摘要:
An electric motor has an armature rotatably accommodated inside a motor housing and a pair of magnets fixed to an inner surface of the motor housing so as to face the armature. The armature has an armature core 17 fixed to a rotating shaft 16, and ten slots S1 to S10 formed on the armature core accommodate coils. These slots S1 to S10 are of four types that are different in shape, thereby enhancing a lamination factor of each coil. Also, these slots S1 to S10 are formed so as to be tilted in a rotating direction with respect to an axial direction of the rotating shaft 16. Therefore, a magnetic imbalance caused by the slots S1 to S10 being formed in varying shapes is uniformized.
摘要:
The invention relates to a stator arrangement for an electric machine, particularly a DC motor, comprising a stator body having a stator back yoke ring and a number of stator teeth between which stator slots to receive stator windings are formed, the stator teeth extending radially from the stator back yoke ring and stator poles being formed at the free ends of the stator teeth, the stator teeth being coupled to a sleeve, which extends coaxially to the stator body, at their free ends. The invention also relates to a method for the manufacture of a stator arrangement of this kind and a direct current motor that employs such a stator arrangement.
摘要:
A direct current motor having an armature supported between magnetic pole plates having pairs of dual pole shoes extending between the plates in diametric opposition with respect to the periphery of the armature is energized by direct current through a pair of iron coil cores at opposite sides of the armature and connected with the magnetic pole plates. In other embodiments, the magnetic flux pattern facing the armature is longitudinally divided by a groove in the respective pole of the pairs of pole shoes facing the armature. Wiring and electrical current controls connect a DC source to the coils and armature for operating the armature and providing a selected torque with a minimum of ampere drain from the DC source.
摘要:
A motor comprising a frame and one or a plurality of magnets disposed inside the frame, wherein a gap extending in a circumferential direction is provided between an inner peripheral surface of the frame and an outer peripheral surface of the magnet, and the magnet and the frame arranged at both sides of the gap are coupled together in a rotational shaft direction by means of an adhesive.
摘要:
A permanent magnet motor has a rotor and a stator. The rotor has a shaft, a rotor core fixed to the shaft, a commutator fixed to the shaft adjacent to the rotor core, and rotor windings wound about poles of the rotor core and electrically connected to the commutator. The stator includes a magnetically conductive round housing, permanent magnets fixed to an inner surface of the housing, and brushes for making sliding contact with the commutator. The ratio of an outer diameter of the rotor core to an outer diameter of the housing is between 66% to 84%.
摘要:
An electric motor comprises a stator and a rotor rotatably mounted confronting the stator. The rotor has a rotor core which comprises at least a first tooth, a second tooth and a third tooth which are adjacent. Each of the teeth comprises a rib section radially and outwardly extending from a core and a tooth section located at an outer end of the rib section. The angle between the first tooth and the second tooth is n degrees, wherein when the rotor core is rotated n degrees to move the first tooth towards the second tooth, the rotated second tooth does not coincide with the pre-rotated third tooth.
摘要:
An electric motor has an armature rotatably accommodated inside a motor housing and a pair of magnets fixed to an inner surface of the motor housing so as to face the armature. The armature has an armature core 17 fixed to a rotating shaft 16, and ten slots S1 to S10 formed on the armature core accommodate coils. These slots S1 to S10 are of four types that are different in shape, thereby enhancing a lamination factor of each coil. Also, these slots S1 to S10 are formed so as to be tilted in a rotating direction with respect to an axial direction of the rotating shaft 16. Therefore, a magnetic imbalance caused by the slots S1 to S10 being formed in varying shapes is uniformized.
摘要:
In order to provide a vibration motor which can make a starting force strong with maintaining saving electric power and increase a vibration force, in the vibration motor, a facing gap between a central salient pole and a pair of auxiliary salient poles are shifted and arranged around a rotating shaft with non-centrosymmetry and a facing gap between the central salient pole and the field magnet is formed narrower than facing magnets between the auxiliary salient poles and the field magnet. Further, an exciting force of the central salient pole is greater than that of the auxiliary salient poles and in starting, the same magnetic pole as the magnetic pole of the field magnet generates in a facing surface of the central salient pole and a repulsive force occurs so that the armature core is urged to rotate.
摘要:
A small-sized motor includes a rotor, which, in turn, includes a shaft, a laminated core forming salient magnetic poles an odd number and mounted on the shaft, windings, each being wound around a plurality of salient magnetic poles, and a commutator mounted on the shaft. Each salient magnetic pole includes an arm portion and wing portions, which are integrated with ends of the arm portion and circumferentially extends symmetrically with respect to the arm portion. When core laminations of the laminated core each has a thickness u, the laminated core has a diameter D, and the wing portion has a thickness t as measured at its root in a radial direction, the thickness t falls within the range from 5.5% the core diameter D as an upper limit to the core-lamination thickness u as a lower limit. Thus, it becomes possible to solve a problem of a rotor having an odd number of poles in that vibration is likely to arise, to thereby suppress vibration, while maintaining a feature of the rotor that a large torque can be produced.
摘要:
A direct current motor having one or more armatures supported between magnetic pole plates having pairs of pole pieces extending, in diametric opposition with respect to the periphery of an armature between the plates adjacent the perimeter of the armature or armatures, and is energized by direct current through one or more iron coil cores interposed between and connected with the magnetic pole plates. Wiring and electrical current controls connect a DC source to the coils and armatures for selectively operating the armatures and providing a selected torque with a minimum of ampere drain from the DC source.