Single-bearing low-rotating-speed alternating-current motor

Abstract

The invention discloses a single-bearing low-rotating-speed alternating-current motor which is constructed by taking a single deep groove ball bearing as a core element, the motor makes full use of the characteristic that the deep groove ball bearing with a large outer ring diameter-thickness ratio has extremely high stability, and a bearing inner ring, a stator base, an iron core and a winding of the iron core form a stator; the number of magnetic pole pairs of the stator core is greater than or equal to 20 and is equal to that of magnetic pole pairs of the permanent magnet steel; a rotor is composed of a bearing outer ring, a rotor base and permanent magnet steel, and the single-bearing low-rotating-speed alternating-current motor with planar kinetic energy output is constructed. The single-bearing low-rotating-speed alternating-current motor has the advantages of being simple in structure, low in manufacturing cost, low in energy consumption, long in service life, convenient to use and easy to maintain, and can stably work for a long time under the conditions of light load and low rotating speed.

Description

Technical Field

[0001] The invention relates to the field of electric motors, in particular to a special electric motor used for rotary drum type toilets. Background Art

[0002] At present, low-speed machines driven by motors are mostly realized by high-speed or relatively high-speed motors after gear or screw speed change. However, high-speed or relatively high-speed motors are easy to wear, and the speed change mechanism is complex in structure, occupies a large space, is expensive, and has the problem of high noise that is difficult to overcome. Summary of the invention

[0003] In view of this, the present invention discloses a single-bearing low-speed AC motor with a simple and compact structure and direct planar output and low-speed, which overcomes the above-mentioned problems existing in the speed change of a high-speed or relatively high-speed motor via gears or screws.

[0004] The present invention is achieved through the following technical solutions:

[0005] The single-bearing low-speed AC motor utilizes the characteristic of extremely high stability of a deep groove ball bearing with an outer ring diameter-to-thickness ratio greater than 7. The inner and outer rings of the bearings form the core elements of the stator and rotor of the motor, that is, the stator is composed of a stator base, a bearing inner ring, a stator core and its windings. The number of stator core magnetic pole pairs is set to be greater than or equal to 20 and the number of stator core magnetic pole pairs is equal to the number of permanent magnet magnetic pole pairs of the rotor electromagnetic induction component. The polarities of two adjacent magnetic poles of the stator core are different, and the polarities of the magnetic poles between two permanent magnets of the rotor are also different. The rotor is composed of a rotor base, a bearing outer ring, and permanent magnets to form a single-bearing low-speed AC motor with planar kinetic energy output.

[0006] The single-bearing low-speed AC motor has a stator core that is a double-claw pole core, and the mechanical potential angle difference between the two claw poles is 90°. The corresponding winding is a double-coil winding, and a matching capacitor causes the voltage of one of the coil windings to shift to achieve steering control; the rotor electromagnetic induction component is a permanent magnet steel, and the circle diameter of the permanent magnet steel is larger than the diameter of the stator claw pole core, so it is constructed as an outward-transformed single-bearing claw pole bidirectional permanent magnet single-phase AC synchronous motor.

[0007] The single-bearing low-speed AC motor has a stator core that is a double-claw pole core, a mechanical potential angle difference of 90° between the two claw poles, a corresponding winding that is a double-coil winding, and a matching capacitor that causes the voltage of one of the coil windings to shift to achieve steering control; the rotor electromagnetic induction component is a permanent magnet, and the circle diameter of the permanent magnet is smaller than the diameter of the stator claw pole core, so that it is constructed as an inward-transformed single-bearing claw pole bidirectional permanent magnet single-phase AC synchronous motor.

[0008] The single-bearing low-speed AC motor has a stator core pole that is a double-core iron core pole, and the mechanical potential angle difference between the two iron core poles is 90°. The corresponding winding is an iron core coil, and the matching capacitor causes the voltage of one of the coil windings to shift to achieve steering control; the rotor electromagnetic induction component is a permanent magnet steel, and the circle diameter of the permanent magnet steel is larger than the stator core diameter, forming a relatively high-power outward-transformed single-bearing bidirectional permanent magnet single-phase AC synchronous motor.

