Integrated variable-frequency permanent-magnet synchronous motor

Abstract

The utility model discloses an integrated variable-frequency permanent-magnet synchronous motor, which comprises a permanent-magnet synchronous motor body and a frequency converter, the shell comprises a front end cover, a base and a rear end cover; the frequency converter comprises a frequency converter body and an operation panel. The operation panel is used for controlling the starting, stopping and rotating speed of the permanent magnet synchronous motor body; a junction box is arranged below the operation panel and used for being connected with a cable to supply power to the permanent magnet synchronous motor body and the frequency converter. The permanent magnet synchronous motor body further comprises a cooling fan and a fan protective cover arranged on the outer side of the cooling fan. According to the integrated frequency conversion permanent magnet synchronous motor, the frequency converter is integrated in the permanent magnet synchronous motor, the installation position of a traditional frequency converter is omitted, the installation space is greatly saved, the occupied field space is small, meanwhile, the transmission distance between the motor and the frequency converter is reduced, energy consumption is saved, and maintenance is convenient; and due to the specific structural design, the frequency converter is high in heat dissipation speed and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of electric motor technology, specifically to an integrated variable frequency permanent magnet synchronous motor. Background Technology

[0002] Electric motors can be classified into DC motors and AC motors according to the type of power supply they use. DC motors have the advantages of good speed regulation performance and a wide speed range, but their structure is more complex and their manufacturing and maintenance costs are higher. In contrast, AC motors, such as permanent magnet synchronous motors, have a simpler structure and are relatively easy to manufacture and maintain. Their speed and power supply frequency always maintain an accurate synchronous relationship, so controlling the power supply frequency can control the motor speed.

[0003] A frequency converter is a power control device that controls an AC motor by changing the frequency of the power supply to the motor. Frequency converters provide continuous speed regulation, allowing the motor to adapt to different load demands and improving system flexibility and response speed. By adjusting the motor's operating frequency, frequency converters can ensure the motor operates at its optimal efficiency point under different operating conditions, thereby reducing energy waste and lowering energy consumption.

[0004] Therefore, permanent magnet synchronous motors are often used in conjunction with frequency converters. In the prior art, the frequency converter is usually located on the top of the motor. For example, Chinese patent (CN 222395560 U) discloses a generator frequency converter module, which includes a frequency converter body and a housing installed outside the frequency converter body; the bottom of the housing is provided with support feet that fit into the four corners of the terminal box on the top of the permanent magnet synchronous generator for limiting insertion; a baffle is provided on the upper part of the support, which is used to abut against the top cover of the terminal box after the support is inserted, thereby limiting the movement.

[0005] In the aforementioned patent, the frequency converter is placed directly on top of the permanent magnet synchronous motor, resulting in a large overall structure that requires a significant amount of space for installation. Utility Model Content

[0006] To address the shortcomings of existing technologies, this application provides an integrated variable frequency permanent magnet synchronous motor. This integrated variable frequency permanent magnet synchronous motor integrates the frequency converter into the permanent magnet synchronous motor, making the frequency converter and motor a single unit. The overall size of the motor remains unchanged, eliminating the need for a traditional frequency converter installation location, significantly saving installation space and requiring less floor space. Furthermore, the integrated structure reduces the transmission distance between the motor and the frequency converter, which is beneficial for energy saving and ease of maintenance. The specific structural design also ensures rapid heat dissipation and high reliability of the frequency converter.

[0007] The technical solution of this application is as follows:

[0008] An integrated variable frequency permanent magnet synchronous motor includes a permanent magnet synchronous motor body and a frequency converter. The permanent magnet synchronous motor body includes a housing and a rotor and stator disposed inside the housing. The housing includes a front cover, a base, and a rear cover. The frequency converter includes a frequency converter body and an operation panel. The operation panel is used to control the start, stop, and speed of the permanent magnet synchronous motor body. A mounting plate is provided inside the rear cover, and the frequency converter body is disposed on the mounting plate. The operation panel is disposed on the housing of the base and is electrically connected to the frequency converter body. A junction box is provided below the operation panel for connecting cables to supply power to the permanent magnet synchronous motor body and the frequency converter. The permanent magnet synchronous motor body also includes a cooling fan and a fan guard disposed outside the cooling fan.

