Synchronous motor with magnetized rotor for drones created in Russia

Moscow engineer Vladimir Luchnikov has developed an unusual drone engine where cooling is integrated directly into the casing, and the rotor has been transformed into a lightweight aluminum cylinder with rare-earth magnets. Special holes for heat dissipation were made in the stator casings.

The engine itself will be made of aluminum alloy to reduce mass. For drones, this is critically important, as every extra gram directly affects flight range and payload.

The new design simultaneously reduces engine weight, increases its specific power, and improves structural rigidity.

The design also uses rare-earth magnets SmCo5 or Nd2Fe14B with high coercive force. In addition, the engine received an integrated aluminum radiator for cooling the stator windings.

Another feature is that the number of stator poles is less than the number of magnets on the rotor. According to the engineers' idea, this allows for an increase in the specific power of the engine.