Lightweight garage #30 axial flux motor @ Koenigsegg Regera

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Lightweight garage, News

©Aab254, Front 3/4 view of Koenigsegg Regera

The vehicle

Koenigsegg produced the Regera from 2016 to 2019. With a length of 4560 mm and a height of 1110 mm and a total output above 1110 kW, the hybrid sports car accelerated to 400 km/h in 22.87 seconds. The Regera is powered by a 5-liter V8, a YASA P400 and two YASA 750 R electric motors without a classic manual gearbox and, according to the manufacturer, the Regera had the most power-dense high-voltage battery.

The technology

Axial flux motors are designed so that the electromagnetic flux flows parallel to the axis of rotation of the motor instead of radially between the rotor and stator. This results in efficient utilization of the installation space and a higher torque due to the leverage effect of the magnets, which are further away from the axis of rotation. The cooling surface of the copper wire coils is also increased, so that cooling can be simplified. By using the 160 kW electric motor with 28.2 kg directly on the crankshaft and two 180 kW electric motors with 37 kg each on the drive axle, yaw control is achieved.

Matti Blume, Koenigsegg Regera, GIMS 2019, Le Grand-Saconnex

The lightweight aspect

The torque increase is around 30 % and at the same time the mass of iron in the stator is reduced by 80 % as the stator yoke is eliminated. Compared to permanently excited synchronous motors with 150 kW, for example, as in the ID3 from Volkswagen, the weight is approximately halved. However, it should be noted that the axial motors only provide around 60 kW in continuous operation.

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