**5. High frequency motor for electric airplane**

This application illustrates the implementation of the concept for a motor operating at very high electrical frequency for an aeronautical application. It is a laboratory study [1] based on the motorisation specification of one of the first industrial all-electric aircraft, namely the Efan, from AIRBUS (**Figure 18**). The project was

**Figure 18.** *Prototype Efan (courtesy of AIRBUS).*

**Figure 19.** *Structure of the "per group" winding.*

### *High Power Very Low Voltage Electric Motor for Electric Vehicle DOI: http://dx.doi.org/10.5772/intechopen.99134*

quickly abandoned by AIRBUS, but it was taken up by several other companies, and some versions are now offered for sale to the aero clubs.

The power supply voltage of the Efan motor was equal to 300 V, we think that a VLV version would make sense to facilitate the maintenance operations of the aircraft, if it is particularly used in the aero clubs. This approach is all the more interesting as it also allows the search for very high specific performances thanks to the properties of the winding with only one solid bar per slot. The weight of the motor is, of course, one of the first sizing criteria.

#### **Figure 20.**

*High frequency electric motor prototype. (a) Wound stator. (b) Rotor assembly.*

