Thomas Bäuml

AIT Austrian Institute of Technology | ait · Center for Low-Emission Transport

The use of equivalent circuit models for simulating the operating behaviour of Lithium-Ion batteries is well established in the automotive and the renewable energy sector. However, finding the correct parameter set for these models is still a challenging task. This manuscript proposes a comprehensive methodology for estimating the required, tempera...

This chapter deals with the most important possibilities for improving the overall vehicle performance of electrified vehicles. Thus, it describes the results and the key messages of several IEA-IA-HEV-Task 17 workshops and studies, by focusing on the following topics: E-Motors: This section is focusing on the advantages and disadvantages of Perman...

Heating in winter can reduce the maximum driving range of electric vehicles by about 50%. Therefore, thermal management is currently a big issue in this sector. This contribution shows the development and implementation of an entire vehicle model which is capable of investigating novel concepts for increasing the maximum driving range of electric v...

The energy demand for conventionally heating the interior of a full electric vehicle can reduce the driving range by up to 50 %, if the energy is taken from the battery. Other heating concepts require complex additional heating equipment and can increase the weight of the vehicle significantly. This paper describes an energy efficient heating syste...

In full electric vehicles, the energy for heating the passenger compartment has to be taken, contrary to conventional vehicles, from other sources than the waste heat from the internal combustion engine. If the energy is taken from the traction battery, the driving range of the vehicle can in the worst case be reduced by up to 50 %. Other heating c...

Kurzfassung-Diese Arbeit beschäftigt sich mit der Entwicklung und Implementierung eines Alterungsmodells für Lithium-Ionen Batterien. Das Modell basiert auf der Arrhenius-Gleichung für die Alterung über der Zeit sowie auf einer Polynomfunktion welche die Alterung über den Zyklen abbildet und ermöglicht die Simulation des Alterungsverhaltens einer B...

In this work, a general simplified thermal model for totally enclosed variable speed radial machines is proposed. The parameters of the thermal model are calculated with simple equations based on the geometrical dimensions and material of the electrical machine. In this paper, the design procedure is described in detail and the obtained results are...

Conventional cars allow their users to decide about a journey’s modalities largely independent. Electric vehicles (EVs) also must ensure this to be a real substitute from the user’s point of view. This study focuses on range as a crucial technical feature of EVs. Many of the existing studies underestimate range requirements, as they are based on (i...

In this work the interactions of the cooling system with the electric drive components of a bat-tery electric bus are assessed by multi-physical domain simulation. A vehicle model with real drive cycle data is applied for the calculation of the torque and speed of the induction ma-chine. These results are then imported to an electro-thermal-mechani...

In this paper an accurate and fast thermal equivalent circuit (TEC) model of an interior permanent magnet synchronous machine (IPMSM) is presented. This model is capable of simulating transient thermal effects. The key parameters of the presented model are the heat transfer coefficients which consider heat transfer from the solid to the fluid regio...

Das Projekt Smart Electric Mobility (SEM) erarbeitet energietechnische und nutzerorientierte Herausforderungen und Chancen der Elektromobilität im Individualverkehr und entwickelt Lösungskonzepte dafür. Drei Themenfelder werden im Projekt SEM eng verknüpft bearbeitet.: 1) Das Nutzerverhalten sowie die Bedürfnisse hinsichtlich Akzeptanz und Kaufab...

This work deals with the development and prototyping process of an entire electric small range bus. The work includes also simulation, design, prototyping, evaluation, integration and realization with special emphasis on the electric powertrain. All components of the powertrain of the small range bus such as electrical machine, battery, power units...

The paper is about object-oriented modeling language; modelica standard library; dymola diagram layer; dymola text layer; expandable connectors; resistors; and multidisciplinary modeling.

This paper deals with a simulative approach for investigating the impact of inverter pulse inhibition during field weakening operation of permanent magnet synchronous machines and asynchronous induction machines. The modelling and simulation language Modelica is used to design models for the vehicle, the electric machine and the inverter in differe...

This work presents the prototype-development process of an entire electric small range bus including simulation, design, evaluation and prototyping with special emphasis on the electric power train. All components of the developed power train such as electrical machines, batteries, etc., were implemented and modeled in a simulation environment and...

This paper presents a comprehensive computa- tional fluid (CFD) model of a radial flux permanent mag- net synchronous machine with interior magnets. In the CFD model the water jacket cooling and a simplified model of the topology of the distributed stator winding are considered. The heat sources of the CFD model are determined from a finite element...

