Comprehensive control cabinet of permanent magnet synchronous motor

Abstract

The invention relates to the technical field of permanent magnet motor control, in particular to a comprehensive control cabinet of a permanent magnet synchronous motor, which comprises a control cabinet body, a circuit breaker, a motor driver and a main controller are arranged in the control cabinet body, and a motor temperature sensor and a radiator are mounted on the permanent magnet synchronous motor. One end of the main controller is electrically connected with the motor temperature sensor through a signal line, and the main controller, the circuit breaker and the motor driver are electrically connected; compared with the prior art, the radiator of the permanent magnet synchronous motor is electrically connected with the master controller and the motor driver in the control cabinet body through the radiator start-stop cable, so that start-stop control of the comprehensive control cabinet on the radiator of the permanent magnet synchronous motor can be realized; and a motor temperature sensor arranged outside the permanent magnet synchronous motor is utilized to monitor the working temperature of the permanent magnet synchronous motor.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet motor control, in particular to an integrated control cabinet for a permanent magnet synchronous motor. Background Art

[0002] Permanent magnet synchronous motors use permanent magnets to provide excitation, eliminating the collector rings and brushes that are prone to problems, and improving the reliability of motor operation. They are generally driven by the motor driver in the control cabinet. The function of the motor driver is to start and adjust the speed of the permanent magnet synchronous motor by controlling the rotation angle and running speed of the motor.

[0003] However, the traditional control cabinet cannot monitor and control the heat dissipation of the permanent magnet synchronous motor well. Secondly, the motor starter in the control cabinet will generate a lot of heat when in use, especially when the motor starter controls multiple motors at the same time, the heating phenomenon is more serious. The traditional control cabinet is generally equipped with a cooling fan with a single structure and function, which has insufficient and unsatisfactory heat dissipation effect, especially it is impossible to perform targeted heat dissipation treatment for the actual working heat generation of the motor driver in the control cabinet. For this reason, the present invention proposes a comprehensive control cabinet for permanent magnet synchronous motors. Summary of the invention

[0004] The object of the present invention is to provide an integrated control cabinet for a permanent magnet synchronous motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a comprehensive control cabinet for a permanent magnet synchronous motor, comprising a control cabinet, a circuit breaker, a motor driver and a main controller are arranged inside the control cabinet, a motor temperature sensor and a radiator are installed on the permanent magnet synchronous motor, one end of the main controller is electrically connected to the motor temperature sensor through a signal line, the main controller, the circuit breaker and the motor driver are electrically connected, a motor start-stop cable and a radiator start-stop cable are arranged on one side of the motor driver, a heat dissipation base is arranged at the bottom of the control cabinet, a plurality of horizontally arranged heat dissipation fans are installed inside the heat dissipation base, the heat dissipation fans are electrically connected to the main controller through the motor driver, a heat dissipation integrated board is fixedly installed on the rear side wall of the heat dissipation base, and a plurality of semiconductor refrigeration plates are arranged on the heat dissipation integrated board, air inlets are opened on both sides of the heat dissipation base, the heat dissipation base is connected to the control cabinet through a ventilation frame, and an air outlet is arranged on the control cabinet.

[0006] As a preferred technical solution of the present invention, the heat absorbing end surface of the semiconductor refrigeration plate is arranged on a side close to the heat dissipation base, the heat releasing end surface of the semiconductor refrigeration plate is located outside the heat dissipation base, and the heat dissipation integrated board is located above the heat dissipation base.

[0007] As a preferred technical solution of the present invention, a driver temperature sensor is installed inside the motor driver, and the driver temperature sensor is electrically connected to the main controller.

[0008] As a preferred technical solution of the present invention, a ventilation rack is provided on one side of the control cabinet close to the heat dissipation base, a driving motor is fixedly installed in the middle of the ventilation rack, the motor driver is electrically connected to the driving motor, a driving part is fixedly installed on the output shaft of the driving motor, and air-guiding telescopic plates are slidably installed on both sides of the ventilation rack.

