Stator punching sheet of three-phase motor applied to scroll compressor

Abstract

The utility model discloses a stator punching sheet applied to a three-phase motor of a scroll compressor, comprising a stator punching sheet body, the center of the stator punching sheet body is provided with an inner hole, the edge of the inner hole is uniformly provided with a plurality of stator grooves, tooth parts are formed between adjacent stator grooves, and the tooth parts are provided with teeth. The stator punching sheet is characterized in that the outer diameter of the stator punching sheet body is D2, the range of D2 is 137 mm to 141 mm, the inner diameter of the stator punching sheet body is D1, the range of D1 is 70 mm to 74 mm, the width of the tooth part is H, the area of the single stator groove is S, the number of the stator grooves is K, the ratio of the product of the width of the tooth part and the number of the stator grooves to the inner diameter of the stator is P1, P1 = HK / D1, and the value range of P1 is 1.22 mm to 1.62 mm. According to the utility model, the width size and the number of the tooth parts are optimized, so that the magnetic circuit loss and the rotor loss are both at low values, and the consumption of enameled wires is small and the cost is low under the condition that the motor efficiency is the same.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of motor stator lamination, in particular to a kind of stator lamination of three-phase motor applied to scroll compressor. BACKGROUND

[0002] Motor is composed of stator and rotor, stator core is stacked by silicon steel sheet, coil is embedded in slot to generate rotating magnetic field, rotor core is stacked by silicon steel sheet, and squirrel cage is formed by pouring aluminum material in slot to generate torque under rotating magnetic field to drive compressor mechanism to rotate.The slot size of motor lamination, the distribution mode of slot type, the size of inner and outer circle and the cooling channel in the compressor will affect the performance of motor.The slot area of existing motor lamination is small, which leads to high copper loss and aluminum loss, is not conducive to reducing heat generation, causes low motor efficiency, affects the overall performance of compressor, and cannot meet the requirements of high efficiency and energy saving. UTILITY MODEL CONTENTS

[0003] The utility model discloses a kind of stator lamination of three-phase motor applied to scroll compressor, by the width size and quantity optimization of tooth part, make magnetic circuit loss and rotor loss be at low value, reach the case of motor efficiency, minimum enameled wire consumption, lowest cost.

[0004] The utility model provides the following technical scheme: a kind of stator lamination of three-phase motor applied to scroll compressor, including stator lamination body, the center of the stator lamination body is equipped with inner hole, multiple stator slots are uniformly equipped on the edge of the inner hole, the stator slot between adjacent is shaped with tooth part, the outer diameter of the stator lamination body is D2, D2 The range is 137mm to 141mm, the inner diameter of the stator lamination body is D1, D1 The range is 70mm to 74mm, the width of the tooth part is H, the area of single stator slot is S, the number of stator slot is K, the width of tooth part and the product of stator slot number relative to stator inner diameter ratio value is P1, P1=HK / D1, wherein, the value range of P1 is 1.22mm to 1.62mm.

[0005] In some embodiments, the number K of the stator slots is 24.

[0006] In some embodiments, the width H of the tooth part ranges from 4.0mm to 4.4mm.

[0007] In some embodiments, the area S of the stator slot is 70-80mm 2 .

[0008] In some embodiments, six straight edges are formed on the outer edge of the stator lamination body, and the adjacent straight edges are formed with rounded corners.

[0009] In some embodiments, the inner side of the rounded corner is provided with a flow hole, through which the refrigerant is introduced into the stator to cool the stator.

[0010] In some embodiments, the flow hole is a waist hole, which further increases the flow of the refrigerant and improves the cooling efficiency.

[0011] In some embodiments, the distance from the side of the flow hole to the outer edge of the stator punching piece body is W1, and the W1 is 1-2.5mm, so that the motor and the compressor outer wall are in good contact, and there is no resonance and noise.

[0012] In some embodiments, the stator punching piece is applied to a three-phase motor, and the power of the three-phase motor is 1-3.5HP.

[0013] Compared with the prior art, the beneficial effects achieved by the utility model are that: through the optimization of the width size and the number of the tooth part, the magnetic circuit loss and the rotor loss are both at a low value, so that the enameled wire consumption is minimized and the cost is lowest under the condition of the same motor efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0015] Figure 1 It is the structure schematic view of the stator punching piece of the utility model;

[0016] Figure 2 It is the structure schematic view of the stator slot of the stator punching piece of the utility model;

[0017] In the drawing: 1, stator punching piece body;2, stator slot;21, slot;3, inner hole;4, flow hole;5, tooth part. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0019] Please refer to Figure 1 and Figure 2The utility model provides technical scheme: a kind of stator lamination of three-phase motor applied to scroll compressor, including stator lamination body 1, the center of stator lamination body 1 is equipped with inner hole 3, inner hole 3 is used to place rotor assembly, multiple stator slots 2 are evenly equipped on the edge of inner hole 3, the inner side of stator slot 2 is equipped with slot 21, and stator slot 2 is communicated with inner hole 3 by slot 21, and tooth portion 5 is formed between adjacent stator slots 2, and stator lamination body is stacked by silicon steel, and silicon steel part is the passageway for accommodating changing magnetic field, the outer diameter of stator lamination body 1 is D2, the range of D2 is 137mm to 141mm, the inner diameter of stator lamination body 1 is D1, the range of D1 is 70mm to 74mm, the width of tooth portion 5 is H, the area of single stator slot 2 is S, the number K of stator slot 2 in the embodiment is 24, the product of the width of tooth portion 5 and the number of stator slot 2 is relative to stator inner diameter ratio P1, P1=HK / D1, wherein, the value range of P1 is 1.22mm to 1.62mm, H is within 4.0mm to 4.4mm, S is within 70-80mm 2 When, motor efficiency is optimized, by the size optimization of the width H of tooth portion 5, optimal solution is also found in magnetic circuit loss and rotor loss, so that the use amount of enameled wire is small and cost is low under the condition that motor efficiency is same.

