Capacitor fixing device and permanent magnet all-in-one machine

Abstract

The utility model discloses a capacitor fixing device and a permanent magnet all-in-one machine. The capacitor fixing device comprises a capacitor and a limiting part machine fixing module. The limiting part is arranged above the capacitor, and a gap is formed between the limiting part and the capacitor; the fixing module is arranged in the gap and comprises a fixing seat arranged at the top of the capacitor; the adjusting nut is in sliding connection with the fixed seat; the adjusting screw rod passes through the adjusting nut; the connecting rod part comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is rotationally connected with the first end of the second connecting rod, the second end of the first connecting rod is rotationally connected with the adjusting nut, and the second end of the second connecting rod is rotationally connected with the fixed seat; the connecting rod part moves towards the direction close to the limiting part so as to abut against the limiting part, so that the capacitor is limited between the limiting part and the placement bearing surface of the capacitor; and the connecting rod part moves towards the direction far away from the limiting part to be separated from the limiting part so as to release the limiting of the capacitor. According to the scheme, the IGBT module and the capacitor are convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of electric motors, in particular to a capacitor fixing device and a permanent magnet integrated machine. Background Art

[0002] A permanent magnet integrated motor (PMM) is a motor drive system that integrates a permanent magnet motor and an electronic control system. It uses a permanent magnet motor as the drive motor, leveraging the magnetic properties of permanent magnet materials to achieve motor drive. PMMs can be used in various industrial applications, such as wind power generation, water pumps, compressors, and fans.

[0003] Reference Figure 1 The permanent magnet integrated machine includes an IGBT module 100, a capacitor 300, a power module 500, and other components. An IGBT (Insulated Gate Bipolar Transistor), also known as an insulated gate bipolar transistor (IGBT), is a fully controlled, voltage-driven, composite power semiconductor device composed of a BJT (bipolar junction transistor) and a MOS (insulated gate field-effect transistor). The capacitor 300 is secured above the IGBT module 100 by a fastener 600. In actual use, the IGBT module 100 experiences failures far more frequently than the capacitor. Repairing the IGBT module 100 requires first removing the capacitor 300 and fastener 600 before accessing the module. Furthermore, for high-power equipment, the capacitor 300 is heavy, exceeding 50 kg for example. During underground repairs, the lack of on-site lifting equipment necessitates manual removal of the capacitor 300, increasing the difficulty of repair.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Summary of the Invention

[0005] In response to the problems pointed out in the background technology, the utility model proposes a capacitor fixing device and a permanent magnet integrated machine, which facilitate the disassembly, assembly and maintenance of IGBT modules and capacitors.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0007] In some embodiments of the present application, a capacitor fixing device is provided, comprising a capacitor, a limiting portion, and a fixing module; the limiting portion is disposed above the capacitor, with a gap between the limiting portion and the capacitor; the fixing module is disposed within the gap, comprising: a fixing seat disposed on top of the capacitor; an adjustment nut slidably connected to the fixing seat; an adjustment screw connected via the adjustment nut; a connecting rod portion, comprising a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, the second end of the first connecting rod is rotatably connected to the adjustment nut, and the second end of the second connecting rod is rotatably connected to the fixing seat; the connecting rod portion moves toward the limiting portion to abut against the limiting portion, thereby limiting the capacitor between the limiting portion and the capacitor's placement support surface; the connecting rod portion moves away from the limiting portion to disengage from the limiting portion, thereby releasing the capacitor from the limiting portion. This solution facilitates disassembly, assembly, and maintenance of the IGBT module and capacitor.

[0008] In some embodiments of the present application, the adjusting screw is a bidirectional screw, and the bidirectional screw includes two threaded sections, and the adjusting nut and the connecting rod portion are respectively provided on each of the threaded sections.

[0009] In some embodiments of the present application, a guide groove is provided on the fixing seat, and the adjusting nut is slidably connected to the guide groove.

[0010] In some embodiments of the present application, the fixing seat includes two oppositely arranged sub-fixing seats, the guide groove is provided on the side wall of any of the sub-fixing seats, and the adjustment screw rod passes between the two sub-fixing seats.

[0011] In some embodiments of the present application, the second end of the first connecting rod is rotatably connected to the adjusting nut via a first pin shaft, and the end portion of the first pin shaft is located in the guide groove and slides along the guide groove.

[0012] In some embodiments of the present application, a groove portion is provided on the limiting portion, and the groove portion extends along the length direction of the adjusting screw rod, and the connecting rod portion moves toward the limiting portion to abut against the groove portion.

[0013] In some embodiments of the present application, a plurality of the fixing modules are provided on the top of the capacitor.

[0014] In some embodiments of the present application, a reinforcement portion is provided on the outer wall of the capacitor, and the fixing module is provided on the reinforcement portion.

[0015] In some embodiments of the present application, a handle is provided on the outer wall of the capacitor.