[0009] As a preferred technical solution of the present invention, the upper ends of the two air guide telescopic plates are movably hinged with air guide fixed plates, the two air guide fixed plates are arranged parallel to each other, and the air guide fixed plates are fixedly connected to the rear side wall of the control cabinet, and the lower ends of the two air guide telescopic plates are movably hinged with sliders, and the sliders are slidably installed on the ventilation rack.

[0010] As a preferred technical solution of the present invention, the wind-guiding telescopic plate includes a plate sleeve hinged to the wind-guiding fixed plate and a movable plate slidably installed on the plate sleeve. A connecting rod is fixed to one end of the movable plate away from the plate sleeve, and both ends of the connecting rod are respectively hinged to the slider.

[0011] As a preferred technical solution of the present invention, a wind frame opening is opened on the ventilation frame, and a slider is slidably installed on the wind frame opening. A horizontally arranged first spring is installed on a side wall of the wind frame opening, and the other end of the first spring is installed on the slider.

[0012] As a preferred technical solution of the present invention, the driving member includes a driving plate fixedly mounted on the output shaft of the driving motor, an active cavity is opened on both sides of the driving plate, and a telescopic plate is movably mounted in the active cavity, and a second spring is connected between the telescopic plate and the driving plate.

[0013] As a preferred technical solution of the present invention, two opposing guide bars are fixedly installed inside the driving plate, two guide grooves corresponding to the positions of the two guide bars are opened inside the telescopic plate, and a spring accommodating cavity is also provided inside the telescopic plate between the two guide grooves.

[0014] As a preferred technical solution of the present invention, opposite vents are provided on the driving plate and the telescopic plate, and a ball is rollingly mounted on one end of the telescopic plate away from the driving plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The integrated control cabinet of a permanent magnet synchronous motor of the present invention electrically connects the radiator of the permanent magnet synchronous motor to the main controller and the motor driver in the control cabinet through the radiator start-stop cable, so that the integrated control cabinet can realize the start-stop control of the radiator of the permanent magnet synchronous motor, and the motor temperature sensor arranged outside the permanent magnet synchronous motor can be used to monitor the working temperature of the permanent magnet synchronous motor;

[0017] 2. The integrated control cabinet of a permanent magnet synchronous motor of the present invention is provided with a driver temperature sensor on the motor driver, so that when the temperature of the motor driver is too high, the motor driver can be well cooled;

[0018] 3. The integrated control cabinet for a permanent magnet synchronous motor of the present invention can further improve the heat dissipation effect of the integrated control cabinet by arranging a heat dissipation base with a heat dissipation integrated board and a semiconductor refrigeration sheet at the bottom of the control cabinet body, thereby preventing the motor driver and other electrical components from being unable to dissipate heat better when the temperature is too high.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the ventilation rack of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the wind guide telescopic plate of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the driving member of the present invention;

[0024] Figure 5 It is a front view of the driving member of the present invention;

[0025] Figure 6 It is a structural schematic diagram of a driving plate of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the telescopic plate of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the wind guide telescopic plate of the present invention when the driving member is unfolded;

