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If T is the developed torque, L is the length of the electric machine, D is the diameter of the machine, B is the magnetic induction at the air gap, i dl is the current circulating in the windings and F is the developed force, we notice that, in the axial flux machine, the Torque-Diameter relationship goes with the third power, while on the radial flow machine the torque goes with the second power and linearly with the length. This leads to a reduction of overall dimensions on the axial flux machine with the same torque developed.

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The experience gained by Lucchi R. E-Motor Solutions in the production of axial flux motors and generators has highlighted several advantages for this type of electric machine: Due to these advantages and the unconventional form factor, Lucchi R. E-Motor Solutions decided to invest in the development of axial flux electrical machines with permanent magnets:

• High torque per unit of mass and volume
• High overload capacity
• High heat dissipation capacity and low losses
• High robustness
• Modularity and stackability

Due to these advantages and the unconventional form factor, Lucchi R. E-Motor Solutions decided to invest in the development of axial flux electrical machines with permanent magnets.

• Our typical axial flux machines have a stator in the middle and two rotors facing the sides of the stator.
• Each rotor consists of permanent magnets attached to a ferromagnetic disk that closes the magnetic flux.
• Rotors can be supported by bearings as part of the machine's mechanical structure, or by the customer's mechanical structure (frameless).

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• The form factor, especially the small axial length, allows us to stack two or more machines to achieve a scalable structure.
• In addition, each machine is electrically independent, allowing redundancy and continuity of service in case of a stage failure.

• Our windings are made with H class, or higher, enamel and thermal insulation which we can customize according to customers' needs and the performance to be achieved.
• Usually, our machines are made with flat copper wire - that compared to the traditional round wire - has an optimized filling factor. In this way, it reduces Joule losses and increases both the performance and efficiency of the electrical machine.
• We have made special machines that allow shaping flat wires.
  In this way, we ensure the production of large numbers and guarantee a qualitative and procedural standard.
• In addition to traditional wire windings, we are specialized in the realization of special windings with Litz Wire.

• Lucchi R. E-Motor Solutions has developed special patented cooling systems.
• Our machines are typically liquid-cooled to achieve the best performance.
• The cooling system, located in the mechanical frame of the machine, directly cools the stator windings maintaining a lower thermal resistance.
• Thanks to their high heat dissipation capacity, our machines achieve high torque values per unit of weight and volume.
• This cooling layout also has the ability to allow repeated and longer-lasting overloads.

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