TWM621912U - Rotor and electrical machine - Google Patents

Abstract

A rotor and a motor, comprising a rotor iron core, the center of which is provided with a shaft hole for installing a motor spindle, the rotor iron core is equally divided into a plurality of magnetic force blocks with the shaft hole as the center, and each of the magnetic force blocks is divided into a plurality of magnetic blocks. The outer contour has an arc line segment, two connecting segments and a concave segment connected in sequence along the circumferential direction; the arc line segment and the connecting segment are composed of different circle centers and different arc radii, so that the overall outer contour of the rotor presents an uneven circle The non-circular structure can optimize the air-gap magnetic flux density distribution, make the air-gap magnetic flux approach a sine wave, improve the cogging torque and torque ripple, and the concave section can limit the magnetic flux flow path, so that the The magnetic flux leads to the ideal magnetic circuit, which reduces the occurrence of magnetic flux leakage and optimizes the air-tight magnetic flux density distribution; thereby, it can greatly reduce the torque ripple and cogging torque, improve the noise and improve the stability of the motor output torque.

Description

Rotor and motor

The new model relates to the technical field of compressors, in particular to a rotor and a motor.

According to press, the existing rotary compressor mainly includes the following components: exhaust pipe, casing, motor (stator, rotor), transmission shaft, upper bearing, muffler cover, compression unit (cylinder block, piston), lower bearing, bottom cover , outlet pipe, reservoir and inlet pipe. The basic working principle of the compressor is as follows: When the compressor is energized, the stator generates a magnetic field, which makes the rotor rotate, drives the transmission shaft, and makes the piston move eccentrically in the cylinder, thereby compressing the low-temperature and low-pressure gas refrigerant into high-temperature and high-pressure gas. , and is discharged from the cylinder body to the casing through the muffler cover. After passing through the cut edge on the outer side of the stator and the gap between the rotors, it is discharged into the refrigeration cycle system through the outlet pipe.

As we all know, permanent magnet synchronous motors are widely used in household appliances such as air conditioner compressors because of their high efficiency. The more common method to improve the energy efficiency of the motor is to increase the air gap magnetic field of the motor. However, when this method is adopted, the harmonics of the air gap magnetic field will also become larger, which will cause the motor and the compressor to generate noise and vibration.

In view of this, the creator of the present invention has devoted himself to the research and application of the theory, and tried his best to solve the above-mentioned problems, which is the goal of the creator's improvement.

Therefore, the purpose of the present invention is to provide a method that greatly reduces torque ripple and cogging torque, improves the air gap flux waveform and reduces flux leakage, helps reduce vibration noise and improves the stability of the output torque of the motor, In order to solve the existing problems of the above-mentioned prior art problem.

In order to achieve the purpose of the previous disclosure, the present invention proposes a rotor, which includes a rotor iron core, the rotor iron core is a cylindrical body with a predetermined length, and a shaft hole for installing a motor mandrel is arranged at the center of the rotor iron core, and the shaft hole passes through. At both ends of the rotor core, it is characterized in that:

The rotor core is evenly divided into a plurality of magnetic blocks with the shaft hole as the center, and the outer contour of each of the magnetic blocks has an arc segment, two connection segments and a concave segment connected in sequence along the circumferential direction; the arc segments are adjacent to each other. Between the two connecting sections, the concave section is adjacent to the first connecting section; the arc radius of the arc segment is R1, the arc radius of the connecting section is R2, the concave section and the center of the rotor core The value of the distance between the points is d3; wherein the arc line segment and the connecting segment are composed of different circle centers and different arc radii, so that the overall outline of the rotor presents a non-circular structure.

Preferably, a first imaginary line is defined, the first imaginary line extends from the center point of the rotor core through the center point of the arc segment, and the center point of the arc segment is located on the first imaginary line; wherein the arc segment The distance between the center point of the rotor core and the center point of the rotor core is d1, and the distance between the center point of the rotor core and the top of the arc segment is d2, and d1<d2.

Preferably, the distance between the center point of the arc segment and the center point of the rotor core is d1; the arc radius of the connecting segment is R2, and d1<R2 is satisfied.

Preferably, the arc radius of the connecting segment is R2, the distance between the center point of the rotor core and the top of the arc segment is d2, and the distance between the concave segment and the center point of the rotor core is d2. The value is d3, and d2≧R2>d3 is satisfied.

