POTENTIAL OF A TWO MOTOR CONCEPT FOR ELECTRIC VEHICLES WITH RESPECT - - PowerPoint PPT Presentation

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POTENTIAL OF A TWO MOTOR CONCEPT FOR ELECTRIC VEHICLES WITH RESPECT - - PowerPoint PPT Presentation

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POTENTIAL OF A TWO MOTOR CONCEPT FOR ELECTRIC VEHICLES WITH RESPECT TO ITS INTERACTION WITH THE AIR CONDITIONING UNIT SEBASTIAN SIGLE DR. MICHAEL SCHIER - 03.10.2019 - Contents 1. Introduction 2. Modelling 3. Operation scenarios 4.

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SLIDE 1

POTENTIAL OF A TWO MOTOR CONCEPT FOR ELECTRIC VEHICLES WITH RESPECT TO ITS INTERACTION WITH THE AIR CONDITIONING UNIT

SEBASTIAN SIGLE

  • DR. MICHAEL SCHIER
  • 03.10.2019 -
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SLIDE 2

Contents

  • 1. Introduction
  • 2. Modelling
  • 3. Operation scenarios
  • 4. Results
  • 5. Conclusions
  • 6. Question and Discussion

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SLIDE 3

Introduction

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Two In One Motor (TIOM)

Integration of two electric engines in one compact device

  • traction motor: EM I (50 kW)
  • motor climatic compressor: EM II (10 kW)

EM I EM II clutch

Visualisation without windings

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SLIDE 4

Modelling

EV2019 www.evshow.ro

  • peration

strategy AC system

Vehicle/ driving cycle

EM I PSM 50 kW EM II PSM 10 kW

  • peration

modes select

vehicle parameter value mass 1600 kg front area 2.18 m² drag coefficient 0.29 rolling resistance coefficient 0.015 AC parameter value refrigerant R134a high pressurre 17 bar low pressure 3 bar ambient temp. 30 °C ambient humidity 60 %

power distribution

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SLIDE 5

Modelling

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vehicle model model of the AC circuit

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SLIDE 6

Operation scenarios

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Stuttgart-Lampoldshausen regional (96,140 m) Lampoldshausen-Stuttgart motorway (81,769 m) NEDC (11,013 m) WLTC class 3b (23,266 m)

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SLIDE 7

Operation scenarios

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Operation modes „EMI + AC“

  • EMI active / EMII inactive
  • clutch I closed / clutch II closed
  • Traction /AC from EMI

„EMII + AC“

  • EMI inactive / EMII active
  • clutch I closed / clutch II closed
  • Traction /AC from EMII

„Boost+AC“

  • EMI inactive / EMII active
  • clutch I closed / clutch II closed
  • Traction /AC from EMI and EMII
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SLIDE 8

Operation scenarios

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Operation modes (2) „SplitAC“

  • EMI active / EMII active
  • clutch I opened/ clutch II closed
  • Traction from EMI
  • AC from EMII

„Off + AC“

  • EMI inactive / EMII active
  • clutch I opened/ clutch II closed
  • AC from EMII
  • vehicle at standstill
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SLIDE 9

Results

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Share of the operation modes

  • peration points in

ST-LA regional cycle blue: EMI red: EMII

95 km/h 14 km/h drivetrain Drive Cycles NEDC WLTC 3b ST-LA regional LA-ST motorway conventional [kWh/100km] 18.21 18.17 15.81 21.54 TIOM [kWh/100km] 17.89 17.84 15.46 21.49 reduction [%] 1.75 1.81 2.22 0.25

energy consumption

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SLIDE 10

Conclusions and Outlook

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  • The TIOM drivetrain yields a energy reduction of 2.2% compared to a

conventional BEV drivetrain

  • The potential could be enhanced when using another compressor
  • The highest energy reduction potential is expected in urban an regional

driving cycles

  • The simulation model is working. Characteristic diagrams of other electric

engines could be included.

  • The characteristic diagrams of EM I and EM2 will be replaced by using the

measured data from the test lab

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SLIDE 11

THANK YOU FOR YOUR ATTENDANCE! QUESTION AND DISCUSSION

Dipl.-Ing. Sebastian Sigle Institute of Vehicle Concepts Sebastian.Sigle@dlr.de