A torque motor

Abstract

This utility model discloses a torque motor, belonging to the field of motors, comprising: a stator assembly, including a frame and a plurality of stator units, the plurality of stator units being arranged radially along the frame, and each stator unit including a plurality of stator bodies arranged circumferentially along the frame; a rotor assembly, including a shaft and an induction rotor connected to each other, the shaft being rotatably connected within the frame, the induction rotor and the plurality of stator bodies being correspondingly arranged; and a control board electrically connected to the plurality of stator bodies. The frame includes: a main body, the shaft being rotatably connected within the main body; a support plate connected to the main body, the plurality of stator units being arranged radially along the support plate, and the plurality of stator bodies being arranged circumferentially along the support plate; and an outer cover connected to the support plate, the outer cover enclosing the plurality of stator units. The technical advantage of this utility model is that it not only has a small axial dimension but also has good speed and torque adjustment performance.

Description

Technical Field

[0001] This utility model relates to electric motors, and more particularly to a torque motor. Background Technology

[0002] A torque motor is a special type of motor that can continuously provide constant torque at low speeds or even in a stalled state. It is widely used in special robots to drive actuators.

[0003] However, the axial dimension of the related torque motor is large, making it difficult to install in narrow spaces. At the same time, the speed and torque adjustment performance of the related torque motor is poor, making it difficult to adapt to different needs. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a torque motor that not only has a small axial dimension, but also has good speed and torque adjustment performance.

[0005] Technical solution:

[0006] A torque motor, comprising:

[0007] A stator assembly includes a frame and a plurality of stator units, wherein the plurality of stator units are arranged radially along the frame, and each stator unit includes a plurality of stator bodies arranged circumferentially along the frame.

[0008] The rotor assembly includes an interconnected shaft and an induction rotor, the shaft being rotatably connected within the base, and the induction rotor and several stator bodies being correspondingly arranged.

[0009] A control board electrically connected to several of the stator bodies.

[0010] Optionally, the electrical connection between the stator units can be in series or in parallel.

[0011] Optionally, the electrical connection between several stator bodies can be a 2-pole, 4-pole, 6-pole, or 8-pole connection.

[0012] Optionally, the spacing between adjacent stator units is equal, and the spacing between adjacent stator bodies is equal.

[0013] Optionally, the number of stator bodies in each stator unit is equal.

[0014] Optionally, the stator body includes:

[0015] The magnetic core connected to the base;

[0016] A winding is wound around the magnetic core, and the winding is electrically connected to the control board.

[0017] Optionally, the base includes:

[0018] The main body is rotatably connected to the shaft within the main body.

[0019] A support plate connected to the main body, a plurality of stator units are arranged radially along the support plate, and a plurality of stator bodies are arranged circumferentially along the support plate;

[0020] An outer cover connected to the support plate, the outer cover enclosing several of the stator units.

[0021] Optionally, it may also include a plurality of bearings, the shaft being rotatably connected to the main body via the plurality of the bearings.

[0022] Beneficial effects:

[0023] (1) Since several stator units are arranged radially along the frame and several stator bodies are arranged circumferentially along the frame, it is equivalent to several stator units and several stator bodies being laid flat on the frame, which makes it easier to make the axial dimension of the stator assembly smaller, thus making the torque motor of this scheme have a smaller axial dimension, which makes it easier to install in a narrow space.

[0024] (2) When the rotating magnetic field generated by the stator body passes through the induction rotor, the induction rotor generates an induced electromotive force and forms an induced current, thereby forming an induced magnetic field. Due to the interaction of the magnetic fields, an electromagnetic torque is generated, which drives the shaft and related actuators to rotate in sequence. The number of pole pairs of the induced magnetic field generated by the induction rotor is affected by the rotating magnetic field of the stator body. The number of pole pairs of the induced magnetic field can be generated according to the change of the number of pole pairs of the rotating magnetic field of the stator body, thereby adapting to different speed and torque requirements, realizing an ultra-wide speed regulation range and an ultra-high torque speed regulation range, and having good speed and torque regulation performance. Attached Figure Description

[0025] Figure 1 This is one of the structural diagrams of the torque motor according to Embodiment 1 of this utility model;

[0026] Figure 2 This is a second structural diagram of the torque motor according to Embodiment 1 of this utility model;

[0027] Figure 3 This is a parallel connection diagram of the stator unit in Embodiment 1 of this utility model;

[0028] Figure 4 This is a series connection diagram of the stator unit in Embodiment 1 of this utility model;

[0029] Figure 5 This is one of the single-layer three-phase two-pole connection diagrams of the stator unit in Embodiment 1 of this utility model;

[0030] Figure 6 This is the second diagram of a single-layer three-phase two-pole connection of the stator unit in Embodiment 1 of this utility model;

[0031] Figure 7 This is the third diagram of a single-layer three-phase two-pole connection of the stator unit in Embodiment 1 of this utility model;

[0032] Figure 8 This is a diagram showing the three-layer, three-phase, two-pole connection of the stator unit in Embodiment 1 of this utility model;

[0033] Figure 9 This is the equivalent circuit of the series connection of the stator unit in Embodiment 1 of this utility model;

[0034] Figure 10 This is the equivalent circuit of the parallel connection of the stator units in Embodiment 1 of this utility model;

[0035] Figure 11 This is the equivalent circuit for the distributed control of the stator unit in Embodiment 1 of this utility model;

[0036] In the diagram: 1. Stator assembly; 11. Frame; 111. Main body; 112. Bearing plate; 113. Outer cover; 12. Stator unit; 121. Stator body; 1211. Magnetic core; 1212. Winding; 13. Insulating sleeve; 2. Rotor assembly; 21. Shaft; 22. Induction rotor; 3. Control board; 4. Bearing. Detailed Implementation

[0037] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The terms "first," "second," etc., used in this utility model are provided for the convenience of describing the technical solution of this utility model and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solution of this utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this utility model.

[0039] Example 1

[0040] like Figures 1-2 This embodiment provides a torque motor, including: a stator assembly 1, including a frame 11 and a plurality of stator units 12, the plurality of stator units 12 being arranged radially along the frame 11, and the stator unit 12 including a plurality of stator bodies 121 arranged circumferentially along the frame 11; a rotor assembly 2, including a shaft 21 and an induction rotor 22 connected to each other, the shaft 21 being rotatably connected to the frame 11, and the induction rotor 22 and the plurality of stator bodies 121 being correspondingly arranged; and a control board 3 electrically connected to the plurality of stator bodies 121.

[0041] Specifically, the base 11 is used to support the stator unit 12, stator body 121, etc.; both the stator unit 12 and the stator body 121 are used to generate a rotating magnetic field. The number of stator units 12 is not limited and can be three, five, etc., preferably three. The number of stator bodies 121 is not limited and can be 8, 24 or 72, etc., preferably 24. Since several stator units 12 are arranged radially along the base 11 and several stator bodies 121 are arranged circumferentially along the base 11, it is equivalent to several stator units 12 and several stator bodies 121 being laid flat on the base 11, which makes it easier to make the axial dimension of the stator assembly 1 smaller, thereby making the torque motor of this solution have a smaller axial dimension, which makes it easier to install in a narrow space.

[0042] The shaft 21 is used to connect with the relevant actuators. When the rotating magnetic field generated by the stator body 121 passes through the induction rotor 22, the induction rotor 22 generates an induced electromotive force and forms an induced current, thereby forming an induced magnetic field. Due to the interaction of the magnetic fields, an electromagnetic torque is generated, which drives the shaft 21 and the relevant actuators to rotate in sequence. The number of pole pairs of the induced magnetic field generated by the induction rotor 22 is affected by the rotating magnetic field of the stator body 121. The number of pole pairs of the induced magnetic field can be generated according to the change of the number of pole pairs of the rotating magnetic field of the stator body 121, thereby adapting to different speed and torque requirements, realizing an ultra-wide speed regulation range and an ultra-high torque speed regulation range, and having good speed and torque regulation performance. The shape of the induction rotor 22 is preferably solid, which facilitates the formation of a strong magnetic field on the outside of the induction rotor 22. The material of the induction rotor 22 is a planar magnetic material such as an armature. The connection between the shaft 21 and the induction rotor 22 can be an integral molding connection or a key connection.

[0043] like Figure 11 The control board 3 is used for distributed control of several stator units 12 and several stator bodies 121. It can control each stator unit 12 individually to achieve minimum output torque, or control several stator units 12 simultaneously to achieve maximum output torque. It can also control each stator body 121 individually to achieve emergency acceleration or emergency stop. Preferably, the control board 3 is connected to the end of the frame 11 away from the stator unit 12.

[0044] Furthermore, such as Figures 3-4 and Figures 9-10 The electrical connection between several stator units 12 is either in series or in parallel.

[0045] Specifically, several stator units 12 are connected in series to facilitate the implementation of a high-voltage, low-current control mode, which meets the driving requirements of the torque motor under high-voltage power supply conditions; several stator units 12 are connected in parallel to facilitate the implementation of a low-voltage, high-current control mode, which meets the driving requirements of the motor under low-voltage power supply conditions.

[0046] Furthermore, such as Figures 5-8 The electrical connection between several stator bodies 121 is a 2-pole, 4-pole, 6-pole, or 8-pole connection.

[0047] Specifically, by switching the wiring through an external switch or contactor, the stator assembly 1 generates a rotating magnetic field with 2, 4, 6, or 8 poles, which in turn causes the rotor assembly 2 to generate an induced magnetic field with 2, 4, 6, or 8 poles, thereby achieving pole-changing speed regulation. The control mode can be flexibly selected to meet various complex control requirements of torque motors.

[0048] Furthermore, such as Figure 1 The spacing between adjacent stator units 12 is equal, and the spacing between adjacent stator bodies 121 is equal.

[0049] Specifically, equal spacing helps to ensure good uniformity of the rotating magnetic field generated by stator assembly 1.

[0050] Furthermore, such as Figure 1 The number of stator bodies 121 in each stator unit 12 is equal.

[0051] Specifically, having an equal number of components helps to ensure good uniformity of the rotating magnetic field generated by stator assembly 1.

[0052] Furthermore, such as Figure 2 The stator body 121 includes: a magnetic core 1211 connected to the frame 11; and a winding 1212 wound around the magnetic core 1211, the winding 1212 being electrically connected to the control board 3.

[0053] Specifically, the magnetic core 1211 is used to support the winding 1212 and increase the magnetic field conduction. The magnetic core 1211 can be made of silicon steel sheets, amorphous alloys, etc. The winding 1212 is used to generate a rotating magnetic field. The winding 1212 is specifically made by winding an N-turn coil. The winding 1212 preferably passes through the base 11 through the insulating sheath 13 and is then electrically connected to the control board 3.

[0054] Furthermore, such as Figure 2 The base 11 includes: a main body 111, a shaft 21 rotatably connected to the main body 111; a support plate 112 connected to the main body 111, a plurality of stator units 12 arranged radially along the support plate 112, and a plurality of stator bodies 121 arranged circumferentially along the support plate 112; and an outer cover 113 connected to the support plate 112, which encloses the plurality of stator units 12.

[0055] Specifically, the main body 111 is used to support the bearing plate 112, shaft 21, etc.; the bearing plate 112 is used to support the stator unit 12 and stator body 121; the outer cover 113 is used to protect the stator unit 12 and stator body 121; the connection between the main body 111, the bearing plate 112 and the outer cover 113 is preferably an integral molding connection, which is convenient to ensure the integrity of the base 11.

[0056] Furthermore, such as Figure 2 It also includes several bearings 4, and the shaft 21 is rotatably connected to the main body 111 through several bearings 4.

[0057] Specifically, a number of bearings 4 are used to support the shaft 21 and reduce the friction between the shaft 21 and the main body 111. The bearings 4 are preferably deep groove ball bearings. The number of bearings 4 is not limited and can be two, three, etc., but two are preferred.

[0058] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A torque motor, characterized by include: The stator assembly (1) includes a frame (11) and a plurality of stator units (12), wherein the plurality of stator units (12) are arranged radially along the frame (11), and the stator unit (12) includes a plurality of stator bodies (121) arranged circumferentially along the frame (11). The rotor assembly (2) includes a shaft (21) and an induction rotor (22) connected to each other. The shaft (21) is rotatably connected to the base (11). The induction rotor (22) and a plurality of stator bodies (121) are correspondingly arranged. A control board (3) electrically connected to several of the stator bodies (121).

2. A torque motor according to claim 1, characterized in that The electrical connection between several of the stator units (12) is either in series or in parallel.

3. A torque motor according to claim 1, characterized in that, The electrical connection between several of the stator bodies (121) is a 2-pole, 4-pole, 6-pole, or 8-pole connection.

4. A torque motor according to any one of claims 1-3, characterized in that, The spacing between adjacent stator units (12) is equal, and the spacing between adjacent stator bodies (121) is equal.

5. A torque motor according to any one of claims 1-3, characterized in that, The number of stator bodies (121) in each stator unit (12) is equal.

6. A torque motor according to any one of claims 1-3, characterized in that, The stator body (121) includes: A magnetic core (1211) connected to the base (11); A winding (1212) is wound around the magnetic core (1211), and the winding (1212) is electrically connected to the control board (3).

7. A torque motor according to any one of claims 1-3, characterized in that, The base (11) includes: The main body (111) is rotatably connected to the shaft (21) within the main body (111); A support plate (112) connected to the main body (111), a plurality of stator units (12) are arranged radially along the support plate (112), and a plurality of stator bodies (121) are arranged circumferentially along the support plate (112); An outer cover (113) connected to the support plate (112) covers a plurality of the stator units (12).

8. A torque motor according to claim 7, characterized in that, It also includes several bearings (4), and the shaft (21) is rotatably connected to the main body (111) through several of the bearings (4).

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