Preferably, the rotor further includes a plurality of magnets, and the magnets are respectively disposed at each magnetic block of the rotor core.

Preferably, each of the magnetic blocks is provided with a magnet slot, the magnet slot penetrates through the bottom surface of the magnetic block along the top surface of the magnetic block, and the magnet slot is used for the magnet to be installed.

<5。 Preferably, a second imaginary line is defined, and the second imaginary line extends from the center point of the rotor core through the center point of the concave section; wherein the bottom end of the concave section is designed as a straight line, and the straight line at the bottom end of the concave section The length is a1, and the distance between the midpoints of the broad sides between the two magnets is a2, which satisfies the following relationship: 1<

<5.

Preferably, the shape of the recessed segment is any shape.

Preferably, the shape of the magnet slot of each of the magnetic blocks is either a strip shape or a V shape.

According to another aspect of the present invention, a motor is also provided, characterized in that it includes:

a stator; and

A rotor, the rotor is the above-mentioned rotor, the rotor is arranged inside the stator, and the rotor can rotate relative to the stator.

It can be seen from the above structure that the beneficial effects of the new model are as follows:

1. A rotor is provided including a rotor core and a magnet. Wherein, the rotor core is divided into a plurality of magnetic blocks with the shaft hole as the center, each of the magnetic blocks is provided with a magnet slot for the magnet to set and form a magnetic pole, and the outer contour of each of the magnetic blocks is arranged in sequence along the circumferential direction It has a connected arc segment, two connecting segments and a concave segment; the arc segment is adjacent to the two connecting segments, the concave segment is adjacent to the one connecting segment, and extends through the center point of the rotor core The center point of the arc segment defines a first imaginary line. The center point of the arc segment is located on the first imaginary line, but is not concentric with the center point of the rotor core, so that the arc segment is different from the connecting segment. The center of the circle and different arc radii are formed, so that the outer contour of the rotor presents a non-circular structure as a whole. In this way, the use of the non-circular structure can optimize the air-gap magnetic flux density distribution, make the air-gap magnetic flux approach a sine wave, and improve the Cogging torque and torque ripple.

<5，減少該凹陷段閉合發生，如此一來，位於第二假想線上的凹陷段可限縮磁通流通路徑，使磁通往理想磁路流通，減少漏磁發生與優化氣密磁通密度分布。 2. The provided rotor includes a rotor core and a magnet. Wherein, the rotor core is divided into a plurality of magnetic blocks with the shaft hole as the center, each of the magnetic blocks is provided with a magnet slot for the magnet to set and form a magnetic pole, and the outer contour of each of the magnetic blocks is arranged in sequence along the circumferential direction It has a connected arc segment, two connecting segments and a concave segment; the arc segment is adjacent to the two connecting segments, the concave segment is adjacent to the one connecting segment, and extends through the center point of the rotor core The center point of the concave segment defines a second imaginary line, wherein the bottom end of the concave segment is designed as a straight line, the length of the straight line at the bottom end of the concave segment is a1, and the distance between the midpoints of the broad sides between the two magnets is a2, which satisfies the following relation: 1<

<5, reduce the occurrence of closing of the concave segment. In this way, the concave segment located on the second imaginary line can restrict the magnetic flux flow path, so that the magnetic flux can flow to the ideal magnetic circuit, reduce the occurrence of magnetic leakage and optimize the airtight magnetic flux density distributed.

1: Rotor

11: Rotor core

110: Shaft hole

111: Magnetic Block

1111: Magnet slot

112: Arc segment

113: Connection segment

114: Recessed segment

12: Magnets

2: Stator

a1: length

a2: distance

D: The first imaginary line

d1: spacing

d2: spacing

d3: spacing

Q: The second imaginary line

R1: Arc radius

R2: Arc radius

Figure 1 is a top view (1) of the new rotor.

Fig. 2 is a partial enlarged view of Fig. 1 of the new model.

Figure 3 is a top view (2) of the new rotor.

Figure 4 is a top view of the new motor.

