Stator core with insulation, pressure resistance and high temperature resistance

Abstract

The utility model discloses a kind of stator core with insulation compression resistance high temperature resistance, it includes core body, the core body is composed of multiple nanocrystalline alloy thin strip superposition, both sides on the nanocrystalline alloy thin strip are equipped with composite insulating layer;Composite insulating layer includes: aluminum nitride, polyimide film, organic silicon resin, the bottom layer of composite insulating layer is sprayed with aluminum nitride, the middle layer of composite insulating layer is deposited with polyimide film, the surface layer of composite insulating layer is electrostatically sprayed with organic silicon resin;Through composite insulating layer, in use, avoid in high temperature, high voltage under easy aging, breakage, leading to insulation performance decline, to improve the durability of insulating material.

Description

Technical Field

[0001] This utility model relates to the field of motor stator technology, and in particular to a stator core with insulation, pressure resistance and high temperature resistance. Background Technology

[0002] The stator core is a key component of an electric motor, and its performance has a significant impact on the motor's operating efficiency, reliability, and service life. During motor operation, the stator core needs to withstand electromagnetic forces and mechanical stresses, while also generating heat due to electromagnetic losses. Furthermore, the windings and the core must maintain good insulation.

[0003] However, traditional stator cores still have the following problems:

[0004] 1. In terms of insulation, insulation is generally achieved by coating the iron core surface with ordinary insulating varnish. However, with the increase of motor power and changes in the working environment, ordinary insulating varnish is prone to aging and damage under high temperature and high voltage, resulting in a decrease in insulation performance and causing motor failure.

[0005] 2. Regarding high temperature resistance, when the motor operates under high load for a long time, the temperature of the stator core rises. Existing materials and structures are difficult to dissipate heat effectively. Excessive temperature will reduce the magnetic properties of the core, accelerate the aging of insulation materials, and shorten the service life of the motor. Utility Model Content

[0006] The purpose of this invention is to provide a stator core with insulation, pressure resistance, and high temperature resistance, in order to solve the problems of existing stator cores with insulation, pressure resistance, and high temperature resistance, where ordinary insulating varnish is prone to aging and damage under high temperature and high voltage, resulting in a decline in insulation performance, and existing materials and structures are difficult to dissipate heat effectively. Excessive temperature will cause the magnetic properties of the core to decrease and accelerate the aging of the insulating materials.

[0007] To achieve the above objectives, a stator core with insulation, pressure resistance, and high temperature resistance is provided, including a core body, wherein the core body is composed of multiple nanocrystalline alloy strips stacked together, and a composite insulation layer is provided on both sides of the nanocrystalline alloy strips;

[0008] The composite insulating layer comprises: aluminum nitride, polyimide film, and silicone resin. The bottom layer of the composite insulating layer is coated with aluminum nitride, the middle layer of the composite insulating layer is vapor-deposited with polyimide film, and the surface layer of the composite insulating layer is electrostatically sprayed with silicone resin.

[0009] The nanocrystalline alloy strip uses Fe-based nanocrystalline alloy strip as the magnetic conductive material.

[0010] The aluminum nitride can quickly dissipate heat from the stator core, reducing the temperature rise of the windings.

[0011] The polyimide has high-temperature insulation properties, is resistant to acids, alkalis and organic solvents, and has low moisture absorption.

[0012] The silicone resin has excellent electrical insulation properties, maintaining high insulation resistance and low dielectric loss over a wide temperature range and high humidity, and can be used for moisture-proof coatings.

[0013] The nanocrystalline alloy strip has axial heat dissipation channels, and copper foil heat sinks are inserted into each stack of ten nanocrystalline alloy strips.

[0014] The above-mentioned solution has the following beneficial effects:

[0015] 1. By setting a composite insulation layer, this patent avoids easy aging and damage under high temperature and high voltage, which would lead to a decrease in insulation performance and thus improve the durability of the insulation material.

