Stator core structure of double-permanent-magnet-rotor motor

Abstract

The utility model relates to the technical field of motor speed regulation, in particular to a double permanent magnet rotor motor stator core structure, which comprises a base and a motor shaft, an embedded left stator armature core is fixedly mounted on the left side of an inner cavity of the base, and an embedded right stator armature core is fixedly mounted on the right side of the inner cavity of the base. The outer side of the motor shaft is axially sleeved with an inner winding armature rotor. The outer stator armature of the stator core structure of the double-permanent-magnet-rotor motor is of a non-full-circle structure, and part of tooth grooves are removed from the upper part and the lower part respectively, so that the center height size of the double-permanent-magnet-rotor motor is reduced; the embedded left stator armature iron core and the embedded right stator armature iron core are symmetrically arranged. When the double-permanent-magnet-rotor motor operates, single-side magnetic pulling force and asymmetric torque do not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of motor speed regulation, in particular to a stator core structure of a double permanent magnet rotor motor. Background Art

[0002] Speed ​​regulation is recognized as one of the best ways to achieve energy saving in motors. There are three main ways to regulate the speed of motors: electromagnetic speed regulation, cascade speed regulation, and variable frequency speed regulation.

[0003] Among them, electromagnetic speed regulation has low efficiency, large slip power loss, large axial length, and large space occupation, resulting in inconvenience in installation. Cascade speed regulation does not have low voltage ride-through capability. That is, when a voltage drop occurs in the power grid (temporary voltage drop), the stator current increases to maintain the output torque unchanged, resulting in a large induced current on the rotor side. Since the inverter of the slip power conversion device is directly connected in series to the rotor circuit, the slip power conversion device is easily burned due to excessive current, resulting in motor failure and shutdown. The inverter, a key device for variable frequency speed regulation, has a large capacity, complex technology, high cost, high requirements for the installation environment, and difficult maintenance and inspection.

[0004] In view of the various speed regulating operation modes of motors in the prior art, a speed regulating motor with high efficiency, small size and the same center height as the existing standard motor is needed to replace the ordinary motors with low energy efficiency currently on the market.

[0005] Chinese Patent CN 107317457 A A permanent magnet coupling speed regulating motor, which includes: a housing, an output shaft, a control structure, an electric structure, and a speed regulating structure; wherein the electric structure includes an electric rotor and a stator arranged on the inner wall of the housing; the speed regulating structure includes a winding rotor and a permanent magnet rotor; the magnetic field of the stator interacts with the magnetic field of the electric rotor to transmit torque, and the magnetic field of the winding rotor interacts with the magnetic field of the permanent magnet rotor to transmit torque; one of the winding rotor and the permanent magnet rotor is fixedly connected to the electric rotor, and the other is fixedly connected to the output shaft; the control structure is electrically connected to the winding rotor, and the control structure adjusts the current or voltage of the winding rotor. This is a structure in which the motor electromagnetic pair is on the outer layer and the speed regulating electromagnetic pair is on the inner layer.

[0006] Chinese patent CN 114977916 A discloses a speed regulating motor, comprising: a mounting housing, which is located inside a casing and is rotatably arranged relative to the casing and the motor shaft; an electric part, which comprises an inner rotor and an armature winding, wherein the inner rotor is fixedly sleeved on the motor shaft, the armature winding is fixed on the inner side of the mounting housing, and the armature winding is powered by a collector ring carbon brush assembly; a power generation part, which comprises a permanent magnet rotor and a stator winding, wherein the permanent magnet rotor is fixed on the outer side of the mounting housing, and the stator winding is fixed on the inner side of the casing; and a control part, which is electrically connected to the stator winding, and the control part is suitable for adjusting the output speed of the motor by controlling the current in the stator winding.