In order to understand the features, content and advantages of the present invention and the effects it can achieve, the present invention is described in detail below in the form of an embodiment in conjunction with the drawings, and the drawings used therein are only for illustration purposes. It is not necessarily the actual proportion and precise configuration of this new model after the implementation of this model and the auxiliary instructions. Therefore, the relationship between the proportion and configuration of the attached drawings should not be interpreted or limited to the scope of rights of the new model in actual implementation.

The advantages, features, and technical methods of the present invention will be described in more detail with reference to the exemplary embodiments and the accompanying drawings to make it easier to understand, and the present invention may be implemented in different forms, so it should not be construed as limited to The embodiments set forth herein, on the contrary, to those of ordinary skill in the art, the embodiments are provided so that the present disclosure will be more thorough, complete and complete to convey the scope of the present invention, and the present invention will only be described as such. Additional Claims Defined.

first embodiment

First, please refer to Figures 1 to 3. Figure 1 is a top view of the new rotor (1), Figure 2 is a partial enlarged view of Figure 1 of the new type, and Figure 3 is a top view of the new rotor (2). ).

The rotor 1 includes a rotor iron core 11, the rotor iron core 11 is a cylindrical body with a predetermined length, and a shaft hole 110 for installing a motor spindle (not shown) is provided in the center of the rotor iron core 11 , the shaft hole 110 penetrates through both ends of the rotor iron core 11 , that is, the upper end and the lower end of the rotor iron core 11 . The rotor core 11 of the present invention is formed by overlapping a plurality of silicon steel sheets in sequence from bottom to top to form the aforementioned cylindrical body, and an inner hole is formed at the center of each silicon steel sheet to form the aforementioned rotor core 11 and the motor by overlapping. The mandrel (not shown in the figure) fits into the shaft hole 110 .

The rotor core 11 is evenly divided into a plurality of magnetic blocks 111 with the shaft hole 110 as the center, and the outer contour of each magnetic block 111 has an arc segment 112, two connection segments 113 and A recessed segment 114; the arc segment 112 is adjacent to the two connecting segments 113, and the recessed segment 114 is adjacent to the connecting segment 113; the arc radius of the arc segment 112 is R1, and the connecting segment 113 is The radius of the arc is R2, and the distance between the concave section 114 and the center point of the rotor core 11 is d3; wherein the arc segment 112 and the connecting segment 113 are composed of different centers and different arc radii, so that the The outer contour of the rotor 1 presents a non-circular structure as a whole.

Based on the above structure, it is further explained as follows:

In this embodiment, a first imaginary line D is defined. The first imaginary line D extends from the center point of the rotor core 11 through the center point of the arc segment 112 , and the center point of the arc segment 112 is located in the first imaginary line. On the line D, that is, any point on the first imaginary line D, but not concentric with the center point of the rotor core 11; wherein the distance between the center point of the arc segment 112 and the center point of the rotor core 11 The value is d1, the distance between the center point of the rotor core 11 and the top of the arc segment 112 is d2, and d1<d2 is satisfied; in other words, the center point of the arc segment 112 and the center of the rotor core 11 point, the two are in a different state of mind.

In the foregoing, the distance between the center point of the arc segment 112 and the center point of the rotor core 11 is d1, the arc radius of the connecting segment 113 is R2, and d1<R2 is satisfied; in other words, the arc segment 112 The distance between the center point of the rotor core 11 and the center point of the rotor core 11 is d1, and the length of the distance d1 does not exceed the arc radius of the connecting section 113 R2.

Furthermore, the arc radius of the connecting segment 113 is R2, the distance between the center point of the rotor core 11 and the top of the arc segment 112 is d2, the recessed segment 114 and the center point of the rotor core 11 are d2. The value of the distance between them is d3, and d2≧R2>d3; in other words, the distance d2 between the center point of the rotor core 11 and the top of the arc segment 112 is greater than or equal to the arc radius R2 of the connecting segment 113 , and the arc radius R2 of the connecting segment 113 is greater than the distance d3 between the recessed segment 114 and the center point of the rotor core 11 .

In this embodiment, the rotor 1 further includes a plurality of magnets 12 , and the magnets 12 are respectively disposed at each magnetic block 111 of the rotor core 11 ; and a magnet slot 1111 is formed in the magnetic block 111 . , the magnet slot 1111 runs through the bottom surface of the magnetic block 111 along the top surface of the magnetic block 111 , and the magnet slot 1111 is used for the installation of the magnet 12 , and the shape of the magnet slot 1111 of the magnetic block 111 is long Either a strip shape (as shown in Figure 1) or a V shape (as shown in Figure 3).

