Partial Stray Inductance Modeling and Measuring of Asymmetrical Parallel Branches on the Bus-Bar of Electric Vehicles

In order to increase the power rating of electric vehicles, insulated gate bipolar translator (IGBT) modules with multiple power terminals are usually adopted. The transient current sharing of the same polarity power terminals is related to the stray inductance in the branches of the bus-bar. Based...

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Bibliographic Details
Published in:Energies (Basel) 2017-10, Vol.10 (10), p.1519
Main Authors: Geng, Chengfei, He, Fengyou, Zhang, Jingwei, Hu, Hongsheng
Format: Article
Language:English
Subjects:
asymmetrical branches
Bridges
Buses (vehicles)
Computer simulation
Control algorithms
Current sharing
Efficiency
Electric vehicles
Electrical measurement
Excitation
Induced voltage
Inductance
Investigations
laminated bus-bar
Magnetic fields
Methods
Noise
partial mutual inductance
partial self-inductance
Polarity
Transient current
Voltage
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Summary:In order to increase the power rating of electric vehicles, insulated gate bipolar translator (IGBT) modules with multiple power terminals are usually adopted. The transient current sharing of the same polarity power terminals is related to the stray inductance in the branches of the bus-bar. Based on the laminated bus-bar of a three-phase inverter in the electric vehicles that consists of asymmetrical parallel branches, this paper investigates the transient current imbalance sharing caused by the asymmetrical stray inductance in the parallel branches of the bus-bar from the view of energy storing and releasing of stray inductance for the first time. Besides, the partial self-inductance and mutual-inductance model of the parallel branches is set up. Finally, a high-precision partial stray inductance measurement method is proposed, and the accuracy of the partial stray inductance model for asymmetrical parallel branches is verified by experimental tests.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10101519