Simulation Solutions for Electrification Conference 2020

JMAG欧州代理店POWERSYS主催でSimulation Solutions for Electrification Conference を開催します。
JMAGとPSIMをつかった事例を中心としたカンファレンスです。
会期は2020年10月05日(月)~16日(金)の2週間、オンライン開催となります。

電気、パワーエレクロトクスの専門家、開発者が一堂に介します。
欧州以外の国の方もご参加いただけます。ぜひご参加ください。

開催概要

主催 POWERSYS
日程 2020年10月05日(月)~16日(金)
会場 Virtual Edition (フランス)
URL https://events.powersys-solutions.com/2020-powersys-solutions-for-electrification-conference-virtual/  icon-external-link

プログラム

Day 1: Oct. 5

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Design

General

04:30 am 10:30 am 05:30 pm

Introduction

Vincent Capron, Powersys
05:00 am 11:00 am 06:00 pm

Development planning of JMAG

Dr. Takashi Yamada, JSOL Corporation

JMAG is constantly being worked on to achieve highly accurate and high-speed simulation. JSOL would like to share our progress from the past year including parallel solvers to accelerate speed as well as GUI improvements aiming for increased productivity of analysis workflow. Analysis technologies we are currently focusing on and our plans for incorporation will also be covered in this presentation. Design exploration is an important topic this year. This presentation will detail the present and future of JMAG.

06:00 am 12:00 pm 07:00 pm

Efficiency and loss calculation of Rail and E-mobility Traction Motors in JMAG

Shafigh Nategh & Stephan Kenzelmann, ABB (Sweden)

Electrification has now extended from Rail to Marine and Automotive industries. Additionally, electrified aerospace has shown the potential to be a trend in the near future. Different market segments however have different requirements leading to the need for the development of customized tools enabling traction motor designers to offer the best solutions to the customers. Automotive industry despite Rail and Marine has not yet come to standard traction motor designs. That is why different solutions and designs are being used by different OEMs. Maybe in future by more standardization of products, the demands on the tools will be flattened. But, in the meanwhile all the alternatives are on the table and this is the designer job to pick the most suitable topology and optimized design based on the specific customer requirements. Consequently, the need for tools providing a high level of customization has raised and it is expected to further increase at least in the near future. JMAG as a strong electromagnetic tool with a high level of flexibility as well as advanced built-in modules that can be used for detailed calculation of motor parameters and performances has the potential to be integrated in the design and optimization process of traction motor, especially for e-mobility applications. In this presentation, some of the key JMAG functions and their applicability together with some practical examples will be reviewed.

09:00 am 03:00 pm 10:00 pm

Enhanced calculation of the end-winding leakage inductance for high power density PMSM

Marco Silberberger, Robert Bosch

The powertrain-electrification is a substantial part of the global turnaround in mobility. Due to the requirement for reduced CO2 emissions, high efficiency traction electric machines are required. For traction motor applications, the hairpin winding technology with relatively large conductor cross section area is widely used to increase the power density and the efficiency of the machine. Compared to conventional stranded wire winding, the large cross section conductors allow a precise but complex 3D modelling of the machine geometry. Thus, an accurate estimation of the end-windings leakage inductance becomes possible, which is usually a challenging and error-prone task. In this presentation, a numerical method is shown, to calculate the end-winding leakage inductance by using simple 2D and complex 3D modelling. To emphasize the benefit and the precision of the method, a 100kW study case traction motor is analyzed and the results are compared with measurement results and state-of-the-art analytical approaches.

10:00 am 04:00 pm 11:00 pm

Investigation of Unbalanced Magnetic Force in Fractional-Slot PM Machines with Odd Number of Stator Slot

Yu Wang, Sheffield University

Fractional-slot permanent magnet (PM) machines with an odd number of stator slots are attractive candidates for industrial applications due to their high torque density and low torque ripple. However, the unbalanced magnetic force (UMF) is detrimental to the bearing and yields noise and vibration. This presentation determines the existence criterion of UMF on both open-circuit and on-load conditions by analysis of air gap field and magnetic force waves, together with FE validation. In addition, five machines with a given odd slot number of 9 but different pole numbers, i.e. 2, 4, 6, 8 and 10 are compared in terms of UMF so that the influence of slot/pole combination on UMF can be determined. The additive and cancelling effects between the radial and tangential stresses are finally revealed.

