Abstract: The combined fan blade structure includes: an inner hub, an outer hub, a first blade set, and a second blade set. The outer hub and the inner hub are coaxially arranged, the first blade set is connected to an outer peripheral surface of the outer hub, the second blade set is located between the inner hub and the outer hub, and the outer hub blocks the second blade set.

Abstract: A brushless motor includes: at least one stator core, each stator core including a plurality of tooth groups which are spaced apart in a circumferential direction thereof, and the total number of the tooth groups being Z; a rotor, which is rotatable relative to the stator core, the rotor including a magnetic ring having P poles, and P being an even number; and at least two-phase wires, which are wound around the tooth groups to form coils on the tooth groups, the total number of phases of the wires being X, each phase wire having an independent first end and second end, for the same phase wire, the number of tooth groups spaced between coils on two adjacent tooth groups being X-1, winding directions of the coils on the two adjacent tooth groups in the circumferential direction of the tooth groups being opposite, and Z=P*X.

Abstract: A brushless electric motor includes: a stator iron core, which includes Z tooth groups arranged at intervals in a circumferential direction; a rotor, where the number of poles of a magnetic ring is P; and wires of X phases, which are wound around the tooth groups to form coils, where X?2, Z=P×X, and in wires of the same phase, the winding directions of coils on two adjacent tooth groups in the circumferential direction of the tooth groups are opposite, and the tooth groups are spaced apart by X-1 tooth groups. The driving circuit includes: X full-bridge circuits, where each full-bridge circuit includes two half-bridge circuits connected in parallel between an input end and a grounding end of the driving circuit.

Abstract: A brushless electric motor includes: a stator core, which includes Z tooth groups spaced apart from each other in a first circumferential direction; a rotor, which includes a magnetic ring having P poles, P being an even number; and X phase conductors, which are wound on the tooth groups to form coils, where X?2, and Z=P×X, wherein in the same phase conductor, the coils on two adjacent tooth groups have opposite winding directions in a second circumferential direction of the tooth groups, and are spaced apart by X?1 tooth groups.

Abstract: A brushless motor includes: a stator core, including Z tooth sets arranged at intervals in the circumferential direction; a rotor, including a magnetic ring with a pole number of P; and X-phase wires wound on the tooth sets to form coils, where X?2, and Z=P×X. In wires of the same phase, coils on two adjacent tooth sets have opposite winding directions in the circumferential directions of the tooth sets and are spaced apart by X?1 tooth sets. The driving method includes: via respectively independent first ends and second ends of N-phase wires, providing N driving signals having a periodic change to the N-phase wires.

Abstract: The combined fan blade structure includes: an inner hub, an outer hub, a first blade set, and a second blade set. The outer hub and the inner hub are coaxially arranged, the first blade set is connected to an outer peripheral surface of the outer hub, the second blade set is located between the inner hub and the outer hub, and the outer hub blocks the second blade set.