Fault Diagnosis of Power Components in Electric Vehicles

Lin, Fei; Chau, K. T.; Liu, Chunhua

doi:10.4130/jaev.11.1659

Cited by 23 publications

(3 citation statements)

References 50 publications

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“…The electric damage in such systems is caused by the voltages induced from the inverters, which are needed to convert direct current into alternating current [4]. Additionally, a voltage difference between the driveshaft and the motor housing induces damaging mechanisms like discharges through the tribological contacts in the load zone of adjacent bearings [5,6]. The degree of harmfulness of bearing currents can be determined using the apparent bearing current density, which is the electric current passing through the bearing divided by the Hertzian contact area.…”

Section: Introductionmentioning

confidence: 99%

Pitting Influence on Electrical Capacitance in EHL Rolling Contacts

Zaiat,

Ibrahim,

Kirchner

2023

Lubricants

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This work presents an investigation on the influence of pitting in EHL rolling contact. The pitting geometry comes as an extension on the architecture for multi-physical numerical calculations of rolling element bearing contacts based on OpenFOAM. The model utilized is built according to the state-of-the-art for fluid–solid interaction and electro-quasi-static fields. In this framework, the contact is reduced to be two dimensional in order to reduce the computing costs needed. The changes in the electric properties, which are caused by pittings, are measured using the electric capacitance of the contact and put in perspective with regard to the EHL contacts geometry. The investigation delivers an evaluation on how surface degradation, in both the pitting width w and pitting depth d of the contact, affects the electric properties. It can be seen that the maximum deviations with different reduced radii for the same pitting structures are around 5% and would therefore hardly be distinguishable with corresponding measurements. By comparing the same data for the same ratio of pitting width to reduced radius, on the other hand, differences of up to 50% can be seen.

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Section: Introductionmentioning

confidence: 99%

Pitting Influence on Electrical Capacitance in EHL Rolling Contacts

Zaiat,

Ibrahim,

Kirchner

2023

Lubricants

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“…This increases the likeliness for currents appearing not only in motor bearings, but also in transmission bearings, especially in the case of insufficient isolation between motor and transmission [7,8]. Electric rolling bearing damages are responsible for a large amount of failures in e-drive systems [9,10]. Due to the new mobility concepts focusing on electric vehicles bearing faults caused by electric damages, these become more important within the scope of research [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Voltage-Induced Damage Progression on the Raceway Surfaces of Thrust Ball Bearings

et al. 2022

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In the course of the electrification of powertrains, rolling element bearings are increasingly subject to electrical damage. In contrast to mechanically generated pittings, voltage-induced surface damage is a continuous process. Though several approaches for the description of the damage state of a bearing are known, a generally accepted quantification for the bearing damage has not been established yet. This paper investigates surface properties, which can be used as a metric damage scale for the quantification of the electric bearing damage progression. For this purpose, the requirements for suitable surface properties are defined. Afterwards, thrust ball bearings are installed on a test rig, with constantly loaded mechanically and periodically damaged electrically in multiple phases. After each phase, the bearings are disassembled, the bearing surfaces are graded and measured for 45 different standardized surface properties. These properties are evaluated with the defined requirements. For the ones meeting the requirements, critical levels are presented, which allow for a quantified distinction between grey frosting and corrugation surfaces. These values are compared with measurements presented in the literature showing that the identified surface properties are suitable for the quantification of electrical bearing damages.

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“…Traditionally, when there is any short-circuit fault, the faulty phase can be disabled and remedied with the open-circuit fault-tolerant operation [27]- [29]. However, the conventional approach purposely boosting up the remaining healthy armature sets for torque compensations [30]- [32]. Hence, all the armature sets are required to design with the higher tolerant factors, resulting in the increased material costs.…”

Section: Introductionmentioning

confidence: 99%

A new fault-tolerant flux-reversal doubly-salient magnetless motor drive with four-phase topology

Lee

Chau

Liu

2015

IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society

Self Cite

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The proposed fault-tolerant flux-reversal doublysalient (FT-FRDS) magnetless motor drive consists of armature winding for driving and DC-field winding for field excitation. The purpose of this paper is to investigate two remedial strategies for fault-tolerant operations of the proposed motor drive under short-circuit faults. First, shortcircuit phase can be disabled and the short-circuit fault can then be regarded as the open-circuit fault. By reconstructing the healthy armature phases, the reduced torque can be remedied and this is known as the fault-tolerant brushless AC (FT-BLAC) operations. Second, short-circuit fault can also be remedied based on the DC-field regulation alone, and this is known as the fault-tolerant DC-field (FT-DC) operation. These two remedial operations are compared and verified by the finite-element-method (FEM).

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Fault Diagnosis of Power Components in Electric Vehicles

Abstract: Battery, power electronics and electric motor are the main components of electric vehicles (EVs

Cited by 23 publications

References 50 publications

Pitting Influence on Electrical Capacitance in EHL Rolling Contacts

Pitting Influence on Electrical Capacitance in EHL Rolling Contacts

Investigation of the Voltage-Induced Damage Progression on the Raceway Surfaces of Thrust Ball Bearings

A new fault-tolerant flux-reversal doubly-salient magnetless motor drive with four-phase topology

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