[0016] 2. This patent improves heat dissipation by setting up axial heat dissipation channels and inserting copper foil heat sinks into every ten layers of nanocrystalline alloy thin strips, thereby avoiding the decrease in magnetic properties of the iron core and the accelerated aging of the insulation material caused by excessively high temperatures. Attached Figure Description

[0017] Figure 1 This is an overall diagram of a stator core with insulation, pressure resistance, and high temperature resistance according to this utility model.

[0018] Figure 2 This is a schematic diagram of a nanocrystalline alloy thin-strip insulation layer for a stator core that is insulating, pressure-resistant, and high-temperature resistant, according to the present invention.

[0019] Figure 3 This is a planar cross-sectional view of a composite insulation layer for a stator core that is insulating, pressure-resistant, and high-temperature resistant, according to this utility model.

[0020] Figure 4 This is a schematic diagram of an axial heat dissipation channel for a stator core with insulation, pressure resistance, and high temperature resistance according to this utility model.

[0021] Legend:

[0022] 1. Iron core body; 2. Nanocrystalline alloy strip; 3. Composite insulation layer; 301. Aluminum nitride; 302. Polyimide film; 303. Organosilicon resin; 4. Axial heat dissipation channel. Detailed Implementation

[0023] Reference Figure 1-4This utility model relates to a stator core with insulation, pressure resistance and high temperature resistance, including a core body 1, which is composed of multiple nanocrystalline alloy thin strips 2 stacked together. Both sides of the nanocrystalline alloy thin strips 2 are provided with composite insulation layers 3. By setting nanocrystalline alloy thin strips 2, it has excellent magnetic properties such as high magnetic permeability, low coercivity and high saturation magnetic induction intensity, and is suitable for electronic devices such as sensors and high frequency transformers. Its good mechanical properties make it strong and tough, flexible in processing and use, and its excellent chemical stability gives it strong corrosion resistance and oxidation resistance.

[0024] The composite insulating layer 3 comprises aluminum nitride 301, polyimide film 302, and silicone resin 303. The bottom layer of the composite insulating layer 3 is coated with aluminum nitride 301, the middle layer of the composite insulating layer 3 is vapor-deposited with polyimide film 302, and the surface layer of the composite insulating layer 3 is electrostatically sprayed with silicone resin 303. By setting the composite insulating layer 3 on the nanocrystalline alloy strip 2, it can reduce eddy current loss, stabilize the magnetic domain structure, significantly improve magnetic properties, act as a physical barrier to isolate corrosive media, prevent electrochemical corrosion, enhance corrosion resistance, provide a high resistivity environment, improve insulation withstand voltage, improve insulation performance, increase flexibility and wear resistance, enhance overall structural strength, and optimize mechanical properties; it can also insulate heat, maintain thermal stability, and widen the operating temperature range, greatly improving the comprehensive performance and reliability of the nanocrystalline alloy strip 2 in multiple fields of application;

[0025] Nanocrystalline alloy strip 2 uses Fe-based nanocrystalline alloy strip 2 (thickness ≤25μm) as the magnetic material. Its high-frequency iron loss (1kHz, 1.0T) is ≤5W / kg. When used in stator cores with insulation, compressive strength and high temperature resistance requirements, it has high saturation magnetic induction intensity, high permeability, low coercivity and good temperature stability. After insulation treatment, it can meet the performance requirements and effectively reduce core loss. New iron-based nanocrystalline alloys such as Fe-Si-BP-Cu-M series alloys, HBNAS, etc. have higher saturation magnetic induction intensity and good processability and economy. When applied to stator cores, they can reduce motor weight, reduce losses and improve efficiency.

[0026] Aluminum nitride 301 can quickly dissipate heat from the stator core, reducing winding temperature rise. In terms of thermal properties, aluminum nitride 301 has a theoretical thermal conductivity as high as 320 W / (m²). K), the actual value can reach 180-320W / (m³). K) enables rapid heat dissipation, reducing device temperature; its coefficient of thermal expansion is close to that of silicon, offering strong compatibility and preventing thermal stress damage; in terms of electrical properties, it has a bandgap of approximately 6.2 eV and an insulation resistance exceeding 10 Ω·cm. 14 Ω cm, with a low dielectric constant, is suitable for insulation of high-frequency, high-power devices.

