Daimler will be using YASA for their motors in the upcoming AMG electric platform and Renault has partnered with WHYLOT to use axial flux motors in their hybrids starting in 2025.Īxial flux motors often have power densities above 6Kw/kg and still have good efficiencies. It implies a greater interest in axial motors for automotive applications. Mercedes has shown keen adoption with the investment and acquisition of YASA. Axial flux motors provide substantially more power while having a lower weight density.Īlthough used for many years in stationary applications such as elevators and agricultural machinery, over the past decade many developers have improved the technology to make electric motorcycles, airport containers, delivery trucks, electric vehicles, and even aircraft. Magnetic flux is parallel to the axis of rotation in an axial flux motor (compared to perpendicular in radial flux machines). Axial flux motors have many EV design advantages over their radial flux counterparts. One of the key emerging motor types is the Axial flux motor which is gaining momentum in the electric vehicle sector. It requires a wide speed range and high overload factor for automotive geared motors to meet the performance requirements of high torque at low speeds or uphill or low torque at low speeds. In addition, the EV motor must adapt to the frequent starting, stopping, climbing, accelerating, and decelerating conditions of the vehicle. High efficiency, lightweight, high power density, small size, reliability, and low cost are required for EV motors. Unlike other industrial motors, the transmission system of a vehicle electric motor must not only be affected by the structural size of the vehicle but also meet operating conditions under complex conditions. ![]() Innovations in enabling technologies like thermal management and power electronics are other drivers of motor innovations. Reduction in reliance on rare earth metals also drives electric motor innovations. ![]() New motor technologies to drive the FutureĬoncerning electric motors, the reduction of installation space, increasing power density, optimizing cooling concepts, and increasing controllability are key drivers for electric motor innovations. At the same time, the demand for electric motor parts and related materials is increasing.įutureBridge delves into the different trends/developments in the field of electric motors for electric vehicles. ![]() The rapid growth of the electric vehicle market has created significant demand for electric motors for different types of vehicles, including the commercial/passenger vehicle segments, in different parts of the world. Automotive OEMs are at the forefront of electric vehicles with the notion of sustainability. The electric motor (the heart of an electric vehicle), along with batteries and power electronics, is one of the key components of an electric vehicle’s powertrain. Tighter emission standards and improved batteries (in terms of lower cost and longer range) helped EVs gain traction. For efficiency, the magnetic gap needs to be really narrow and a bit of localalised board ripple could be a big issue.Electric vehicles (EVs) are a promising global strategy for decarbonizing the transportation sector. The one thing I still wonder about is how do they achieve damping the dynamic mechanical rippling of the PCB during winding switching, particularly in high torque situations. The description says they have magnets on both rotating discs but the diagram shows one magnet disc and one plain. Stator heating through I 2R losses is presumably tackled by keeping the R, and inductance, really low, together with radiation and the high speed airflow in the gap. This sounded mechanically 'difficult' but it looks as if they have overcome any mechanical implementation difficulties. ![]() Trying the same backplate approach on a PCB stator would have resulted in huge eddy current losses, I'd come to the conclusion that having the backplate 'pole disc' spinning with the magnet assembly, closely sandwiching the stator PCB, was the only way it could be done. In comparing against my (OT) printed rotor motor - which has a very thick steel 'pole disc' creating a very small high flux magnetic gap for the rotor to run in. Ah, that IEEE Spectrum article answers a lot of the questions I had about the PCB stator approach.
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