Fault Tolerant Electric Motor Drives Applied to Hybrid Electric Vehicle

Publicações

Power converter fault diagnosis in SRM drives based on the DC Bus current analysis

Publication . Gameiro, Natália S.; Cardoso, A. J. Marques

This paper presents a new fault diagnostic technique applied to switched reluctance motor (SRM) drives. A fault is detected when the measured amplitude of the DC bus current differs from its expected amplitude, assuming normal operating conditions. The information about phase currents amplitudes and the control states of all power switches permit to easily estimate the amplitude of the power converter supply current, since an asymmetric bridge converter is used. Open-and short-circuit fault occurrences in the converter power switches are presented. The proposed technique can early detect these fault occurrences and can also, in almost situations, identify not only the affected motor phase but also the faulty element. A short-circuit fault in a converter power switch of a SRM drive does not necessarily causes a short-circuit in the DC bus, unlike to what happens in many other converter-fed electrical machine drives. On the other hand, although a converter power switch open-circuit fault can be easily detected by the observation of the phase currents, the identification of the faulty element becomes impossible to achieve, if only phase currents are measured. This information is of paramount importance in the development of fault tolerant power converters.

2010-09Comunicação em conferência

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A new diagnostic technique for real-time diagnosis of power converter faults in switched reluctance motor drives

Publication . Marques, Jorge F.; Estima, Jorge O.; Gameiro, Natália S.; Cardoso, A. J. Marques

Accurate fault identification allows the adoption of procedures that minimize the fault impact on the machines operation. Switched reluctance motors (SRMs) have been recognized for their fault-tolerant capabilities and they present a very robust configuration, particularly due to the absence of windings or magnets in the rotor. All these attributes make the SRM a competitive solution for aircraft and automotive applications, where systems reliability is a crucial feature. Therefore, in this paper, a new algorithm for real-time diagnosis of power converter faults in SRM drives is proposed. In contrast to other methods that use additional sensors or devices, the presented technique uses the measured phase currents only, which are already available for the drive control. The proposed algorithm effectively detects the inverter faulty phase and is capable to localize the faulty power switch. Power switch open-and short-circuit fault occurrences in an asymmetric full-bridge converter are considered and analyzed.

2013-03Comunicação em conferência

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Palavras-chave

Fault Tolerance,Switched Reluctance Motor,Permanent Magnet Synchronous Motor,Hybrid Electric Vehicle, Engineering and technology ,Engineering and technology/Electrical engineering, electronic engineering, information engineering

Entidade financiadora

Fundação para a Ciência e a Tecnologia, I.P.

Programa de financiamento

Concurso para Projectos de I&D em todos os Domínios Científicos - 2008

Número da atribuição

PTDC/EEA-ELC/105282/2008