Schaeffler is entering the electric motor manufacturing sector, betting on a modular and integrated technology platform. The electric motors line was designed to offer efficiency and a good relation to the vehicle's performance. Possible applications range from hybrid modules and dedicated hybrid transmissions (DHTs), to electric motors for propulsion of electric axles. Voltage ranges from 48 to 800V and power classes from 15 to over 300kW are possible.
The electric motors of the P2 hybrid modules are subject to special requirements, as their design implies operating at the same speed as the internal combustion engine. The minimum axial length and the large free space inside the rotor for the integration of the clutch and drive system, guarantee the high compaction required for this type of application.
The brushless motor with concentrated winding allows extremely small axial installation spaces and is available in 48 V and high voltage versions with powers from 15 to 120 kW. If the hybrid module is designed for dry clutch, the stator is actively cooled using a cooling jacket.
In wet clutch systems, the available oil can also be used to lower the temperature of the electric motor, which leads to significantly better heat dissipation and therefore allows continuous working at high power. However, the best type of energy loss is the one that never occurs, which is why motors are optimized for high efficiency across their entire operating range.
The portfolio is completed by a variety of electric motors for propulsion on electric axles. They cover high voltage classes 2 (400 V) and high voltage 3 (800 V), and with output powers from 100 kW to 300 kW. If the system design allows, these motors can be configured for high maximum speeds of up to 20,000 rpm, which allows the benefits of wave winding to be fully utilized.
Matthias Zink, Automotive OEM CEO at Schaeffler, explains:
“By acquiring new expertise in the development and production of electric motors in-house, we are not only expanding our portfolio, but also consistently pursuing our electric mobility strategy. Our extensive knowledge of systems and the solutions created from this experience place us today in front of customers as a recognized and reliable manufacturer of systems and components, which according to the requirements and needs of mobility can provide ideal products”.
Optimism is the right word when talking about the electric future for automobiles. Virtually all manufacturers are in the process of presenting their plans for a complete line for electric cars.