Permanent magnet synchronous motor frequency converter with overcurrent protection

Abstract

The utility model is suitable for the technical field of frequency converters, and provides a permanent magnet synchronous motor frequency converter with overcurrent protection, which comprises a mounting plate, the top of the mounting plate is fixedly connected with a frequency converter body, and one side of the frequency converter body is fixedly connected with an overcurrent protector; the outer side of the frequency converter body is provided with a plug sleeve, the plug sleeve is fixedly connected with the mounting plate, and the outer side of the plug sleeve is provided with a dustproof box. According to the permanent magnet synchronous motor frequency converter with overcurrent protection provided by the utility model, through arranging the plug sleeve, the dustproof box, the L-shaped rod, the rotating shaft, the clamping block and the clamping groove, the purpose of simplifying the working process of opening and closing the dustproof box by a user is realized, and the problems that the current frequency converter is arranged in the box body, the box body is generally opened and closed by adopting bolts, and the operation is inconvenient are solved. The problems that a user needs to open the box body when carrying out daily maintenance or repair on the frequency converter, but the opening and closing process of the box body is relatively complex, and the practicability is relatively poor are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of frequency converters, and in particular relates to a permanent magnet synchronous motor frequency converter with overcurrent protection. Background Art

[0002] The frequency converter is an electric power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the working power frequency of the permanent magnet synchronous motor. The frequency converter is mainly composed of rectification, filtering, inversion, braking unit, drive unit, detection unit, microprocessor unit, etc. The frequency converter adjusts the output power voltage and frequency by the internal IGBT switching, and provides the required power supply voltage according to the actual needs of the permanent magnet synchronous motor, thereby achieving the purpose of energy saving and speed regulation.

[0003] The patent document with the prior art publication number CN 216437041 U provides a frequency converter with frequency converter overcurrent protection. The device connects three baffles symmetrically on the inner surface of the inner frame, and fixes a sponge pad on the front of the three baffles, so that when the exhaust fan draws hot air from the inside of the box, the external air enters the internal frame through the through holes of the external frame and the sleeve plate, and the inhaled air alternately turns and flows along the gap between the baffle and the internal frame in the internal frame, and contacts the sponge pad many times during the flow process, so that the dust in the inhaled air is effectively adsorbed on the sponge pad, so that the air finally inhaled from the internal frame into the inside of the box is pure, the purity of the heat dissipation process is improved, dust accumulation of the frequency converter inside the box is avoided, the use stability is improved, and the heat dissipation and filtering effect is good. The current frequency converter is arranged inside the box, and the box generally uses bolts to realize the switch, which causes the user to open the box when performing daily maintenance or repair on the frequency converter, but the switch process of the box is relatively complicated and the practicality is poor. Utility Model Content

[0004] The utility model provides a permanent magnet synchronous motor frequency converter with overcurrent protection, aiming to solve the problem that the current frequency converter is arranged inside a box, and the box generally uses bolts to realize the switch, resulting in the user needing to open the box when performing daily maintenance or repair of the frequency converter, but the switch process of the box is relatively complicated and the practicality is poor.

[0005] The utility model is implemented as follows: a permanent magnet synchronous motor inverter with overcurrent protection comprises: a mounting plate, a top of the mounting plate is fixedly connected with an inverter body, one side of the inverter body is fixedly connected with an overcurrent protector; a plug sleeve is arranged on the outside of the inverter body, the plug sleeve is fixedly connected to the mounting plate, a dust box is arranged on the outside of the plug sleeve, both sides of the dust box are provided with L-shaped rods, the middle part of the L-shaped rod is rotatably connected to the dust box through a rotating shaft, adjacent sides of the two L-shaped rods are fixedly connected with a card block, one end of the card block away from the L-shaped rod passes through the dust box and extends to the plug sleeve, and the plug sleeve is provided with a matching card slot near the card block; both sides of the dust box are provided with a heat dissipation mechanism to prevent the inverter body from overheating.

[0006] Preferably, the heat dissipation mechanism includes: heat dissipation ports are fixedly connected to both sides of the dustproof box, a micro motor is arranged inside the heat dissipation port, both sides of the micro motor are fixedly connected to the heat dissipation port through fixing rods, and the output end of the micro motor is fixedly connected to heat dissipation blades; a dust cover is arranged on the side of the heat dissipation port away from the micro motor, and the dust cover is fixedly connected to the heat dissipation port.

[0007] Preferably, a spring is provided at the top of each of the L-shaped rods, and a spring groove is provided in the dustproof box near the spring, and the springs are respectively embedded in the spring grooves.

[0008] Preferably, a rectangular frame is provided on the top of the inverter body, the rectangular frame is fixedly connected to the dustproof box, a plurality of air inlets are evenly opened inside the rectangular frame, and a dustproof net is fixedly connected to the bottom of the rectangular frame.

[0009] Preferably, a heat-conducting copper plate is fixedly connected inside the rectangular frame, and a plurality of heat-dissipating fins are evenly fixedly connected to the top of the heat-conducting copper plate.

