Drive System Design’s presentation at SIA Powertrain conference to explain how combined modelling technique could enable faster review of concept designs


Leamington Spa, UK, 11th May 2018 – Powertrain engineering consultancy Drive System Design (DSD) will present a paper detailing a novel technique to improve the thermal modelling of e-machines at this month’s SIA Powertrain Conference in Rouen. The paper explains how credible results for heat transfer can be obtained in just one week, by using a combination of particle-based fluid modelling and steady state Finite Element (FE) thermal modelling. The novel approach, based on the Moving Particle Simulation (MPS) method, is the result of collaboration between Drive System Design and simulation based engineering science consultant, EnginSoft. It allows design iterations to be compared during the concept stage of a new e-machine, enabling enhanced optimisation for e-machines and integrated EV powertrains.

Established methods for fluid flow modelling, such as Computational Fluid Dynamics (CFD), take too long to provide results during the rapid iteration of a concept design, especially where bulk heat dissipation is a feature, such as an oil-cooled e-machine. In collaboration with EnginSoft, DSD has reduced the time by using Particleworks, an advanced software solution based on Moving Particle Simulation to generate a Heat Transfer Coefficient (HTC) map for the complex, multi-phase flow, then applied it to an FE model of the e-machine.

“It can take as little as a few days using modest computer hardware to simulate several seconds of real time data, compared to weeks if using finite volume CFD,” said Luca Martinelli, Design Engineer.By combining the performance benefits of MPS with appropriate modelling simplifications, it is possible to use this method as an iterative design tool, rather than just for final validation.”

The paper, jointly authored by DSD and EnginSoft, describes the growing importance of optimum e-machine cooling as power density increases and the e-machine is integrated into the powertrain. It then explains the thermal modelling approach and motor cooling strategy before presenting the results as predicted temperature maps for different coolant flow rates. It concludes with an assessment of the benefits and proposals for future work.

Entitled ‘Thermal Optimisation of e-drives Using Moving Particle Semi-implicit (MPS) Method’, the paper will be presented as part of the Powertrain Efficiency Improvement session at 15:30 on 16th May, the first day of the conference.

About DSD

Drive System Design (DSD) is an award winning engineering consultancy specialising in the engineering, development, test and control of electrified and conventional driveline systems.

The company’s staff have experience working with vehicle manufacturers and Tier 1s around the world, designing new technologies and solving problems to make their products more competitive. They have the engineering, test, analysis and project management skills necessary to deliver projects to demanding timescales. Working closely with its customers through technical centres in Europe and North America, DSD is recognised as a world leading expert in driveline refinement, efficiency improvement and hybrid and electric vehicle transmissions. DSD is ISO 9001 and ISO 14001 certified.


About EnginSoft

A pioneering European company active since the late ‘70s, EnginSoft is a key player in Computer-Aided Engineering (CAE) and intelligent Digital Prototyping (iDP) today helping over 200 Fortune 500 companies become more competitive in their market place.

EnginSoft UK Ltd are dedicated to help the UK Manufacturing Industry to develop a competitive edge through innovative product design and lean manufacturing processes. Our wealth of expertise has allowed us to grow as trusted partners of leading CAE software and provide complete solutions which in turn enables our clients to deliver products with the optimal balance between performance, reliability and costs. EnginSoft UK Ltd is the UK distributor for Particleworks, developed by Prometech Software Inc.

Press Contact

Richard Doherty at Market Engineering

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“It can take as little as a few days using modest computer hardware to simulate several seconds of real time data, compared to weeks if using finite volume CFD,” said Luca Martinelli, Design Engineer.