In an electric motor (310), an electrical insulation body (70) includes a first insulation part (71), a second insulation part (72), and a third insulation part (73). The third insulation part includes a first side surface insulation body (731) disposed on a first side surface of a tooth base part (842) of a stator tooth (84) on the first side in a circumferential direction (DX), a second side surface insulation body (732) disposed on a second side surface of the tooth base part of the stator tooth on a second side in the circumferential direction, and a connection part (733) that connects the first side surface insulation body and the second side surface insulation body. The connection part is disposed on the first side in the axial direction with respect to the tooth base part while being in contact with a first insulation part.

A stator assembly, a motor, and a manufacturing method for the stator assembly are disclosed. The stator assembly includes a stator and a main control board arranged at an axial outer end of the stator. The stator is spliced together by a plurality of stator cores. A stator winding is wound around the stator core. The stator winding has a wring terminal. The main control board has at least two spaced-apart connection slots. At least a portion of an inner circumferential wall of the connection slot is provided with a first conductive portion. Each wiring terminal is disposed in a corresponding connection slot and electrically connected to the first conductive portion. The winding connection structure provides a simple process and is easy to install.

A stator assembly, a motor, and a manufacturing method for the stator assembly are disclosed. The stator assembly includes a stator and a main control board arranged at an axial outer end of the stator. The stator is spliced together by a plurality of stator cores. A stator winding is wound around the stator core. The stator winding has a wring terminal. The main control board has at least two spaced-apart connection slots. At least a portion of an inner circumferential wall of the connection slot is provided with a first conductive portion. Each wiring terminal is disposed in a corresponding connection slot and electrically connected to the first conductive portion. The winding connection structure provides a simple process and is easy to install.

A method for folding insulation by providing a component of an electrical machine with a slot extending in the axial direction of the component, with conductors inserted into the slot to form a coil winding and with the insulation inserted into the slot between the slot and the conductors for electrically insulating the conductors from the slot, the insulation with a first and second legs. In at least leg, a longitudinal edge region protrudes radially over the conductors and projects out of the slot in an axial direction. The method includes pre-positioning the part projecting axially out of the slot and protruding over the conductors by moving it towards the center of the slot to create a gap between the longitudinal edge region and the slot flanks and inserting a folding tool into the gap and folding over the longitudinal edge region towards the conductors with the folding tool.

A method for folding insulation by providing a component of an electrical machine with a slot extending in the axial direction of the component, with conductors inserted into the slot to form a coil winding and with the insulation inserted into the slot between the slot and the conductors for electrically insulating the conductors from the slot, the insulation with a first and second legs. In at least leg, a longitudinal edge region protrudes radially over the conductors and projects out of the slot in an axial direction. The method includes pre-positioning the part projecting axially out of the slot and protruding over the conductors by moving it towards the center of the slot to create a gap between the longitudinal edge region and the slot flanks and inserting a folding tool into the gap and folding over the longitudinal edge region towards the conductors with the folding tool.

A stator including: a conductor disposed in a slot formed in a stator core; and an insulator disposed between the slot and the conductor, the stator including a coolant flow path through which a coolant flows between the slot and the conductor. The insulator includes a foam layer that foams when heated inside the slot. The foam layer includes: a foaming-function portion that fills a gap between the slot and the conductor by exhibiting a heat-induced foaming function; and a foaming-function reduction portion that is thinner than the foaming-function portion due to a reduction in the heat-induced foaming function of the foam layer, and that forms a gap between the slot and the conductor through which the coolant can flow.

A stator including: a conductor disposed in a slot formed in a stator core; and an insulator disposed between the slot and the conductor, the stator including a coolant flow path through which a coolant flows between the slot and the conductor. The insulator includes a foam layer that foams when heated inside the slot. The foam layer includes: a foaming-function portion that fills a gap between the slot and the conductor by exhibiting a heat-induced foaming function; and a foaming-function reduction portion that is thinner than the foaming-function portion due to a reduction in the heat-induced foaming function of the foam layer, and that forms a gap between the slot and the conductor through which the coolant can flow.