Stator block, stator and motor

Abstract

The invention relates to the technical field of motors, and discloses a stator block, a stator and a motor. The stator block comprises a splicing block core and a coil, wherein the coil forms a coil winding; the first side winding structure of the coil winding and the second side winding structure of the coil winding are asymmetrically arranged relative to the radial center line X of the splicingblock core; and in the first side winding structure, a first side inclined edge is formed on the connecting line of the radially innermost one turn coil of the other multilayer coil outside the firstpreset layer coil, and the part of the first preset layer coil is not shielded to form a first side straight edge; in the second side winding structure, the outermost coil forms a second side straightedge, the connecting line of the second preset layer coil and the radially innermost one turn coil of the outer other multilayer coil forms a second side inclined edge, the shape is complementary after the two stator blocks forming the stator, avoiding excessive residual space in the tolerance line space between the stator blocks, obviously improving the groove fullness rate of the stator, and further improving the power density of the motor and reducing the volume and the cost of the motor.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator block, a stator and a motor. Background technique [0002] At present, the stator includes a stator core and a stator winding wound on the stator core, and the stator winding is basically formed by winding a winding wire on the stator core by a winding machine. In order to facilitate the winding of the winding machine, the stator is divided into multiple stator blocks, so that the winding machine can wind the wires in the winding slots on each stator block, and then connect the stator blocks circumferentially to Form a monolithic stator. [0003] In practice, the slot fullness of the winding of the stator block is limited by the winding machine, the winding sequence and the wire diameter. Usually, in order to facilitate the winding of the winding machine, the winding parts on both sides of the winding slot are generally along the slot The center line is arranged symmetr...

AI Technical Summary

Problems solved by technology

[0003] In practice, the slot fullness of the winding of the stator block is limited by the winding machine, the winding sequence and the wire diameter. Usually, in order to facilitate the winding of the winding machine, the winding parts on both sides of the winding slot are generally along the slot The center line is arranged symmetrically, and the winding machine winds the wires layer by layer to avoid jumping wires, which leaves a lot of space in the winding groove. In this way, when a plurality of such stator blocks are connected to form a stator, such a Due to the low slot full rate of the stator, it will lead to low power density of the motor, severe heat generation, and excessive volume.

[0004] However, if you forcibly use the remaining space to wind the wires on this basis, it is impossible to avoid the wire jumping of the winding machine, and the wires of the winding machine will have problems such as poor insulation of the stator winding, uneven winding, inconsistent coil resistance and inductance, etc., which will eventually lead to The motor torque ripple is too large, the control accuracy is too poor, etc.

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