Flat wire winding structure, stator assembly and flat wire motor

Abstract

The invention relates to the field of motors of new energy automobiles, in particular to a flat wire winding structure, a stator assembly and a flat wire motor, the flat wire winding structure comprises each phase winding wound on a stator core, and each phase winding comprises at least two subunits. Each subunit comprises a plurality of first flat wires, second flat wires and third flat wires, wherein two pins of the first flat wires are inserted into the first layer of the stator groove, two pins of the second flat wires are inserted into the second layer, the third layer, the fourth layer, the fifth layer,..., the (L-2) th layer and the (L-1) th layer of the stator groove respectively, and two pins of the third flat wires are inserted into the Lth layer of the stator groove. Subunits in the same phase are connected in series to form a winding, and windings in different phases are connected in parallel to form a flat wire winding structure. According to the flat wire winding structure provided by the invention, the electrical connection between the branch and the neutral point of each phase winding can be realized by adopting a small number of wire shapes, so that the motor performance is better, meanwhile, the connection mode is simplified, the welding production difficulty and production cost of the winding coil are reduced, the batch production is facilitated, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the field of motors for new energy vehicles, in particular to a flat wire winding structure, a stator assembly, and a flat wire motor. Background technique [0002] With the development of new energy vehicle technology, its requirements for the operating performance of the drive motor are getting higher and higher. As a key component of new energy vehicles, the output performance of the drive motor directly affects the efficient operation of the whole machine. Existing driving motors can be divided into round wire motors and flat wire motors according to the different winding structures of the stator windings. Compared with traditional round wire motors, flat wire motors have the advantages of high slot fill rate, high power density, and good temperature performance. [0003] For this reason, the prior art has made many improvements to the flat wire winding structure, but there are still deficiencies: a flat wire stator is pr...

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Problems solved by technology

[0003] For this reason, the prior art has made many improvements to the flat wire winding structure, but there are still deficiencies: a flat wire stator is proposed in the patent document CN200780022091.7 (announcement date is July 22, 2009), but the motor The linearity of the flat wire is more, and the connection between the windings of different phases requires additional conductors, which will further increase the mold cost and process cost;

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