Lee Rogers, Principal Engineer – Electrified Propulsion, at Drive System Design (DSD), outlines how powder metal gears can support EV production and how DSD’s work with industry-leading materials specialist Alvier has supported the development.

Manufacturers throughout the transport industry are aware that they now need to be placing significant investment in cheaper, cleaner, lower carbon technologies to support net-zero goals.

When considering our customers in the European Union (EU) in particular, we know that increasing legislation around lower carbon footprints is placing even more pressure on them to find sustainable electrification solutions.

What are we doing?

In collaboration with Alvier, specialists in advanced materials and production methods for sustainable high-volume applications, we are integrating powder metal gears into an automotive EDU demonstrator. This near-net-shape design eliminates a significant amount of material waste with a minimal difference in package/weight when compared to traditional forged gears.

These gears can be used in a range of vehicle sectors from automotive to off-highway and will enable significant cost savings at high enough volumes. The major reduction in CO₂ is also a major bonus as Electric Vehicle (EV) production volumes rapidly increase.

We’re not stopping there. We’re supporting our customers by providing guidance on how to implement the gears into their specific systems, to ensure their needs are met whether they’re manufacturing cars, trucks or tractors.

How did we do it?

Our partnership with Alvier enabled us to replace some traditionally manufactured gears in an EDU with a powder metal counterpart.

• Identifying the right candidate

Utilising Alvier’s experience in powder metallurgy, which is the process used to develop powder metal gears, we built an understanding of the manufacturing constraints that would apply in volume production. When combined with DSD’s transmission engineering expertise we were able to identify the right component candidates to be replaced with powder metal gears. This led to us identifying the gear wheels as good candidates.

• Understanding the material performance

The next step was to understand the differences in material properties. The strength and noise performance of the gears must be equal to or better than a traditional solution to be competitive. DSD performed modal characterisation of both forged and powder metal gears to understand their baseline differences in terms of frequency and damping.

Similarly, using Alvier’s understanding of the powder metal fatigue performance, DSD was able to size the gears to meet the required contact and bending safety factors.

• Predicting performance

Using the characterised material data we were able to simulate the NVH and strength performance of the gear design against the original requirements. We predicted that these would have similar performance to the existing forged gear wheels. This meant me were able to move onto the prototype stage with confidence that the gears would work successfully.

• Finding the break-even point

Before entering the production phase, we used our ePOP tool and costing experience to model the breakeven point of the powder metal gears against the existing forged gears, to understand what volumes would be economically successful.

What’s the result?

The collaborative effort with Alvier throughout the process means we now have the confidence to take this powder metal gear design into prototype hardware. The thorough understanding of the manufacturing constraints, material properties and resulting performance means DSD is primed to help OEMs and Tier suppliers integrate this new technology into their products successfully.

Why DSD?

Successfully integrating new technologies such as powder metal gears to achieve lower cost and carbon footprint requires a collaborative approach that involves both manufacturing and design expertise.

High-frequency abnormal noises continue to pose challenges to engineers when developing electric and hybrid vehicles.

Jordan Craven, our Senior Engineer, and Rob Hoffman, US Director of Development and Test, recently spoke to Automotive Testing, a key publication covering automotive evaluation, diving into the increased interactions caused by the complex electronic, electromagnetic and mechanical subsystems in highly integrated electrified powertrains.

Jordan discussed the importance of understanding noise, vibration and harshness (NVH) considerations and having effective simulation capabilities to identify issues before they emerge in prototype hardware. Rob shed light on the importance of having the right development and test methodologies in place to support the NVH development of modern powertrains.

You can read the whole article here: https://automotivetesting.mydigitalpublication.com/publication/?m=71151&i=816648&p=26&ver=html5

To speak to one of our experts on the topic, get in touch here

This year marks a significant milestone for Drive System Design (DSD) as we celebrate the 10th anniversary of our US business. A decade ago, we embarked on a journey to cultivate a community of exceptional engineers dedicated to inspiring and challenging the rapidly evolving mobility industry. 

Since our inception, DSD has experienced remarkable growth and success. Today, our teams in the US and UK comprise over 150 experts, united by a shared passion for engineering excellence and innovation. Together, we have forged a reputation for delivering cutting-edge solutions in electrified propulsion systems and associated technologies. 

As we reflect on the past decade, we are immensely grateful to our talented team whose dedication and expertise have been instrumental in shaping DSD into what it is today. Their commitment to excellence has propelled us forward, enabling us to establish ourselves as a trusted partner for automotive, off-highway, commercial vehicle, aerospace, and defence OEMs, Tier-1 suppliers, and industry research bodies worldwide. 

We pride ourselves on our turnkey capabilities and unmatched expertise and have built a team in the US that embodies that. We’ve grown to now be collaborating across a diverse array of sectors and become a trusted technical partner for many of our clients, without whom we wouldn’t be where we are today, and on the growth path we’re on for the future. 

