An insulator according to an embodiment is attached to teeth extending from one side surface in a radial direction of a ring-shaped stator core in the radial direction. The insulator ensures insulation between the teeth and a rectangular wire wound around the teeth with a number of windings. The insulator includes an end-surface cover portion, two side-surface cover portions, a first wall portion, a second wall portion, a protruding-stripe portion, and a recess. The end-surface cover portion covers an end surface of the teeth in an axial direction. The two side-surface cover portions cover both side surfaces of the teeth in a circumferential direction. At one side-surface cover portion of the two side-surface cover portions, a first winding of the rectangular wire is disposed, the rectangular wire is wound around the teeth with a number of windings, and the protruding-stripe portion and the recess are formed.

A stator for a rotary electric machine including a stator body, a winding having at least one bundle axially projecting from the stator body and winding ends extending from the stator body. An interconnector is mounted on the winding, the interconnector including an insulating body and traces including trace ends extending from the insulating body, the winding ends being assembled on the trace ends, wherein the interconnector also includes at least one means for positioning the interconnector on the winding in a radial direction.

A bus bar guide is provided to fix bus bars that connect a plurality of coils disposed in a motor. The bus bar includes a conductor that has a plate shape and has a first surface and a second surface continuous with the first surface. The bus bar guide is configured by annularly arranging a plurality of bus bar guide pieces each including an insulator. Each of the plurality of bus bar guide pieces is provided with a groove that holds the first surface of the bus bar and positions the bus bar.

Provided is an embodiment of a motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed so as to face the motor; a housing for accommodating the stator; and a bus bar electrically connected to the stator, wherein the housing comprises a first stepped part on which at least a part of the bus bar is disposed.

A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.

A stator for a rotary electric machine includes a stator body having an axis (X), and a winding including at least one overhang projecting axially from the stator body and winding ends extending axially beyond the overhang from the stator body. Also included is an interconnector mounted on the overhang of the winding, including an insulating body and at least one track having track ends. At least two winding ends are each assembled with one of the corresponding track ends, and the track ends are symmetrical relative to a plane containing the axis and relative to a plane transverse to the axis.

The present invention may provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, a busbar disposed above the stator, and a power terminal unit coupled to the busbar connected to the coils, wherein the power terminal unit includes a first groove, the busbar includes a busbar body and a plurality of terminals disposed on the busbar body, the busbar body includes a plurality of first protrusions protruding from an upper surface of the busbar body and disposed in the first groove, and the plurality of first protrusions are disposed on the same circular orbit based on a center of the busbar.

The present invention relates to a stator for an electric motor, comprising a plurality of separate teeth comprising a first connector and a second connector, a plurality of coils which are configured to be wound respectively around the plurality of separate teeth, a first end of the wire of the winding being configured to be positioned in the first connector and a second end of the wire of the winding being configured to be positioned in the second connector, a central module configured to receive the separate teeth, said central module comprising connecting frames comprising connecting tabs extending radially and configured to be inserted in a first connector or in a second connector of a separate tooth, the connecting frames being configured to provide electrical connections between the coils.

A stator has a stator coil provided on an annular stator core. The stator coil is formed of electrical conductor wires each including an electrical conductor and an insulating coat. Each of the electrical conductor wires has a pair of exposed portions where the electrical conductor is exposed from the insulating coat and a covered portion where the electrical conductor is covered with the insulating coat. The pair of exposed portions are formed respectively at opposite end portions of the electrical conductor wire. The covered portion is formed at other portions of the electrical conductor wire than the end portions. At a coil end part of the stator coil, each corresponding pair of the exposed portions of the electrical conductor wires are welded together and each of the covered portions of the electrical conductor wires includes a coat-removed portion where the insulating coat is locally removed from the covered portion.

A rotating electric machine includes a rotor rotatable about an axis, a stator, and a motor housing accommodating the rotor and the stator. The motor housing includes a refrigerant channel through which the refrigerant flows, and a pair of channel ports respectively located at both end portions of the refrigerant channel. The refrigerant channel includes a meander channel extending in a wave shape along the circumferential direction, and a pair of end channels connecting an end portion of the meander channel and a channel port. At least one of the end channels includes a first circumferential channel portion extending along the circumferential direction, a second circumferential channel portion extending along the circumferential direction and overlapping the first circumferential channel portion as viewed along the axis, and an axial channel portion extending along the axial direction and connecting the first circumferential channel portion and the second circumferential channel portion.