Abstract: The invention relates to a rotatory electric motor (1), comprising: a stator arrangement (2) with stator poles having permanent magnet stator poles (P) and consequent poles in an arrangement of consequent poles; and a rotor (6) having an armature made of a magnetically conductive material, with a ratio of the axial length (l) of the armature of the rotor (6) to a diameter (d) of the armature of the rotor from 1 to 2 being provided.

Abstract: In a compact motor 1 comprising a cylindrical permanent magnet 13, which is affixed to the inner surface of a hollow cylindrical yoke 12, and an armature core 22, which is provided at the interior of the permanent magnet 13, the armature core 22 comprises three slots 29 disposed at a uniform pitch, the permanent magnet 13 is bipolar-magnetized, and each magnetic pole has a maximum magnetic flux density value P in a range of 40° to 50° from the center at both sides of the magnetic pole, the maximum value P being within the range of 1.3 times to 1.8 times the magnetic flux density at the center of the magnetic pole.

Abstract: An electric motor comprises a stator and a rotor received in the stator. The stator comprises a shell. The shape of a cross section of the shell perpendicular to the rotor axis is a polygon. The shell comprises a plurality of side walls and arcuate connection portions connecting neighboring side walls. The stator comprises 2n magnets disposed in the arcuate connection portions. The magnets form 2m magnetic poles, where m, n are unequal positive integers. Optionally, m is equal to half or twice n. The permanent magnets of the motor are located in the inner angle of polygon shell. Thus the diameter of rotor can be the greater, and the power density of motor can be increased in the same volume.

Abstract: A limited rotation torque motor is disclosed that includes a rotor and a stator. The rotor includes a plurality of pairs of magnetic poles and the stator includes a plurality of pairs of stator coils. Each stator coils extends along a longitudinal length of the motor.