Rimac - Model E-Axles -High-performance Propulsion Systems
High-performance propulsion systems with high efficiency, extreme power and torque output in a compact, low weight package. E-Axles. Our exceptionally powerful powertrain systems push the boundaries of what's possible in the field of power density, delivery and torque output. Beyond that, they are all built to be scalable - providing a flexible solution in a wide range of applications. Our range of high-performance drivetrain solutions have an exceptionally high power to weight ratio. Designed and engineered in-house, our drivetrains have been built to meet the meet the most extreme performance specifications, just like our latest hypercar, Rimac Nevera. Designed in a compact package, each solution comprises of two highly efficient motors coupled to a bespoke gearbox and double inverter to give best-in-class performance.
Motor Technology
Motors are a key factor in the delivery of power and torque from the powertrain. This is why for the development of our bespoke e-axles, our engineers dedicate a great deal of effort to detailing motor topologies, understanding and pushing the boundaries of internal and surface permanent magnet technologies, and finding ways to achieve the best power and torque density, while simultaneously achieving high efficiency and scalability.
Gearbox Technology
We develop our gearboxes so that they are capable of being implemented into both single-motor and dual-motor e-axles. They are packaged as either single or two-stage epicyclic transmissions for improved integration. Along with this, we also focus on other capabilities, such as parking brake integration, integration with a differential, and torque vectoring integration.
Inverter Technology
For our inverters, we are exploring all possible technologies to make the most efficient solutions, including IGBT, SiC, and GaN technologies. Our inverters are a crucial part of our e-axles, which is why we make sure they all offer high switching frequency, high packaging density and module parallelization. We also work hard to implement custom-made cooling with a large heat transfer ratio, achieved thanks to our in-house CFD and FEM simulations and verification.
Scalability
One key aspect which we focus on for our e-axles is scalability. This means customizability within certain boundaries, enabling our experts to optimize the axle to offer different power and torque figures. This approach allows lower costs, and a quick time to market.
Complementary Components
A great deal of power and torque from the e-axle requires a great deal of control. Our Drive Control Unit controls the motors and inverter. It is capable of controlling separate motors individually, handling all torque requests in the process. This makes both torque vectoring and anti-jerk control possible for our e-axles.
Vehicle Integration
We are not solely a components and systems supplier. Instead, we strive to immerse ourselves into our clients’ goals. With this in mind, our experts work towards not only optimizing our e-axles, but developing them in a way which supports the optimization of the client’s vehicle.