  

Day 2: Oct. 6

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Design

05:00 am 11:00 am 06:00 pm

Demo session JMAG V20

Juan Marcano, Powersys

During this session we will demonstrate the following new functionnalities of JMAG V20: APV, Dashboard, Coil Modelling and Efficiency maps

06:00 am 12:00 pm 07:00 pm

How to create a Geometry Template in JMAG using Python Scripting

Juan Marcano, Powersys

When creating an analysis model for an electrical device, there are times when the designer wants to create geometries with user-defined functions and convert them into templates for generalization. In JMAG, templates can be created using Python scripting and this process may be ease the further utilization of the parameters created for a further parametric analysis and optimization. This presentation will take you through the necessary steps to create in a simple way a template that can be used to generate a specific geometry. The process can be then applied to the desired model to create your own templates in the future.

09:00 am 03:00 pm 10:00 pm

PSIM Implementation of a Dynamic Model of Three-Phase Induction Motors

Danilo Camuglia, University of Catania

The main aim of this study is to present a dynamic model of three-phase induction motors based on the generalized theory of the electrical machines. In particular, the equivalent circuits of the motor are referred to an orthogonal alpha-beta stationary frame, leading to a significant reduction of the model complexity. In the proposed implementation, a Scott-T transformer connection is exploited to perform the Clarke reference frame transformation, and two simple equivalent circuits are realised to represent the electrical subsystem of the machine. A limited number of additional operations are necessary to extract all electrical and mechanical model quantities. The proposed modelling has been exploited in this study to analyze the start-up and some load transients of a grid connected-induction motor.

10:00 am 04:00 pm 11:00 pm

Additively Manufactured Copper Windings – Calculation Process, Optimization, Potential

Dr. Jakob Jung, TU Freiberg / Additive | Drives GmbH

The additive manufacturing of copper windings for electric machines opens new possibilities to improve torque density, power density, and efficiency. The process, also referred to as 3D-printing, enables new kinds of winding geometries, that cannot be manufactured conventionally. As part of the design process, the company Additive|Drives GmbH uses JMAG to create optimized winding geometries in terms of volume and losses. The calculation involves transient models for eddy current simulation. In this publication, the authors present two kinds of optimized windings: firstly, a single coil winding of a racing car motor, secondly a hairpin-winding for automotive application.

  

Day 3: Oct. 7

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Design

04:00 am 10:00 am 05:00 pm

Shape and topology optimization of PM machines for higher speed drives

Shashikiran HK, John Deere

The topic will discuss a framework utilizing integrated modeling approach to link electromagnetics and structural stability into optimization framework, to enhance know how of the design topology, its boundaries and acceptance.

05:00 am 11:00 am 06:00 pm

Single-Phase BLDC Claw-Pole Motor Design Improvements and Analyses

Stefan Leitner, TU Graz

The increasing performance requirements on automotive auxiliary drives have led to a paradigm shift in the design of sub-fractional horsepower brushless direct current (BLDC) motors. While minimum cost used to be the primary design criteria, thereby accepting sub-optimal motor behavior, their overall performance is gaining in importance. The large cogging torque and torque ripple of single-phase BLDC motors, which often lead to disturbing structure- and airborne noise, have become unacceptable in many applications. However, the implementation of cogging torque reduction measures typically involves additional fabrication steps, thus increasing the cost, which is a disqualifier for mass-produced low-cost applications.
This talk presents single-phase BLDC motor designs in which the cogging torque and, in turn, the output torque ripple can be reduced at no increase to the manufacturing cost.
On the basis of the claw-pole motor topology, consisting of a ring winding housed between two specially shaped deep-drawn steel sheet parts, various design improvements are proposed and analyzed in detail. Therefore, different numerical models are developed in JMAG and used to study phenomena such as cogging torque, back-EMF, magnetic forces, and iron losses. Subsequently, the simulation results are verified by experiments, notably by rheometer-based techniques.

