An electric motor includes a stator including four split cores, and a rotor having four magnetic poles. Each of the split cores includes a yoke and a tooth. An angle θ1 [degree] formed by a side surface of the tooth and a side surface of the yoke on an inner side in a radial direction of the stator satisfies 90 degrees ≤θ1<180 degrees.

Two types of insulating members, i.e., end surface insulators and slot insulators are provided. On tooth portion sides of both side surfaces in the circumferential direction of tooth end surface covering portions of the end surface insulator, first cutouts recessed in the circumferential direction are provided so as to extend in the radial direction. A part axially upward of the first cutouts protrudes in the circumferential direction to form a first overhang portion, and the slot insulator is accommodated between the first overhang portions of two end surface insulators.

A stator includes a plurality of core constituent members arranged side by side in a circumferential direction, each of which has a tooth extending in a radial direction and a pair of core outer extension portion extending in the both circumferential directions from a radial outer end portion of the tooth, and an insulator covering at least a part of the tooth, and a coil wound around the tooth via the insulator. The coil includes a terminal inner coil having a terminal line which is drawn from the radially inner side to the one axial side. The insulator covers the tooth that are circumferentially adjacent to the tooth around which the terminal inner coil is wound. The insulator has a restriction portion so as to restrict the movement of the terminal line of the terminal inner coil.

An electric work machine includes: a motor having a rotor disposed in an interior of a stator and being rotatable about a rotational axis; and an output shaft, on which a tool accessory is mountable and which is configured to be driven using motive power output from the motor. The stator includes: a stator core; a coil wound on a portion of the stator core; and a fusing terminal disposed more inward in a radial direction of the stator core than the coil and being connected to the coil.

In some examples, a connecting ring may connect to a stator coil. The connecting ring may include at least one linear conductor integrally formed in a ring-like shape. Further, the connecting ring may include a terminal section integrally formed in the linear conductor, the terminal section including a hole configured to receive a wire end of the stator coil inserted into the hole in an insertion direction. In addition, the connecting ring may include a cylindrical protrusion having an opening in communication with the hole. The cylindrical protrusion may protrude away from the hole in the insertion direction. Additionally, the connecting ring may include bends for raising a first portion of the connecting ring including the terminal section in the insertion direction relative to a second portion of the connecting ring. An insulating member may cover the second portion of the connecting ring.

A stator for a rotary electric machine of an embodiment includes: a dividing core including a yoke portion and a teeth portion protruding in an inner peripheral direction from the yoke portion; bobbins that are made of an insulating material and are arranged on both ends in an axial direction of the dividing core; a coil that is wound around the bobbin; and insulating papers that are arranged along an inner peripheral surface of the yoke portion and a side surface of the teeth portion and insulate the coil and the dividing core from each other between both the bobbins, and each of the bobbins is formed with a groove into which an axial end of the insulating paper is inserted, and the groove is configured such that a width dimension of a part along the inner peripheral surface of the yoke portion is larger than a width dimension of a part along the side surface of the teeth portion.

A magnet unit includes a plurality of arc-shaped magnets arranged in a circumferential direction and a magnet holder to which the magnets are secured. Each of the magnets has arc-shaped easy axes of magnetization which extend more parallel to the d-axis in a region close to the d-axis than those in a region close to the q-axis. The easy axes of magnetization define arc-shaped magnetic paths extending therealong. The magnets are arranged to be separate from each other across the d-axis or the q-axis. Each of the magnets has a q-axis end surface facing in the circumferential direction and placed in surface-to-surface contact with that of the circumferentially adjacent magnet. Each of the magnets has an armature-remote peripheral surface which faces away from the armature. Each of the armature-remote peripheral surfaces facing an attachment surface of the magnet holder through a clearance which is filled with a resin adhesive.

Insulators each include a plurality of board holding claws projecting from an outer peripheral edge of the circuit board for engaging a plurality of board recesses, the plurality of board holding claws are arranged on the outer peripheral edge of the circuit board such that an interval of board holding claws on a connector-mounted side is smaller than an interval between board holding claws on a counter-connector-mounted side, and a load receiving pin, which receives a radial load, projects at a counter-connector-mounted position, which is opposite to a mounted position of a connector.

A stator includes a yoke extending in a circumferential direction about an axis line, a tooth extending from the yoke in a first direction toward the axis line, and a coil wound around and fixed to the tooth. The yoke has an inner wall surface facing the axis line. The tooth has a root part connected to the yoke. The inner wall surface of the yoke is a flat surface extending from an end of the root part of the tooth in the circumferential direction to an inner circumferential side relative to a plane passing through the end and perpendicular to the first direction.

A handheld power tool includes a housing and an electric motor. The housing is formed with a grip for a user to hold. The electric motor is disposed in the housing and used for driving a functional accessory to implement a function of the handheld power tool, where output power of the electric motor is greater than or equal to 120 W and less than or equal to 4500 W. The electric motor includes at least a stator, a rotor, and multiple coil windings disposed on the stator. A cross-section of each of the multiple coil windings is non-circular, and a slot fill factor of the electric motor is greater than or equal to 40%.