Stator, electric motor, compressor and vehicle

A stator comprising:

• a stator core comprising a plurality of tooth portions distributed along a circumferential direction of the stator core and forming stator slots between each pair of adjacent tooth portions of the tooth portions;
• windings wound around the tooth portions and extending into the stator slots;
• first insulators at least partially disposed between each pair of adjacent windings of the windings;
• and
• second insulators, separate from the first insulators, arranged in the stator slots and comprising protrusions,
• wherein:
• the first insulators comprise respective first insulation portions portion and second insulation portions connected to each other and to respective windings;
• in a cross-section perpendicular to an axial direction of the stator core, the first insulators are u-shaped and a length of the first insulation portion is greater than a length of the second insulation portion;
• the protrusions are disposed between the first insulation portions and the second insulation portions;
• at least parts of the second insulators extend along slot walls of the stator slots;
• and
• at least parts of the windings are connected to the tooth portions by the second insulators.