06:00 am 12:00 am 07:00 pm

Agile electrical machine development for electric and hybrid electric aircraft

Zoltan Nadudvari, Rolls Royce

Electric and hybrid-electric aviation is a new and disruptive market. In the last 4 years many demonstrator projects showed high potential for the electrification of aircraft which can ensure a sustainable aviation industry in the future. From the electrical machine point of view this application requires high power density, compact size and high efficiency. To achieve the best system-to-weight ratio the other parameters of the components (e.g. Battery, power electronics) of the drive system must be considered as a design boundary for the electrical machine. To achieve a high-power density and high efficiency the thermal and structural behavior must be investigated, thus multi physics simulation (Digital Twin or simulation twin) is key for agile development.

09:00 am 03:00 pm 10:00 pm

Modeling, Analysis and Design of a Homopolar Machine for Aerospace and Transportation Applications

Giulia Simoni, University of Pisa

Homopolar machines are not much diffused but could represent an interesting alternative to synchronous machines thanks to the possibility to move the field winding to the stator while also simplifying its structure, thus reducing the combined thermal-mechanical stress on coils that represents the most frequent cause of failure in the rotor. This results particularly interesting for high-speed machines, which may achieve the high power density values nowadays sought especially for aerospace and transportation applications. Nevertheless, modeling homopolar machines is more challenging due to their multi-section structure with inherent 3D flux paths. This presentation describes a general analytical-numerical model suited for a mid-level magnetic analysis of a 2-sections homopolar machine and its validation via a 3D FE model developed using JMag.

10:00 am 04:00 pm 11:00 pm

Efficiency map generation considering Hysteresis and eddy current loss distributions

Ahmed Shoeb, Powersys

This paper presents techniques of electromagnetic field analysis to simulate the behavior of the electric machine during driving. By means of co-simulation of finite element analysis and control/ circuit simulation, it is possible to simulate current waveforms at driving. Loss models such as play model and 1D FEA methods can not only improve the accuracy but also help visualize inside phenomena such as minor loops and skin effect of the steel sheet lamination. Finally, those techniques are applied to generate efficiency maps and aid in the evaluation of the motor over the operating range.

  

Day 4: Oct. 8

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Design

Renewable Energy

04:00 am 10:00 am 05:00 pm

A Spline-based Freeform Shape Optimization Workflow

Mr Sebastian Schöps, Technical University of Darmstadt

This presentation deals with freeform shape optimization of electric machines using the spline-based isogeometric analysis. Isogeometric analysis is particularly well suited for shape optimization as it allows to easily modify the geometry without remeshing. The method is applied for example to a machine model minimizing the total harmonic distortion of the electromotive force as goal functional. The optimisation workflow is integrated in JMAG via geometry import and export.

05:00 am 11:00 am 06:00 pm

PSIM implementation for modelling the solar based Grid-fed converter

Prachi Arora, Luminous power technologies PVT Ltd

Grid-fed inverters are highly in demand in countries like India, where there is a major issue in demand and supply of electrical power, and where we have abundance of solar power in certain parts of the country. Designing the parameters of the Grid fed current requires a lot of iteration, since, a small deviation from the stable control point of operation may result in failure of hardware. P-SIM simulation has been done to develop the prototype and further commercialisation of the Grid-fed Inverter. Input power is from the Photovoltaic (PV) panels. A DC-DC converter using buck technology tracks the Maximum Power point (MPP) from the PV panel using Incremental conductance Method. The output of the DC-DC converter is a Battery, whose voltage is maintained at the float level. A transformer based Current Source Inverter (CSI) with MOSFET’s as switching elements has been designed. A closed loop current control model has been implemented. The reference current is decided by the power available from the solar and the mains voltage. Proportional Resonant (PR) controller using 2p2z control is used for determination of the duty of the inverter switches. The design parameters of the controller have been iterated to get the desired results. The same has been implemented in the hardware.