[0009] The single-bearing low-speed AC motor has a stator core pole that is a double-core core pole, and the mechanical potential angle difference between the two core poles is 90°. The corresponding winding is an iron core coil, and the matching capacitor causes the voltage of one of the coil windings to shift to achieve steering control; the rotor electromagnetic induction component is a permanent magnet steel, and the circle diameter of the permanent magnet steel is smaller than the stator core diameter, forming a relatively high-power internal-transformation single-bearing bidirectional permanent magnet single-phase AC synchronous motor.

[0010] The single-bearing low-speed AC motor has a stator core pole that is a single-core core pole, and the number of core pole pairs is an integer multiple of 3. The corresponding winding is an iron core type 3-winding coil, and the rotor electromagnetic induction component is a permanent magnet steel, and the circle diameter of the permanent magnet steel is larger than the stator core diameter, forming a relatively high-power outward-transformed single-bearing bidirectional permanent magnet three-phase AC synchronous motor.

[0011] The single-bearing low-speed AC motor has a stator core pole that is a single-core core pole, and the number of core pole pairs is an integer multiple of 3. The corresponding winding is an iron core type 3-winding coil, and the rotor electromagnetic induction component is a permanent magnet steel, and the circle diameter of the permanent magnet steel is smaller than the stator core diameter, forming a relatively high-power internal-transformation single-bearing bidirectional permanent magnet three-phase AC synchronous motor.

[0012] The beneficial effects brought by the present invention are:

[0013] The single-bearing low-speed AC motor is a motor that fully utilizes the deep groove ball bearing with a large outer ring diameter-to-thickness ratio and has extremely high stability. It is used under low speed, small torque, and small power conditions and can maintain stable operation for a long time. It eliminates the reduction mechanism and intermediate moving parts. The motor has the characteristics of simple structure, low cost, low energy consumption, long life, easy use, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a structural schematic diagram of a single-bearing claw-pole bidirectional permanent magnet single-phase AC synchronous motor transformed from a single-bearing low-speed AC motor of the present invention, (A) is a front view, and (B) is a cross-sectional view;

[0016] Figure 2yes Figure 1 Schematic diagram of the stator double claw pole and rotor permanent magnet steel structure of the motor;

[0017] Figure 3 It is a structural schematic diagram of a single-bearing claw-pole bidirectional permanent magnet single-phase AC synchronous motor of an internal transformation of a single-bearing low-speed AC motor of the present invention, (A) is a front view, and (B) is a cross-sectional view;

[0018] Figure 4 yes Figure 3 Schematic diagram of the stator double claw pole and rotor permanent magnet steel structure of the motor;

[0019] Figure 5 It is a schematic diagram of the stator core type iron core and its winding and rotor permanent magnet steel structure of the single-bearing bidirectional permanent magnet single-phase AC synchronous motor transformed from the single-bearing low-speed AC motor of the present invention;

[0020] Figure 6 It is a schematic diagram of the stator core type iron core and its winding and rotor permanent magnet steel structure of the internal transformation single-bearing bidirectional permanent magnet single-phase AC synchronous motor of the single-bearing low-speed AC motor of the present invention;

[0021] Figure 7 The invention discloses a single-bearing low-speed AC motor. Figure 1 to Figure 6 The electrical wiring diagrams of four types of single-phase AC synchronous motors are shown. (A) is the parallel connection method, and (B) is the series connection method.

[0022] Figure 8 The present invention is a schematic diagram of the structure of a stator core type iron core and its winding and a rotor permanent magnet steel of a bidirectional permanent magnet three-phase AC synchronous motor transformed from a single-bearing low-speed AC motor.

[0023] Fig. 9 The present invention is a schematic diagram of the stator core type iron core and its winding and rotor permanent magnet steel structure of the internal transformation bidirectional permanent magnet three-phase AC synchronous motor of the single-bearing low-speed AC motor.

[0024] The numbers corresponding to the component names in the figure are as follows:

[0025] 100, stator base; 11, spring washer; 12, retaining spring I; 13, rubber ring; 14, outer retaining spring; 16, protective ring; 17, protective plate; 200, deep groove ball bearing; 21, bearing inner ring; 22, bearing outer ring; 300, stator core and its winding; 31-1, claw pole core I; 31-2, claw pole core II; 31-3, claw pole core III; 31-4, claw pole core IV; 31-5, core core V; 31-6, core core VI; 31-7, core core VII; 31-8, core core VIII; 31-9, core core IX; 31-10, core core X; 32-1, claw pole winding I; 32-2, claw pole winding II; 32-3, claw pole winding III; 32-4, claw pole winding IV; 32-5, core winding V; 32-6, core winding VI; 32-7, core winding VII; 32-8, core winding VIII; A, phase winding: 32A, A phase head; 32a, A phase tail; B, phase winding: 32B, B phase head; 32b, B phase tail; C, phase winding: 32C, C phase head; 32c, C phase tail; 400, rotor base; 41, permanent magnet; 42, spring washer; 43, retaining spring II; 401, load connection plate; 500, terminal post. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0027] Implementation method 1:

[0028] See also Figure 1 The embodiment of the single-bearing low-speed AC motor of the present invention is shown, and the motor includes a stator base 100, a deep groove ball bearing 200, a claw-pole stator core and its winding 300, a rotor base 400, a permanent magnet 41, and a terminal post 500. The stator core and its winding 300 are fixed in the plane of the stator base 100.

[0029] The deep groove ball bearing 200 is a deep groove ball bearing in which the ratio of the diameter to the thickness of the bearing outer ring 22 is greater than 7.

[0030] A retaining spring 112 is embedded near the position where the bearing inner ring 21 is installed on the stator base 100. The retaining spring 112 and the spring washer 11 work together to limit the movement of the bearing inner ring 21 of the deep groove ball bearing 200. The stator core and its winding 300 are riveted or bolted to the inner base surface of the stator base 100. Figure 2 The structure diagram of the double stator claw pole core I 31-1, the claw pole core II 31-2 and the rotor permanent magnet 41 of this embodiment is shown. The mechanical potential angle difference between the stator claw pole core I 31-1 and the claw pole core II 31-2 is 90°, and the corresponding winding is a double coil, see Figure 1, namely claw pole winding I 32-1, claw pole winding II 32-2. A retaining spring II 43 is embedded near the position where the bearing outer ring 22 is installed on the rotor base 400. The retaining spring II 43 and the spring washer 42 work together to limit the movement of the bearing outer ring 22 of the deep groove ball bearing 200. The permanent magnet 41 is embedded in the inner side of the large ring of the rotor base 400; the role of the rubber ring 13 is to prevent dust from entering the bearing, and the role of the external retaining spring 14 is to limit the displacement of the rubber ring 13. The role of the protective ring 16 is to protect the rotor from running; the joints of each winding coil are led to the terminal pile 500 for easy access to the power supply.

[0031] This embodiment requires a matching capacitor to shift the voltage of one of the coil windings, that is, the claw pole winding I 32-1 or the claw pole winding II 32-2 to achieve steering control. For details of the wiring diagram, see Figure 7 .

[0032] The diameter of the permanent magnet steel 41 of the motor rotor in this embodiment is larger than the diameter of the claw pole core I 31-1 and the claw pole core II 31-2, so it is called an external-type single-bearing claw pole type bidirectional permanent magnet single-phase AC synchronous motor, which is suitable for occasions where the required driving power is small and both positive and negative directions need to be selected.