[0007] The above two structures are composed of two sets of magnetic coupling pairs, which will inevitably increase the center height of the traditional standard motor, which is very unfavorable for the transformation of the old system motor and requires the modification of the foundation. Therefore, it is very necessary to reduce the center height of this dual-rotor motor. Utility Model Content

[0008] The technical problem to be solved by the utility model is that the two structures of the current speed regulating motor are composed of two sets of magnetic coupling pairs, which will inevitably increase the center height of the traditional standard motor, which is very unfavorable for the transformation of the old system motor and requires the modification of the foundation. Therefore, it is very necessary to reduce the center height of this dual-rotor motor.

[0009] The utility model solves the technical problem by adopting the following technical scheme: a stator core structure of a double permanent magnet rotor motor, comprising a machine base and a motor shaft, wherein an embedded left stator armature core is fixedly installed on the left side of an internal chamber of the machine base, an embedded right stator armature core is fixedly installed on the right side of an internal chamber of the machine base, an inner winding armature rotor is axially sleeved on the outer side of the motor shaft, a first annular permanent magnet is arranged on the inner side of the embedded left stator armature core and the embedded right stator armature core, a second annular permanent magnet is axially sleeved on the outer side of the inner winding armature rotor, and a plurality of arc-shaped permanent magnets are fixed on the inner circular surface of the first annular permanent magnet and the outer circular surface of the second annular permanent magnet.

[0010] The outer arc surface of the embedded left stator armature core is provided with a left stator winding slot for reducing the center height of the dual permanent magnet rotor motor, and the outer arc surface of the embedded right stator armature core is provided with a right stator winding slot for reducing the center height of the dual permanent magnet rotor motor.

[0011] Both ends of the embedded left stator armature core and the embedded right stator armature core are provided with stator virtual slots.

[0012] The motor shaft, the first annular permanent magnet, the second annular permanent magnet and the arc-shaped permanent magnet are all arranged in concentric circles.

[0013] The embedded left stator armature core and the embedded right stator armature core are symmetrically arranged on both sides of the inner chamber of the base.

[0014] The left stator winding slot, the right stator winding slot and the stator virtual slot have the same internal size.

[0015] The beneficial effects of the utility model are:

[0016] (1) The outer stator armature of the stator core structure of a dual permanent magnet rotor motor of the utility model is a non-circular structure, and part of the tooth slots are removed at the top and bottom, so as to reduce the center height of the dual permanent magnet rotor motor;

[0017] (2) The embedded left stator armature core and the embedded right stator armature core are arranged symmetrically, and there is no unilateral magnetic pull and asymmetric torque when the dual permanent magnet rotor motor is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a partial schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Figure 1 and Figure 2 A dual permanent magnet rotor motor stator core structure shown in the figure includes a base 1 and a motor shaft 2, an embedded left stator armature core 3 is fixedly installed on the left side of the internal chamber of the base 1, an embedded right stator armature core 4 is fixedly installed on the right side of the internal chamber of the base 1, an inner winding armature rotor 5 is axially sleeved on the outer side of the motor shaft 2, a first annular permanent magnet 6 is arranged on the inner side of the embedded left stator armature core 2 and the embedded right stator armature core 3, a second annular permanent magnet 7 is axially sleeved on the outer side of the inner winding armature rotor 5, and arc-shaped permanent magnets 8 are fixed on the inner circular surface of the first annular permanent magnet 6 and the outer circular surface of the second annular permanent magnet 7.

[0024] The arc-shaped permanent magnets 8 are arranged in a circular array and fixed on the inner circular surface of the first annular permanent magnet 6 and the outer circular surface of the second annular permanent magnet 7. There are 32 arc-shaped permanent magnets 8 on the second annular permanent magnet 7, and there are 24 arc-shaped permanent magnets 8 on the first annular permanent magnet 6.

[0025] In order to reduce the center height of the dual permanent magnet rotor motor, a left stator winding slot 9 for reducing the center height of the dual permanent magnet rotor motor is opened on the outer arc surface of the embedded left stator armature core 2, and a right stator winding slot 10 for reducing the center height of the dual permanent magnet rotor motor is opened on the outer arc surface of the embedded right stator armature core 3.