06:00 am 12:00 pm 07:00 pm

Simulations for the design of supercapacitor-based energy storage in large scientific facilities

Alessandro Lampasi, ENEA

Energy storage is key topic for sustainable development gaining more and more attention in research, industry and power grids. However, any available technology (batteries, fuel cells, flywheels and so on) can cover a limited part of the power-energy plane, known as Ragone Plot, and is characterized by some inherent drawbacks. Supercapacitors (also known as ultracapacitors, double layer capacitors, pseudocapacitors or electrochemical capacitors) are a relatively new class of devices characterized by high values for the specific capacitance, even orders of magnitudes higher than traditional capacitors. This allows using supercapacitors as effective energy storage systems offering a trade-off between the high specific energy of batteries and the high specific power of traditional capacitors, opening the way for new performances and applications.
One of the main problem in exploiting supercapacitors is the difficulty to define an accurate and comprehensive model of their behavior in the different situations. The presentation introduces the approaches and the parameters available to model circuits including supercapacitors. However, instead of presenting a general model and method, the problem is approached by a specific application: the calculation of the optimal size and configuration of an energy storage system for a complex load, as a required in a large experimental facility for the study of nuclear fusion reactions. The facility operations are based on power converters (H-bridge inverters) for arbitrary currents exceeding 30 kA and including energy recovery. The design optimization is performed by PSIM simulations including Renewable Energy module.

09:00 am 03:00 pm 10:00 pm

Experimental platform for the study of impact of rooftop PV system integration on distribution grid

llhem Slama-Belkhodja, Université de Tunis El Manar, ENIT

A flexible and modular experimental platform developped to strenghten training and research capacities in the field of photovoltaic (PV) residential systems is presented. It is to investigate the impact of rooftop PV on electrical distribution network such as voltage quality, power losses, but also some emerging solutions as smart hybrid solar inverter with batteries use. This platform is dedicated to engineering school students, since a very first level, and also to research level. In the first case, PSIM simulation software is used to emphasize basic phenomenon like bidirectionnel power exchange, ratio of generated and consumed active and reactive power, impact of non linear loads. For advanced level, design control for power converter is investigated with PSIM and PIL approach for PV inverter. For research level, energy management systems are under consideration, and also local and centralised storage. This last is investigated thanks to Power Hardware-In-the-Loop ( PHIL) approach with OPAL-RT environment, when the power converter design and model is performed with PSIM.

  

Day 5: Oct. 9

New York
(EST)
Paris
(CEST)
Japan
(JST)

Power Conversion

General

05:00 am 11:00 am 06:00 pm

Demo session JMAG V20

Ahmed Shoeb, Powersys

During this session we will demonstrate the following new functionnalities of JMAG V20: Multiphysics and Topology Optimization

06:00 am 12:00 pm 07:00 pm

POSTER SESSION

Yves Thiolière, Powersys

09:00 am 03:00 pm 10:00 pm

Development planning of PSIM

Hua Jin, Powersim

We are striving to make PSIM even easier to use and more efficient for power electronics and motor drive simulation and design. In this talk, we will present the PSIM development roadmap and several exciting new features that will be included in the upcoming releases. Among others, a new functionality will be added to help design EMI filters and address the challenging EMI problems. Also, to help transition seamlessly from motor design to motor drive simulation, a new link to JMAG-Express Online, a free online motor design software, and a new JMAG-RT link will be introduced. In addition, enhancement of the Motor Control Design Suite that makes it possible to design motor drive controllers in minutes will be described.

10:00 am 04:00 pm 11:00 pm

Switched-Capacitor Front-End Converter for Universal Power Factor Correction Applications

Yasser Nour, Technical University of Denmark

Circuits operating from the universal mains must operate with a wide range of input voltages, which limits their optimization abilities. A front-end is proposed to reduce the PFC circuit’s input voltage range and allow for additional optimization for the downstream circuitry. The proposed front-end stage is based on switched capacitor topology and operates in open-loop. The front-end circuit has negligible effect on the PFC circuit’s control scheme, which enables simple integration with pre-existing circuit designs. The effect on the system power factor is determined through circuit analysis and simulated via PSIM. A 50-W prototype intended for LED lighting applications is implemented to experimentally validate the proposed system architecture gains. The switched-capacitor converter by itself achieves a power factor of 0.99. A power factor of 0.98 is obtained with cascading the front-end switched-capacitor by a boost PFC converter designed for US mains and producing a stable 210-V output DC-Bus voltage.

