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Motor stator

A motor stator and stator slot technology, applied in the shape/style/structure of the winding insulation, the shape/style/structure of the magnetic circuit, the static parts of the magnetic circuit, etc., can solve problems such as short circuit, and achieve the heat generation will not increase , the slot full rate does not decrease, and the effect of maintaining high-performance output

Inactive Publication Date: 2019-06-28
HYCET E DRIVE TECH HEBEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 2 As shown, there are two gaps 6 at the head and tail of the S-shaped slot insulating paper. It has been tested and verified that when the voltage exceeds 1500V, the winding coil 2 and the stator core 1 will discharge through the air at the gap 6, resulting in a short circuit.
like image 3 As shown, similarly, there is a gap 6 between the first and last ends of the C-shaped slot insulating paper. When the voltage exceeds 1500V, the winding coil 2 and the stator core 1 will discharge through the air at the gap 6, resulting in a short circuit.

Method used

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Effect test

no. 1 example

[0045] Figure 5 It is a schematic diagram of the motor stator with S-slot insulating paper according to the first embodiment of the present invention; Image 6 for Figure 5 An enlarged view of the stator slots of the motor stator. Such as Figure 5 with Image 6 As shown, the first embodiment of the present invention provides a motor stator, which includes a stator core 1, a multilayer winding coil 2 and an S-slot insulating paper 3. The stator core 1 is formed with a plurality of stator slots 4, The winding coil 2 is inserted in each stator slot 4, and the S-slot insulating paper 3 is wrapped outside the winding coil 2. The S-slot insulating paper 3 is respectively formed with extensions 31 at both ends, and the extensions 31 are insulated from the S-slots The paper 3 overlaps itself, and two opposite side walls of the stator slot 4 are respectively provided with grooves 41 for accommodating corresponding extensions 31, and the extensions 31 basically fill the grooves 41.

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no. 2 example

[0053] Figure 7 It is a schematic diagram of a motor stator with C-slot insulating paper according to the second embodiment of the present invention; Figure 8 for Figure 7 An enlarged view of the stator slots of the motor stator. Such as Figure 7 with Figure 8 As shown, the second embodiment of the present invention provides a motor stator, including a stator core 1, a multilayer winding coil 2 and a C-slot insulating paper 3. The stator core 1 is formed with a plurality of stator slots 4, The winding coil 2 is inserted in each stator slot 4, the C-slot insulating paper 3 is wrapped outside the winding coil 2, and one end of the C-slot insulating paper 3 is formed with an extension 31, which is connected to the C-slot insulating paper 3. The other end overlaps, and a groove 41 for accommodating the extension part 31 is opened on one side wall of the stator slot 4, and the extension part 31 basically fills the groove 41.

[0054] The extension 31 of one end of the C-slot insu...

no. 3 example

[0061] Such as Figure 4 As shown, the shape of the O-slot insulating paper 3 is the letter O, and one O-slot insulating paper 3 wraps all four-layer winding coils 2 at the same time. Each stator slot 4 is provided with an O-slot insulating paper 3, right The winding coil 2 is insulated from the stator core 1. However, the four-layer winding coils 2 inside the same O-slot insulating paper 3 are not insulated and isolated because the winding coils 2 themselves are coated with an insulating layer on the surface, and they are not insulated and isolated regardless of the same phase or different phases.

[0062] See Figure 4 The existing O-groove insulating paper 3 overlaps the end and end of the opening position of the slot (the radially innermost side of the stator core 1), and the risk of discharge short circuit is relatively small. However, the overlapping portion of the slot opening position will occupy a certain space (effective area) of the stator slot 4, resulting in that the...

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Abstract

The present invention provides a motor stator. The motor stator comprises a stator core, a multi-layer winding coil and an S-shaped groove insulation paper, a plurality of stator slots are formed on the stator core, the multi-layer winding coil penetrates the internal portions of the stator slots, the multi-layer winding coil is wrapped with the S-shaped groove insulation paper, extension portionsare respectively formed at the head and tail ends of the S-shaped groove insulation paper, the extension portions and the S-shaped groove insulation paper itself are overlapped, the two opposite sidewalls of the stator slots are respectively provided with grooves holding the corresponding extension portions, and the grooves are basically filled with the extension portions. The motor stator can avoid discharge of the winding coil and the stator core through the air on the premise of not reducing the copper space factor of the motor so as to avoid short circuit.

Description

Technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a motor stator of an electric vehicle. Background technique [0002] With the development of electric vehicles, the power and torque density of the drive motor is required to increase, and the volume of the motor needs to be as small as possible. This poses a great challenge to the development of the motor. High-performance motors are the ultimate goal of the current industry. aims. Hairpin motors have become the current mainstream development trend with an ultra-high slot full rate. The slot full rate can even be increased by 50%. The increase in the slot full rate can greatly reduce current density, heat generation and temperature rise, and increase the torque density of the motor by nearly 50%. . However, the winding coil of the Hairpin motor adopts a plug-in wire embedding process, and the slot insulation paper needs to be pressed. The slot insulation paper itself has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/16H02K3/34
Inventor 何丽娜孟祥军李义兵赵天旭刘思臣
Owner HYCET E DRIVE TECH HEBEI CO LTD
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