[0027] Polyimide film 302 exhibits high-temperature insulation, resistance to acids, alkalis, and organic solvents, low moisture absorption, and maintains a volume resistivity of 10 Ω·cm at 250°C. 16 Ω The polyimide film 302 has excellent heat resistance and can be used stably in the range of -269℃ to 400℃. It has good mechanical properties, high tensile strength, flexibility and tear resistance, outstanding electrical insulation properties, and can maintain high insulation resistance and low dielectric constant even under harsh conditions. It also has strong chemical stability, is resistant to acids, alkalis and organic solvents, and has low moisture absorption.

[0028] Organosilicon resin 303 possesses excellent electrical insulation properties, maintaining high insulation resistance and low dielectric loss over a wide temperature range and high humidity. It can be used for moisture-proof coatings. Organosilicon resin 303 is a type of thermosetting polymer material with silicon-oxygen bonds as the main chain and organic groups attached to silicon atoms. It has multiple advantages: in terms of thermal stability, it can be used for a long time in environments ranging from -60℃ to 250℃, and some varieties can withstand short-term temperatures exceeding 300℃. It is not easily decomposed or carbonized at high temperatures. It has excellent electrical insulation properties, maintaining high insulation resistance and low dielectric loss over a wide temperature range and high humidity. It has strong weather resistance, effectively resisting the corrosion of ultraviolet rays and ozone, and does not age easily even after many years of outdoor use. It has good hydrophobic and moisture-proof properties, with a large surface water contact angle, making it suitable for moisture-proof coatings.

[0029] Axial heat dissipation channels 4 are formed on the nanocrystalline alloy thin strip 2. Ten layers of nanocrystalline alloy thin strip 2 are inserted with 0.1mm copper foil heat sinks. The copper foil heat sinks have high thermal conductivity, with pure copper having a thermal conductivity of 401W / (m²). It has a high thermal conductivity (K), can quickly conduct heat; it is lightweight and thin, and can be made into micron-thickness, making it suitable for electronic devices with demanding space requirements; it has strong chemical stability, is resistant to acid and alkali corrosion, and can adapt to a variety of environments.

Claims

1. A stator core with insulating, compressive strength, and high-temperature resistance, characterized in that, It includes an iron core body (1), which is composed of multiple nanocrystalline alloy strips (2) stacked together, and a composite insulation layer (3) is provided on both sides of the nanocrystalline alloy strips (2). The composite insulating layer (3) includes aluminum nitride (301), polyimide film (302), and silicone resin (303). The bottom layer of the composite insulating layer (3) is coated with aluminum nitride (301), the middle layer of the composite insulating layer (3) is vapor-deposited with polyimide film (302), and the surface layer of the composite insulating layer (3) is electrostatically sprayed with silicone resin (303).

2. A stator core with insulation, compressive strength, and high temperature resistance according to claim 1, characterized in that, The nanocrystalline alloy strip (2) uses Fe-based nanocrystalline alloy strip (2) as the magnetic material.

3. A stator core with insulation, compressive strength, and high temperature resistance according to claim 1, characterized in that, The aluminum nitride (301) can quickly dissipate heat from the stator core and reduce the temperature rise of the winding.

4. A stator core with insulation, compressive strength, and high temperature resistance according to claim 1, characterized in that, The polyimide film (302) has high-temperature insulation, resistance to acids, alkalis and organic solvents, and low moisture absorption.

5. A stator core with insulation, compressive strength, and high temperature resistance according to claim 1, characterized in that, The silicone resin (303) has excellent electrical insulation properties, maintaining high insulation resistance and low dielectric loss over a wide temperature range and high humidity, and can be used for moisture-proof coatings.

6. A stator core with insulation, compressive strength, and high temperature resistance according to claim 1, characterized in that, The nanocrystalline alloy strip (2) has an axial heat dissipation channel (4), and each stack of the nanocrystalline alloy strip (2) has ten layers of copper foil heat dissipation sheets inserted.

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