Inverter and Battery Drive Cycle Efficiency Comparisons of Multilevel and Two-Level Traction Inverters for Battery Electric Vehicles
Paper in proceeding, 2021

This paper investigates the drive cycle performance of different multilevel and two-level inverters. For the multilevel inverters, a cascaded H-bridge (CHB), a modular multilevel series parallel (MMSP) and a battery modular multilevel management (BM3) inverter are considered. The inverter and battery efficiency during the WLTP-driving cycle are estimated based on loss models. The battery loss model is derived from an electrochemical impedance spectroscopy of a cylindrical 18650 Li-ion battery cell. The inverter losses are modeled using the semiconductors' data sheets and a thermal equivalent circuit. In comparison to the two-level inverter system, the CHB and the MMSP inverter drivetrains show an increased inverter efficiency, despite increased battery losses. In contrast to the CHB and the BM3 topologies, the MMSP inverter shows less battery losses. The BM3 inverter shows acceptable drive cycle efficiency while having the lowest inverter costs.

Conduction losses

Efficiency

Inverter

MOSFET

Battery

CHB

H-bridge

BEV

Switching losses

Cascaded

Electric vehicle

IGBT

BM3

Multilevel converter

Author

Nina Sorokina

Bundeswehr University Munich

Julian Estaller

Bundeswehr University Munich

Anton Kersten

Chalmers, Electrical Engineering, Electric Power Engineering

Johannes Buberger

Bundeswehr University Munich

Manuel Kuder

Bundeswehr University Munich

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering

Richard Eckerle

Bundeswehr University Munich

Thomas Weyh

Bundeswehr University Munich

21st IEEE International Conference on Environment and Electrical Engineering and 2021 5th IEEE Industrial and Commercial Power System Europe, EEEIC / I and CPS Europe 2021 - Proceedings


9781665436120 (ISBN)

21st IEEE International Conference on Environment and Electrical Engineering and 2021 5th IEEE Industrial and Commercial Power System Europe, EEEIC / I and CPS Europe 2021
Bari, Italy,

Loss and EMI reduction in electrified vehicle through the usage of a multilevel converter

Swedish Energy Agency (44807-1), 2017-07-01 -- 2021-12-31.

Subject Categories

Other Chemical Engineering

Other Civil Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/EEEIC/ICPSEurope51590.2021.9584705

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1/3/2024 9