Multi-excitation-source axial-flux permanent-magnet motor with partitioned, hierarchical, and variable poles, and variable-condition driving control system

A logging method based on a time-domain electromagnetic tensor, wherein the method comprising:

• A multi-excitation-source poles-partitioned dual-stator axial-flux controllable permanent-magnet motor, comprising a first stator, a second stator, a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet, a first rotor yoke, a second rotor yoke, a first armature winding, a second armature winding, a first field winding, a second field winding, a first air gap, and a second air gap, wherein the first stator and the second stator are symmetrically provided outside the motor, with respective slots facing inward;
• the first armature winding is wound on stator teeth of the first stator in a distributed structure;
• the second armature winding is wound on stator teeth of the second stator in a distributed structure;
• the first field winding is wound on the stator teeth of the first stator in a centralized structure;
• the second field winding is wound on the stator teeth of the second stator in a centralized structure;
• the first rotor yoke and the second rotor yoke are symmetrically provided inside the motor, with respective slots facing inward;
• a plurality of fan-shaped slots are uniformly distributed inside the first rotor yoke and each are provided therein with the third permanent magnet;
• a plurality of fan-shaped slots are uniformly distributed inside the second rotor yoke and each are provided therein with the fourth permanent magnet;
• positions of the fan-shaped slots on the first rotor yoke and the second rotor yoke are completely symmetrical;
• the first permanent magnet and the second permanent magnet are provided between the first rotor yoke and the second rotor yoke;
• the first permanent magnet and the second permanent magnet are spaced apart from each other and circumferentially staggered from the third permanent magnet and the fourth permanent magnet;
• the first air gap is provided between an inner side of the first stator and an outer side of the first rotor yoke;
• the second air gap is provided between an inner side of the second stator and an outer side of the second rotor yoke;
• and an axis of the first stator and the second stator coincides with a rotational axis of the first rotor yoke and the second rotor yoke.