[0028] In the figure: 1. control cabinet; 2. circuit breaker; 3. motor driver; 4. main controller; 5. motor start-stop cable; 6. radiator start-stop cable; 7. motor temperature sensor; 8. heat dissipation base; 9. heat dissipation integrated board; 10. semiconductor refrigeration plate; 11. cooling fan; 12. air inlet; 13. driver temperature sensor; 14. ventilation rack; 15. drive motor; 16. drive member; 17. air guide telescopic plate; 18. air guide fixed plate; 19. slider; 20. guide plate; 21. air rack opening; 22. first spring; 23. movable plate; 24. plate sleeve; 25. connecting rod; 26. drive plate; 27. telescopic plate; 28. movable cavity; 29. ​​second spring; 30. guide strip; 31. guide groove; 32. spring accommodating cavity; 33. vent; 34. ball bearing. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1-8In the present embodiment, a comprehensive control cabinet for a permanent magnet synchronous motor is provided, including a control cabinet 1, wherein a circuit breaker 2, a motor driver 3 and a main controller 4 are arranged inside the control cabinet 1, a motor temperature sensor 7 and a radiator are installed on the permanent magnet synchronous motor, one end of the main controller 4 is electrically connected to the motor temperature sensor 7 through a signal line, and the main controller 4, the circuit breaker 2 and the motor driver 3 are electrically connected, and one side of the motor driver 3 is provided with a motor start-stop cable 5 and a radiator start-stop cable 6, the motor start-stop cable 5 is used to control the start-stop of the permanent magnet synchronous motor, and the radiator start-stop cable 6 is used to control the start-stop of the radiator, and by electrically connecting the radiator of the permanent magnet synchronous motor to the main controller 4 and the motor driver 3 in the control cabinet 1 through the radiator start-stop cable 6, the start-stop control of the radiator of the permanent magnet synchronous motor can be realized by the comprehensive control cabinet, and the motor temperature sensor 7 arranged outside the permanent magnet synchronous motor can be used to complete the control of the permanent magnet synchronous motor. For monitoring of the working temperature, a heat dissipation base 8 is provided at the bottom of the control cabinet 1, and a plurality of horizontally arranged heat dissipation fans 11 are installed inside the heat dissipation base 8. The heat dissipation fan 11 is electrically connected to the main controller 4 through the motor driver 3. A heat dissipation integrated board 9 is fixedly installed on the rear side wall of the heat dissipation base 8, and a plurality of semiconductor cooling sheets 10 are arranged on the heat dissipation integrated board 9. Air inlets 12 are provided on both sides of the heat dissipation base 8. The heat dissipation base 8 is connected to the control cabinet 1 through a ventilation frame 14. An air outlet is provided on the control cabinet 1. The heat absorbing end faces of the semiconductor cooling sheets 10 are all arranged on a side close to the heat dissipation base 8, and the heat releasing end faces of the semiconductor cooling sheets 10 are located outside the heat dissipation base 8, and the heat dissipation integrated board 9 is located above the heat dissipation base 8. By arranging a heat dissipation base 8 with a heat dissipation integrated board 9 and semiconductor cooling sheets 10 at the bottom of the control cabinet 1, the heat dissipation effect of the integrated control cabinet can be further improved to prevent the motor driver 3 and other electrical components from being unable to dissipate heat better when the temperature is too high.

[0033] In this embodiment, a driver temperature sensor 13 is installed inside the motor driver 3, and the driver temperature sensor 13 is electrically connected to the main controller 4. By providing the driver temperature sensor 13 on the motor driver 3, the motor driver 3 can be well cooled in a centralized manner when the temperature is too high.

