Stability of an Electric Vehicle with Permanent-Magnet In-Wheel Motors during Electrical Faults

Jonasson, Mats; Wallmark, Oskar

doi:10.3390/wevj1010100

Cited by 6 publications

(12 citation statements)

References 8 publications

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“…[15][16][17] A fault analysis was conducted in [18] to specify the severity of different faults in the electric driveline of an EV. Based on the results in [17][18][19][20][21], the following severe fault conditions were analysed, as these result in high changes in the torque characteristics: a three-phase balanced short circuit, an inverter shutdown, a single-transistor turn-on failure, 2 a current sensor misalignment and a controller fault.…”

Section: Fault Collection and Groupingmentioning

confidence: 99%

Fault classification method for the driving safety of electrified vehicles

Wanner

Drugge

Trigell

2014

Vehicle System Dynamics

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A fault classification method is proposed which has been applied to an electric vehicle. Potential faults in the different subsystems that can affect the vehicle directional stability were collected in a failure mode and effect analysis. Similar driveline faults were grouped together if they resembled each other with respect to their influence on the vehicle dynamic behaviour. The faults were physically modelled in a simulation environment before they were induced in a detailed vehicle model under normal driving conditions. A special focus was placed on faults in the driveline of electric vehicles employing in-wheel motors of the permanent magnet type. Several failures caused by mechanical and other faults were analysed as well. The fault classification method consists of a controllability ranking developed according to the functional safety standard ISO 26262. The controllability of a fault was determined with three parameters covering the influence of the longitudinal, lateral and yaw motion of the vehicle. The simulation results were analysed and the faults were classified according to their controllability using the proposed method. It was shown that the controllability decreased specifically with increasing lateral acceleration and increasing speed. The results for the electric driveline faults show that this trend cannot be generalised for all the faults, as the controllability deteriorated for some faults during manoeuvres with low lateral acceleration and low speed. The proposed method is generic and can be applied to various other types of road vehicles and faults.

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Section: Fault Collection and Groupingmentioning

confidence: 99%

Fault classification method for the driving safety of electrified vehicles

Wanner

Drugge

Trigell

2014

Vehicle System Dynamics

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“…As the optimization has no unique solution, typical constraints like minimizing the utilization of the tyre grip [40] or maximize energy-efficiency in HEV [49] has to be used for achieving reasonable results. The force allocation method was further developed for real-time application with different simplifications of the optimisation [50][51][52][53][54]. Other applicable control laws for the force allocation are e.g.…”

Section: Vehicle Motion Controlmentioning

confidence: 99%

Survey on Fault-Tolerant Vehicle Design

Wanner

Trigell

Drugge

et al. 2012

WEVJ

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Fault-tolerant vehicle design is an emerging inter-disciplinary research domain, which is of increased importance due to the electrification of automotive systems. The goal of fault-tolerant systems is to handle occuring faults under operational condition and enable the driver to get to a safe stop. This paper presents results from an extended survey on fault-tolerant vehicle design. It aims to provide a holistic view on the fault-tolerant aspects of a vehicular system. An overview of fault-tolerant systems in general and their design premises is given as well as the specific aspects related to automotive applications. The paper highlights recent and prospective development of vehicle motion control with integrated chassis control and passive and active fault-tolerant control. Also, fault detection and diagnosis methods are briefly described. The shift on control level of vehicles will be accompanied by basic structural changes within the network architecture. Control architecture as well as communication protocols and topologies are adapted to comply with the electrified automotive systems. Finally, the role of regulations and international standardization to enable fault-tolerant vehicle design is taken into consideration.

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“…A closed-loop path controller, further described in Jonasson and Wallmark (2006), is adopted to minimise the control error. The path controller outputs global force references,…”

Section: Closed-loop Vehicle Controlmentioning

confidence: 99%

“…By using the steady-state inverse tyre model applied in Jonasson and Wallmark (2006) together with the actual wheel geometry, the resulting reference steering angles ref ( ) i δ can be computed. However, the electrical faults under consideration will introduce a rapidly growing wheel torque.…”

Section: Constraintsmentioning

confidence: 99%

“…The in-wheel motors adopt parameters (verified experimentally) from an experimental permanent-magnet in-wheel motor of outer-rotor type. More detailed descriptions of the electric drivetrain can be found in Jonasson and Wallmark (2006) and . Figures 8(a)-(c) show a PLECS simulation of the electric drivetrain where the in-wheel motors are operating at a constant speed of 90 rad/s, which corresponds to approximately 105 km/h if a tyre radius of r w = 0.32 m is assumed and longitudinal tyre slip is ignored.…”

Section: Vehicle Response To An Inverter Shutdownmentioning

confidence: 99%

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Control of electric vehicles with autonomous corner modules: implementation aspects and fault handling

Jonasson

Wallmark

2008

IJVSMT

Self Cite

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In this paper, vehicle dynamics for electric vehicles equipped with in-wheel motors and individual steering actuators are studied adopting the principles of optimal tyre-force allocation. A simple method for describing the constraints owing to tyre and actuator limitations is described. The control architecture is evaluated by investigating its response to realistic fault conditions. The evaluation demonstrates that the control architecture's ability to ensure vehicle stability generally is good. However, during major faults and extreme driving situations, vehicle stability is not maintained unless the constraints in the optimisation process used for tyre-force allocation are adapted to the specific fault.

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Stability of an Electric Vehicle with Permanent-Magnet In-Wheel Motors during Electrical Faults

Cited by 6 publications

References 8 publications

Fault classification method for the driving safety of electrified vehicles

Fault classification method for the driving safety of electrified vehicles

Survey on Fault-Tolerant Vehicle Design

Control of electric vehicles with autonomous corner modules: implementation aspects and fault handling

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