[0009] Compared with existing technologies, the integrated variable frequency permanent magnet synchronous motor of this application integrates the main body of the frequency converter into the permanent magnet synchronous motor and integrates the operation panel of the frequency converter into the housing of the permanent magnet synchronous motor, so that the frequency converter and the motor form a whole, while the overall size of the motor remains unchanged, the structure is more compact, and the installation position of the traditional frequency converter is eliminated, which greatly saves installation space and occupies less space. At the same time, the integrated structure also reduces the transmission distance between the motor and the frequency converter, which is conducive to saving energy and facilitating maintenance. Moreover, the frequency converter is integrated on the mounting plate and can be cooled by the cooling fan of the motor, which makes the frequency converter heat dissipation fast and reliable.

[0010] As an optimization, in the aforementioned integrated variable frequency permanent magnet synchronous motor, the mounting plate is equipped with a heat dissipation module to conduct heat from the inverter body to the rear end cover. By setting a heat dissipation module on the mounting plate, the heat dissipation capacity of the inverter body can be improved, thereby enhancing the reliability of the motor.

[0011] As an optimization, the aforementioned integrated variable frequency permanent magnet synchronous motor is equipped with heat dissipation fins on the front cover, frame, and rear cover. The heat dissipation fins increase the surface area of ​​the housing, allowing more heat to dissipate through air convection, thereby improving the motor's heat dissipation efficiency.

[0012] As an optimization, in the aforementioned integrated variable frequency permanent magnet synchronous motor, the cooling fan is an axial flow fan. Axial flow fans can generate a large airflow while maintaining a certain air pressure, resulting in better heat dissipation; moreover, axial flow fans have a compact structure, are easy to install, and operate with low noise.

[0013] As an optimization, in the aforementioned integrated variable frequency permanent magnet synchronous motor, the junction box is equipped with a set of terminal studs for connecting wires. The terminal studs securely fasten the wires to the junction box, ensuring a stable connection and safe fixation of the wires.

[0014] As an optimization, the aforementioned integrated variable frequency permanent magnet synchronous motor includes a set of wiring markings on the junction box corresponding to the wiring studs. This wiring marking allows installation and maintenance personnel to quickly and accurately identify the wiring, improving installation and maintenance efficiency and reducing the possibility of incorrect wiring.

[0015] As an optimization, in the aforementioned integrated variable frequency permanent magnet synchronous motor, the operation panel includes control buttons and a display screen, and the control buttons have marking grooves. This structure, with marking grooves on the control buttons, helps users accurately locate and operate the control buttons, reducing the possibility of misoperation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the integrated variable frequency permanent magnet synchronous motor of this application;

[0017] Figure 2 yes Figure 1 A structural diagram showing the fan guard removed;

[0018] Figure 3 yes Figure 1 A partial structural diagram (with part of the shell removed);

[0019] Figure 4 yes Figure 3 Another perspective view;

[0020] Figure 5 This is a schematic diagram of the junction box in this application;

[0021] Figure 6 This is a schematic diagram of the operation panel in this application.

[0022] The markings in the attached diagram are as follows: 1-Permanent magnet synchronous motor body, 11-Housing, 111-Front end cover, 112-Frame, 113-Rear end cover, 12-Rotor, 13-Stator, 14-Mounting plate, 15-Cooling fan, 16-Fan guard; 2-Inverter, 21-Inverter body, 22-Operation panel, 221-Control button, 2211-Identification groove, 222-Display screen, 23-Cooling module; 3-Junction box, 31-Wiring stud, 32-Wiring marking; 4-Cooling fins. Detailed Implementation

[0023] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. In the following embodiments, content not described in detail or shown in detail in the accompanying drawings is common knowledge in the art.

[0024] Example (see) Figures 1-6 ):

[0025] An integrated variable frequency permanent magnet synchronous motor includes a permanent magnet synchronous motor body 1 and a frequency converter 2. The permanent magnet synchronous motor body 1 includes a housing 11 and a rotor 12 and a stator 13 disposed inside the housing. The housing 11 includes a front cover 111, a base 112, and a rear cover 113. The frequency converter 2 includes a frequency converter body 21 and an operation panel 22. The operation panel 22 is used to control the start, stop, and speed of the permanent magnet synchronous motor body 1. The rear cover 113 has a mounting plate 14 inside, and the frequency converter body 21 is disposed on the mounting plate 14. The operation panel 22 is disposed on the housing of the base 112 and is electrically connected to the frequency converter body 21. A junction box 3 is provided below the operation panel 22 for connecting cables to supply power to the permanent magnet synchronous motor body 1 and the frequency converter 2. The permanent magnet synchronous motor body 1 also includes a cooling fan 15 and a fan guard 16 disposed outside the cooling fan 15.

