Coil assembly for three phased transverse axial flux multi disk machines

Abstract

This patent describes a coil assembly for a three phased permanent magnet (PM) iron free axial flux multi disc electric machine. The coil assembly is assembled from coil elements (15) made of flat wire (9), and then machined so they can be assembled into a flat disk. The coil elements (15) can further be inserted into a frame (22), and the coil elements (15) can be connected by wires (29) which do not cross each other.

Description

technical field [0001] The present invention relates to a coil assembly for a three-phase cross-axis flux multi-disc motor, wherein the coil elements are wound from flat wire / foil. Background technique [0002] Electric motors with high torque and power-to-weight / volume ratios and good efficiency find wide application, especially in vehicles where weight is important. Vehicles of this type may be, for example, various types of land vehicles or aircraft. [0003] One type of motor with a high theoretical power-to-weight / volume ratio is the cross-axis flux multi-disc motor. The advantage of this type of motor is that the magnetic flux passes through the entire motor, and thus iron is not necessarily required for each disk to change the direction of the magnetic field, saving iron and weight. However, it is difficult to manufacture such a motor because the coils must be strong enough to resist the electromagnetic forces to which they are exposed without back iron support. Ad...

AI Technical Summary

Problems solved by technology

However, it is difficult to make such a motor because the coils must be strong enough to resist the electromagnetic forces to which they are exposed without back iron support

In addition, it is difficult to wind the coils in such motors, because at least for ironless motors where the coils have a constant thickness, the optimal winding pattern tends to result in a solution that is difficult to assemble

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