A stator with closed slots with continuous winding is described, comprising: a first, internal stator part comprising longitudinal teeth, spaced by a space configured to make the lower part of the closed slots of the stator; a second, external annular stator part, comprising seats complementary with the teeth and configured to be meshed with the first stator part in order to form the closed slots and the stator; a continuous winding comprising a strap, which comprises first sectors mutually connected by second sectors alternate thereto, the strap being configured to be wound on the first, internal stator part, by placing the first sectors into the spaces included between the teeth; a process for making such stator is further described.

A process is described, for making a continuous winding for a stator of an electric machine comprising the following steps: bending on a plane of a strip to make a strap in a single piece, which comprises first sectors to be inserted inside closed slots of a stator and connected by second bending sectors which remain outside the slots; providing a first, internal stator part comprising a plurality of longitudinal teeth, spaced by a space which makes the lower part of the slots; making the winding on the first stator part, by placing the first sectors of strap in the spaces included between the teeth; and connecting the two free ends of every strap; a continuous winding made with such process is further described.

The disclosure relates to an electric machine including a stator having a plurality of teeth and on which a winding of the electric machine is arranged, wherein a respective intermediate space is formed between neighboring teeth. The electric machine further includes a rotor that may rotate relative to the stator, wherein an air gap is formed between the stator and the rotor. The electric machine further includes a plurality of closing devices for closing the respective intermediate spaces in relation to the air gap, and wherein a respective closing device of the plurality of closing devices is arranged between neighboring teeth of the stator.

A method is provided for producing a slot base insulation in a stator (210, 220), wherein the stator (210, 220) is part of an electrical machine and is constructed from a ferromagnetic material. The stator (210, 220) is provided with at least one slot (204) to fit a winding wire (122) in the at least one slot (204). The at least one slot (204) is coated with a soft-magnetic insulation material. A stator (210, 220) also is provided with the slot base insulation.

The present disclosure relates to tooth assemblies (100) comprising a tooth body (110), a winding (120) arranged around the tooth body (110) and a winding stopper (130). The winding stopper (130) comprises a first portion (131) shaped and dimensioned to be received in a groove (114) of the tooth body (110). Further, the winding stopper (130) comprises a second portion (132) extending from the first portion (131) and protruding from a first lateral wall (113) of the tooth body (110). Winding stoppers (130) and methods (800) for assembling a tooth assembly (100) are also provided.

An electric motor is provided that has a stator and a rotor rotatably mounted in the stator. The stator includes a plurality of motorettes, each having a ferrous metal core segment, and a conductive winding on the core segment. The plurality of motorettes are arranged in a circular arrangement, and a plurality of wedges are provided, with one of the wedges being positioned in each interface between the conductive windings of adjacent ones of the motorettes that presses the conductive windings of the adjacent ones of the motorettes towards respective ones of the ferrous metal core segments. This provides an arrangement with minimal or no air gaps between the conductive windings and the core segments, or an electric insulator on each of the core segments.

A locking wedge system for securing a stator coil in a slot of a stator core includes a slot layer positioned on the stator coil to inhibit movement of the stator coil within the slot, an outer wedge including a first tapered surface, an inner locking wedge positioned on the slot layer, the inner locking wedge including a second tapered face that interfaces with the first tapered face, a locking member configured to lock the inner locking wedge to the stator core, and an interlocking mechanism to couple the outer wedge to the inner locking wedge.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

A locking wedge system for securing a stator coil in a slot of a stator core includes a slot layer positioned on the stator coil to inhibit movement of the stator coil within the slot, an outer wedge including a first tapered surface, an inner locking wedge positioned on the slot layer, the inner locking wedge including a second tapered face that interfaces with the first tapered face, a locking member configured to lock the inner locking wedge to the stator core, and an interlocking mechanism to couple the outer wedge to the inner locking wedge.

A tool (110) is presented for installing a wedge (104) in a slot (101) of a stator core (100). The tool (110) includes a housing (112) and a shaft (128) extending axially from the housing. An end of the shaft (128) is positioned in the slot (101) on a first side of the wedge (104) to engage a wedge surface (118). The tool (110) further includes a pump (120) operatively coupled to the shaft (128) to actuate the shaft in an axial direction (122) external to the housing (112) to install the wedge in the slot. The tool (110) further includes a tongue (124) inserted in a vent gap (126) of the slot (101) on the first side of the wedge to brace the tool against the slot during the installation of the wedge. A system (200) and method (300) are also presented for installing the wedge.