[0016] In some embodiments of the present application, a permanent magnet integrated machine is provided, comprising an IGBT module; and further comprising the capacitor fixing device as described above, wherein the limiting portion is fixedly arranged at the bottom of the IGBT module.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] In the permanent magnet integrated machine disclosed in the present application, the capacitor is detachably arranged below the IGBT module. When the IGBT module needs to be repaired, the capacitor does not need to be removed and the top IGBT module can be directly repaired; when the bottom capacitor needs to be repaired, the IGBT module does not need to be removed and the capacitor can be taken out from under the IGBT module, thereby achieving non-interference in the repair of the IGBT module and the capacitor.

[0019] When installing the capacitor, the capacitor is placed below the limiting portion, with a gap between the top of the capacitor and the limiting portion. The adjusting screw is rotated in a first direction under the action of an external force, and the adjusting nut drives the connecting rod to deform in a direction close to the limiting portion, so that the connecting rod abuts against the limiting portion, thereby limiting the capacitor between the limiting portion and the placement bearing surface of the capacitor, thereby achieving the tensioned positioning of the capacitor. When disassembling the capacitor, the adjusting screw is rotated in a third direction under the action of an external force, and the adjusting nut drives the connecting rod to deform in a direction away from the limiting portion, so that the connecting rod is away from the limiting portion, releasing the limiting portion on the capacitor, and allowing the capacitor to be removed from below the limiting portion. The capacitor disassembly and assembly process is simple, easy to operate, reduces labor intensity, and saves maintenance time.

[0020] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 This is a partial structural diagram of a permanent magnet integrated machine in the prior art;

[0023] Figure 2 is a partial structural diagram of a permanent magnet integrated machine according to some embodiments;

[0024] Figure 3 is a partial side view of a permanent magnet integrated machine according to some embodiments;

[0025] Figure 4 for Figure 3 Middle AA section view;

[0026] Figure 5 for Figure 4 Enlarged view of middle part B;

[0027] Figure 6 is a structural diagram of a capacitor, a fixing module, and a limiting portion according to some embodiments;

[0028] Figure 7 is another structural diagram of a capacitor, a fixing module, and a limiting portion according to some embodiments;

[0029] Figure 8 is a structural diagram of a capacitor and a fixing module according to some embodiments;

[0030] Figure 9 is a structural diagram of a limiting portion according to some embodiments;

[0031] Figure 10 is a structural diagram of a fixing module according to some embodiments;

[0032] Figure 11 is a top view of a fixing module according to some embodiments;

[0033] Figure 12 for Figure 11 Middle CC section view;

[0034] Figure 13 for Figure 11 Middle DD section view.

[0035] Reference numerals:

[0036] 100, IGBT module; 110, IGBT body; 120, heat sink;

[0037] 200, limiting portion; 210, groove portion;

[0038] 300, capacitor; 310, reinforcement; 311, first reinforcement; 312, second reinforcement; 321, first handle; 322, second handle;

[0039] 400, fixing module; 410, fixing seat; 411, sub-fixing seat; 412, guide groove; 420, adjustment screw; 430, adjustment nut; 440, connecting rod; 441, first connecting rod; 442, second connecting rod; 451, first pin; 452, second pin;

[0040] 500, power module;

[0041] 600. Fixing parts. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 this application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will recognize the application of other processes and / or the use of other materials.

[0048] In some embodiments of the present application, a permanent magnet integrated machine is provided, referring to Figures 2 to 5 , includes an IGBT module 100 and a capacitor 300 . The capacitor 300 is arranged below the IGBT module 100 .

[0049] In actual use of the permanent magnet integrated machine, the IGBT module 100 fails more frequently than the capacitor 300. Placing the capacitor 300 below the IGBT module 100 allows for direct repair of the upper IGBT module 100 without removing the capacitor 300.

[0050] In some embodiments of the present application, the capacitor 300 is detachably disposed below the IGBT module 100. Thus, when the capacitor 300 needs to be repaired, the capacitor 300 can be removed from below the IGBT module 100 without disassembling the IGBT module 100.

[0051] In some embodiments of the present application, the permanent magnet integrated machine includes a fixing device, which is configured to detachably install the capacitor 300 below the IGBT module 100.

[0052] The fixing device includes a limiting portion 200. The limiting portion 200 is fixedly disposed at the bottom of the IGBT module 100. The limiting portion 200 is located above the capacitor 300, with a gap between the limiting portion 200 and the top of the capacitor 300.

[0053] For example, the limiting portion 200 is a flat plate structure, and the limiting portion 200 is fixedly mounted on the bottom of the IGBT module 100 by screws or the like. Figure 9 2 is a structural diagram of the limiting portion 200 .

[0054] The fixing device further includes a fixing module 400 , and the fixing module 400 is located in the gap.

[0055] Figure 6 It is a structural diagram of the limiting part 200, the fixing module 400, and the capacitor 300. Figure 7This is another structural diagram of the limiting portion 200, the fixing module 400, and the capacitor 300. Figure 7 Only one capacitor 300 is shown. Figure 8 It is a structural diagram of the capacitor 300 and the fixing module 400. Figure 10 is a structural diagram of the fixed module 400, Figure 11 It is a top view of the fixed module 400. The number of capacitors 300 is determined according to the specifications of the permanent magnet integrated machine, for example Figure 6 Four capacitors 300 are provided.