[0026] In this embodiment, the mounting plate 14 is provided with a heat dissipation module 23, which is used to conduct heat from the inverter body 21 to the rear cover 113. By providing the heat dissipation module 23 on the mounting plate, the heat dissipation capacity of the inverter body 21 can be improved, thereby improving the reliability of the motor.

[0027] In this embodiment, heat dissipation ribs 4 are provided on the front cover 111, the base 112, and the rear cover 113. Providing heat dissipation ribs 4 increases the surface area of ​​the housing 11, allowing more heat to dissipate through air convection, thereby improving the heat dissipation efficiency of the motor.

[0028] In this embodiment, the cooling fan 15 is an axial fan. Axial fans can generate a large airflow while maintaining a certain air pressure, resulting in good heat dissipation; moreover, axial fans have a compact structure, are easy to install, and produce less noise during operation.

[0029] In this embodiment, the junction box 3 is provided with a set of terminal studs 31 for connecting wires. The terminal studs 31 can fix the wires to the junction box 3, ensuring a stable connection and secure fixation of the wires.

[0030] In this embodiment, the junction box 3 is provided with a set of wiring labels 32 corresponding to the wiring studs 31. This structure with wiring labels 32 enables installation and maintenance personnel to quickly and accurately identify the wiring, which not only improves the efficiency of installation and maintenance work, but also reduces the possibility of incorrect wiring.

[0031] In this embodiment, the operation panel 22 includes control buttons 221 and a display screen 222. The control buttons 221 are provided with marking grooves 2211. This structure, with marking grooves 2211 on the control buttons 221, can help users accurately locate and operate the control buttons 221, reducing the possibility of misoperation.

[0032] When the integrated variable frequency permanent magnet synchronous motor of this embodiment is working, you only need to press the control button 221 on the operation panel 22 as needed.

[0033] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this application.

Claims

1. Integrated variable frequency permanent magnet synchronous motor, comprising a permanent magnet synchronous motor body (1) and a frequency converter (2); the permanent magnet synchronous motor body (1) comprises a shell (11) and a rotor (12) and a stator (13) arranged inside the shell; the shell (11) comprises a front end cover (111), a base (112) and a rear end cover (113); the frequency converter (2) comprises a frequency converter body (21) and an operation panel (22); the operation panel (22) is used for controlling the start, stop and rotating speed of the permanent magnet synchronous motor body (1); characterized in that: The inside of the rear end cover (113) is provided with a mounting plate (14), and the frequency converter body (21) is arranged on the mounting plate (14); the operation panel (22) is arranged on the shell of the base (112) and is electrically connected with the frequency converter body (21); a wiring box (3) is arranged below the operation panel (22) and is used for connecting cables to supply power to the permanent magnet synchronous motor body (1) and the frequency converter (2); the permanent magnet synchronous motor body (1) further comprises a cooling fan (15) and a fan protection cover (16) arranged outside the cooling fan (15).

2. The integrated variable frequency permanent magnet synchronous motor of claim 1, wherein: The mounting plate (14) is provided with a cooling module (23) for conducting heat of the frequency converter body (21) to the rear end cover (113).

3. The integrated variable frequency permanent magnet synchronous motor of claim 2, wherein: The front end cover (111), the base (112) and the rear end cover (113) are all provided with cooling ribs (4).

4. The integrated variable frequency permanent magnet synchronous motor of claim 3, wherein: The cooling fan (15) is an axial flow fan.

5. The integrated variable frequency permanent magnet synchronous motor of claim 4, wherein: The wiring box (3) is provided with a group of wiring studs (31) for connecting wires.

6. The integrated variable frequency permanent magnet synchronous motor of claim 5, wherein: The wiring box (3) is provided with a group of wiring marks (32) corresponding to the wiring studs (31).

7. The integrated variable frequency permanent magnet synchronous motor of any one of claims 1-6, wherein: The operation panel (22) comprises control buttons (221) and a display screen (222), and the control buttons (221) are provided with mark grooves (2211).

Images