[0026] In order to better guide the magnetic lines of force and make the overall operation of the dual permanent magnet rotor motor more stable, both ends of the embedded left stator armature core 2 and the embedded right stator armature core 3 are provided with stator virtual slots 11 .

[0027] In order to improve the rotation stability, the motor shaft 2, the first annular permanent magnet 6, the second annular permanent magnet 7 and the arc-shaped permanent magnet 8 are all arranged in concentric circles.

[0028] In order to ensure that the dual permanent magnet rotor motor has no unilateral magnetic pull and asymmetric torque during operation, the embedded left stator armature core 3 and the embedded right stator armature core 4 are symmetrically arranged on both sides of the inner chamber of the base 1 .

[0029] In order to reduce the processing difficulty and production cost, the inner sizes of the left stator winding slot 9, the right stator winding slot 10 and the stator virtual slot 11 are the same.

[0030] The stator armature core in this embodiment adopts an embedded left stator armature core 3 and an embedded right stator armature core 4 of a left-right design. At the same time, the number of winding slots corresponding to the need to reduce the center height of the dual permanent magnet motor is cut off from the embedded left stator armature core 3 and the embedded right stator armature core 4. The first annular permanent magnet 6 symmetrically cuts the embedded left stator armature core 3 and the embedded right stator armature core 4 to transfer torque to the second annular permanent magnet 7. The second annular permanent magnet 7 cuts the inner winding armature rotor 5 to drive the motor shaft 2 to rotate. Since the embedded left stator armature core 3 and the embedded right stator armature core 4 are completely symmetrically arranged with respect to the center of the motor, there is no unilateral magnetic pull and asymmetric torque, and the dual permanent magnet rotor motor runs more stably.

[0031] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stator core structure of a dual permanent magnet rotor motor, comprising a base (1) and a motor shaft (2), characterized in that: An embedded left stator armature core (3) is fixedly mounted on the left side of the internal chamber of the machine base (1), and an embedded right stator armature core (4) is fixedly mounted on the right side of the internal chamber of the machine base (1); an inner winding armature rotor (5) is axially sleeved on the outer side of the motor shaft (2); a first annular permanent magnet (6) is arranged on the inner side of the embedded left stator armature core (3) and the embedded right stator armature core (4); a second annular permanent magnet (7) is axially sleeved on the outer side of the inner winding armature rotor (5); and a plurality of arc-shaped permanent magnets (8) are fixed on the inner circular surface of the first annular permanent magnet (6) and the outer circular surface of the second annular permanent magnet (7).

2. The stator core structure of a dual permanent magnet rotor motor according to claim 1, characterized in that: The outer arc surface of the embedded left stator armature core (3) is provided with a left stator winding slot (9) for reducing the center height of the dual permanent magnet rotor motor, and the outer arc surface of the embedded right stator armature core (4) is provided with a right stator winding slot (10) for reducing the center height of the dual permanent magnet rotor motor.

3. The stator core structure of a dual permanent magnet rotor motor according to claim 2, characterized in that: Both ends of the embedded left stator armature iron core (3) and the embedded right stator armature iron core (4) are provided with stator virtual slots (11).

4. The stator core structure of a dual permanent magnet rotor motor according to claim 1 is characterized in that: The motor shaft (2), the first annular permanent magnet (6), the second annular permanent magnet (7) and the arc-shaped permanent magnet (8) are all arranged in concentric circles.

5. The stator core structure of a dual permanent magnet rotor motor according to claim 1, characterized in that: The embedded left stator armature iron core (3) and the embedded right stator armature iron core (4) are symmetrically arranged on both sides of the internal chamber of the machine base (1).

6. The stator core structure of a dual permanent magnet rotor motor according to claim 3 is characterized in that: The left stator winding slot (9), the right stator winding slot (10) and the stator virtual slot (11) have the same internal size.

Images