  

Day 6: Oct. 12

New York
(EST)
Paris
(CEST)
Japan
(JST)

Power Conversion

05:00 am 11:00 am 06:00 pm

Efficiency and Voltage Gain of PFC Circuit Under Variation in Load and Frequency of Operation Using Wideband Gap Devices

Sooraj V, TATA ELXSI

The power factor correction (PFC) circuit comes with the function of AC to DC operation with boost factor. There are lot of significant predominant topologies are available in the literature. The circuit majorly comprises of high frequency switching semiconductor devices, inductor, DC capacitors. The use of wide band gap devices with high frequency operation under continuous conduction mode bring more size reduction as well as high power transfer efficiency. However, there is a limit in operating frequency due to the fundamental component merge with EMI operating limits. In this paper, 3.7 kW bridgeless totem pole power factor correction circuit is operated at 100 kHz. The fundamental circuit operation, control and limit in power handling capability is discussed here. The current ripple in input current and voltage ripple at load are decided through proper selection of circuit parameters. The change in no load and full load inductance are also affect the percentage of current ripple present at the input stage. A proper selection inductor is discussed in detail here. The efficiency and voltage gain is closely observed under variation in load and frequency changes. The other performance parameters such as total harmonic distortion (THD), power factor (PF) are also discussed in detail here. The notions regarding the PFC architecture is substantiated with the PSIM analysis. The simulation studies along with thermal module corroborates notions regarding the other performance indices.

06:00 am 12:00 pm 07:00 pm

High Voltage DC-DC converter for design and simulation for Microwave Device application

Ajeet Kumar Dhakar, CSIR-CEERI,PILANI

In this work main focus on the efficient magnetron power supply with isolated full-bridge LLC resonant converter for microwave application. The designed HV-Power supply contains a full-bridge switching inverter, an LLC transformer resonant tank and a diode capacitor full-wave voltage doubler. For the low-cost system an analog IC is used output voltage and LLC tank current are sensed for operation of this converter. The controller varies the switching frequency to regulate output current and achieve zero-voltage switching. Its output is 7.2kV voltage and 7.2kW power magnetron. The simulation, design and closed loop control analysis is done in PSIM software.

09:00 am 03:00 pm 10:00 pm

A Hybrid Multitrack-Sigma Converter with Integrated Transformer for Wide Input Voltage Regulation

Mingxiao Li, Technical University of Denmark

This work presents a hybrid multitrack converter with the capability of partial power regulation. This converter incorporates the merits of the Multitrack converter and Sigma converter. The input power is distributed and transferred by a DC transformer (DCX) and a two-stage circuit, whose front stage is a PWM converter to realize voltage regulation and the next stage works as DCX. The two DCXs are integrated into one transformer. The proposed converter realizes reduced device ratings, partial power regulation and integrated transformer. A 32-75V input, 5V, 20A output isolated dc-dc converter for data center applications is built to verify the effectiveness of the proposed circuit structure. The peak efficiency of 95.1% is achieved at 48V nominal input voltage with 190W/inch3 power density.

10:00 am 04:00 pm 11:00 pm

Power production: using Psim to design the excitation system and analyze its performance in the design phase

Etienne MORIETTE, Omexom

1) The first project is a backup power source in naval industry. It is composed of 2 subsystems: a diesel power generator and an electrical power conversion. Our main use of Psim on this subject concerns the development of the excitation of the continuous current convertor with Thyristor bridges. Psim allowed us to see whether it would be steady or not.
2) The second project is a laboratory for circuit breaker tests. The station is supposed to develop the currents necessary to certify the manufacturer’s products before sales. Here again we develop an excitation system with thyristor bridges specifically designed to this purpose. We developed a model to emulate the station and determine the maximum characteristics necessary to obtain the current.

  

Day 7: Oct. 13

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Design

Power Conversion

Product Updates

05:00 am 11:00 am 06:00 pm

POSTER SESSION

Didier Zefack, Powersys

06:00 am 12:00 pm 07:00 pm

Simulation of DAB in PSIM for academic demonstration

Sumantra Bhattacharya, ULM University

Dual Active Bridge topology offers advantages like soft-switching commutations, a decreased number of devices and high efficiency. The design is beneficial where power density, cost, weight, galvanic isolation, high voltage conversion ratio and reliability are critical factors, making it ideal for EV charging stations and energy storage applications. This presentation demonstrates design steps of a High-voltage DAB, intuitive control loop design and how it can be implemented in PSIM.

