Analysis of DC Current and Voltage Ripples of Electrical Drivetrains for HV Electrical System Emulation AVL SET GmbH

Format:

Book

Conference/Event

Author/Creator:

Merath, Stefan, author.

Contributor:

Reick, Benedikt

Winzer, Patrick

Conference Name:

17th International Conference on Engines and Vehicles (2025-09-14 : Capri, Italy)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

State-of-the-art testing of traction inverters is conducted using PHIL-based testbeds. These systems, which include a battery emulator and an e-motor emulator (EME), offer significant advantages over dynamometer testbeds in terms of test duration, reproducibility, parameterization and protection of the unit under test. In these advanced systems, the physical modeling of the AC side (e-motor) is highly detailed, accounting for factors such as iron saturation effects, current harmonics, and loss models. State-of-the-art DC side models are limited to a constant voltage and an internal resistance model, as outlined in [1], neglecting other components like additional traction inverters or DC/DC converters connected to the HV electrical system and their impact on voltage and current ripples high-frequency oscillations in the current that can arise from power electronic systems. This research project aims to address this gap by developing an HV electrical system emulator that considers these influences. This contribution explores the modeling of electric powertrains, focusing on the ripple currents impressed by traction inverters and DC/DC step-down converters and their propagation within the HV electrical system. Initially, the system approach of the HV electrical system emulator is outlined. The fundamental components of HV electrical systems containing various models, such as batteries, traction inverters and motors, are then discussed. Special attention is given to the modeling of ripple currents. Experimental studies based on simulations are presented to illustrate the ripple currents, the impressed frequency components, and their propagation within the HV electrical system of a selected example. The research also discusses strategies for mitigating ripple currents to protect electrical components. Finally, future trends in electric powertrains are examined, along with the next steps and upcoming work related to the emulation of the HV electrical system. The challenges that need to be addressed are also discussed

Notes:

Vendor supplied data

Publisher Number:

2025-24-0135

Access Restriction:

Restricted for use by site license