[0010] Preferably, a sealing ring is provided between the dustproof box and the mounting plate, and the sealing ring is fixedly connected to the mounting plate.

[0011] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0012] By providing a plug sleeve, a dustproof box, an L-shaped rod, a rotating shaft, a card block and a card slot, the purpose of simplifying the user's work process of opening and closing the dustproof box is achieved, and the problem that the current inverter is arranged inside the box, and the box is generally opened and closed with bolts, resulting in the user needing to open the box when performing daily maintenance or repair of the inverter, but the opening and closing process of the box is relatively complicated and has poor practicality is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 The utility model Figure 1 Enlarged view of point A in the middle;

[0015] Figure 3 The utility model Figure 1 Enlarged view of point B in the middle;

[0016] Figure 4 It is a schematic diagram of the L-shaped rod structure of the utility model.

[0017] In the figure: 1. Mounting plate; 2. Inverter body; 3. Overcurrent protector; 4. Plug sleeve; 5. Dustproof box; 6. L-shaped rod; 7. Rotating shaft; 8. Block; 9. Slot; 10. Heat dissipation mechanism; 11. Heat dissipation port; 12. Micro motor; 13. Fixing rod; 14. Heat dissipation blade; 15. Dust cover; 16. Spring; 17. Spring slot; 18. Rectangular frame; 19. Air inlet; 20. Thermal copper plate; 21. Heat dissipation fins; 22. Sealing ring; 23. Dust net. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0019] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The utility model embodiment provides a permanent magnet synchronous motor inverter with overcurrent protection, such as Figure 1-4As shown, it includes: a mounting plate 1, a frequency converter body 2 is fixedly connected to the top of the mounting plate 1, and an overcurrent protector 3 is fixedly connected to one side of the frequency converter body 2; a plug-in sleeve 4 is arranged on the outside of the frequency converter body 2, the plug-in sleeve 4 is fixedly connected to the mounting plate 1, a dustproof box 5 is arranged on the outside of the plug-in sleeve 4, L-shaped rods 6 are arranged on both sides of the dustproof box 5, the middle part of the L-shaped rod 6 is rotatably connected to the dustproof box 5 through a rotating shaft 7, and a clamping block 8 is fixedly connected to the adjacent sides of the two L-shaped rods 6, and the end of the clamping block 8 away from the L-shaped rod 6 passes through the dustproof box 5 and extends to the plug-in sleeve 4, and the plug-in sleeve 4 is provided with a matching clamping slot 9 near the clamping block 8; a heat dissipation mechanism 10 is arranged on both sides of the dustproof box 5 to prevent the frequency converter body 2 from overheating.

[0021] When the user pulls one end of the L-shaped rod 6, the L-shaped rod 6 rotates slightly with the rotating shaft 7 as the center. When the L-shaped rod 6 rotates, it drives the card block 8 to separate the card block 8 from the card slot 9 inside the plug-in sleeve 4, and lifts the dust box 5 upward to achieve the purpose of opening the dust box 5. When closing the dust box 5, the user presses down the dust box 5 vertically, and the plug-in sleeve 4 squeezes the card block 8 through the inclined surface of the card block 8, so that the card block 8 moves to the inside of the dust box 5. When the dust box 5 moves to the mounting plate 1, the L-shaped rod 6 recovers elastically, pushing the card block 8 to move to the inside of the card slot 9, so as to achieve the purpose of closing the dust box 5, thereby simplifying the user's work process of opening and closing the dust box 5, and solving the problem that the current frequency converter is arranged inside the box body, and the box body generally uses bolts to realize the switch, resulting in the user needing to open the box body when performing daily maintenance or repair on the frequency converter, but the switch process of the box body is relatively complicated and has poor practicality.

[0022] In a further preferred embodiment of the present invention, Figure 1 As shown, the heat dissipation mechanism 10 includes: heat dissipation ports 11 are fixedly connected to both sides of the dustproof box 5, a micro motor 12 is arranged inside the heat dissipation port 11, both sides of the micro motor 12 are fixedly connected to the heat dissipation port 11 through fixing rods 13, and the output end of the micro motor 12 is fixedly connected to heat dissipation blades 14; a dust cover 15 is arranged on the side of the heat dissipation port 11 away from the micro motor 12, and the dust cover 15 is fixedly connected to the heat dissipation port 11.

[0023] In this embodiment, the micro motor 12 is started, and the output end of the micro motor 12 drives the heat dissipation blades 14, so that the heat dissipation blades 14 rotate at high speed. While the heat dissipation blades 14 rotate at high speed, the heat generated by the inverter body 2 is blown out from the heat dissipation port 11 to the outside of the dustproof box 5, thereby achieving the purpose of heat dissipation. The setting of the dust cover 15 can effectively prevent dust from entering the interior of the dustproof box 5 from the heat dissipation port 11.