09:00 am 03:00 pm 10:00 pm

A Better Way to Design and Test Motor Drives for EV’s

Petar Gartner, Typhoon HIL

Automotive industry has widely accepted Model Based Design (MBD) for control software development; motivated by software’s safety critical nature and the need to comply with ISO 26262. The problem in the past was lack of ultra-high fidelity real-time Controller Hardware in the Loop (C-HIL) simulation of inverter and electric motor thus creating a gap in the workflow when evolving a model from Model in the Loop (MIL) and Software in the Loop (SIL) to C-HIL. In this talk we demonstrate Typhoon’s ultra-high fidelity motor drive Hardware in the Loop (HIL) simulation with seamless integration with JMAG FEA machine design software. We will show a typical workflow for design and testing of EV drivetrain starting with JMAG FEA motor design, followed by export of spatial-harmonic PMSM motor model from JMAG-RT into Typhoon HIL simulation environment, followed by controller Hardware in the Loop simulation in Typhoon HIL HIL404 simulator interfaced with a real Engine Controller Unite (ECU) in the loop. Furthermore, we will briefly describe HIL interface towards the test automation and test management software.

10:00 am 04:00 pm 11:00 pm

Asymmetrical secondary modulated AC-DC converter for three-phase PFC application

Denys Zinchenko, Tallinn Technical University

The electric vehicles (EV) market is constantly growing due to the decrease of battery power cost per watt and the manufacturing technology development. Thus, the reliable and high-efficient charge stations should be provided to satisfy the demand. Conventionally the charge station is a two-stage converter. The first stage is intended to convert energy from the AC grid and store it in the DC link capacitor with power factor correction (PFC) feature. The second stage is a DC-DC converter that provides galvanic insulation, required voltage and power levels for the EV battery charging. However, each stage has losses and the total efficiency of the system is low. The novel approach is to create nearly single-stage converter, which consists of conventional three-phase unfolder and two unipolar AC to DC converters. This presentation mainly focuses on the development of the current source asymmetrical secondary modulated AC-DC converter (ASMC) for three-phase application. This type of converters could provide a soft-switching feature and able to consume current, while the input voltage is equal to zero, which needed for PFC implementation. The control system was implemented using PSIM SimCoder and SmartCtrl. The presentation consists of the charge station scheme with waveforms explanations, the control system of the ASMC and the converter waveforms and efficiency measurement.

  

Day 8: Oct. 14

New York
(EST)
Paris
(CEST)
Japan
(JST)

Power Conversion

Multiphysics

Motor Drive

04:00 am 10:00 am 05:00 pm

A 30kw wireless power charging system for electric vehicles

Zariff Meira Gomes, VEDECOM

The dynamic wireless inductive charging technology can mitigate the cost of the charging infrastructure and electric vehicles, moreover increasing its efficiency. In this work, a 30 kW dynamic wireless charging system for electric vehicles is presented with an efficiency up to 86 %.

05:00 am 11:00 am 06:00 pm

Design and Analysis of SEMiX151GD066HD IGBT switching and Conduction Losses using PSIM

Dr V Indragandhi, Vellore Institute of Technology

This paper presented a PSIM simulation for calculating the loss in an IGBT used in Power Electronics. In the implementation process, the effect of switching loss, conduction loss, and junction temperature on the IGBT are taken into comprehensive consideration. The simple method used is to calculate the diode conduction loss, switching loss, total loss, efficiency, temperature difference and junction temperature. IGBT Module SEMiX151GD066HDs is added into PSIM’s device database and the simulation circuit is designed in PSIM platform to evaluate the performance characteristics of the device.

06:00 am 12:00 pm 07:00 pm

Design and optimization of the controller and creating efficiency maps in JMAG

Dr.-Ing. Saeid Saeidi, SOBEK Drives GmbH

The technical paper will investigate how the precision of JMAG can improve energy efficiency of the drive system including: the motor, power electronic and control algorithm. It is also tried to provide practical validations.
High power to weight ratio is the major advantage of PMSM motor drives. To maintain high power density at various operation points, the control parameters should be finely tailored with respect to the nonlinear electromagnetic behavior of the motor. Hence models being used to design the control system should contain all physic-based nonlinearities existing in the motor. The two following aspects are important so that such a model can be widely accepted by control engineers:
1. The model structure should be simple and easy verifiable through experimental tests
2. The model should be computationally efficient to ensure fast design iterations
The focus of the paper is on post processing models based on JMAG FEM simulation. Primarily we consider the possibilities JMAG offers to create the post processing models in JMAG environment and the simulation including the power electronic and control algorithm without third party tools. Afterwards we also investigate the interface, JMAG provides to build up the post processing models in Simulink.
Keywords: FEM Simulation, Post-Processing Models, PMSM, Spatial Harmonic Model, Sensorless Control, FOC

