A system and method for manufacturing a stator-assembly for an electric machine, which comprises a stator and a busbar for electrically connecting coils of the stator to a controller of the electric machine. Simplified and cost-effective manufacture with reduced cycle times is achieved by encasing the busbar with an electrically insulating busbar material and then electrically connecting it to the coils, with joint sections in which the coils are electrically connected to the busbar also being separately electrically insulated after said electrical connecting.

A method for producing a formed coil winding includes providing a main body having a plurality of slots distributed across the circumference for arranging layered coils; providing at least one layered coil having a first coil side and a second coil side; arranging the first coil side in a slot in the main body, wherein the layered coil forms a projection at each of the two ends of the main body; form-fittingly and/or frictionally holding the first coil side in an exit region from the slot for holding the first coil side in the slot in a rotationally fixed manner; twisting the coil sides relative to one another in a circumferential direction until the second coil side is aligned with another slot in the main body; and radially shifting the second coil side for arrangement in the other slot.

One or more aspects of the present application relate to cooling management system implemented as part of an electric motor. Illustratively, the cooling management system corresponds to a sealed system/component that surrounding the motor stator magnetic core such that a cooling fluid is able to provide heat mitigation functionality during the operation of the AC induction motor, referred to generally as the electric motor. More specifically, illustratively, the cooling management system includes a reservoir configured to hold a cooling fluid, a pump configured to pump the cooling fluid, a heat exchanger configured to interact with the cooling fluid, and a sealed stator fluid jacket. The sealed stator fluid jacket further includes an over molded inner layer that defines an interior channel characterizing a space for the plurality of stator bars and that defines a plurality of flow channels for the flow of the cooling fluid.

A circuitry holder of a resolver's stator for coupling coils of a resolver to an electric circuitry includes a mounting surface with a first contact holder that clamps a first contact for connecting a first terminal of the resolver to the electric circuitry and a second contact holder that clamps a second contact for connecting a second terminal of the resolver to the electric circuitry, wherein a creepage distance between the first contact and the second contact is greater than or equal to 4 mm, the creepage distance is the shortest distance between the first contact and the second contact along the mounting surface of the circuitry holder, the creepage distance for avoiding the generation of short circuits between the first contact and the second contact when the mounting surface is contacting a corrosive fluid.

An assembly and insertion system for assembling and inserting, into a stator pack, a winding having one or more layers of basic conductors is provided. The assembly and insertion system has a circumferential containment of the basic conductors with a set of spaces or slots, and one or more removable inserters of the basic conductors into the circumferential containment, and elements for rotating the circumferential containment about the winding axis. A rotary table is configured to rotate about a table axis to bring the circumferential containment from an assembly position to an insertion position for insertion into the stator pack. The winding is assembled on one side of the rotary table while feeding elements of the stator pack and relative introduction elements of the winding into the stator pack at the insertion position act on the opposite side. A process for assembling and inserting a winding into a stator pack is also provided.

A motor includes a stator core and a stator booster. The stator booster includes a booster back-iron and a plurality of booster teeth. The booster back-iron includes a first end surface that abuts a first end surface of the stator core's back-iron for electrical communication therewith. The booster teeth extend radially inward from the booster back-iron and are spaced apart from one another in a circumferential direction about the central axis to define a plurality of booster slots that align with slots of the stator core. A first end surface of each booster tooth abuts a first end surface of a corresponding tooth of the stator core for electrical communication therewith. An electrically insulating material encapsulates opposite sides of each booster tooth that define the booster slots and a second end surface of each booster tooth that is opposite the first end surface of that booster tooth.

A device includes a stator or a rotor configured to magnetically coupled through an air gap, a plurality of slots distributed along a perimeter of the stator or rotor, a plurality of metal bars each placed into one of the plurality of slots, and an end ring having plurality of openings. Each opening is configured to receive an end of one of the metal bars, and a lock feature is configured to improve a mechanical attachment between the end ring and the metal bar.

A method of manufacturing a semiconductor device is provided, including: forming a first conductive type lightly doped region in the epitaxial layer; forming a first conductive type heavily doped region and a second conductive type heavily doped region in the epitaxial layer on the first conductive type lightly doped region, in which the neighboring first conductive type heavily doped regions are spaced apart by the second conductive type heavily doped region; disposing the mask on the second conductive type heavily doped region; disposing a spacer on a sidewall of the mask; doping a first conductive type dopant in the first conductive type lightly doped region to form an anti-breakdown region; removing the mask and forming a trench extending into the second conductive type heavily doped region, first conductive type lightly doped region and the epitaxial layer; and removing the spacer.

An electric machine may have a stator and a rotor including stacked plurality of electrical steel laminations forming a slot including a first end and opposing sides, the first end defined by a bridge extending between electrical steel on opposing sides of the slot, the bridge being located between the first end of the slot and an outer diameter surface of the rotor and beneath the outer diameter surface of the rotor, the bridge forming a base of a channel open at an outer diameter surface of the rotor.

An induction rotor assembly having conductive bars is provided. The assembly comprises a lamination stack comprising a body having a first end and second ends to define a longitudinal axis. The body has an outer circumferential portion extending from the first end to the second end. The outer portion has a plurality of walls defining open slots formed from the first end through the second end. The assembly further comprises a first ring disposed on the first end and a second ring disposed on the second end. The assembly further comprises a plurality of conductive bars extending between the first and second rings. Each conductive bar is disposed in one of the slots such that the respective conductive bar is in contact with the lamination stack and connects the first and second rings. Each bar comprises an inner portion and a conductive outer skin disposed about the inner portion.