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Stator and motor comprising same

A stator and stator tooth technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of uneven distribution of stator coil losses, low full rate of stator winding slots, and motor heating, etc., to achieve uniform distribution of conductor losses and improve Motor efficiency and the effect of improving the slot full rate

Active Publication Date: 2021-06-18
SHANGHAI ELECTRIC WIND POWER GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the low fullness of stator winding slots in the prior art and the uneven distribution of stator coil losses in the same radial direction The defect that causes serious heating of the motor provides a stator and a motor including the same

Method used

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  • Stator and motor comprising same
  • Stator and motor comprising same
  • Stator and motor comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This embodiment provides a motor, including a stator and a rotor, and an air gap is formed between the stator and the rotor. Such as figure 1 As shown, in this embodiment, a motor with an inner stator and an outer rotor structure is taken as an example, and the rotor 1 is arranged radially outside the stator. In other alternative embodiments, the following stator structure is also applicable to a motor with an outer stator and an inner rotor. In this case, the rotor 1 is arranged on the radial inner side of the stator.

[0073] Such as Figure 1-2 As shown, the stator includes a stator core 3 and a stator winding. The stator core 3 is formed by stacking a plurality of tooth-shaped silicon steel sheets along the axial direction of the stator. The stator core 3 includes a stator yoke 31 and a plurality of stator teeth 32 arranged around the stator yoke 31. One end of the plurality of stator teeth 32 is connected to The stator yoke 31 is connected, and the other end of ...

Embodiment 2

[0085] The structure of the motor in this embodiment is basically the same as that in Embodiment 1, except that the difference between the first winding coil 41 and the second winding coil 42 is different.

[0086] Such as Figure 4 As shown, the coil diameters of the first winding coil 41 and the second winding coil 42 in this embodiment are the same, but the number of windings of the first winding coil 41 is smaller than the number of windings of the second winding coil 42, wherein , The number of parallel coils refers to the number of conductors that are simultaneously wound during the winding process of the winding coil, that is, the number of conductors of the winding coil in the circumferential direction of the stator. Specifically, in this embodiment, the number of parallel windings of the first winding coil 41 is 2, and the number of parallel windings of the second winding coil 42 is 3. In other alternative embodiments, the number of parallel windings of the first win...

Embodiment 3

[0091] The structure of the motor in this embodiment is basically the same as that in Embodiment 1, except that the difference between the first winding coil 41 and the second winding coil 42 is different.

[0092] Such as Figure 5 As shown, the coil diameters of the first winding coil 41 and the second winding coil 42 in this embodiment are the same, but the resistivity of the first winding coil 41 is greater than that of the second winding coil 42 .

[0093] Since the leakage magnetic field formed by the harmonics in the air gap 2 will form a loop with the stator and the rotor 1, the second winding coil 42 closer to the air gap 2 is likely to be induced with more harmonic current, thus causing the second winding coil 42 has more conductor loss, which in turn causes uneven conductor loss of the first winding coil 41 and the second winding coil 42 . This embodiment reduces the conductor loss by reducing the resistivity of the second winding coil 42, the lower the resistivity...

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Abstract

The invention discloses a stator and a motor comprising the same, wherein a stator winding comprises a plurality of winding coils wound on stator teeth, and any winding coil is provided with at least one other winding coil in the radial direction of the wound stator teeth; for a plurality of winding coils in the same radial direction of the stator teeth, the coil diameters of the winding coils are gradually increased and / or the parallel winding number of the coils is gradually increased in the direction from the radial inner sides of the stator teeth to the radial outer sides of the stator teeth, and / or, and the resistivity and / or the insulativity and / or the coil turns of the plurality of winding coils are gradually reduced from the direction close to the stator iron core to the direction far away from the stator iron core. The slot space factor is improved by increasing the coil diameter of the winding coil and / or the parallel winding number of the coils, and the conductor loss of the winding coil is reduced by reducing the resistivity and / or insulativity and / or the number of turns of the coils, so that the heating loss of the motor can be reduced, and the reliability of the motor is improved.

Description

technical field [0001] The invention relates to the field of motors, in particular to a stator and a motor including the same. Background technique [0002] At present, the stator winding in the motor is composed of a plurality of stator coils. The stator coils are usually preformed with good conductors, and then nested and placed in the stator slot of the stator core as a whole. When the external force drives the rotor of the motor to rotate, the magnetic field formed by the excitation components arranged on the rotor passes through the air gap and forms a turn chain with the stator coil, and then induces electric energy in the stator coil to realize energy conversion. Usually, the motor contains multi-phase windings, and the multi-phase windings are led out of the generator and then connected to the matching multi-phase converter to achieve specific control and power conversion requirements. A certain phase winding of the motor is formed by electrical connection of multip...

Claims

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Application Information

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IPC IPC(8): H02K1/16H02K3/12H02K3/28H02K3/34
CPCH02K1/165H02K3/12H02K3/28H02K3/34H02K2213/03
Inventor 李华阳刘军伟钟云龙王嗣翔吴立建
Owner SHANGHAI ELECTRIC WIND POWER GRP CO LTD
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