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Magnetic flux modulation stator structure using axial sectional hysteresis loop

A technology of magnetic flux modulation and axial segmentation, which is applied to the shape/style/structure of the magnetic circuit, the shape/style/structure of the winding conductor, the magnetic circuit, etc., and can solve the problem of low winding utilization, winding flux leakage, and inability to adapt. problems, to achieve the effect of reducing the aggravation of faults, increasing the adjustment range, and improving the scope and ability of application

Active Publication Date: 2020-04-10
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above technical solutions disclose some flux modulation schemes, but none of them can adapt to and solve the problem that half of the windings of the wrap-around winding are located on the back of the rotor, resulting in low utilization of the windings and adverse effects of winding magnetic flux leakage.

Method used

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  • Magnetic flux modulation stator structure using axial sectional hysteresis loop
  • Magnetic flux modulation stator structure using axial sectional hysteresis loop
  • Magnetic flux modulation stator structure using axial sectional hysteresis loop

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Embodiment 1

[0050] Such as Figure 1 to Figure 4 As shown, this embodiment discloses a magnetic flux modulation stator structure using an axially segmented hysteresis loop, including a slotted stator 2, m-symmetrical wrap-around windings 1 and a hysteresis loop 3, wherein m is the number of phases of the motor.

[0051] Both sides of the slotted stator 2 are slotted, including a stator yoke 4 , a stator inner slot 5 and a stator outer slot 6 . The number of slots in the stator inner slot 5 is 2pmk, and the slots in the stator inner slot 5 are slotted at equal intervals in the circumferential direction. The stator outer slot 6 is slotted on the back of the stator, the number of the stator outer slot 6 is less than or equal to 2pmk, and the stator outer slot 6 is a radially outward opening structure. Among them, p is the number of pole pairs of the motor, and k is a positive integer.

[0052] The center line of the stator outer slot 6 can be in the same radial direction or form a certain...

Embodiment 2

[0069] Such as Figure 8 As shown, both the present embodiment and the first embodiment adopt a parallel winding method, but the difference between the two lies in that the hysteresis loops 3 are distributed at unequal intervals.

Embodiment 3

[0071] Such as Figure 9 As shown, both the present embodiment and the first embodiment adopt a parallel winding method, but the difference between them is that the back of the slotted stator 2 has hysteresis loops 3 with different axial lengths.

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Abstract

The invention discloses a magnetic flux modulation stator structure using an axial sectional hysteresis loop. The structure comprises a slotted stator, surrounding type windings and hysteresis loops.The slotted stator comprises a stator yoke, stator inner grooves and stator outer grooves. Each stator inner groove is wound with one surrounding type winding. Each hysteresis loop is formed by connecting hysteresis bodies and non-conductive magnets, and the hysteresis bodies and the non-conductive magnets are distributed alternately. The size and the number of the hysteresis bodies are matched with the number and the positions of the stator outer grooves. One or more hysteresis loops are arranged on the back of the slotted stator in the axial direction to form an axial sectional hysteresis loop structure. The hysteresis loop position is changed through the motion mechanism, and magnetic flux modulation is realized through mutual cooperation and combined action of the hysteresis loop and the stator outer groove. According to the invention, the hysteresis effect of the material is utilized to influence the magnetic circuit of the surrounding winding, so that the harmonic component in the motor is changed.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a magnetic flux modulation stator structure using an axially segmented hysteresis loop. Background technique [0002] Surround windings are mainly used in the field of high-speed motors. High-speed permanent magnet generators have the advantages of small size, low noise, fast dynamic response, high power density, and high efficiency of transmission systems. They have become key power generation equipment for distributed energy supply systems of micro gas turbines. It meets the requirements of miniaturization and integration of micro gas turbine power generation system. The wrap-around windings are respectively wound in the inner slot of the stator and the back of the stator. Using wrap-around windings for high-speed motors can reduce the length of the end of the winding, thereby reducing the axial length of the rotor to achieve the effect of enhancing the mechanical strength of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K3/28H02K21/02
CPCH02K1/165H02K3/28H02K21/028
Inventor 杨存祥邱洪波刘紫阳申永鹏李伟力伊然王明杰张志艳乔建伟刘玉宝时长敏贾宛英
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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