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Stator structure with self-adaptive magnetic field correction capability

A stator structure, self-adaptive technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit, magnetic circuit static components, etc., can solve the problem of inability to automatically correct the fault magnetic field, low winding utilization, and inability to adapt to and other problems, to achieve the effect of automatically correcting the faulty magnetic field and improving the ability of fault-tolerant operation.

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

[0009] 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 winding utilization and adverse effects of winding flux leakage, and it is also impossible to realize automatic fault correction magnetic field

Method used

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  • Stator structure with self-adaptive magnetic field correction capability
  • Stator structure with self-adaptive magnetic field correction capability
  • Stator structure with self-adaptive magnetic field correction capability

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as Figure 1 to Figure 7As shown, this embodiment discloses a stator structure with adaptive magnetic field correction capability, including a bidirectional slotted stator 2, m-symmetrical wraparound windings 1 and an adaptive magnetic field correction ring 3, where m is the phase of the motor number.

[0038] There are slots on both sides of the two-way 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 slots 6 are slotted on the back of the stator, and the number of the stator outer slots 6 is equal to 2pmk. The stator outer slots 6 are radially outwardly opened, and are also slotted at equal intervals in the circumferential direction. Among them, p is the number of pole pairs of the motor, and k is a positive integer.

[0039] The center line of the...

Embodiment 2

[0054] According to actual needs, slots of different depths can be opened on the back of the stator.

[0055] Such as Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the slot depth of the stator outer slot 6 is different, and the wrap-around winding 1 is embedded in the slot with different depth of the stator outer slot, which increases the adjustment range of the induced electromotive force, thereby increasing Correction effect.

Embodiment 3

[0057] Such as Figure 9 As shown, the difference between the present embodiment and the first embodiment is that the number of correction teeth is increased by 7, and the adjustment range of the induced electromotive force is increased, thereby increasing the correction effect.

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Abstract

The invention discloses a stator structure with a self-adaptive magnetic field correction capability. The stator structure comprises a bidirectional slotted stator, m-phase symmetric surrounding windings and a self-adaptive magnetic field correction ring. The self-adaptive magnetic field correction ring comprises a ring body made of a non-magnetic material. An even number of conductive guide barsare embedded into the ring body and symmetrically distributed in the ring body, and the guide bars are connected in series through intermittent end ring sections distributed at the two axial ends of the ring body in a staggered mode. Correction teeth made of a magnetic conductive material are arranged on the inner side of the ring body. The self-adaptive magnetic field correction ring is arrangedand installed on the back of the bidirectional slotted stator. The self-adaptive magnetic field correction ring remains stationary when the motor operates normally, and after the motor breaks down, the self-adaptive magnetic field correction ring can automatically locate a winding at a strong magnetic field according to a distorted magnetic field and modulate the distorted magnetic field. According to the invention, a fault magnetic field can be automatically positioned and corrected, self-adaption is realized without an external control mechanism, and the fault-tolerant operation capability of the motor is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a stator structure with adaptive magnetic field correction capability. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K21/02
CPCH02K1/165H02K21/028
Inventor 邱洪波邹旭田王明杰王坤张钰昆刘小梅李伟力张志艳丁艺伟乔建伟刘玉宝时长敏
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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