[0020] The outer edge of stator lamination body 1 is formed with six straight edges distributed at an included angle, and a fillet is formed between adjacent straight edges, so that the whole of stator lamination body 1 is hexagonal.

[0021] A flow-through hole 4 is formed in the inner side of the fillet, and the flow-through hole 4 is used for passing in refrigerant to cool the stator lamination body 1, so that the stator works at a lower temperature to improve efficiency and service life of the stator.

[0022] The flow-through hole 4 is a waist hole, which increases the flow of the flow-through hole 4 and further improves the cooling efficiency of the stator.

[0023] The distance from the side of the flow-through hole 4 to the outer edge of the stator lamination body is W1, and W1 is 1-2.5mm, and the flow-through hole 4 is arranged at a position such that the flow-through hole 4 has sufficient spacing from the edge of the stator, so that the stator lamination body 1 has high structural strength, the motor and the compressor outer wall are in good contact, there is no resonance and no noise.

[0024] The stator lamination is applied to a three-phase motor, and the power of the three-phase motor is 1-3.5HP, and the motor has the highest efficiency when the three-phase motor is in the power range.

[0025] In the technical solution, when the inner diameter D1 of the stator lamination body is determined, the larger the tooth width H is, the smaller the magnetic potential consumed by the tooth is, the tooth width H is inversely proportional to the area S of the stator slot, the larger the H is, the smaller the S is, the smaller the area of the stator slot is, the less the enameled wire contained in the stator slot is, so that the stator resistance is increased, the loss is increased under the same current, and the efficiency is not improved, therefore, the P1 is arranged in the appropriate range, the efficiency of the motor is improved, and the loss and the cost of the enameled wire are reduced.

[0026] In some specific solutions

[0027] As shown in the above table, the highest two efficiencies are 89.6% and 89.7%, that is, the solutions 1 and 2, at this time, the P1 is in the range of 1.22mm to 1.62mm, although the other values of the solution 3 are in the range, the P1=1.20 is not in the numerical range of 1.22mm to 1.62mm, the efficiency of the solution 3 is obviously lower than that of the solutions 1 and 2, the P1 of the solution 4 is 1.64, which is also not in the numerical range of the P1, therefore, the efficiency of the solution 4 is also obviously lower than that of the solutions 1 and 2, therefore, when the P1 is in the range of 1.22 to 1.62, the D1 is in the range of 70mm to 74mm, the D2 is in the range of 137mm to 141mm, the H is in the range of 4.0mm to 4.4mm, and the S is in the range of 60 to 80mm 2 , the efficiency of the solution is high.

[0028] Finally, it should be noted that: the above only describes preferred embodiments of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A stator lamination for a three-phase electric motor of a scroll compressor, comprising a stator lamination body, a central hole being formed in the center of the stator lamination body, a plurality of stator slots being uniformly formed on the edge of the central hole, and a tooth portion being formed between adjacent stator slots, characterized in that: The outer diameter of the stator lamination body is D2, D2 ranges from 137mm to 141mm, the inner diameter of the stator lamination body is D1, D1 ranges from 70mm to 74mm, the width of the tooth part is H, the area of a single stator slot is S, the number of the stator slots is K, the product of the width of the tooth part and the number of the stator slots relative to the inner diameter of the stator is P1, P1=HK / D1, wherein the value range of P1 is 1.22mm to 1.62mm.

2. A stator lamination for a three-phase electric machine for use in a scroll compressor according to claim 1, characterized in that: The number of the stator slots K is 24.

3. A stator lamination for a three-phase electric motor for use in a scroll compressor according to claim 1, characterized in that: The width of the tooth part H ranges from 4.0 to 4.4mm.

4. A stator lamination for a three-phase electric motor for use in a scroll compressor according to claim 1, characterized in that: The area S of the stator slot is 70-80 mm 2 .

5. A stator lamination for a three-phase electric motor for use in a scroll compressor according to claim 1, characterized in that: Six straight edges are formed on the outer edge of the stator lamination body at an included angle, and a round corner is formed between adjacent straight edges.

6. A stator lamination for a three-phase electric machine for use in a scroll compressor according to claim 5, characterized in that: A flow-through hole is formed on the inner side of the round corner.

7. A stator lamination for a three-phase electric machine for use in a scroll compressor according to claim 6, characterized in that: The flow-through hole is a waist hole.

8. A stator lamination for a three-phase electric machine for use in a scroll compressor according to claim 6, characterized in that: The distance from the side of the flow-through hole to the outer edge of the stator lamination body is W1, and W1 is 1-2.5mm.

9. A stator lamination for a three-phase electric motor for use in a scroll compressor according to claim 1, characterized in that: The stator lamination is applied to a three-phase motor, and the power of the three-phase motor is 1-3.5HP.

Images