09:00 am 03:00 pm 10:00 pm

Invertek Motor Drive Power Stage Input Harmonics Improvement and Thermal Rise Optimization by Using PSIM Simulation Data

Xuefu Zhang & Liam Blewett, Invertek Drives

In motor drive power stage development and optimization, saturable-core models and thermal models are used in PSIM simulation for helping Invertek Project 21 (a five years project, started in 2020), in which new generation premium product range (Optidrive P3 based on https://www.invertekdrives.com/variable-frequency-drives/optidrive-p2/) will be developed. By using the saturable-core models in PSIM to model DC-link chokes and to optimize their overload performance, 10 different size DC-link chokes are designed and prototyped for eight Invertek frame sizes. The PSIM models are easy to use and help reduce DC-link choke prototyping and optimization time for the project. In addition, thermal models are used in PSIM in order to estimate power losses and thermal rise on MOSFET, IGBT and Thyristor modules. The models help achieve accurate data for comparing power module performance from different power module suppliers. Besides, by combining PSIM thermal simulation and Solidwork Flow Sim, it is convenient and fast to develop and optimize cooling system designs, including power module (or heat source) allocation, high density extrusion heatsink design and air cooling channel design. In the presentation, a general power stage investigation, development and optimization by using PSIM simulation data will be introduced. Benefit of using PSIM in order to reduce project development time will also be discussed. In addition, PSIM simulation data will be compared with Invertek R&D lab test data as case studies to demonstrate how PSIM simulation helps the project. Three case studies will be briefly presented and discussed including passive DC-link Choke design, active DC-link filter design and air cooling system design.

10:00 am 04:00 pm 11:00 pm

EDU development with virtual twin of testbed

Andrea Piccioni & Inigo Garcia de Madinabeitia, AVL Graz

The increasing demand for electrified solutions on the market increases the pressure on the development and testing teams in terms of timing. A fully integrated e-Drive is the direction of the market to improve NVH, efficiency, weight, packaging, and cost.
Testing utmost accuracy: the scope of this study is how to manage the need for additional measurements in an e-Drive testbed, without influencing the characteristics of the fully integrated drive unit. Furthermore, this study covers methodologies that support higher quality in the virtual development phase. The multi-objective and multi-domain optimization of the PI controller is shown in an example.

  

Day 9: Oct. 15

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Drive

Multiphysics

05:00 am 11:00 am 06:00 pm

The best coupling tools in MBD for motor drive simulations: JMAG & PSIM

Didier Zefack & Adrien Michel, Powersys

Today, Electric motors (eMotor) play a very important role into a wide range of applications from home appliance to automotive and aerospace industries. For the optimizations of functional behaviour, cost and performance of large and complex eMotor, it is necessary to verify and validate the operating of their drive & control systems by combining the uses of Model-Based Design (MBD) approaches with Multiscale Modelling/Simulations i.e. by making a coupling simulation between a 3D Finite Element Analysis (FEA) for detailed analysis of eMotor complex parts such as rotor, stator, magnet, …,and a 1D system analysis (System-level simulation) to design, integrate, and manage the entire drive & control systems over the eMotor life cycles.
This presentation will provide a way to achieve this by coupling an eMotor Drives stage with Realistic Machine Models using the simulation tools JMAG & PSIM.

06:00 am 12:00 pm 07:00 pm

Permanent Magnet based traction motor for electric 3 wheeler vehicle for Indian Roads

Partha Sarathi Roy, Drivz

Three wheeler vehicles have been very important for last mile connectivity in urban regions of India. Hitherto, diesel engines have been the preferred prime mover for these vehicles. With the advent of permanent magnet based motors, it is possible to get rid of the pollution in our roads with battery driven PM motors.
The article describes an approach to arrive at the required drive train specification and then goes on to design a PM motor and controller for a three wheeler battery electric vehicle. The design approach is discussed in details to arrive at a techno-commercially optimised solution.