<5，而該凹陷段114的形狀為任一形狀；換言之，該凹陷段114重點在於其底端為直線設計，而該凹陷段114的兩側面，即兩邊側端其形狀不受限制，其形狀可為平直狀(由底端朝上重直延伸，即底端與兩端之間的角度為90度)、弧狀(如：外弧狀或內弧狀)、傾斜狀(由底端朝上延伸向外傾斜，即底端與兩端之間的角度大於90度；或者由底端朝上延伸向內傾斜，即底端與兩端之間的角度小於90度)或其它形狀之任一者；因此，該凹陷段114可為上述中任一形狀，不侷限單一樣式，而本創作圖式中該凹陷段114的底與兩側端之間的角度為90度，即該凹陷段114為矩形形狀所呈現，在此條件下，避免該凹陷段114呈閉合狀態。 In this embodiment, a second imaginary line Q is defined, and the second imaginary line Q extends from the center point of the rotor core 11 through the center point of the recessed section 114; wherein the bottom end of the recessed section 114 is designed as a straight line, That is, the bottom surface of the concave section 114; and the straight line length of the bottom end of the concave section 114 is a1, and the distance between the two magnets 12 between the midpoints of the broad sides is a2 (as shown in FIG. 2), which satisfies the following relationship formula: 1<

<5, and the shape of the recessed segment 114 is any shape; in other words, the key point of the recessed segment 114 is that its bottom end is designed in a straight line, and the two sides of the recessed segment 114, that is, the two side ends, are not limited in shape. The shape can be straight (extending from the bottom to the top, that is, the angle between the bottom and both ends is 90 degrees), arc (such as: outer arc or inner arc), inclined (from the bottom The end extends upward and slopes outward, that is, the angle between the bottom end and the two ends is greater than 90 degrees; or extends upward from the bottom end and slopes inward, that is, the angle between the bottom end and the two ends is less than 90 degrees) or other shapes Therefore, the recessed section 114 can be any of the above-mentioned shapes, and is not limited to a single pattern, and the angle between the bottom and both sides of the recessed section 114 in the drawing is 90 degrees, that is, the The recessed section 114 has a rectangular shape, and under this condition, the recessed section 114 is prevented from being in a closed state.

Second Embodiment

Please refer to FIG. 4. FIG. 4 is a top view of a new motor. This embodiment provides a motor. The motor includes a stator 2 and a rotor 1. The rotor 1 is the aforementioned rotor 1. Due to the overall structure of the rotor 1 It has been described above, so it will not be repeated here. The rotor 1 is arranged inside the stator 2 , and the rotor 1 can rotate relative to the stator 2 .

In this structure, the rotor core 11 is divided into a plurality of magnetic blocks 111 with the shaft hole 110 as the center. Magnetic poles are formed, and the outer contour of each magnetic block 111 has an arc segment 112 , two connecting segments 113 and a concave segment 114 connected in sequence along the circumferential direction; the arc segment 112 is adjacent to between the two connecting segments 113 , the concave section 114 is adjacent to the connecting section 113 and extends through the center point of the arc segment 112 through the center point of the rotor core 11 to define a first imaginary line D, and, through the rotor core The center point of 11 extends through the center point of the recessed segment 114 to define a second imaginary line Q, the center point of the arc segment 112 is located on the first imaginary line D, but is different from the center point of the rotor core 11 The arc line segment 112 and the connecting segment 113 are formed by different centers and different arc radii, so that the overall outer contour of the rotor 1 presents a non-circular structure. In this way, the use of the non-circular structure can optimize the air-gap magnetic flux. The density distribution makes the air gap magnetic flux approach a sine wave, while improving the cogging torque and torque ripple.

<5，減少該凹陷段114閉合發生，如此一來，位於該第二假想線Q上的凹陷段114可限縮磁通流通路徑，使磁通往理想磁路流通，減少漏磁發生與優化氣密磁通密度分布。 Furthermore, the center point of the rotor core 11 extends through the center point of the concave section 114 to define a second imaginary line Q, wherein the bottom end of the concave section 114 is designed as a straight line, and the straight line length of the bottom end of the concave section 114 is a1, the distance between the two magnets 12 between the midpoints of the broad sides is a2, which satisfies the following relationship: 1<

<5, reduce the occurrence of closing of the concave section 114, so that the concave section 114 located on the second imaginary line Q can limit the magnetic flux flow path, so that the magnetic flux flows to the ideal magnetic path, reducing the occurrence and optimization of magnetic flux leakage Airtight magnetic flux density distribution.

As far as the above is concerned, in order to reduce the fluctuation of the output torque of the motor, that is, to reduce the torque ripple and cogging torque of the motor, the appearance of the rotor 1 is modified, and its main purpose is to optimize the air gap magnetic flux. The density distribution makes its wave travel close to a sine wave, In order to reduce the air gap magnetic field harmonics and reduce torque fluctuations, and then achieve the purpose of improving the vibration and noise of the motor.

However, the above are only examples of the present invention, which should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application for this new model and the contents of the patent specification are still within the scope of the present invention. within the scope of this new patent.

1: Rotor

11: Rotor core

110: Shaft hole

111: Magnetic Block

1111: Magnet slot

112: Arc segment

113: Connection segment

114: Recessed segment

12: Magnets

D: The first imaginary line

d1: spacing

d2: spacing

d3: spacing

Q: The second imaginary line

R1: Arc radius

R2: Arc radius

Claims (10)

A rotor includes a rotor iron core, the rotor iron core is a cylindrical body with a predetermined length, and a shaft hole for installing a motor mandrel is arranged at the center of the rotor iron core, and the shaft hole passes through both ends of the rotor iron core, It is characterized by: The rotor core is evenly divided into a plurality of magnetic blocks with the shaft hole as the center, and the outer contour of each of the magnetic blocks has an arc segment, two connection segments and a concave segment connected in sequence along the circumferential direction; the arc segments are adjacent to each other. Between the two connecting sections, the concave section is adjacent to the first connecting section; the arc radius of the arc segment is R1, the arc radius of the connecting section is R2, the concave section and the center of the rotor core The value of the distance between the points is d3; wherein the arc line segment and the connecting segment are composed of different circle centers and different arc radii, so that the overall outline of the rotor presents a non-circular structure. The rotor of claim 1, wherein a first imaginary line is defined, the first imaginary line extends from the center point of the rotor core through the center point of the arc segment, and the center of the arc segment is The point is located on the first imaginary line; wherein the distance between the center point of the arc segment and the center point of the rotor core is d1, and the distance between the center point of the rotor core and the top of the arc segment is d1 d2, and satisfy d1<d2. The rotor described in item 2 of the scope of the patent application is characterized in that the distance between the center point of the arc segment and the center point of the rotor core is d1; the arc radius of the connecting segment is R2, and satisfies the d1<R2. The rotor according to claim 3, wherein the arc radius of the connecting segment is R2, the distance between the center point of the rotor core and the top of the arc segment is d2, and the concave segment is d2. The distance value from the center point of the rotor core is d3, and d2≧R2>d3 is satisfied. The rotor according to claim 1, characterized in that, the rotor further includes a plurality of magnets, and the magnets are respectively disposed at each magnetic force block of the rotor core. The rotor according to claim 5, wherein each of the magnetic blocks is provided with a magnet slot, the magnet slot penetrates through the bottom surface of the magnetic block along the top surface of the magnetic block, and the magnet slot for the magnet to be installed. The rotor described in claim 5 of the claimed scope is characterized in that a second imaginary line is defined, and the second imaginary line extends from the center point of the rotor core through the center point of the recessed section; wherein the recessed section is The bottom end is designed as a straight line, the length of the straight line at the bottom end of the concave section is a1, and the distance between the midpoints of the broad sides between the two magnets is a2, which satisfies the following relationship: 1<

<5. The rotor according to claim 7, wherein the shape of the recessed section is any shape. The rotor according to claim 6, wherein the shape of the magnet slot of each of the magnetic blocks is either a strip shape or a V shape. A motor, characterized in that it includes: a stator; and a rotor, which is the rotor described in any one of claims 1-9, the rotor is arranged inside the stator, and the rotor can rotate relative to the stator.

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