As we commemorate this milestone, we extend a heartfelt thank you to our team, clients, and partners for their unwavering support and collaboration. After our acquisition by Hinduja Tech in 2022, our future holds even greater potential. Together, we look forward to the next decade and beyond, as we continue to drive innovation, shape the future of mobility, and redefine what’s possible in the world of engineering. 

Here’s to the next decade of excellence, achievement, and innovation at DSD! 

DSD’s Richard Dunne examines the significance of getting to net zero and the importance of looking beyond the automotive sector to achieve it. Though there is no one size fits all solution, Dunne reviews sector considerations, best practises and varying approaches to reach net zero.

Read more here: https://edition.pagesuite-professional.co.uk/html5/reader/production/default.aspx?pubname=&edid=19b89e15-67cb-4ca2-9d33-ff5945b497c4

Publication: Future Vehicle

Author: Richard Dunne

The defence sector is on the brink of a transformative journey as it integrates electrification and autonomous technologies. DSD’s Ben Chiswick dives into the immense potential to revolutionise warfare and defence with the help of this technology, the extensive possibilities for unmanned ground vehicle platforms and taking a whole-system approach to get there.

Read more here: https://www.intersecmag.co.uk/simulating-the-future/

Publication: Intersec

Author: Ben Chiswick

Noise, vibration and harshness (NVH) performance and optimization for EVs is currently a focus area for many in the industry. This article highlights NVH challenges due to the complex interactions between electric powertrain components as well as DSD’s motor modeling and simulation expertise to help better predict NVH performance and any potential issues.

Read more here: https://www.emobility-engineering.com/system-level-approach-to-nvh-models/

Publication: E-Mobility Engineering

Author: Nick Flaherty

In the hunt for sustainable, carbon neutral mobility, the world of electrification is brimming with possibilities. However, navigating uncharted territory can be challenging. This article reviews the need for a knowledgeable partner that excels in full-system integration, the advantage of simulations and the benefits of sustainable materials.

Read more here: https://ehv.mydigitalpublication.co.uk/july-2023?m=63184&i=797327&p=2&ver=html5

Publication: Electric & Hybrid Vehicle Technology International

Aviation companies are looking for alternative energy solutions, including electric engines that run on hydrogen. Lee Sykes, commercial director at DSD, weighs in on the potential for hydrogen applications and on how this fuel source could have a positive impact on cost.

Read more here: https://www.verdict.co.uk/zeroavia-promises-commercial-carbon-free-flights-within-two-years/

Publication: Verdict

Author: Simone Bateson

Drive System Design (DSD), a global specialist in the engineering and development of electrified propulsion and actuation systems, is projecting a significant increase in its off-highway work this year, from 5% in 2021 to 35%.

This growth is in line with DSD’s strategic priority to heighten its commitment to meeting the needs of the off-highway sector. In the third quarter of 2022 in Europe, the economic sectors responsible for most greenhouse gas emissions were manufacturing (23 %), electricity, gas supply (21 %), households and agriculture (both 14 %), followed by transportation and storage (13 %)*.

In-line with its expansion into the off-highway sector, DSD is making its debut at iVT Expo. iVT is a global showcase of the components, services and technologies that go into making the next generation of industrial vehicles and improving the associated development, manufacturing and testing processes.

At the Expo, held in Cologne, Germany (28 – 29 June), Elena Belenguer, Engineer at DSD will take to the stage to deliver a technical presentation discussing how cross platform strategies can improve efficiency when moving towards electrification for off-highway vehicles. The talk will give insight into existing electrification challenges within industry, in addition to DSD’s approach to de-risking, reducing cost and development time in electrified powertrain design. In addition, DSD experts will also be on stand 2056, to discuss the application of its propulsion and actuation expertise in the off-highway space.

Lee Sykes, Commercial Director at DSD, commented: “With the global off-highway electric vehicle market set to grow at a 14.1% CAGR from 2023 to 2030, DSD is proud to leverage its core strength in complex electrification engineering to serve the off-highway sector. With our unique combination of toolsets and expertise, we are committed to being at the forefront of addressing the sustainability challenge in the industry and enabling our customers to realise the benefits of embracing electrification.

“We are excited to make our debut at iVT Expo and showcase our expertise in heavy duty transmission design, motor and power electronics development as well as the critical control systems that bring these to life,  enabling us to provide electrified solutions to this sector.”

Transitioning to electrification opens up a lot of possibilities with many new design decisions to be made, including whether or not to replace fluid power system components. Jason Schneider, chief engineer of Electrified Powertrain at DSD, examines the impact of electrification on hydraulics and pneumatic components and explains key points to consider during the design process.

Read more here: https://www.powermotiontech.com/hydraulics/article/21266050/qa-design-considerations-for-electrification-and-fluid-power

Publication: Power & Motion

Author: Sara Jensen