Analytical Determination of Current Distributions in Shielded HV Cables and Ground Systems of Electric Automotive Power Trains

Murthy, Madhavi S.; Rasek, Guido A.

doi:10.1109/temc.2018.2837121

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…A system impedance model reproduces the effect of the other components in the HV system such as the battery or an auxiliary HV component (e.g., DCDC converter or HV heater), following the results of [16]. The HV system impedance was taken into account in the calculation as the concentrated DM parameter, Z HV .…”

Section: Analytical Modelmentioning

confidence: 99%

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Simulation of Shield Current in Automotive High Voltage Systems

Pazmany¹,

Fodor

Bäker³

2021

WEVJ

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In automotive high voltage (HV) systems, the switching operation of a power electronic converter causes current and voltage ripple in the frequency range of [10 Hz–150 kHz]. Automotive system engineering provides requirements that define the behaviour of HV components in that frequency range. Shielded HV cables must stand induced current in the frequency range of the ripple. One of the relevant requirements is the maximal current stress of the shielding. Several individually shielded cables are used in automotive HV systems, and these shields influence differential mode disturbance currents, such as the ripple current from the traction inverter. In this work, we provide a model and an analysis of shielded cables integrated into an automotive HV system in relation to system-level design parameters. To fill the gaps of existing research, we focused on two questions: How do design parameters influence the shield current value in the frequency range of the current ripple in a vehicle, and how should a shield and connector system be designed with respect to shield currents over the life-time? We applied analytical and simulative solutions to these problems through a co-simulation approach on the architecture of a real vehicle. The presented approach extends existing research by integrating simulations and vehicle measurements to life-time prediction. Moreover, the proposed methods enable the replacement of the state-of-the-art constant 10 A requirement to a driver profile based predicted shield current requirement on individually shielded HV cables in battery electric vehicles (BEV).

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Section: Analytical Modelmentioning

confidence: 99%

“…Voltage ripple issues are also covered by automotive standards, such as in [14]. Many researchers [1,6,10,[15][16][17][18] have examined the properties of shielding and shield current in automotive HV systems. They examined the AC cabling between the traction inverter and the electric machine, in the 3-phase AC system.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Shield Current in Automotive High Voltage Systems

Pazmany¹,

Fodor

Bäker³

2021

WEVJ

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“…Another consequence of these aggregated effects is that the distribution of the current density within the conductor is not uniform [1]. The change of the electrical parameters of the conductors with the frequency has a direct impact in the design of grounding and bonding systems [2], in the resonance analysis of long transmission cables in offshore wind farms [3], in the shielding of electric automotive power trains cables [4], in the calculation of rail impedances in traction power systems [5], in the analysis of over-voltages in This work was supported by the Spanish "Ministerio de Ciencia, Innovación y Universidades (MCIU)", the "Agencia Estatal de Investigación (AEI)" and the "Fondo Europeo de Desarrollo Regional (FEDER)" in the framework of the "Proyectos I+D+i -Retos Investigación 2018", project reference RTI2018-102175-B-I00 (MCIU/AEI/FEDER, UE). The authors are with the Institute for Energy Engineering, Universitat Politècnica de València, Valencia, Spain (e-mail: jmroman@die.upv.es, rupucpa@die.upv.es, asapena@die.upv.es, jorburva@die.upv.es, cartersa@etsii.upv.es, mpineda@die.upv.es, mriera@die.upv.es).…”

Section: Introductionmentioning

confidence: 99%

Fast Numerical Model of Power Busbar Conductors Through the FFT and the Convolution Theorem

Martínez-Román

Puche-Panadero²,

Sapena-Bañó

et al. 2022

IEEE Trans. Power Delivery

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Skin and proximity effects can cause a non-uniform current distribution in the electrical conductors used in alternating current (ac) busbar systems, which increases resistance, decreases internal inductance, and causes asymmetries in the electromagnetic fields and forces. As no explicit solution for the ac resistance or the ac internal inductance of a rectangular conductor has been found, numerical methods are needed to obtain the distribution of the currents inside the busbars. In this paper, a novel numerical approach, based on the fast Fourier transform (FFT) and the convolution theorem, is proposed to model the rectangular conductors of the busbar system, based on the subdivision of the conductor in filamentary subconductors. This technique is know to lead to a dense, huge inductance matrix, that must be multiplied by the current vector, which limits its practical application. The proposed method replaces this matrix-vector multiplication with a simple element-wise vector product in the spatial frequency domain. The FFT speed makes the proposed method very fast and easy to apply. This approach is theoretically explained and applied to an industrial busbar system.

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Influence of High‐Frequency Characteristics of Components on Leakage Current and Conducted EMI of Servo Motor Drive System

Zhou,

Huang,

Zhou

et al. 2024

Circuit Theory & Apps

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Leakage current and conducted electromagnetic interference (EMI) significantly impact the safe operation of servo motor drive systems (SMDSs). The impedance characteristics of the components in the circuit change considerably in the general frequency range studied for leakage current and conducted EMI. These variations at high frequency (HF) can result in conducted EMI and leakage current deviating from the expected results, necessitating further investigation. A method of impedance analysis is proposed in this paper, which can efficiently analyze the influence of HF characteristics of circuit components on leakage current and conducted EMI. The influences of Y‐capacitor capacitance value and cable length on conducted EMI and leakage current are analyzed specifically. According to the HF characteristics of the Y‐capacitor and the cable, it can be deduced that changes in leakage current and conducted EMI are associated with alterations in impedance characteristics. Finally, the accuracy of the theoretical analysis is verified by simulations and experiments.

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Analytical Determination of Current Distributions in Shielded HV Cables and Ground Systems of Electric Automotive Power Trains

Cited by 10 publications

References 4 publications

Simulation of Shield Current in Automotive High Voltage Systems

Simulation of Shield Current in Automotive High Voltage Systems

Fast Numerical Model of Power Busbar Conductors Through the FFT and the Convolution Theorem

Influence of High‐Frequency Characteristics of Components on Leakage Current and Conducted EMI of Servo Motor Drive System

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