09:00 am 03:00 pm 10:00 pm

Electric machine cooling analysis using a coupled Magnetic Field and Thermo-fluid software’s

Maxime Bommé & Didier Zefack, Hexagon & Powersys

Thermal management of an electric motor is crucial for its sustainability; Its efficiency & lifetime will strongly depend on it… We know that JMAG can determine with accuracy the heat source of a system: it’s joule losses. But it doesn’t give you an idea about the heat behavior. Integrating Joule losses as an input in a CFD simulation can help to anticipate, understand and reduce overheating issues. This conference will show you how easily scFLOW could improve your developments, using your JMAG results as inputs.

10:00 am 04:00 pm 11:00 pm

Thermal Equivalent Circuit Model of Multi-Die SiC Power Modules

Carmelo Barbagallo, University of Catania

The main aim of this work is to provide a straightforward tool for PSIM software able to modelize the thermal behavior of power module packages. The proposed circuit-based modeling approach takes into consideration the mutual thermal interaction among the dies, which plays a key role in the estimation of their working temperature. This modeling method features a compact and modular structure that can be easily tailored for different package configurations, maintaining limited complexity and computational burden. Last but not least, this thermal model includes both heating and cooling effects, thus allowing to evaluate thermal stresses even under pulse width modulated power devices. The thermal model consists of RC network structures, and it can be exploited to identify the thermal status of each die of the power module even operating at different load conditions and under faulty operation. The method has been applied to a SiC 3 phase inverter power module in which 1200V 350A SiC MOSFET high side and low side switches are formed with four parallel connected dies.

  

Day 10: Oct. 16

New York
(EST)
Paris
(CEST)
Japan
(JST)

Motor Drive

Multiphysics

05:00 am 11:00 am 06:00 pm

Dynamic control of Three-Phase Induction Motors with Scalar control at low speeds

Kaarthi C., VERSA DRIVES

The control scheme is based on the constant volts per frequency method with simple current feedback. Only the stator currents are required for compensating both stator resistance drop and slip frequency. The scheme proposed fully compensates for the voltage drop by changing the stator voltage and maintaining constant magnitude of flux, regardless of changes in frequency and load. The slip compensation, based on nonlinear torque – speed estimate, is also introduced to make the speed error to almost zero at all loads. The proposed method will control the speed accurately down to at least 2hz with load torques of 150% of rated value. The only machine parameter required is stator resistance.

06:00 am 12:00 pm 07:00 pm

Evaluation of Electric Machines in Basic Design Stage Using the Simulation Platform GT-SUITE

Michael Zagun, Gamma Technologies GmbH

This presentation shows a holistic approach for the simulation of an internal permanent magnet synchronous machine (IPMSM) within a Plug-in Hybrid Vehicle (PHEV) using the toolchain of ‘JMAGExpress Online’ and GT-SUITE. Two popular approaches, which are the map-based modeling approach (MBMA) and the electrical-equivalent modeling approach (EEMA) for electric machines, are opposed to discuss their applicability in the concept development phase of hybrid vehicles. Particular attention is given to the model definition of the electric machine, the supervisory control strategy of the PHEV and the subordinate field-oriented control strategy of the traction motor. Both approaches prove to be applicable in a virtual test environment, with the MBMA being superior for preliminary design and energy management related tasks and the EEMA being the basis for all subsequent electrical domain related tasks.

09:00 am 03:00 pm 10:00 pm

Thermal optimization of oil-cooled e-motors by Moving Particle Simulation

Michele Merelli & Didier Zefack, Enginsoft & Powersys

Particleworks, a 3D CFD software based on the meshless Moving Particle Simulation approach, is very suitable for free surface and spraying liquid flows. Being able to perform thermal calculation and predictions, Particleworks is increasingly used in the development and optimization of e-motors. Their working condition modelling is easily done in Particleworks, without any need of geometry simplification or mesh generation.
The developer, Prometech Software provides extensive coupling opportunities to integrate the CFD software with other multi-physics simulators.
During the presentation, the simulation interface of Particleworks and the key steps to couple Particleworks with JMAG will be discussed, showing how to move from the fluid solution to the e-motor temperature prediction.

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