An apparatus and methods are provided for a segmented stator comprising over-molded windings and an incorporated bus bar for a multi-phase electric motor. The segmented stator comprises a plurality of stator segments that are arranged into a circular configuration. Each stator segment comprises a divided core that includes a core back portion and a core tooth portion. An insulator is disposed on at least the core tooth portion, and a winding of magnet wire is disposed on the insulator. An over-molded encapsulation is applied to fixate the divided core and the winding. A bus bar is incorporated into the stator segments and placed into electrical communication with the windings. The bus bar includes annular conductors that may be over-molded such that the bus bar is encapsulated within the segmented stator. Connectors coupled with the bus bar are configured for passing an electric current to the stator segments.

A non-output-side end shield (100) for a brushless electric motor (500) is provided, including a centrally arranged bearing seat (110) for accommodating a non-output-side rotor bearing (510) for a rotor shaft (560) of the brushless electric motor (500), the non-output-side end shield (100) including a sensor receptacle (150), which is used as a carrier for a sensor circuit board (550) for detecting the rotational position of the rotor shaft (560), the non-output-side end shield (100) and the sensor receptacle (150) being formed together as a one-part component.

One aspect of a pump of the present invention includes a rotor rotatable about a central axis, a stator assembly located radially outside the rotor and surrounding the rotor, a pump unit connected to a first side in an axial direction of the rotor, a support member including a rotor accommodating portion, the rotor accommodating portion being located radially inside the stator assembly and accommodates the rotor therein, and a resin housing in which the stator assembly and the support member are molded. The rotor accommodating portion includes a lid portion that covers the rotor from a second side in the axial direction, and a tubular portion that is located between the rotor and the stator assembly in a radial direction and is open to the first side in the axial direction. The stator assembly includes a stator core having an annular shape, a plurality of coils mounted on the stator core, and a stator cover that covers the plurality of coils.

An electric pump includes a stator assembly. The stator assembly includes a stator core and a winding. The winding includes a main body section, a first section, and a second section. The stator core includes a core tooth portion, a core yoke portion, and a core neck portion. A first reference plane is defined, which coincides with a center axis line of the core tooth portion in an axial direction thereof and a center axis line of the core neck portion in an axial direction thereof. In a cross section of the stator assembly along the first reference plane, an upper end of the main body section is level with an upper end of a main body portion of the core yoke portion, and a lower end of the main body section is level with a lower end of the main body portion of the core yoke portion.

A brushless motor is provided that includes a stator assy and a rotor. The stator assy includes a stator, a housing that has a space where the stator is disposed, and an insulating resin disposed in the space. The insulating resin fixes the housing to the stator. The housing includes a first housing member and a second housing member. The insulating resin also fixes first housing member to the second housing member.

A power tool is provided including a gear case having a spindle, a motor case connected to a rear end of the gear case along a longitudinal axis; a handle portion extending from a rear end of the motor case along the longitudinal axis; a motor housed inside the motor case; a fan in rotational connection with the motor; at least one air intake arranged at least one of the motor case or the handle portion near the rear end of the motor case; and a power module including power switches for driving the motor and a heat sink. The power module is housed in at least one of the motor case or the handle portion near the rear end of the motor case such that rotation of the fan causes air flow to enter through the air intake and flow near the heat sink and through the motor.

Configurations are described that provide uniform heat distribution of resistive heaters. These configurations allow successful anti-icing and deicing with relatively low applied power. One aspect involves the use of a thin film heater applied just underneath the topcoat to efficiently direct all heat to the surface, allowing anti-icing and de-icing with minimal power. This can be accomplished by employing a hybrid electrode interface, using a metal foil or metal braid that is attached to the aircraft surface with a structural adhesive that has been smoothed along the edges with metal-filled adhesive. Another aspect uses an array of heater cells created as a single sheet and a heat spreading material, provided underneath or overtop of the heater cells.

An electric motor including a motor rotor and a motor stator including a stator core including a plurality of stator teeth spaced along a circumferential direction of the stator core, a plurality of coil groups, wherein each of the plurality of coil groups includes a plurality of coils wound on a corresponding stator tooth, and an incoming line terminal and an outgoing terminal both comprising a same number of coil ends, and two motor lead groups, wherein a number of the plurality of motor leads of each of the two motor lead groups is equal to a number of the plurality of coil groups, and wherein each of the plurality of motor leads is connected to one incoming line terminal or one outgoing line terminal of one corresponding coil group of the plurality of coil groups.

The bus bar includes the motor connection member electrically connected to the coil provided in the motor, and the terminal member that is formed of a separate member from the motor connection member and is electrically connected to the external terminal. The motor connection member includes the body portion electrically connected to the coil, and the bent portion that is bent at the first end portion of the body portion in a direction intersecting with the body portion. The terminal member is connected to the bent portion.

An electric work machine includes magnets appropriately fixed to a rotor core. The electric work machine includes a stator including a stator core, an insulator fixed to the stator core, and a coil attached to the insulator, a rotor rotatable about a rotation axis and including a rotor core, a magnet fixed to the rotor core, and a rotor cup supporting the rotor core and including a core support surface supporting an end face of the rotor core in a first axial direction along the rotation axis and a magnet support surface supporting at least a part of an end face of the magnet in the first axial direction, and an output unit drivable by the rotor.