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Stator of permanent-magnet synchronous motor

A technology for permanent magnet synchronous motors and stators, applied to synchronous machine parts, magnetic circuit static parts, magnetic circuit shape/style/structure, etc., can solve the problems of stator embedded wires, inconvenient wiring, high loss of stator windings, etc., to achieve Reduce cogging torque, facilitate wire embedding, and reduce wiring work

Inactive Publication Date: 2014-06-11
京能新能源科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to better solve the problems of existing permanent magnet synchronous motors with stator embedded wires, inconvenient wiring and high loss of stator windings

Method used

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  • Stator of permanent-magnet synchronous motor
  • Stator of permanent-magnet synchronous motor
  • Stator of permanent-magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one, see figure 1 , figure 1 The stator structure of the motor according to the present invention is shown in , including the stator core 200 and the stator winding 100. In this embodiment, the number of motor phases m is 3, and the stator core has teeth 2001, 2002, 2003 for coil nesting... ..., 2047, 2048, the number of teeth is 48, S=2nm, n is 8; each phase winding is composed of a coil unit, in the present invention, the coil unit a1 is composed of two adjacent teeth (for example: tooth 2001, tooth 2002) Composed of single-tooth half-winding 1 and single-tooth half-winding 2 with the same winding direction; coil unit b1 is composed of half-winding 3 and half-winding 4; ... coil unit c8 is composed of half-winding 47 and 48, each of which The ends of the two single-tooth half-winding 1 and half-winding 2 in the unit are connected as a whole, and the two are wound at one time during winding, that is, each coil unit is wound at one time by two Composed of s...

Embodiment 2

[0023] Embodiment two, see image 3 , another specific connection method of 8 three-phase winding units is given in this embodiment, the first group of three-phase winding units (a1, b1, c1) and the second group of 8 three-phase winding units The three-phase winding units (a2, b2, c2) are connected in series, the third group of three-phase winding units (a3, b3, c3) and the fourth group of three-phase winding units (a4, b4, c4) are connected in series, the fifth group and the sixth group The groups are connected in series, and the seventh group and the eighth group are connected in series, thus forming four sets of independent three-phase windings. to combine figure 1 , image 3Take the first group as an example to illustrate its connection method. For clarity of description, the left end of the coil unit a1 is defined as the head end, and the right end is defined as the end, and the adjacent end of the coil unit b1 and a1 is defined as the head end, and the other end is th...

Embodiment 3

[0024] Embodiment three, see Figure 4 In this embodiment, another specific connection method of 8 groups of three-phase winding units is given. The first, second, third and fourth groups of three-phase winding units (a1, b1, c1), (a2, b2, c2), (a3, b3, c3); (a4, b4, c4) are connected in series as an independent three-phase winding (A1, B1, C1), and the fifth, sixth, seventh and eighth three-phase winding units ( a5, b5, c5), (a6, b6, c6), (a7, b7, c7); (a8, b8, c8) are connected in series as an independent three-phase winding (A2, B2, C2); the first Take a three-phase winding (A1, B1, C1) as an example: the first end of the coil unit a1, the end of b1, and the first end of c1 in the three-phase winding unit (a1, b1, c1) are respectively connected to the lead-out end, and the end of a1 Connect the end of the coil unit a2 of the three-phase winding unit (a2, b2, c2); the head end of the coil unit b1 is connected to the head end of the coil unit b2, the end of the coil unit c1 ...

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Abstract

The invention relates to a stator of a permanent-magnet synchronous motor. The stator comprises a stator iron core and a stator winding, and is characterized in that: the tooth number S of the stator iron core is equal to 2nm, m is a phase number, and n is an even number which is more than or equal to 2; the space width ratio of the stator is 1, the stator winding is a multiphase winding, and each phase of the winding at least consists of one coil unit; and the coil unit consists of single-tooth half windings in the same winding direction on two adjacent teeth, the output ends of the single-tooth half windings on the two adjacent teeth of the coil unit are connected, and the leading wire directions of the single-tooth half windings on the two adjacent teeth of every two adjacent coil units are the same. The invention has the advantages of simple wire winding process, short ends of the windings, low loss, high efficiency and low cost.

Description

technical field [0001] The invention relates to a motor stator, in particular to a permanent magnet synchronous motor stator suitable for low rotation speed. Background technique [0002] The stator of existing motors is generally laminated with silicon steel sheets to form a stator core, and the core slots are coils; and the stator windings generally use distributed windings, which have the problems of complex off-line, long manufacturing cycle, and high cost. For direct drive motors and motors for wind power generation, in order to reduce the speed, it is necessary to choose a multi-pole rotor. Therefore, three-phase motors need to have more stator slots and windings (at least 4.8 to 6 times the number of poles). The installation and connection of so many windings is very time-consuming work. [0003] For example: CN201466836U discloses a three-phase concentrated winding motor with redundant windings, the number of stator slots is even and the ratio of the number of stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/02H02K1/14H02K3/28H02K1/16
Inventor 汉斯·鲁道夫·西格里斯特史人杰
Owner 京能新能源科技(上海)有限公司