[0034] In this embodiment, in order to better carry out centralized heat dissipation for the motor driver 3, a ventilation frame 14 is provided on one side of the control cabinet 1 close to the heat dissipation base 8, a driving motor 15 is fixedly installed in the middle of the ventilation frame 14, the motor driver 3 is electrically connected to the driving motor 15, a driving member 16 is fixedly installed on the output shaft of the driving motor 15, and air guide telescopic plates 17 are slidably installed on both sides of the ventilation frame 14, the air guide telescopic plates 17 include a plate sleeve 24 hinged to the air guide fixed plate 18 and a movable plate 23 slidably installed on the plate sleeve 24, a connecting rod 25 is fixed on the end of the movable plate 23 away from the plate sleeve 24, and the two ends of the connecting rod 25 are respectively hinged to the slider 19, a wind frame opening 21 is opened on the ventilation frame 14, and the slider 19 is slidably installed on the wind frame opening The air outlet 21 is on the ventilation rack 14, a horizontally arranged first spring 22 is installed on one side wall of the air outlet 21 of the air rack, and the other end of the first spring 22 is installed on the slider 19, the upper ends of the two air guide telescopic plates 17 are movably hinged with an air guide fixed plate 18, the two air guide fixed plates 18 are arranged parallel to each other, and the air guide fixed plate 18 is fixedly connected to the rear side wall of the control cabinet 1, the lower ends of the two air guide telescopic plates 17 are movably hinged with a slider 19, the slider 19 is slidably installed on the ventilation rack 14, and the lower end of the slider 19 is fixedly connected with a guide plate 20, the driving member 16 includes a driving plate 26 fixedly installed on the output shaft of the driving motor 15, and movable cavities 28 are opened on both sides of the driving plate 26, and a telescopic plate 27 is movably installed in the movable cavity 28, and the telescopic plate 27 and the driving plate 26 are connected. A second spring 29 is connected between the slider 19 and the first spring 22. It should be noted that the elastic force of the second spring 29 is much greater than that of the first spring 22. The function of the first spring 22 is to automatically reset the slider 19 when the slider 19 is not subjected to force, and the function of the second spring 29 is to push the slider 19 in both directions through its elastic force greater than that of the first spring 22, so that the first spring 22 is compressed. The length of the drive plate 26 is slightly smaller than the inner width of the control cabinet 1. When in use, when the driver temperature sensor 13 detects that the temperature of the motor driver 3 is too high, the main controller 4 commands the motor driver 3 to control the drive motor 15 to rotate half a circle. The rotation of the drive motor 15 can drive the drive member 16 to rotate. The rotating drive member 16 can move the air guide telescopic plates 17 on both sides to The two move in opposite directions. Since the wind guide fixed plate 18 is fixed on the control cabinet 1, and the upper end of the wind guide telescopic plate 17 is movably hinged with the upper end of the wind guide telescopic plate 17, the top position of the upper end plate sleeve 24 of the wind guide telescopic plate 17 remains unchanged at this time, and the bottom position of the lower end movable plate 23 of the wind guide telescopic plate 17 will move horizontally with the slider 19, so that the wind guide telescopic plate 17 can be tilted and unfolded, so that the two unfolded wind guide telescopic plates 17 can form a better flared air inlet structure, which can guide the wind of the multiple cooling fans below it to be concentrated between the two wind guide fixed plates 18, so that the motor driver 3 in the middle can be concentratedly cooled, and the heat dissipation efficiency and effect can be limitedly improved.

[0035] In this embodiment, two opposing guide bars 30 are fixedly installed inside the driving plate 26, and two guide grooves 31 corresponding to the positions of the two guide bars 30 are provided inside the telescopic plate 27. A spring accommodating chamber 32 is also provided inside the telescopic plate 27 between the two guide grooves 31. Opposite vents 33 are provided on the driving plate 26 and the telescopic plate 27, and a ball 34 is rollingly installed on one end of the telescopic plate 27 away from the driving plate 26. In order to improve the stability of the driving plate 26 and the telescopic plate 27 when they are telescoped, the guide bars 30 and the guide grooves 31 can be used to guide and limit their positions well, and when the second spring 29 is gradually compressed, the guide bar 30 can limit its position well, the spring accommodating chamber 32 can be used to accommodate the second spring 29 well, and the ball 34 can be used to make the contact between the driving member 16 and the wind-guiding telescopic plate 17 smoother and more fluent when they are unfolded.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive control cabinet for a permanent magnet synchronous motor, characterized in that: The invention comprises a control cabinet (1), wherein a circuit breaker (2), a motor driver (3) and a main controller (4) are arranged inside the control cabinet (1), a motor temperature sensor (7) and a radiator are installed on the permanent magnet synchronous motor, one end of the main controller (4) is electrically connected to the motor temperature sensor (7) via a signal line, the main controller (4), the circuit breaker (2) and the motor driver (3) are electrically connected, a motor start-stop cable (5) and a radiator start-stop cable (6) are arranged on one side of the motor driver (3), and a motor start-stop cable (5) and a radiator start-stop cable (6) are arranged at the bottom of the control cabinet (1). A heat dissipation base (8) is provided, wherein a plurality of horizontally arranged heat dissipation fans (11) are installed inside the heat dissipation base (8), wherein the heat dissipation fans (11) are electrically connected to a main controller (4) via a motor driver (3), a heat dissipation integrated board (9) is fixedly installed on the rear side wall of the heat dissipation base (8), and a plurality of semiconductor cooling sheets (10) are arranged on the heat dissipation integrated board (9), air inlets (12) are provided on both sides of the heat dissipation base (8), the heat dissipation base (8) is connected to a control cabinet (1) via a ventilation frame (14), and an air outlet is provided on the control cabinet (1).

2. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: The heat absorbing end faces of the semiconductor cooling sheets (10) are arranged on a side close to the heat dissipation base (8), the heat releasing end faces of the semiconductor cooling sheets (10) are located outside the heat dissipation base (8), and the heat dissipation integrated board (9) is located above the heat dissipation base (8).

3. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: A driver temperature sensor (13) is installed inside the motor driver (3), and the driver temperature sensor (13) is electrically connected to the main controller (4).

4. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: A ventilation rack (14) is provided on one side of the control cabinet (1) close to the heat dissipation base (8); a driving motor (15) is fixedly installed in the middle of the ventilation rack (14); the motor driver (3) is electrically connected to the driving motor (15); a driving member (16) is fixedly installed on the output shaft of the driving motor (15); and wind guide telescopic plates (17) are slidably installed on both sides of the ventilation rack (14).

5. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: The upper ends of the two wind guide telescopic plates (17) are both movably hinged with wind guide fixed plates (18), the two wind guide fixed plates (18) are arranged parallel to each other, and the wind guide fixed plates (18) are fixedly connected to the rear side wall of the control cabinet (1), and the lower ends of the two wind guide telescopic plates (17) are both movably hinged with sliders (19), and the sliders (19) are slidably installed on the ventilation frame (14).

6. The integrated control cabinet for a permanent magnet synchronous motor according to claim 5, characterized in that: The wind guide telescopic plate (17) comprises a plate sleeve (24) hinged to the wind guide fixed plate (18) and a movable plate (23) slidably mounted on the plate sleeve (24); a connecting rod (25) is fixed to one end of the movable plate (23) away from the plate sleeve (24); and both ends of the connecting rod (25) are respectively hinged to the slider (19).

7. The integrated control cabinet for a permanent magnet synchronous motor according to claim 6, characterized in that: The ventilation frame (14) is provided with a wind frame opening (21), and a slider (19) is slidably mounted on the wind frame opening (21); a first spring (22) arranged horizontally is mounted on a side wall of the wind frame opening (21), and the other end of the first spring (22) is mounted on the slider (19).

8. The integrated control cabinet for a permanent magnet synchronous motor according to claim 4, characterized in that: The driving member (16) comprises a driving plate (26) fixedly mounted on the output shaft of the driving motor (15), movable cavities (28) are provided on both sides of the driving plate (26), a telescopic plate (27) is movably mounted in the movable cavity (28), and a second spring (29) is connected between the telescopic plate (27) and the driving plate (26).

9. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: Two opposing guide bars (30) are fixedly mounted inside the driving plate (26), two guide grooves (31) corresponding to the positions of the two guide bars (30) are opened inside the telescopic plate (27), and a spring accommodating cavity (32) is also arranged inside the telescopic plate (27) between the two guide grooves (31).

10. The integrated control cabinet for a permanent magnet synchronous motor according to claim 1, characterized in that: The driving plate (26) and the telescopic plate (27) are both provided with opposite ventilating openings (33), and a ball (34) is rollingly mounted on one end of the telescopic plate (27) away from the driving plate (26).

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