eddy-current losses. These losses can be reduced by using novel high resistivity materials like plastic bonded magnets and carbon fiber reinforced retaining sleeves. This paper examines by numerical studies the consequences for the losses of using these materials. The effect of laminating the magnets and the losses in the anisotropic sleeve are analysed with 3D simulations, using simplifications determined with 2D simulations. The anisotropic resistivity of the sleeve roughly doubles the losses compared to an isotropic sleeve, while laminating the magnets in n slices reduces the losses by 1/n 1.8 .

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Section: Considered Machinementioning

confidence: 99%

“…With proper modifications they can be made fault-tolerant, allowing the use in safetycritical applications such as airplanes as well [4]. Due to the high rotational speeds both air friction and electrical losses increase and because these machine are rather small, the loss density is potentially higher than in conventional speed machines.…”

Section: Introductionmentioning

confidence: 99%

Rotor losses in laminated magnets and an anisotropic carbon fiber sleeve

Geest

Wolmarans

Polinder

et al. 2012

6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

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show abstract

“…By employing excessive winding redundancy over three phases, the stator winding of the multiphase PM machine can keep on forming the circulating rotating magnetic field when a fault occurs in one or even more phases. By making use of neodymium-iron-boron (NdFeB) rotor PMs with high remanence, coercivity and energy product, the power density of the machine is superior to existing fault-tolerant alternating current (AC) machines such as switched reluctance motor, flux switching machine and doubly salient machines [4][5][6], which makes it prevalent in this field throughout the past years.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Novel 24-Slot/14-Pole Six-Phase Fault-Tolerant Modular Permanent-Magnet In-Wheel Motor for Electric Vehicles

Zheng

Lei

et al. 2013

Energies

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Abstract:In this paper, a six-phase fault-tolerant modular permanent magnet synchronous machine (PMSM) with a novel 24-slot/14-pole combination is proposed as a high-performance actuator for wheel-driving electric vehicle (EV) applications. Feasible slot/pole combinations of the fractional-slot concentrated winding six-phase PMSM are elicited and analyzed for scheme selection. The novel 24-slot/14-pole combination is derived from the analysis and suppression of the magnetomotive force (MMF) harmonics. By making use of alternate-teeth-wound concentrated winding configuration, two adjacent coils per phase and unequal teeth widths, the phase windings of the proposed machine is magnetically, thermally isolated, which offers potentials of modular design and fault tolerant capability. Taking advantage of the leakage component of winding inductance, 1.0 per unit short-circuit current is achieved endowing the machine with short-circuit proof capability. Optimal design of essential parameters aiming at low eddy current losses, high winding factor and short-circuit-proof ability are presented to pave the way for a high-quality system implementation.

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“…In the field of fault tolerant electrical machines two main research directions can be observed nowadays: one dealing with permanent magnet (PM) motors [4], [5] and the other one with fault tolerant switched reluctance machines (SRMs) [6]. Each variant has its advantages and drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Fault Tolerant Bio-Inspired System Controlled Modular Switched Reluctance Machine

et al. 2014

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Original scientific paperFault tolerance is an obligatory feature in safety critical applications (aeronautical, aerospace, medical and military applications, power plants, etc.), where loss of life, environmental disasters, equipment destructions or unplanned downtimes must be avoided. For such applications, a novel bio-inspired motion control system is proposed. All its three components (the switched reluctance machine, the power converter and the control system) are designed to be as fault tolerant as possible. This paper describes all these three fault tolerant components: the bio-inspired control system having self-healing capabilities, the power converter with an extra leg and the fault tolerant modular machine. The theoretical expectations and simulation results are validated by means of laboratory experiments.

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A comparative study of permanent magnet and switched reluctance motors for high-performance fault-tolerant applications

Cited by 338 publications

References 4 publications

Rotor losses in laminated magnets and an anisotropic carbon fiber sleeve

Rotor losses in laminated magnets and an anisotropic carbon fiber sleeve

Investigation of a Novel 24-Slot/14-Pole Six-Phase Fault-Tolerant Modular Permanent-Magnet In-Wheel Motor for Electric Vehicles

Fault Tolerant Bio-Inspired System Controlled Modular Switched Reluctance Machine

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