An electric machine includes a plurality of electromagnetic coils arranged circumferentially about the axis of rotation. Each coil defines a trapezoidally-shaped and tapered coil opening. The electric machine also includes a plurality of yokes that extend in an axial direction and a plurality of teeth. At least one of the plurality of yokes is tapered in the axial direction, and at least one tooth extends from each of the plurality of yokes. The plurality of teeth are each tapered in a radial direction to enable the plurality of teeth to fit within a corresponding trapezoidally-shaped and tapered coil opening.

An insulating member that includes an insulating member body including a first insulating sheet provided in an annular shape to cover a coil that includes a slot-held section and a coil end section, the slot-held section configured to be held in a slot of a stator core, the coil end section configured to protrude from an end surface of the stator core in a rotation axis direction, wherein the first insulating sheet includes a folded-back section that is provided in a portion corresponding to a bent section of the coil and in the portion the first insulating sheet is folded back a plurality of times such that layers of the first insulating sheet are stacked.

The described technology relates to a stator of a planar type motor and a planar type motor using the same, which are easy to manufacture and are capable of reducing core losses, thereby maximizing motor performance. First cores that are difficult to form by stacking electrical steel plates are formed of soft magnetic powders, and second cores that are formed by stacking electrical steel plates having the same size are arranged in a region where a vortex is concentrated, thereby allowing easy manufacture and being capable of maximizing the performance of the planar type motor.

An embodiment relates to a stator and motor, the stator comprising: a stator core having teeth; and a coil wound on the teeth, wherein each tooth comprises a body around which the coil is wound, and a shoe connected to the body, and the shoe comprises a plurality of grooves, and the width of the grooves, which are in the circumferential direction, is 90-110% of the width of a slot opening between the teeth. In addition, the motor forms grooves on the teeth of the stator, increasing the main cogging differential, thereby providing the benefit of significantly reducing the cogging torque.

A geared motor may include a first case member, a support member disposed on one side in a motor axial line direction with respect to the first case member and connected with the first case member, a stator in a tube shape disposed between the first case member and the support member, a rotor disposed on an inner side with respect to the stator, a rotor support shaft rotatably supporting the rotor, and a gear train structured to transmit rotation of the rotor. The first case member may be provided with a radial direction positioning part which positions the stator in a radial direction and a first support part for the rotor support shaft which supports an end part on the other side in the motor axial line direction of the rotor support shaft.

Disclosed are a coil component and an electronic expansion valve with the coil component. The coil component includes an injection molded part, a stator housing, a stator pole plate and a circuit board. The stator housing, the stator pole plate and the circuit board are all provided in the injection molded part. The coil component further includes: a fixing part, the fixing part is provided in the injection molded part; a conductive part, the conductive part is provided on the fixing part, and the conductive part is configured to conductively connect at least one of the stator housing and the stator pole plate to the circuit board; and a sensor, the sensor is provided on the fixing part, and the sensor is connected to the circuit board.

Disclosed is a generator magnet configuration that may be used in connection with energy harvesting technologies. In some embodiments, an electrical generator may include a generator magnet positioned within a coil wire such that the generator magnet's magnetic field is normal to the coil. The generator magnet may be actuated from a first, substantially vertical orientation to a second, substantially horizontal orientation. The generator magnet may rotate from the substantially horizontal orientation to the substantially vertical orientation when the actuation is released, such that the magnetic field of the generator magnet induces a voltage across the coil. In some embodiments, the generator magnet may form a stacked configuration on top of a stationary magnet.

A stator includes a core back that has an annular shape and that extends in a circumferential direction about a central axis that extends in a vertical direction, teeth that extend in a radial direction from the core back, bobbins attachable in the radial direction to the teeth, and coil wires wound around the bobbins. The bobbins each include a cylindrical portion that extends in the radial direction and a protrusion that protrudes in the radial direction from an upper end portion of the cylindrical portion on a core back side and that is fixed to the core back.

Obtain a rotary electric machine in which an insulation capability of bus-bar units is maintained in order to supply current to a coil of a stator of the rotary electric machine, and the whole stator can be downsized. In the arc-shaped bus-bar units which are laminated and arranged on a coil end of a stator of the rotary electric machine, a neutral-point bus-bar unit, which includes a neutral-point bus-bar is arranged at a midpoint of phase's bus-bar units, which include phase's bus bars.

An electrical machine for an aircraft electrical power system includes a stator having current-carrying coils and flux guiding stator iron defining one or more stator slots that house the current-carrying coils. The electrical machine further includes a rotor having a plurality of permanent magnets configured to interact with the stator to produce a torque. The electrical machine has an active parts mass, m.sub.act, which is a cumulated mass of components of the electrical machine that contribute to producing the torque. The electrical machine is configured to produce a peak rated torque, ?.sub.peak. The electrical machine has a slot current density, J.sub.slot,peak, when producing the peak rated torque, ?.sub.peak. A value of a machine parameter, ?, defined as: ?=?.sub.peak/(m.sub.act?J.sub.slot,peak) is greater than or equal to 5 ?Nm.sup.3 kg.sup.?1A.sup.?1.