A stator for an electric machine, having a winding including a plurality of interconnected conductors which are assigned to one or more phases, wherein: ends of at least some of the conductors project axially or radially beyond the winding. An interconnection ring having at least one support ring on which at least one bus bar is arranged is axially placed onto the winding, and the support ring is formed from a plastic and has concentrically extending annular grooves in each of which at least one bus bar is arranged. At least one end of a conductor is connected to a bus bar, at least one bus bar arranged in an annular groove is captively held in the annular groove by means of a bus bar securing element which overlaps at least portions of the annular groove in the radial direction, and the bus bar securing element as shaped by plastic deformation of a staking element which is formed integrally, in the axial direction from the support ring between two adjacent annular grooves, with the support ring.

An electric motor with stator includes pairs of windings. Winding wire ends of the pairs of windings are electrically contacted at end surfaces with three busbars to define three phases. The three busbars include power source connection terminals which are located adjacent to one another, and the second and third busbars extending over an angular range of approximately 210, having a same contact scheme with four contact points following one another in the circumferential direction to contact the winding ends and are offset from one another by approximately 120 in the circumferential direction, and the first busbar has a different contact scheme. The first busbar includes a first section and a second section, three contact points located in the first section, a further contact point being located in the second section.

A cooling arrangement for cooling a stator for an electric machine. The cooling arrangement comprising a stator fixedly mounted relative to a rotational axis. The stator comprises a stator yoke and stator grooves. Windings are provided in the stator grooves, which form first and second winding heads. First and second fluid rings are provided at opposite ends on the stator yoke. The first fluid ring has a fluid inflow opening from a stator housing. The stator yoke has a plurality of axial stator ducts extending in the axial direction, which enable the inflowing fluid to flow through from the first fluid ring to the second fluid ring, and the second fluid ring redirects some of the fluid.

A stator for an electric machine having a plurality of pins, which are arranged on concentric circles at different distances from a stator center point in slots in the stator, and each concentric circle forms a layer, where four pins in different layers are connected to one another in series and form a winding. A first pin of the winding is located in a first slot in the 4n-3 layer, wherein n is a natural number, a second pin of the winding is located in a second slot in the 4n-2 layer, wherein the second slot is at a first radial distance from the first slot in a first circumferential direction of the stator, a third pin of the winding is located in the first slot in the 4n layer, and a fourth pin of the winding is located in the second slot in the 4n-3 layer.

Power tools described herein may include a housing, a motor, and a plurality of terminals. A slot may be formed between at least two terminal posts protruding from a surface of each terminal. A motor wire may be configured to be secured to its respective terminal within the slot by pressing a tip of a first electrode into contact with an outer portion of at least one terminal post of the at least two terminal posts, and performing a securing process (e.g., welding, fusing, etc.) by controlling current to pass through the first electrode to a second electrode that is also in contact with the respective terminal. The tip of the first electrode may be configured to prevent the at least one terminal post from moving outwardly away from a center of the respective terminal during the performance of the securing process.

A stator assembly for a BLDC motor includes a stator core, at least one magnet wire wound on poles of the stator core, an end insulator mounted on an end surface of the stator core, a non-conductive mount member mounted on the outer circumferential surface of the stator core, and conductive terminals mounted on the non-conductive mount member. Each conductive terminal includes: a main portion mounted on the non-conductive mount, a tang portion extending from a first longitudinal end adjacent the end insulator and folded over the main portion, and a connection tab extending angularly from a second longitudinal end. A contact portion of the magnet wire is wrapped around the tang portion and fused to make an electric connection to the conductive terminal.

A vibration motor includes a base portion arranged to extend perpendicularly to a central axis extending in a vertical direction; a shaft having a lower end fixed to the base portion, and arranged to project upward along the central axis; a circuit board; a coil portion; a bearing portion; a rotor holder; a magnet portion; an eccentric weight; a cover portion; and a motor electrode portion electrically connected to the circuit board, and arranged to project downward below a lower surface of the base portion. The entire base portion and the entire circuit board are arranged inside of an outer circumferential edge of a lower end of the cover portion.

An electric motor has a stator positioned lengthwise within and fixed to a case. The stator has a stator core, a coil wound around a tooth extending from the stator core, and an insulating member attached to the stator core wherein the insulating member is configured to insulate the coil from the stator core. A wire holding part extends from the insulating member to hold a wire within an outer diameter of the insulating member. A rotor is positioned lengthwise along an inner circumference of the stator wherein the rotor is configured to rotate about a motor axis extending lengthwise across the electric motor.

An epoxy resin formulation is disclosed, comprising at least an epoxy resin of the type of bisphenol A or F, at least a hardener of type diamine, e.g. polyoxypropylendiam or polyoxypropylenetriamine, and with or without an aliphatic diamine having benzene ring e.g. Xylylenediamine and at least an inorganic filler. Further disclosed is a support to surround end windings of a stator of an electric machine, the support made from an epoxy resin formulation and the use of an epoxy resin as support. Further disclosed is a method to fabricate an epoxy resin formulation , including mixing, with a temperature between 15 C. and 35 C., at least an epoxy resin of the type of bisphenol A or F, at least a hardener of type diamine, e.g. polyoxypropylendiam or polyoxypropylenetriamine, and at least an inorganic filler, casting the epoxy resin formulation with a temperature between 15 C. and 35 C., and postcuring the epoxy resin formulation for several hours with a temperature between 60 C. and 100 C.

A motor may include a stator having coil groups of plural phases and a connector, the stator comprising a plurality of split stators. Each of the split stators may include a split core having an arc-shaped core back section and a tooth section, an insulator, a coil which has a lead-out line that is connected to the connector. The insulator may have a first void extending between a first inner wall and a first outer wall. The first inner wall may have a lead-in groove. The stator may have a support ring disposed on the upper side of the first void. The support ring may have a second void extending between a second inner wall and a second outer wall. A plurality of lead-out lines of different phases may respectively accommodated in the first void and the second void.