Motor
First Claim
Patent Images
1. A motor comprising:
- a stator portion including an armature;
a rotor portion including a field magnet which generates, along with the armature, a torque centered about a central axis;
a bearing mechanism rotatably supporting the rotor portion with respect to the stator portion centered about the central axis;
a busbar unit arranged at one axial side of the motor to connect the armature to an external power source; and
a housing accommodating therein the stator portion, the rotor portion, the bearing mechanism, and the busbar unit;
whereinthe armature includes;
a plurality of teeth arranged in a circumferential direction centered about the central axis;
an insulator arranged to cover a surface of each tooth; and
a plurality of coils defined by a wire wound around corresponding teeth via the insulator;
the busbar unit includes;
a relay arranged to operate a control drive current conducted to the armature from the external power source;
a plurality of first busbars arranged to connect the coils and the external power source;
a plurality of second busbars arranged to connect the coils and the relay; and
a busbar holder arranged to retain the first busbars and the second busbars in a non-contact manner between the first busbars and the second busbars;
each first busbar includes at least one first terminal at which one end of each wire forming the coils is connected;
each second busbar includes at least one second terminal at which another end of each wire forming the coils is connected; and
the busbar holder has a substantially annular shape or a substantially arcuate shape centered about the central axis and is made of an insulating material.
1 Assignment
0 Petitions
Accused Products
Abstract
A motor having a busbar unit which is accommodated in a housing along with an armature includes a relay wherein the connection between the armature and the relay is secured. By virtue of such a configuration, reliability of the connection between the armature and the relay is improved. In the busbar unit, a plurality of first busbars and a plurality of second busbars each having a substantially arcuate shape are arranged so as to be circumferentially spaced apart from one another. The first busbars do not overlap with the second busbars in the axial and radial directions thereby reducing the dimensions of the motor in the axial and radial directions.
-
Citations
19 Claims
-
1. A motor comprising:
-
a stator portion including an armature; a rotor portion including a field magnet which generates, along with the armature, a torque centered about a central axis; a bearing mechanism rotatably supporting the rotor portion with respect to the stator portion centered about the central axis; a busbar unit arranged at one axial side of the motor to connect the armature to an external power source; and a housing accommodating therein the stator portion, the rotor portion, the bearing mechanism, and the busbar unit;
whereinthe armature includes; a plurality of teeth arranged in a circumferential direction centered about the central axis; an insulator arranged to cover a surface of each tooth; and a plurality of coils defined by a wire wound around corresponding teeth via the insulator; the busbar unit includes; a relay arranged to operate a control drive current conducted to the armature from the external power source; a plurality of first busbars arranged to connect the coils and the external power source; a plurality of second busbars arranged to connect the coils and the relay; and a busbar holder arranged to retain the first busbars and the second busbars in a non-contact manner between the first busbars and the second busbars; each first busbar includes at least one first terminal at which one end of each wire forming the coils is connected; each second busbar includes at least one second terminal at which another end of each wire forming the coils is connected; and the busbar holder has a substantially annular shape or a substantially arcuate shape centered about the central axis and is made of an insulating material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification