Permanent magnet synchronous motor with speed regulation control device

Abstract

The utility model discloses a permanent magnet synchronous motor with a speed regulation control device, which relates to the technical field of motors and structurally comprises a motor body and a speed regulation component arranged at the end of the motor body, the motor body structurally comprises a shell component, and the shell component is provided with a first cavity; the rotating shaft component is located in the middle area of the first cavity and penetrates one end of the shell component. The rotor component is arranged in the first cavity, and the rotating shaft component bears the rotor component; the stator component is arranged on the surface of the inner wall of the first cavity, and the rotor component corresponds to the stator component; wherein at least partial area of the rotating shaft component is a ferromagnetic area, a speed regulation component is arranged on the periphery of the ferromagnetic area and comprises a shell and an electromagnet arranged around the inner wall of the shell, and the electromagnet acts on the magnetic area in a power-on state.

Description

Technical Field

[0001] This utility model relates to the field of electric motors, specifically a permanent magnet synchronous motor with a speed control device. Background Technology

[0002] Permanent magnet synchronous motors (PMSMs) are widely used in various fields, such as wind power, industrial robots, and precision machining equipment, due to their high efficiency, high power density, and excellent dynamic response characteristics. When it is necessary to reduce the speed of the motor, the power supply frequency and voltage of the motor are generally adjusted by power electronic devices such as frequency converters to reduce the motor speed. In some cases, the motor needs to be reduced in speed quickly, which existing speed control devices cannot achieve. Utility Model Content

[0003] The purpose of this invention is to provide a permanent magnet synchronous motor with a speed control device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A permanent magnet synchronous motor with a speed control device includes a motor body and a speed control component disposed at the end of the motor body. The structure of the motor body includes:

[0006] The outer shell component has a first cavity.

[0007] A rotating shaft component is located in the middle region of the first cavity and passes through one end of the outer shell component;

[0008] The rotor component is arranged in the first cavity, and the shaft component supports the rotor component.

[0009] The stator component is arranged on the inner wall surface of the first cavity, and the rotor component is arranged correspondingly to the stator component;

[0010] The rotating shaft component has at least a ferromagnetic region in some areas, and a speed regulating component is arranged around the magnetic region. The speed regulating component includes a housing and an electromagnet arranged around the inner wall of the housing. The electromagnet acts on the magnetic region when it is energized.

[0011] Preferably, the structure of the rotating shaft component includes:

[0012] A shaft body, one end of which extends to the outside of the outer casing component, and a groove is formed on the surface of the shaft body located outside the outer casing component;

[0013] Block components, the dimensions of which correspond to the arrangement of the groove, and the block components are embedded in the groove with an interference fit;

[0014] The block component is located in the ferromagnetic region and is made of ferromagnetic metal.

[0015] Preferably, the surface of the housing is provided with limiting holes, and the outer shell component is provided with threaded holes corresponding to the limiting holes. When the motor body and the speed regulating component are installed, the limiting holes and the threaded holes are set in a corresponding manner, and one end of the fastener passes through the limiting hole and connects to the threaded hole.

[0016] Preferably, multiple electromagnets are arranged, and all electromagnets are arranged at equal intervals around the rotating shaft component.

[0017] Preferably, the outer surface of the outer casing component is provided with multiple heat dissipation fins.

[0018] Preferably, it also includes a speed sensing component, which detects the speed of the rotating shaft component.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model discloses a permanent magnet synchronous motor with a speed control device, comprising a motor body and a speed control component. The motor body consists of a housing component, a shaft component located in its cavity, a rotor component, and a stator component. Notably, a portion of the shaft component is designed to be ferromagnetic to interact with electromagnets in the speed control component. The speed control component surrounds the ferromagnetic region, and electromagnets are arranged within its housing. When the electromagnets are energized, the generated magnetic field acts on the ferromagnetic region of the shaft component, creating a resistive torque to regulate the speed. Furthermore, the device is equipped with a controller, which precisely regulates the resistive torque by controlling the magnitude and duration of the energizing current to the electromagnets, thereby achieving precise control of the motor speed. The core processor unit of the controller can be a digital signal processor (DSP), responsible for receiving input signals and outputting corresponding control commands. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the appearance of a permanent magnet synchronous motor with a speed control device in one embodiment.

[0022] Figure 2 This is a cross-sectional view of a permanent magnet synchronous motor with a speed control device in one embodiment.

[0023] Figure 3 This is a schematic diagram of the speed regulating component in one embodiment.

[0024] Figure 4 This is a schematic diagram of the structure of the rotating shaft in one embodiment. Detailed Implementation

[0025] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0026] The embodiments of this patent are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0027] In the description of this patent, it should be understood that the terms "middle", "bottom", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this patent 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. Therefore, they should not be construed as limitations on this patent.

[0028] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection or installation, a detachable connection or installation, or an integral connection or installation. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0029] Please refer to Figures 1 to 3 One embodiment discloses a permanent magnet synchronous motor with a speed control device, including a motor body 1 and a speed control component 2 arranged at the end of the motor body 1. The motor body 1 includes a housing component 11 with a first cavity. A rotating shaft component 12 is located in the middle region of the first cavity and passes through one end of the housing component 11. A rotor component 13 is arranged in the first cavity, and the rotating shaft component 12 carries the rotor component 13. A stator component 14 is arranged on the inner wall surface of the first cavity, and the rotor component 13 is arranged correspondingly to the stator component 14. At least a portion of the rotating shaft component 12 is a ferromagnetic region, and the speed control component 2 is arranged around the magnetic region. The speed control component 2 includes a housing 21 and an electromagnet 22 arranged around the inner wall of the housing 21. The electromagnet 22 acts on the magnetic region when energized.

[0030] In the above embodiments, when the stator component 14 is energized to generate a rotating magnetic field, the rotor component 13 will rotate under the action of this magnetic field, thereby driving the shaft component 12 to rotate, and the speed regulating component 2 interacts with the shaft component 12. At least a portion of the shaft component 12 is designed as a ferromagnetic region, which can be attracted by the magnetic field. When the electromagnet 22 is energized, the magnetic field it generates will act on the ferromagnetic region of the shaft component 12, generating an additional resistance torque. This resistance torque will slow down the rotational speed of the shaft component 12, thereby achieving rapid deceleration of the motor. In one embodiment, a controller is also provided. By controlling the magnitude and duration of the energizing current of the electromagnet 22, the magnitude of this resistance torque can be precisely adjusted, thereby achieving precise control of the motor speed. The controller processor unit can be a digital signal processor (DSP), which receives input signals and outputs control commands to adjust the magnitude of the current passing through the electromagnet 22.

[0031] Please see Figure 4 In one embodiment, the structure of the rotating shaft component 12 includes a shaft body, one end of which extends to the outside of the outer shell component 11, and a groove 121 is formed on the surface of the shaft body located outside the outer shell component 11; the size of the block component 122 corresponds to the groove 121, and the block component 122 is interference-fitted into the groove 121; wherein, the block component 122 is located in the ferromagnetic region, and the material of the block component 122 is a ferromagnetic metal.

[0032] Specifically, the shaft can be connected to external equipment or components to transmit torque and motion. The block component 122 and the groove 121 are interference-fitted, ensuring that the block component 122 will not loosen or fall off even during high-speed rotation within the groove 121. In this embodiment, ferromagnetic metal is a material that can be strongly attracted by a magnetic field; materials such as iron (Fe), cobalt (Co), and nickel (Ni) can be selected. When the electromagnet is energized and generates a magnetic field, the block component 122 is subjected to magnetic force, thus affecting the motor speed. When the block component 122 is damaged due to long-term use or other reasons, it can be easily disassembled and replaced. The embedded block component 122 improves the maintainability of the rotating shaft component.

[0033] Please continue reading Figure 2In one embodiment, the surface of the housing 21 is provided with limiting holes, and the outer shell component 11 is provided with threaded holes corresponding to the limiting holes. When the motor body 1 and speed regulating component 2 are installed, the limiting holes and threaded holes are aligned. One end of a fastener passes through the limiting hole and connects to the threaded hole. Specifically, during installation, the motor body 1 and speed regulating component 2 are initially aligned according to a predetermined position. At this time, the limiting holes and threaded holes should be in a corresponding state. One end of the fastener is passed through the limiting hole and screwed into the threaded hole. As the fastener is screwed in, the relative position between the motor body and the speed regulating component is gradually pulled closer until a predetermined fitting accuracy is achieved. In this embodiment, the fastener can be a bolt, and the housing 21 can also be disassembled by removing the fastener.

[0034] Please continue reading Figure 3 In one embodiment, multiple electromagnets 22 are arranged at equal intervals around the rotating shaft component 12. The simultaneous action of multiple electromagnets generates a more uniform and stable magnetic field, thereby reducing speed fluctuations and improving the accuracy of speed control. The equal-interval arrangement ensures that the force exerted by each electromagnet on the rotating shaft component is balanced, avoiding speed instability caused by uneven force distribution. Furthermore, the arrangement of multiple electromagnets increases the redundancy of the speed control system. Even if one electromagnet malfunctions, the others can still maintain a certain level of control, thus improving the stability and reliability of the entire system.

[0035] Please see Figure 1 Furthermore, the outer surface of the outer shell component 11 is provided with multiple heat dissipation fins to enhance heat exchange efficiency by increasing the surface area. In one embodiment, the fins are arranged on the outer surface of the outer shell component 11. Specifically, the heat dissipation fins can be made of metal materials, such as aluminum alloy or copper alloy. These materials have good thermal conductivity and can quickly conduct internal heat to the fin surface.

[0036] Furthermore, the control device also includes a speed sensing component, which detects the rotational speed of the rotating shaft component 12. The speed sensing component is installed close to the rotating shaft component 12 to maximize the capture of changes in the shaft's motion state. In one embodiment, when the rotating shaft component rotates, it causes changes in surrounding photoelectric signals. The sensor built into the speed sensing component can capture these changes and convert them into corresponding electrical signals. These electrical signals are then transmitted to the control system for processing and analysis. Based on the processed signals, the rotational speed of the shaft is calculated, and this information is used as a feedback signal to be sent to the controller to adjust the motor's operating state to achieve the desired rotational speed.

[0037] In summary, this utility model discloses a permanent magnet synchronous motor with a speed control device, which comprises a motor body 1 and a speed control component 2. The motor body 1 consists of a housing component 11, a shaft component 12 located in its cavity, a rotor component 13, and a stator component 14. Specifically, a portion of the shaft component 12 is designed to be ferromagnetic to interact with the electromagnet 22 in the speed control component 2. The speed control component 2 surrounds the ferromagnetic region, and the electromagnet 22 is arranged inside its housing 21. When the electromagnet 22 is energized, the generated magnetic field acts on the ferromagnetic region of the shaft component 12, forming a resistance torque to regulate the speed. Furthermore, the device is equipped with a controller, which can precisely regulate the resistance torque by controlling the magnitude and duration of the energizing current of the electromagnet 22, thereby achieving precise control of the motor speed. The core processor unit of the controller can be a digital signal processor (DSP), responsible for receiving input signals and outputting corresponding control commands.

[0038] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these should also be considered within the scope of protection of this utility model. These will not affect the implementation effect of this utility model or the practicality of the patent.

Claims

1. A permanent magnet synchronous motor with a speed control device, characterized in that, The motor body includes a motor body and a speed regulating component disposed at the end of the motor body. The structure of the motor body includes: A housing component having a first cavity; A rotating shaft component, which is located in the middle region of the first cavity and passes through one end of the outer shell component; A rotor component is arranged in the first cavity, and the shaft component carries the rotor component. A stator component is arranged on the inner wall surface of the first cavity, and the rotor component is arranged correspondingly to the stator component; The rotating shaft component has at least a ferromagnetic region in a portion, and a speed regulating component is arranged around the magnetic region. The speed regulating component includes a housing and an electromagnet arranged around the inner wall of the housing. The electromagnet acts on the magnetic region when energized.

2. A permanent magnet synchronous motor with a speed control device according to claim 1, characterized in that, The structure of the rotating shaft component includes: A shaft, one end of which extends to the outside of the outer casing component, and a groove is formed on the surface of the shaft located outside the outer casing component; A block component, the size of which corresponds to the groove body, is arranged and the block component is embedded in the groove body with an interference fit; The block component is located in a ferromagnetic region and is made of ferromagnetic metal.

3. A permanent magnet synchronous motor with a speed control device according to claim 1, characterized in that, The housing surface is provided with limiting holes, and the outer shell component is provided with threaded holes corresponding to the limiting holes. When the motor body and speed regulating component are installed, the limiting holes and threaded holes are provided correspondingly, and one end of the fastener passes through the limiting hole and connects to the threaded hole.

4. A permanent magnet synchronous motor with a speed control device according to claim 1, characterized in that, Multiple electromagnets are arranged, and all electromagnets are arranged at equal intervals around the rotating shaft component.

5. A permanent magnet synchronous motor with a speed control device according to claim 1, characterized in that, The outer surface of the outer shell component is provided with multiple heat dissipation fins.

6. A permanent magnet synchronous motor with a speed control device according to claim 1, characterized in that, It also includes a speed sensing component, which detects the speed of the rotating shaft component.

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