It is crucial for Power Electronics, Machines and Drives (PEMD) industries such as electrification, engineering and manufacturing to harness the value of collaborative partnerships in order to remain at the forefront of technology evolution, grow and deliver industry impact.
Advanced Electric Machines (AEM) and Tata Steel are using collaboration to improve the production and efficiency of electric vehicles (EV) components including motors and batteries, in response to global automotive market demand.
The UK aims to meet the target of all cars being zero emissions at the tailpipe by 2035, and no sales of new petrol and diesel cars and vans from 2030. With over 30 million electric traction motors needed per annum by 2030 to match the global automotive market demand, there is a need to accelerate the development of the manufacturing and production techniques used in electric vehicles of all kinds.
Both AEM and Tata Steel are taking advantage of the advanced facilities available to help play their parts in reaching these ambitions, through the Driving the Electric Revolution Industrialisation Centres (DER-IC) network of world-class PEMD design, manufacturing, and testing facilities.
The DER-IC funded “Coil to Core: Supply Chain for Net Zero CO2” (COCO2) project*, is part of the £80m Driving the Electric Revolution Challenge from UK Research and Innovation (UKRI). It brings together a network of open access facilities to develop a UK PEMD supply chain and will combine cost effective material supply and cold rolling of a new high strength non-magnetic steel with mass production process innovations that can deliver patented lamination designs.
Unique facilities at DER-IC North East are being used to support the collaboration between AEM and Tata steel through development of manufacturing, assembly and coating processes. By collaborating with, AEM is hoping to evolve manufacturing process routes and focus on assembly requirements to achieve and overcome the scale-up challenge that is faced with developing its new motors.
In the project the innovative materials and process developments will be applied to the core of a unique AEM electric machine design that will be free of rare earth magnets and copper, validated with prototype motor high speed dynamometer testing. Thereafter the core technologies of the project can be applied to other transport, energy and industrial sectors, providing automotive economies of scale.
AEM and Tata Steel are collaborating to focus on four improvements that are key to the future success of EV:
Faster
Expertise from Tata Steel has enabled the production of thin-gauge non-grain-oriented strip steels for electric traction motors. This technology results in higher efficiency in the motor and reduced energy lost. These power-dense motors run smoother and faster, and are far more thermally efficient, in comparison to their combustion engine counterparts. These motors avoid complex and expensive manufacturing methods meaning they are also far more accessible for the future of EV production.
Dr Yi Gao, Principal Engineer, Research & Development at Tata Steel UK commented: “Developing a design and using advanced steels allows us to create lower loss stators and higher speed rotors so the e-motor performance has higher power and more efficient but is within a smaller overall size. By teaming up the use of Tata Steel materials with the work of AEM and support from DER-IC, we will be able to develop and produce a product that is driven by future needs in terms of usage, capacity and sustainability. In addition, a successful conclusion of the collaborative project COCO2 will place Tata Steel in the middle of a supply chain for manufacturing advanced and sustainable EV e-machines.”
Further
Government statistics and RAC black box data reveals that the average UK journey is approximately 10 miles – meaning that the majority of electric cars could handle everyday travel without being plugged in and rechanged during the journey. Energy, and therefore vehicle range, is often lost in motors through energy leakage in the forms of heat and rotational drag. Ensuring that electric vehicles can achieve the same range and lifespan as a vehicle powered by a combustion engine (or better yet, achieve more) is vital for the future of electrification in the UK.
Through changing methods of control, AEM aims to create a motor which reduces the energy lost through the motor’s rotation. This will result in a far more energy efficient motor, and increased vehicle range.
Mike Woodcock, COO at AEM commented: “When we discuss the ideas of going further, our plan is to pack as much power and range into as small a package as possible. Our challenge is to develop something that will use every last electron to go as far as possible.”
Lower cost
As the future of transportation moves towards electric, one of the biggest challenges for the EV industry is the cost of production. To combat this, AEM has looked at the cost of materials that would typically be used to build a motor. The two most expensive are the copper used to make the motor windings, and rare earth magnets, so more cost-efficient alternatives have been introduced which work in the same way without relying on such costly materials. Another priority was simplifying production through avoiding complex, and therefore expensive, manufacturing methods.
Mike continued: “We needed a product that works and a cost-effective method of production, but we’ve gone one stage further. We are looking at how we can optimise the overall system. It’s not just about the motor itself, it’s the way that the motor interacts with the power electronics, with the battery and with the other ancillary systems like the cooling and so on. In essence, our aim isn’t just that consumers will pay less for the manufacture of the motor. It’s that the cost will be less for the overall architecture of the vehicle platform by using our motor.”
Greener
The aim is to develop a product that can reuse and recycle as much as possible, avoiding using rare earth metals and processes which release high levels of CO2 into the atmosphere.
DER-IC Chair, Professor Matt Boyle OBE, said: “We are undoubtedly entering into the age of electrification. When we discuss EV and the future of transportation we go far beyond electric cars. We are discussing aerospace, off-highway, micromobility and many other forms of transport. Although we are already making strides in terms of research and development of electrification across the UK, it is through these collaborative ventures that we can develop sustainable solutions to provide a realistic future for EV.
“Thinking not only about the production and use of the product but also its end of life is also vital for the future of electrification and EVs. Focussing on using materials that can be recycled to reduce waste has been another key factor in the collaboration between Tata Steel, AEM and DER-IC.”
Industries are, undoubtedly, seeing the value that collaboration can offer. Through sharing knowledge, technologies and skills, progress can be far more efficient – and, in this case, a very real opportunity created for EV to thrive. To generate significant change in a timely manner, it is crucial that industry experts are leading the way in collaboration, through sharing knowledge and facilities. For more information on Driving the Electric Revolution Industrialisation Centres and the open access facilities available visit www.der-ic.org.uk.