[0033] Implementation method 2:

[0034] See also Figure 3 The embodiment of the single-bearing low-speed AC motor of the present invention shown in the figure is consistent with the embodiment 1 in the structure of the joint part of the stator base 100, deep groove ball bearing 200 and rotor base 400, which are the most basic structures of the motor. The difference lies in the difference in the structure and arrangement of the stator claw pole core and its winding and the rotor permanent magnet. In this embodiment, the inner side of the rotor base 400 is the position of the fixed bearing outer ring 22, and the outer side is the ring of the fixed permanent magnet 41; the stator claw pole core III31-3, claw pole core IV31-4 and its claw pole winding III32-3, claw pole winding IV32-4 are arranged outside the ring of the rotor permanent magnet 41, which can protect the rotor, so the protective ring 16 is omitted, and the additional protective plate 17 is to make the position of the stator double claw pole core and its winding 300 reliably locked. Figure 4 Schematic diagram of the structure of the stator claw pole core III31 - 3 , the claw pole core IV31 - 4 and the rotor permanent magnet steel 41 of the motor of this embodiment.

[0035] In order to make the load output more flexible, a load connecting plate 401 is fixed to the outside of the rotor base 400 in this embodiment to facilitate connection with the load.

[0036] This embodiment requires a matching capacitor to shift the voltage of one of the coil windings, namely the claw pole winding III 32-3 or the claw pole winding IV 32-4, to achieve steering control. The ends of each winding are led to the wiring pile 500. For details of the wiring diagram, see Figure 7 .

[0037] The diameter of the motor rotor permanent magnet 41 in this embodiment is smaller than the diameter of the stator claw pole core III31-3 and the claw pole core IV31-4, so it is called an inward-transformed single-bearing claw pole bidirectional permanent magnet single-phase AC synchronous motor, which is suitable for occasions where the required driving power is small and both forward and reverse directions need to be selected.

[0038] Implementation method three:

[0039] In this embodiment, the structure of the joint between the stator base 100, deep groove ball bearing 200 and rotor base 400, which are the most basic structures of the motor, is consistent with that of the first embodiment, and the layout of the stator core and its winding 300 is also consistent with that of the first embodiment, except that there is a difference in the structure of the stator core and its winding. Figure 5 In this embodiment, the stator core is a core core V 31-5 and a core core VI31-6, and the corresponding windings are a core winding V 32-5 and a core winding VI32-6. Moreover, the number of magnetic pole pairs of a single core core, that is, the number of magnetic pole pairs of the core core V 31-5 or the core core VI31-6 is equal to the number of magnetic pole pairs of the rotor permanent magnet 41. The structural form of the stator core core and its winding in this embodiment can generate a stronger magnetic field intensity than the structural form of the stator claw pole core and its winding, so the motor power can be made larger than that of the implementation method under the same volume.

[0040] This embodiment requires a matching capacitor to shift the voltage of one of the coil windings, that is, the core winding V 32-5 or the core winding VI32-6 to achieve steering control. The ends of each winding are led to the wiring pile 500. For details of the wiring diagram, see Figure 7 .

[0041] The diameter of the motor rotor permanent magnet 41 in this embodiment is larger than the diameter of the stator core V31-5 and the core VI31-6. It is called an outward-transformed single-bearing bidirectional permanent magnet single-phase AC synchronous motor and can be used in situations where a large driving power is required and a steering direction needs to be selected.

[0042] Implementation method 4:

[0043] In this embodiment, the structure of the joint between the stator base 100, deep groove ball bearing 200 and rotor base 400, the most basic structure of the motor, is consistent with that of the second embodiment, and the layout of the stator core and its windings is also consistent with that of the second embodiment, except that there is a difference in the structure of the stator core and its windings. Figure 6In this embodiment, the stator core is core core VII31-7 and core core VIII31-8, and the corresponding windings are core winding VII32-7 and core winding VIII32-8. Moreover, the number of magnetic pole pairs of a single core core, that is, the number of magnetic pole pairs of core core VII31-7 or core core VIII31-8 is equal to the number of magnetic pole pairs of the rotor permanent magnet 41. The structural form of the stator core core and its winding in this embodiment can generate a stronger magnetic field strength than the structural form of the stator claw pole core and its winding, so the motor power can be made larger than that of the second implementation method under the same volume.

[0044] This embodiment requires a matching capacitor to shift the voltage of one of the coil windings, that is, the core winding VII32-7 or the core winding VIII32-8 to achieve steering control. The ends of each winding are led to the wiring pile 500. For details of the wiring diagram, see Figure 7 .

[0045] The diameter of the motor rotor permanent magnet 41 in this embodiment is smaller than the diameter of the stator core type iron core VII31-7 and the core type iron core VIII31-8. It is called an internal-transformation single-bearing bidirectional permanent magnet single-phase AC synchronous motor and can be used in situations where a large driving power is required and direction selection is required.

[0046] Implementation method five:

[0047] In this embodiment, the structure of the joint between the stator base 100, deep groove ball bearing 200 and rotor base 400, the most basic structure of the motor, is consistent with that of the third embodiment. The layout of the stator core and its winding 300 and the rotor permanent magnet 41 is also consistent with that of the third embodiment. The difference is that the stator core and its winding in the third embodiment are a double-core core and double-core winding coil structure, while the stator core of this embodiment is a single-core core IX31-9, and the corresponding core winding is a three-phase winding coil structure of A, B, and C. Please refer to Figure 8 The three-phase winding coils are: A phase: A phase head 32A, A phase tail 32a; B phase: B phase head 32B, B phase tail 32b; C phase: C phase head 32C, C phase tail 32c. The ends of each winding are led to the terminal post 500 to facilitate the access of the three-phase AC power supply.

[0048] The electrical connection method of the motor in this embodiment is consistent with the electrical connection method of a common three-phase AC motor, and can be connected in a delta or a star, which will be omitted here.

[0049] The diameter of the circle of the permanent magnet steel 41 of the motor in this embodiment is larger than the diameter of the stator core type iron core IX31-9, and is referred to herein as an outward-transformed single-bearing bidirectional permanent magnet three-phase AC synchronous motor, which can be used in situations where there is a three-phase AC power supply, the driving power is large and direction selection is required.

[0050] Implementation method six:

[0051] In this embodiment, the structure of the joint between the stator base 100, deep groove ball bearing 200 and rotor base 400, the most basic structure of the motor, is consistent with that of the fourth embodiment. The layout of the stator core and its winding 300 and the rotor permanent magnet 41 is also consistent with that of the fourth embodiment. The difference is that the stator core and its winding in the fourth embodiment are double-core core and double-core winding coil structure, while the stator core of the embodiment is a single-core core X31-10, and the corresponding core winding is a three-phase winding coil structure of A, B, and C. Please refer to Fig. 9 The three-phase winding coils are: A phase; A phase head 32A, A phase tail 32a; B phase: B phase head 32B, B phase tail 32b; C phase: C phase head 32C, C phase tail 32c. The ends of each winding are led to the terminal post 500 to facilitate the access of the three-phase AC power supply.

[0052] The electrical connection method of the motor in this embodiment is consistent with the electrical connection method of a common three-phase AC motor, and can be connected in a delta or a star, which will not be described here.

[0053] The diameter of the circle of the permanent magnet steel 41 of the motor of this embodiment is smaller than the diameter of the stator core type iron core X31-10, which is called an internal transformation single-bearing bidirectional permanent magnet three-phase AC synchronous motor, and can be used in occasions with a three-phase AC power supply, a large driving power and a need for direction selection.

[0054] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, rather than limitations on the embodiments of the present invention. For those skilled in the art, many other different forms of changes or modifications can be made to the stator core and windings, and the rotor permanent magnet steel based on the above description. As long as the structural form of the single bearing of the present invention is used, including placing two bearings of the same specification stacked at the same place, etc., these obvious changes or modifications extending from the structural essence of the present invention still fall within the scope of protection of the present invention.

Claims

1. A single-bearing low-speed AC motor, comprising a stator base, a circlip I, a circlip II, a deep groove ball bearing, a stator core and its winding, a rotor base, an electromagnetic induction component permanent magnet steel, and a terminal pile, wherein: The stator core and its winding assembly are riveted or bolted to the inner base surface of the stator base, the permanent magnet steel of the rotor electromagnetic induction component is embedded in the ring of the rotor base, the deep groove ball bearing used in the motor is a deep groove ball bearing with an outer ring diameter and thickness ratio greater than 7, the stator is composed of the bearing inner ring, the stator base, the core and its winding, and the number of magnetic pole pairs of the stator core is set to be greater than or equal to 20, and the polarities of two adjacent magnetic poles of the stator core are different; the rotor is composed of the bearing outer ring, the rotor base, and the permanent magnet steel, and the polarities of two adjacent permanent magnet steels are also different, the number of magnetic pole pairs of the stator core is equal to the number of magnetic pole pairs of the permanent magnet steel, and the structure is a single-bearing low-speed AC motor.

2. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a double claw-pole core, namely claw-pole core I and claw-pole core II. The mechanical potential angle difference between claw-pole core I and claw-pole core II is 90°. The corresponding winding is a double claw-pole winding, namely claw-pole winding I and claw-pole winding II. The rotor electromagnetic induction component is a permanent magnet, and the circle diameter of the permanent magnet is larger than the diameter of the stator claw-pole core I and claw-pole core II. The matching capacitor causes the voltage of claw-pole winding I or claw-pole winding II to shift to achieve steering control, and the structure is an outward-transformed single-bearing claw-pole bidirectional permanent magnet single-phase AC synchronous motor.

3. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a double claw-pole core, namely, claw-pole core III and claw-pole core IV. The mechanical potential angle difference between claw-pole core III and claw-pole core IV is 90°. The corresponding winding is a double claw-pole winding, namely, claw-pole winding III and claw-pole winding IV. The rotor electromagnetic induction component is a permanent magnet, and the circle diameter of the permanent magnet is smaller than the diameter of the stator claw-pole core III and claw-pole core IV. The matching capacitor causes the voltage of claw-pole winding III or claw-pole winding IV to shift to achieve steering control, and the structure is an internal-transformation single-bearing claw-pole bidirectional permanent magnet single-phase AC synchronous motor.

4. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a double-core core, namely, core core V and core core VI. The mechanical potential angle difference between core core V and core core VI is 90°. The corresponding double windings are core winding V and core winding VI. The rotor electromagnetic induction component is a permanent magnet. The matching capacitor causes the voltage of core winding V or core winding VI to shift to achieve steering control. The circle diameter of the permanent magnet is larger than the diameter of the stator core core V and core core VI, so it is constructed into an outward-transformed single-bearing bidirectional permanent magnet single-phase AC synchronous motor with relatively large power.

5. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a double-core core, namely core core VII and core core VIII. The mechanical potential angle difference between core core VII and core core VIII is 90°. The corresponding double windings are core winding VII and core winding VIII. The rotor electromagnetic induction component is a permanent magnet. The matching capacitor causes the voltage of core winding VII or core winding VIII to shift to achieve steering control. The circle diameter of the permanent magnet is smaller than the diameter of the stator core core VII and core core VIII, so it is constructed into an internal transformation single-bearing bidirectional permanent magnet single-phase AC synchronous motor with relatively large power.

6. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a single-core core IX, and the number of magnetic pole pairs of the core core IX is an integer multiple of 3, the corresponding winding is a three-phase coil winding of A, B, and C, the rotor electromagnetic induction component is a permanent magnet, and the circle diameter of the permanent magnet is larger than the diameter of the stator core IX, and the structure constitutes a relatively high-power outward-transformed single-bearing bidirectional permanent magnet three-phase AC synchronous motor.

7. The single-bearing low-speed AC motor according to claim 1 is characterized in that: The stator core is a single-core core X, and the number of magnetic pole pairs of the core core X is an integer multiple of 3, the corresponding winding is a three-phase coil winding of A, B, and C, the rotor electromagnetic induction component is a permanent magnet, and the circle diameter of the permanent magnet is smaller than the diameter of the stator core core X, and the structure constitutes a relatively high-power internal-transformation single-bearing bidirectional permanent magnet three-phase AC synchronous motor.

Images