- Electric Vehicle - Modeling and Simulation - Parallel HEV - Overview - Series HEV - Overiview

This paper deals with the modelling of an electrical zero emission off-road motorcycle. The design and dimensioning of the electrical components was completely achieved by simulations. Libraries focused on automotive applications and developed at the Austrian Institute of Technology have been used to model the vehicle. All simulation models were de...

Multidisciplinary Modeling and Simulation with Modelica using Dymola

Modeling of an electric Vehicle

This paper presents how losses of electric machines are modeled as an extension of the Mode-lica.Electrical.Machines library. The theoretical background of the different loss models is elaborated and a Modelica implementation – the Ad-vancedMachines Library – is presented. Additional examples demonstrate the usage of the library.

SoundDuctFlow, a Modelica library for the joint calculation of acoustic and flow quantities in HVAC (Heating, Ventilation and Air Condition-ing) ducts is presented. Modeling the sound prop-agation in ducts by one dimensional acoustic two-port methods is a well-established technique for the acoustic characterization of large HVAC duct networks. Two...

A Modelica framework for the joint calculation of acoustic and flow quantities in HVAC ducts is presented. Modeling the sound propagation in ducts by one dimensional acoustic two-port methods is a well-established technique for the acoustic characterization of large HVAC duct networks. Two different approaches of acoustic modeling are implemented i...

The tutorial starts with an introduction to electric machines. This includes DC machines, asynchronous ma- chines and permanent magnet synchronous machines. Simple applications of starting and operating the ma- chines will be presented using the Machines package of the Modelica Standard Library. The limits of opera- tion of open loop and mains supp...

This work presents the modeling, simulation, realization and validation of an entire electrical two-wheel off-road motorbike in cooperation between arsenal research and KTM-Sportmotorcycle AG. All components of the motor-bike such as electrical machines, batteries, power train, etc., are implemented and modeled in the simulation environment Dymola,...

In the early design phase of large HVAC duct networks the joint calculation of the sound level and air flow rate and pressure loss as well as the prediction of the noise level in the passenger compartment gain more and more in importance. A unified framework for the one-dimensional flow acoustic simulation using Dymola/Modelica is introduced. The a...

A thermal model of a totally enclosed water-cooled induction machine is presented. The axially and radially discretized physical regions of the machine are modeled in the object-oriented language Modelica. Additionally, the water-cooling jacket is modeled. The parameters of the thermal network are derived from geometric, physical, and empirical dat...

Ever increasing oil prizes as well as climatic issues and constantly rising development costs force the automotive industry to adapt their automotive concepts and design processes to meet these strict requirements. Vehicle simulations can contribute to these issues and support the car manufacturer. Simulating new concepts in advance reduces the nee...

In this work the modeling, simulation and validation of an electrical two-wheel off-road motorbike is presented. All electrical motorbike components are developed in the simulation environment Dymola, using Modelica programming language. The power train concept of this electrical motorbike is based on a battery powered electric traction machine and...

In this paper different configurations of hybrid electric vehicles summarized in the SmartHybridElectricVe- hicles library were examined and simulated. The presented simulation models and results were created and achieved with Modelica using Dymola. The models represent different kinds of electric and hybrid electric vehicle configurations. Further...

This work deals with the mechanical and electrical modeling of different configurations of hybrid electric vehicles. The implemented simulation models and calculated results were performed with Modelica using Dymola. The implemented simulation models represent different types of hybrid electric vehicle configurations. Different concepts of operatin...

In this paper a comparison of two different modelled permanent magnet synchronous machines will be shown. A simulation of a vehicle concept with both models will be described and investigated by means of an advanced simulation tool - the SmartElectricDrives (SED) Library - and a Modelica/Dymola simulation environment. The SED library provides the m...

In this work a cooler of an internal combustion engine was modeled and evaluated. The model of the cooler was integrated in a simulation model of the entire vehicle. The cooler and the components of the vehicle were physically implemented in Modelica using Dymola. The developed models in Modelica were realized with time domain differential equation...

Thermal simulations are a very important tool for optimizing the design of electric machines. In this paper, two thermal simulation models for totally enclosed fan cooled (TEFC) induction machines are compared with thermal measurement results. For both one dimensional models of the induction machine a thermal equivalent circuit of the machine is pr...