[0024] In a further preferred embodiment of the present invention, Figure 3As shown, a spring 16 is disposed on the top of each L-shaped rod 6 , and a spring groove 17 is formed near the spring 16 in the dustproof box 5 , and the springs 16 are respectively embedded in the spring groove 17 .

[0025] In this embodiment, when the user does not apply force to the L-shaped rod 6 , the L-shaped rod 6 can be pushed to reset.

[0026] In a further preferred embodiment of the present invention, Figure 2 As shown, a rectangular frame 18 is provided on the top of the inverter body 2, and the rectangular frame 18 is fixedly connected to the dustproof box 5. A plurality of air inlets 19 are evenly opened inside the rectangular frame 18, and a dustproof net 23 is fixedly connected to the bottom of the rectangular frame 18.

[0027] In this embodiment, it can cooperate with the heat dissipation mechanism 10 to achieve the purpose of controlling the circulation of air inside the dustproof box 5.

[0028] In a further preferred embodiment of the present invention, Figure 1-2 As shown, a heat-conducting copper plate 20 is fixedly connected inside the rectangular frame 18 , and a plurality of heat-dissipating fins 21 are evenly fixedly connected to the top of the heat-conducting copper plate 20 .

[0029] In this embodiment, the heat generated by the inverter body 2 is conducted to the inside of the heat-conducting copper plate 20, and then dissipated to the outside of the dustproof box 5 by the heat dissipation fins 21. The utility model further improves the heat dissipation effect of the device by increasing the heat dissipation area.

[0030] In a preferred embodiment, Figure 3 As shown, a sealing ring 22 is provided between the dustproof box 5 and the mounting plate 1 , and the sealing ring 22 is fixedly connected to the mounting plate 1 .

[0031] In this embodiment, the sealing performance of the contact between the dustproof box 5 and the mounting plate 1 is improved, thereby achieving the purpose of dustproofing and improving practicality.

[0032] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0033] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0034] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0035] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A permanent magnet synchronous motor inverter with overcurrent protection, comprising: A mounting plate (1), the top of the mounting plate (1) being fixedly connected to a frequency converter body (2), and one side of the frequency converter body (2) being fixedly connected to an overcurrent protector (3); The invention is characterized in that a plug sleeve (4) is arranged on the outer side of the inverter body (2), the plug sleeve (4) is fixedly connected to the mounting plate (1), a dustproof box (5) is arranged on the outer side of the plug sleeve (4), L-shaped rods (6) are arranged on both sides of the dustproof box (5), the middle part of the L-shaped rod (6) is rotatably connected to the dustproof box (5) through a rotating shaft (7), and a clamping block (8) is fixedly connected to the adjacent sides of the two L-shaped rods (6), the end of the clamping block (8) away from the L-shaped rod (6) passes through the dustproof box (5) and extends to the plug sleeve (4), and a matching clamping slot (9) is provided on the plug sleeve (4) near the clamping block (8); Both sides of the dustproof box (5) are provided with heat dissipation mechanisms (10) for preventing the inverter body (2) from overheating.

2. A permanent magnet synchronous motor inverter with overcurrent protection as claimed in claim 1, characterized in that: The heat dissipation mechanism (10) comprises: Both sides of the dustproof box (5) are fixedly connected with heat dissipation ports (11), a micro motor (12) is arranged inside the heat dissipation port (11), both sides of the micro motor (12) are fixedly connected to the heat dissipation port (11) via fixing rods (13), and the output ends of the micro motor (12) are fixedly connected with heat dissipation blades (14); A dust cover (15) is provided on the side of the heat dissipation opening (11) away from the micro motor (12), and the dust cover (15) is fixedly connected to the heat dissipation opening (11).

3. The permanent magnet synchronous motor inverter with overcurrent protection as claimed in claim 1, characterized in that: A spring (16) is arranged at the top of each L-shaped rod (6); a spring groove (17) is provided on the dustproof box (5) near the spring (16); and the spring (16) is respectively embedded in the spring groove (17).

4. A permanent magnet synchronous motor inverter with overcurrent protection as claimed in claim 1, characterized in that: A rectangular frame (18) is provided on the top of the inverter body (2), the rectangular frame (18) is fixedly connected to the dustproof box (5), a plurality of air inlets (19) are evenly arranged inside the rectangular frame (18), and a dustproof net (23) is fixedly connected to the bottom of the rectangular frame (18).

5. A permanent magnet synchronous motor inverter with overcurrent protection as claimed in claim 4, characterized in that: A heat-conducting copper plate (20) is fixedly connected inside the rectangular frame (18), and a plurality of heat-dissipating fins (21) are evenly fixedly connected to the top of the heat-conducting copper plate (20).

6. A permanent magnet synchronous motor inverter with overcurrent protection as claimed in claim 1, characterized in that: A sealing ring (22) is provided between the dustproof box (5) and the mounting plate (1), and the sealing ring (22) is fixedly connected to the mounting plate (1).

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