Stator winding construction and winding method for slotless motor stator winding, and stator construction with the winding construction

Abstract

The present invention provides a slotless motor stator winding structure, wherein the winding is winded by wire groups; the wire groups are twisted into helical shape by a plurality of paralleled insulated wires. The present invention also provides a slotless motor stator structure which comprises a stator core and windings fixed inside the iron core; the windings are mode by winding, pressing and curling a plurality of wire groups; each wire group is composed by a plurality of paralleled insulated wires and is twisted into helical shape. The slotless motor stator winding structure of the invention can effectively reduce eddy current loss that generated in the windings because the wire groups is twisted by a plurality of paralleled wires with minor diameter in application occasions of heavy current and high rotate speed. At the same time, because a plurality of wires with minor diameter are twisted into wire groups of larger diameter before winding the wires, hence convenient of following operations of wire winding and integer. In addition, a plurality of insulated wires are twisted into helical shape which is beneficial for avoiding generating electric potential difference between different wires, hence prevents bringing in circulation and increasing copper loss.

Description

【Technical field】 [0001] The invention relates to the field of motors, in particular to a stator winding structure of a slotless motor. 【Background technique】 [0002] With the development of power electronics technology, various motors have been widely used in all walks of life. Among them, brushless DC motors are widely used in office automation, home appliances, etc. due to their simple structure, reliable electromagnetic performance, and simple maintenance. field. [0003] At present, most brushless DC motors on the market are slotted motors. The stator of a slotted motor usually includes many regularly distributed teeth and slots positioned radially along its inner periphery, and the teeth and slots extend along the entire axial length of the stator. Through various techniques well known to those skilled in the art, the stator windings are embedded in the slots in a certain phase order. However, such existing slotted motors have problems such as inconvenient winding, ...

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Problems solved by technology

Therefore, when the above-mentioned slotless motor is applied to high current and high speed applications, due to the high magnetic flux density of the magnetic field passing through the coil, the frequency of magnetic flux alternating is high, and the wire is thick, a large eddy current will be generated in the coil loss

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