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Permanent magnet motor stator multi-phase winding

A technology of permanent magnet motor and phase winding, which is applied to the shape/style/structure of the winding conductor, which can solve the problems of peak power reduction, motor steady-state temperature rise, and poor heat dissipation of the motor, so as to achieve small resistance loss and improve The effect of power factor and convenient voltage adjustment

Pending Publication Date: 2020-03-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the smaller the volume of the motor and the higher the slot full rate, the worse the heat dissipation capability of the motor, which will lead to an increase in the steady-state temperature of the motor and a decrease in the output peak power.

Method used

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  • Permanent magnet motor stator multi-phase winding
  • Permanent magnet motor stator multi-phase winding
  • Permanent magnet motor stator multi-phase winding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 1 to Figure 7 , the multi-phase winding of the stator of the permanent magnet motor, each phase is formed by connecting one coil or multiple coils,

[0040]Each of the coils includes a head-end element and an end element, the head-end element is a double-layer conductor element, the end element is a single-layer conductor element, and there is also a connection between the head-end element and the end element A plurality of double-layer conductor elements; the double-layer conductor element consists of two upper and lower layers of conductors that are respectively covered with an insulating medium, and an interlayer insulating medium can be arranged between the upper and lower layers of outer-insulated conductors as required, and the single-layer The conductor element is composed of a single-layer conductor and an outer insulating dielectric material covering it;

[0041] From the head end element, the upper layer conductors in all double-layer conductor el...

Embodiment 2

[0044] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0045] The multi-phase is greater than or equal to 3 phases.

[0046] Each phase consists of multiple coils connected in series or parallel.

[0047] In the double-layer conductor element, each layer of conductor is composed of a single conductor wrapped with an insulating dielectric material.

[0048] In the double-layer conductor element, each layer of conductors, that is, the upper layer conductor or the lower layer conductor, is composed of a single or two parallel conductors wrapped with insulating materials.

[0049] In the terminal element of the single-layer conductor element, the single-layer conductor is composed of a single conductor wrapped with an insulating material.

[0050] In the single-layer conductor element, the single-layer conductor may be composed of two parallel-connected conductors covered with insulating material.

[0051] For the double-layer c...

Embodiment 3

[0053] In this embodiment, a permanent magnet motor stator multi-phase winding, each phase is formed by connecting one coil or multiple coils, wherein each coil is such as figure 1 As shown, it includes a head end element 1 and an end element 3, and several intermediate elements 2 are connected between the head end element 1 and the end element 3. Both the head end element 1 and the middle element 2 are double-layer conductor elements, and the end Element 3 is a single-layer conductor element.

[0054] Wherein, the double-layer conductor element includes a conductor inner core and an outer insulating material covering the inner core, and the inner core is composed of upper and lower layers of conductors and an interlayer insulating dielectric material arranged between the upper and lower layers of conductors. As an example, figure 2 a and figure 2 b shows schematic diagrams of two different structures of the double-layer conductor element.

[0055] figure 2 In a, the do...

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Abstract

The invention discloses a permanent magnet motor stator multi-phase winding. In the multi-phase winding, each phase winding is formed by connecting one coil or a plurality of coils; each coil comprises a head end double-layer conductor element, a tail end single-layer conductor element and a plurality of middle double-layer conductor elements arranged between the head end double-layer conductor element and the tail end single-layer conductor element; the upper layer (or lower layer) conductors of all the double-layer conductor elements are connected in sequence through end part conductors; thedouble-layer conductor elements are connected with the end element and then reversely connected with the lower-layer (or upper-layer) conductors of all the double-layer conductor elements, each element corresponds to one stator slot, an insulating medium is arranged between the upper-layer conductor and the lower-layer conductor of the double-layer conductor element of the same stator slot, and the number of the stator slots spanned by the adjacent elements in the same coil is the same. The winding provided by the invention has the advantages of small leakage reactance, small conductive resistance, small heating loss and the like, and has important significance for improving the power factor, efficiency and power density of the motor. The coil topology can be extended and expanded according to the number of stator slots. The permanent magnet motor is especially suitable for multi-pole and multi-phase permanent magnet motors.

Description

technical field [0001] The invention relates to the field of motors or generators, in particular to a stator multi-phase winding of a permanent magnet motor. Background technique [0002] Today, in advanced industrial and energy fields, it is desirable to use motors or generators with smaller volume, lighter weight and higher efficiency, which means that the motor is required to have a higher power density (referring to the output on the motor shaft per unit volume). rated power) or torque density (referring to the rated torque output on the motor shaft per unit volume). Compared with asynchronous motors, permanent magnet motors have advantages in efficiency and power density, which has become a development trend in the field of industrial and transportation energy. [0003] The magnetic flux of the traditional permanent magnet motor is distributed in the radial direction, and the teeth providing the stator flux path and the slots for placing the armature winding conductors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/04H02K3/28H02K3/12
CPCH02K3/04H02K3/28H02K3/12
Inventor 徐国卿
Owner SHANGHAI UNIV
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