IPM synchronous machine drive response to symmetrical and asymmetrical short circuit faults

Welchko, B.A.; Jahns, T.M.; Soong, Wen L.; Nagashima, J.M.

doi:10.1109/tec.2003.811746

Cited by 176 publications

(72 citation statements)

References 13 publications

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“…The output current and power versus output voltage loci can be obtained by solving the interior PM machine's steady-state equations for a variable resistive load [9], [12]. Assuming a lossless, magnetically linear model, it can be shown that when these curves are normalized to the machine's short-circuit current and open-circuit voltage, their shape is not affected by speed and depend only on the machine's saliency ratio (see Fig.…”

Section: A Alternator Characteristics With Resistive Loadmentioning

confidence: 99%

“…The high-power alternator requirement is also indicated. now be calculated using the approach given in [13] for inverter operation and in [9], [10], and [12] for inverterless operation.…”

Section: B Normalization Proceduresmentioning

confidence: 99%

“…For inverter operation, the maximum input torque corresponds to operation at the maximum torque per ampere point [13]. For inverterless operation, the maximum input torque can be found by differentiating the relation given in [12] relating the input torque to the value of load resistance. Fig.…”

Section: Optimal Interior Pm Machinesmentioning

confidence: 99%

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Inverterless High-Power Interior Permanent-Magnet Automotive Alternator

Soong

Ertugrul

2004

IEEE Trans. on Ind. Applicat.

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Abstract-This paper describes a high-power brushless interior permanent-magnet (PM) automotive alternator which does not use an inverter. The "inverterless" alternator is designed with a high back electromotive force voltage and high reactance, and acts as a constant current source over much of its wide constant power operating speed range. In this configuration, a switched-mode rectifier can be used to regulate the dc output voltage and current, which avoids the complexity and high cost of an inverter. An analysis of the modeling and performance of interior PM machines in this inverterless topology is described. Experimental results showing an outstanding constant power speed range are presented for a 6-kW concept demonstrator machine tested using a three-phase resistive load to simulate inverterless operation.

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Section: A Alternator Characteristics With Resistive Loadmentioning

confidence: 99%

“…The high-power alternator requirement is also indicated. now be calculated using the approach given in [13] for inverter operation and in [9], [10], and [12] for inverterless operation.…”

Section: B Normalization Proceduresmentioning

confidence: 99%

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Inverterless High-Power Interior Permanent-Magnet Automotive Alternator

Soong

Ertugrul

2004

IEEE Trans. on Ind. Applicat.

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“…Due to the constant excitation provided from the permanent magnets in the rotor, the fault characteristics of permanent magnet motors differ from those of conventional induction motors. [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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“…The steady-state UCG model is extended to take into account stator resistance and magnetic saturation and the model predictions are compared with experimental data taken from two IPM machines. A dynamic model [5] is used to predict transient waveforms and other transient effects present in the IPM machine during UCG operation.…”

Section: B Ucgmentioning

confidence: 99%

Uncontrolled generation in interior permanent magnet machines

Liaw¹,

Soong²,

Welchko³

et al.

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

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Abstract-The movement toward higher power automotive electrical systems has spurred research into low-cost alternators capable of operating over a wide constant-power speed range. A promising candidate for this application is a specially designed interior permanent-magnet (IPM) machine operating in uncontrolled generation (UCG). This paper investigates the modeling and performance of IPM machines in UCG. The concept of the voltage-current locus is introduced to explain the presence of hysteresis in the machine stator current and this effect is experimentally demonstrated. The effect of nonidealities such as magnetic saturation and stator resistance are also examined, to achieve a more accurate steady-state and dynamic modeling of the machine behavior. The predictions of these models are tested against experimental results.Index Terms-Interior permanent magnet (IPM), uncontrolled generation (UCG), voltage-current loci.

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IPM synchronous machine drive response to symmetrical and asymmetrical short circuit faults

Cited by 176 publications

References 13 publications

Inverterless High-Power Interior Permanent-Magnet Automotive Alternator

Inverterless High-Power Interior Permanent-Magnet Automotive Alternator

Fault classification method for the driving safety of electrified vehicles

Uncontrolled generation in interior permanent magnet machines

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