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A Flux Modulation Stator Structure with Surrounding Windings

A technology of magnetic flux modulation and stator structure, which is applied to the shape/style/structure of winding conductors, the shape/style/structure of magnetic circuits, and static parts of magnetic circuits. and other problems, to achieve the effect of realizing motor performance, reducing fault aggravation, and high system reliability

Active Publication Date: 2021-01-29
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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  • A Flux Modulation Stator Structure with Surrounding Windings
  • A Flux Modulation Stator Structure with Surrounding Windings
  • A Flux Modulation Stator Structure with Surrounding Windings

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as Figure 1 to Figure 3 As shown, this embodiment discloses a wrap-around winding flux-modulating stator structure, including a slotted stator 2, m-symmetric wrap-around windings 1 and a flux-modulating ring 3, where m is the phase number of the motor.

[0045] There are slots on both sides of the slotted stator, including stator yoke 4, stator inner slot 5 and 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.

[0046] The center line of the stator outer slot 6 can be in the same radial direction or form a certain angular deviation with the center line...

Embodiment 2

[0062] According to actual needs, slots of different depths can be opened on the back of the stator.

[0063] Such as Figure 7 As shown, both the present embodiment and the first embodiment adopt the parallel winding method, but the difference between the two lies in that the slotting depth of the outer slot 6 of the stator is different, and the embedding depth of the surrounding winding 1 in the stator is different. The adjustment range of the induced electromotive force is increased, and the fault-tolerant operation capability is also increased.

Embodiment 3

[0065] Such as Figure 8 As shown, both the present embodiment and the first embodiment adopt the parallel winding method, but the difference between the two is that the number of slots in the stator outer slots 6 is different, and the number of single stator outer slots 6 is still smaller than that of the stator inner slots. Number of slots for slot 5. Different numbers of windings are embedded in the outer slot of the stator, which increases the adjustment range of the induced electromotive force and also increases the fault-tolerant operation capability.

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Abstract

The invention discloses a surrounding type winding magnetic flux modulation stator structure. The surrounding type winding magnetic flux modulation stator structure comprises a slotted stator, surrounding type windings and a magnetic flux modulation ring; the slotted stator comprises a stator yoke, stator inner grooves and stator outer grooves; one surrounding type winding is wound at each statorinner groove; the magnetic flux modulation ring is formed by connecting magnetizers and non-magnetizers, wherein the magnetizers and the non-magnetizers are distributed alternately; the magnetic fluxmodulation ring is installed on the back of the slotted stator; the position of the magnetic flux modulation ring is changed through a movement mechanism; and the magnetic flux modulation ring cooperates with the slotted stator to achieve magnetic flux modulation. According to the surrounding type winding magnetic flux modulation stator structure of the invention, a magnetic field generated by thesurrounding windings is utilized; the magnetic flux modulation ring is additionally arranged on the back of the stator; and therefore, a magnetic circuit can be changed. With the surrounding type winding magnetic flux modulation stator structure provided by the scheme of the invention adopted, the induced electromotive force and harmonic content of a motor can be changed, so that the short-time fault-tolerant operation of the motor can be ensured by changing the performance of the motor; and the efficient utilization of the surrounding windings is realized, and the adverse effects of the magnetic flux leakage of the surrounding windings on a casing are reduced.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a surrounding winding magnetic flux modulation stator structure. 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 the rotor, but the wrap-a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/12H02K1/16H02K3/16
CPCH02K1/12H02K1/16H02K3/16
Inventor 邱洪波丁艺伟郑新华刘小梅李伟力杨存祥王明杰张志艳伊然乔建伟刘玉宝时长敏
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY