A rotating yoke magnetic circuit structure

Abstract

A rotating yoke magnetic circuit structure provided by the present invention belongs to the technical field of permanent magnet magnetic circuits and comprises: a permanent magnet rotor and a winding rotor, wherein the permanent magnet rotor comprises an inner permanent magnet rotor and an outer rotor yoke; the inner permanent magnet rotor and the outer rotor yoke are rigidly connected and rotate synchronously without speed difference; in the rotating yoke magnetic circuit structure provided by the present invention, the winding rotor punching sheets are made of oriented silicon steel sheets, and the rolling direction thereof is radial, which can increase magnetic density, reduce losses, and improve overall efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet magnetic circuits, and in particular to a rotating yoke magnetic circuit structure. Background Art

[0002] In the field of permanent magnetic circuit technology, the permanent magnetic circuit is generally composed of a magnetic potential source (permanent magnet), magnetic conductive components and air gaps, etc. When there is a speed difference between the permanent magnetic rotor and the winding rotor, an induced electromotive force is generated in the winding. When the winding is connected, an induced current loop is formed and an induced electromagnetic field is generated. The induced magnetic field interacts with the permanent magnetic field to transmit torque. The magnitude of the torque transmitted is controlled by controlling the current of the winding rotor through a controller, thereby realizing the speed regulation function.

[0003] The winding rotor includes an iron core and a winding. The iron core has a tooth portion and a yoke portion, and the tooth portion and the yoke portion are an integral structure. In the process of interaction between the permanent magnetic field and the induction magnetic field, the permanent magnetic field is constantly changing, and as the speed increases, the frequency of the alternation increases. This structure has a large iron loss and a reduced efficiency. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that during the interaction between the permanent magnetic field and the induced magnetic field, the permanent magnetic field changes continuously with the rotation, and the continuous change in the direction of the magnetic field causes an increase in iron loss and a decrease in speed regulation efficiency, thereby providing a rotating yoke magnetic circuit structure.

[0005] The present invention provides a rotating yoke magnetic circuit structure,

[0006] The rotating yoke magnetic circuit structure includes a permanent magnet rotor and a winding rotor, wherein the permanent magnet rotor is composed of an outer rotor yoke and an inner permanent magnet rotor;

[0007] The inner permanent magnet rotor is arranged on the inner ring of the winding rotor; the outer rotor yoke is sleeved on the outer ring of the winding rotor;

[0008] The outer rotor yoke and the inner permanent magnet rotor are rigidly connected and rotate synchronously;

[0009] The winding rotor is arranged between the outer rotor yoke and the inner permanent magnet rotor;

[0010] The winding rotor is composed of a winding, an inner fixed slot punching sheet and an outer fixed tooth punching sheet.

[0011] As a preferred solution, the inner fixed slot punching sheets and the outer fixed slot punching sheets in the winding rotor are made of oriented silicon steel sheets, and the rolling direction is radial.

[0012] As a preferred solution, the outer rotor yoke is formed by yoke punchings stacked axially; and the inner permanent magnet rotor is composed of inner permanent magnet rotor punchings and magnetic blocks.

[0013] As a preferred solution, the yoke punching sheets are made of non-oriented silicon steel sheets or oriented silicon steel sheets.

[0014] The present invention also provides a rotating yoke magnetic circuit structure, which includes a permanent magnet rotor and a winding rotor, wherein the permanent magnet rotor is composed of an outer permanent magnet rotor and an inner rotor yoke;

[0015] The outer permanent magnet rotor is sleeved on the outer ring of the winding rotor; the inner rotor yoke is arranged on the inner ring of the winding rotor;

[0016] The outer permanent magnet rotor and the inner rotor yoke are rigidly connected and rotate synchronously;

[0017] The winding rotor is composed of a winding, an inner fixed slot punching sheet and an outer fixed tooth punching sheet.

[0018] As a special case, when the winding rotor speed is zero, it forms a permanent magnet motor magnetic circuit structure; when the winding rotor speed is greater than zero, it forms a permanent magnet speed regulator magnetic circuit structure.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. The present invention provides a rotating yoke magnetic circuit structure, comprising: a permanent magnet rotor and a winding rotor; the permanent magnet rotor comprises: an inner permanent magnet rotor and an outer rotor yoke; the outer rotor yoke and the inner permanent magnet rotor are rigidly connected, the two rotate synchronously, there is no speed difference, the magnetic field is relatively unchanged or changes very little, the hysteresis and eddy current losses are small, and the efficiency is improved.

[0021] 2. The present invention provides a rotating yoke magnetic circuit structure, in which the inner fixed slot punching sheets and the outer fixed tooth punching sheets are made of oriented silicon steel sheets, and their rolling direction is consistent with the radial direction of the permanent magnet rotor, so that the direction of the magnetic lines of force of the permanent magnet rotor is the same as the rolling direction, the magnetic permeability along the rolling direction is high, the loss is small, and the efficiency is improved overall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the installation position structure of the outer rotor yoke, winding rotor and inner permanent magnet rotor in Example 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the outer rotor yoke structure of Example 1 of the present invention.

[0025] Figure 3 This is a schematic diagram of the winding rotor structure of Example 1 of the present invention.

[0026] Figure 4 Schematic diagram of the winding rotor punching structure of Example 1 of the present invention, (a) is an outer fixed tooth punching, and (b) is an inner fixed slot punching.

[0027] Figure 5 This is a schematic diagram of the structure of the inner permanent magnet rotor of Example 1 of the present invention.

[0028] Figure 6 This is a schematic diagram of the installation position structure of the outer permanent magnet rotor, winding rotor and inner rotor yoke of Example 2 of the present invention.

[0029] Figure 7 Schematic diagram of the winding rotor structure (a), the outer fixed tooth punching sheet (b) and the inner fixed slot punching sheet (c) of Example 2 of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure of the external permanent magnet rotor of Example 2 of the present invention.

[0031] Description of reference numerals:

[0032] 1. Outer rotor yoke; 2. Winding rotor; 3. Inner permanent magnet rotor; 4. Inner rotor yoke; 5. Outer permanent magnet rotor; 11. Magnetic block; 12. Inner permanent magnet rotor punching sheet; 21. Outer fixed tooth punching sheet; 22. Inner fixed slot punching sheet; 23. Winding; 31. Outer rotor yoke punching sheet; 32. Fixed buckle sheet; 51. Outer permanent magnet rotor casing. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Embodiment 1:

[0038] The rotating yoke magnetic circuit structure provided in this embodiment is as follows: Figure 1 As shown, it includes a permanent magnet rotor and a winding rotor; the permanent magnet rotor includes: an inner permanent magnet rotor 3 and an outer rotor yoke 1; the outer rotor yoke 1 and the inner permanent magnet rotor 3 are rigidly connected, rotate synchronously, and have no speed difference. The permanent magnetic flux starts from one magnetic pole, enters the nearest winding rotor tooth through the air gap, then bypasses the winding rotor winding through the outer rotor yoke, and returns to the two adjacent magnetic poles with different magnetization directions through the adjacent teeth. The permanent magnet rotor rotates around the center, the permanent magnetic field remains unchanged or changes very little, iron loss is not easy to generate, and efficiency is improved.

[0039] like Figure 2 The figure shows the structure of the outer rotor yoke. The outer rotor yoke 1 includes an outer rotor yoke punching sheet 31 and a fixing buckle sheet 32; the outer rotor yoke punching sheet 31 is formed by a lamination process along the axial direction; the outer rotor yoke punching sheet 31 is made of non-oriented silicon steel or oriented silicon steel sheet or other magnetic conductive materials such as Q235, 45 steel; the fixing buckle sheet 32 ​​is fixed by the outer groove of the outer rotor yoke punching sheet and is firmly welded.

[0040] like Figure 3 , Figure 4 As shown, the winding rotor structure, the outer fixed tooth punching structure and the inner fixed slot punching structure. The winding rotor 2 includes an outer fixed tooth punching 21 ( Figure 4 (a)), inner fixing groove punching piece 22 ( Figure 4(b)) and winding 23; the number of the external fixed tooth punching sheets 21 and the internal fixed slot punching sheets 22 is the same; the external fixed tooth punching sheets 21 and the internal fixed slot punching sheets 22 are made of oriented silicon steel sheets, and are processed into an iron core of the required length along the axial direction by a lamination process. The external fixed tooth punching sheets 21 and the internal fixed slot punching sheets 22 respectively include their own yoke parts and tooth parts, and the yoke parts of the external fixed tooth punching sheets 21 are provided with convex trapezoidal teeth on both sides, and the yoke parts of the internal fixed slot punching sheets 22 are provided with concave trapezoidal grooves on both sides. The external fixed tooth punching sheets 21 and the internal fixed slot punching sheets 22 are staggered in the circumferential direction, and are spliced ​​into a complete winding rotor punching sheet through trapezoidal teeth and trapezoidal grooves.

[0041] like Figure 4 As shown, the outer fixed tooth punching sheet and the inner fixed slot punching sheet are made of oriented silicon steel sheets. The rolling direction of the oriented silicon steel sheets is consistent with the radial direction of the permanent magnet rotor composed of the inner permanent magnet rotor and the outer rotor yoke. Therefore, the magnetic flux direction of the permanent magnet rotor is consistent with the magnetic conductivity direction of the silicon steel sheets (the magnetic conductivity of the silicon steel sheets is best along the rolling direction and worst perpendicular to the rolling direction). By utilizing the good magnetic conductivity of the silicon steel sheets in the rolling direction, the magnetic flux density of the permanent magnet rotor can be increased, thereby increasing the transmission torque. Therefore, when other conditions remain unchanged, the mechanical loss is reduced and the efficiency is improved overall.

[0042] like Figure 5 The figure shows the structure of the inner permanent magnet rotor. The inner permanent magnet rotor 3 includes a magnetic block 11 and an inner permanent magnet rotor sheet 12; the inner permanent magnet rotor sheet is made by axial lamination using a lamination process; the inner permanent magnet rotor sheet can be made of silicon steel sheets or general magnetic conductive materials. The magnetic block is fixed in the slot of the inner permanent magnet rotor sheet, and the magnetic pole direction is staggered according to the direction shown in the figure.

[0043] When the speed of the winding rotor 2 is zero and the speed of the permanent magnet rotor is greater than zero, the winding rotor is equivalent to the stator structure of the permanent magnet motor, and forms a permanent magnet motor magnetic circuit structure with the permanent magnet rotor. The punching sheets of the winding rotor 2 are made of oriented silicon steel sheets, and the rolling direction is the same as the radial direction of the permanent magnet rotor, so that the direction of the magnetic lines of force of the winding rotor is the same as the rolling direction of the winding rotor punching sheets. Since the magnetic conductivity of the oriented silicon steel sheet in the rolling direction is the best, the magnetic flux density can be increased. Under the same conditions, the loss of the permanent magnet motor can be reduced and the efficiency can be improved.

[0044] When the speed of the winding rotor 2 is greater than zero, a permanent magnet speed regulator magnetic circuit structure is formed.

[0045] Embodiment 2:

[0046] The rotating yoke magnetic circuit structure provided in Example 2 is as follows: Figure 6As shown, it includes a permanent magnet rotor and a winding rotor 2, wherein the permanent magnet rotor includes an inner rotor yoke 4 and an outer permanent magnet rotor 5; the outer permanent magnet rotor 5 and the inner rotor yoke 4 are rigidly connected and rotate synchronously without speed difference. The permanent magnet flux starts from one magnetic pole, enters the nearest winding rotor tooth through the air gap, then bypasses the winding rotor winding through the outer rotor yoke, and returns to the two adjacent magnetic poles with different magnetization directions through the adjacent teeth. The permanent magnet rotor rotates around the center, the permanent magnet magnetic field remains unchanged or changes very little, iron loss is not easy to generate, and efficiency is improved.

[0047] The inner rotor yoke 4 is formed by axially stacking inner rotor yoke punching sheets, which are made of non-oriented silicon steel sheets, or oriented silicon steel sheets, or other magnetic conductive materials.

[0048] like Figure 7 As shown, it is a winding rotor structure, an external fixed tooth punching structure and an internal fixed slot punching structure. The winding rotor 2 includes an external fixed tooth punching 21 (Figure (b)), an internal fixed slot punching 22 (Figure (c)) and a winding 23; the number of the external fixed tooth punching 21 and the internal fixed slot punching 22 is the same; the external fixed tooth punching 21 and the internal fixed slot punching 22 are made of oriented silicon steel sheets, and are processed into an iron core of the required length along the axial direction by a lamination process. The external fixed tooth punching 21 and the internal fixed slot punching 22 respectively include their own yoke and tooth parts, and convex trapezoidal teeth are provided on both sides of the yoke of the external fixed tooth punching 21, and concave trapezoidal grooves are provided on both sides of the yoke of the internal fixed slot punching 22. The external fixed tooth punching 21 and the internal fixed slot punching 22 are staggered in the circumferential direction, and are spliced ​​into a complete winding rotor punching through trapezoidal teeth and trapezoidal grooves. The outer fixed tooth punching sheet and the inner fixed slot punching sheet are made of oriented silicon steel sheets. The rolling direction of the oriented silicon steel sheets is consistent with the radial direction of the permanent magnet rotor composed of the inner permanent magnet rotor and the outer rotor yoke. Therefore, the magnetic flux direction of the permanent magnet rotor is consistent with the magnetic conductivity direction of the silicon steel sheets (the magnetic conductivity of the silicon steel sheets is best along the rolling direction and worst perpendicular to the rolling direction). The good magnetic conductivity of the silicon steel sheets in the rolling direction is utilized to increase the magnetic flux density of the permanent magnet rotor, thereby increasing the transmission torque. Therefore, when other conditions remain unchanged, the mechanical loss is reduced and the efficiency is improved.

[0049] like Figure 8 The outer permanent magnet rotor 5 comprises an outer permanent magnet rotor housing 51 and a magnetic block 11, which is fixed to the outer permanent magnet rotor housing by bolts, and the magnetic poles are arranged in a staggered manner as shown in the figure.

[0050] When the speed of winding rotor 2 is zero and the speed of permanent magnet rotor is greater than zero, the winding rotor is equivalent to the stator structure of permanent magnet motor, and forms the magnetic circuit structure of permanent magnet motor with permanent magnet rotor. The punching sheet of winding rotor 2 is made of oriented silicon steel sheet, and the rolling direction is the same as the radial direction of permanent magnet rotor, so that the direction of magnetic force line of winding rotor is the same as the rolling direction of winding rotor punching sheet. Since the magnetic conductivity of oriented silicon steel sheet in the rolling direction is the best, its magnetic flux density can be improved, and the transmission torque of the system can be improved; based on this performance, under the same other conditions, the loss of permanent magnet motor magnetic circuit structure can be reduced and the efficiency can be improved.

[0051] When the speed of the winding rotor 2 is greater than zero, a permanent magnet speed regulator magnetic circuit structure is formed.

[0052] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A rotating yoke magnetic circuit structure, characterized in that: The rotating yoke magnetic circuit structure comprises a permanent magnet rotor and a winding rotor (2), wherein the permanent magnet rotor is composed of an outer rotor yoke (1) and an inner permanent magnet rotor (3); The inner permanent magnet rotor (3) is arranged on the inner ring of the winding rotor (2); the outer rotor yoke (1) is arranged on the outer ring of the winding rotor; The outer rotor yoke (1) and the inner permanent magnet rotor (3) are rigidly connected and rotate synchronously; The winding rotor (2) is composed of a winding, an inner fixed slot punching sheet and an outer fixed tooth punching sheet.

2. A rotating yoke magnetic circuit structure according to claim 1, characterized in that: The inner fixed slot punching sheets and the outer fixed slot punching sheets of the winding rotor (2) are made of oriented silicon steel sheets, and the rolling direction is radial.

3. A rotating yoke magnetic circuit structure according to claim 1 or 2, characterized in that: The outer rotor yoke (1) is formed by axially stacking yoke punching sheets; The inner permanent magnet rotor (3) is composed of inner permanent magnet rotor punching sheets and magnetic blocks.

4. A rotating yoke magnetic circuit structure according to claim 3, characterized in that: The yoke punching sheets are made of non-oriented silicon steel sheets or oriented silicon steel sheets.

5. A rotating yoke magnetic circuit structure, characterized in that: The rotating yoke magnetic circuit structure comprises a permanent magnet rotor and a winding rotor, wherein the permanent magnet rotor is composed of an outer permanent magnet rotor (5) and an inner rotor yoke (4); The outer permanent magnet rotor is arranged on the outer ring of the winding rotor; the inner rotor yoke is arranged on the inner ring of the winding rotor; The outer permanent magnet rotor (5) and the inner rotor yoke (4) are rigidly connected and rotate synchronously; The winding rotor (2) is composed of a winding, an inner fixed slot punching sheet and an outer fixed tooth punching sheet.

6. A rotating yoke magnetic circuit structure according to claim 1 or 5, characterized in that: When the speed of the winding rotor (2) is zero, a permanent magnet motor magnetic circuit structure is formed; when the speed of the winding rotor (2) is greater than zero, a permanent magnet speed regulator magnetic circuit structure is formed.

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