[0056] The fixing module 400 includes a fixing base 410 , an adjusting nut 430 , an adjusting screw 420 , and a connecting rod 440 .

[0057] The fixing base 410 is fixed to the top of the capacitor 300 by screws or the like. The adjusting nut 430 is slidably connected to the fixing base 410. The adjusting screw 420 is threadedly connected to the adjusting screw 420 via the adjusting nut 430. In other words, the adjusting nut 430 is threadedly connected to the adjusting screw 420.

[0058] The connecting rod portion 440 includes a first connecting rod 441 and a second connecting rod 442. The first end of the first connecting rod 441 is rotatably connected to the first end of the second connecting rod 442. The second end of the first connecting rod 441 is rotatably connected to the adjustment nut 430. The second end of the second connecting rod 442 is rotatably connected to the fixing base 410. The second end of the first connecting rod 441 and the second end of the second connecting rod 442 are spaced apart along the length of the adjustment screw 420.

[0059] The fixing module 400 is configured such that the connecting rod portion 440 moves toward the limiting portion 200 to abut against the limiting portion 200 , thereby limiting the capacitor 300 between the limiting portion 200 and the placement support surface of the capacitor 300 .

[0060] When installing the capacitor 300, the capacitor 300 is placed below the limiting portion 200, with a gap between the top of the capacitor 300 and the limiting portion 200. The adjusting screw 420 rotates in a first direction (for example, clockwise) under the action of an external force, and the adjusting nut 430 moves in a second direction along the adjusting screw 420. The second direction is the direction in which the adjusting nut 430 approaches the second end of the second connecting rod 442. The adjusting nut 430 drives the connecting rod 440 to deform in a direction close to the limiting portion 200, so that the connecting rod 440 is 40 abuts against the limiting portion 200, that is, the adjusting nut 430 drives the second end of the first connecting rod 441 to move toward the second end of the second connecting rod 442, so that the first end of the first connecting rod 441 and the first end of the second connecting rod 442 move toward the direction close to the limiting portion 200, until the top of the first connecting rod 441 and the second connecting rod 442 abut against the limiting portion 200, thereby limiting the capacitor 300 between the limiting portion 200 and the placement bearing surface of the capacitor 300, thereby realizing the tensioning positioning of the capacitor 300.

[0061] The fixing module 400 is further configured so that the connecting rod portion 440 moves in a direction away from the limiting portion 200 to separate from the limiting portion 200 , thereby releasing the limiting of the capacitor 300 .

[0062] When removing the capacitor 300, the adjusting screw 420 rotates in a third direction (for example, counterclockwise) under the action of external force, and the adjusting nut 430 moves along the adjusting screw 420 toward a fourth direction. The fourth direction is the direction in which the adjusting nut 430 moves away from the second end of the second connecting rod 442. The adjusting nut 430 drives the connecting rod portion 440 to deform in a direction away from the limiting portion 200, so that the connecting rod portion 440 moves away from the limiting portion 200, that is, the adjusting nut 430 drives the second end of the first connecting rod 441 to move in a direction away from the second end of the second connecting rod 442, so that the first end of the first connecting rod 441 and the first end of the second connecting rod 442 move in a direction away from the limiting portion 200 until the top of the first connecting rod 441 and the second connecting rod 442 are separated from the limiting portion 200, thereby releasing the limiting portion 200 on the capacitor 300. At this time, the capacitor 300 can be removed from the bottom of the limiting portion 200 to facilitate maintenance of the capacitor 300.

[0063] In some embodiments of this application, refer to Figure 10 The adjusting screw rod 420 is a bidirectional screw rod, which includes two threaded sections, and an adjusting nut 430 and a connecting rod portion 440 are respectively provided on each threaded section.

[0064] In other words, the bidirectional screw includes a first threaded section and a second threaded section, wherein the threads of the first threaded section and the second threaded section have opposite rotation directions. The first threaded section is provided with an adjustment nut 430 and a connecting rod portion 440, and the second threaded section is also provided with an adjustment nut 430 and a connecting rod portion 440.

[0065] The bidirectional screw rotates under external force, causing the two adjustment nuts 430 and the two connecting rods 440 to move synchronously. When installing the capacitor 300, the tops of the two connecting rods 440 simultaneously abut against the stopper 200, improving the reliability of the capacitor 300's position. When removing the capacitor 300, the tops of the two connecting rods 440 simultaneously break away from the stopper 200 and contact the stopper of the capacitor 300.

[0066] In some embodiments of this application, refer to Figure 10 The fixing seat 410 is provided with a guide groove 412, and the adjusting nut 430 is slidably connected to the guide groove 412. The guide groove 412 guides the movement of the adjusting nut 430.

[0067] In some embodiments of this application, refer to Figure 10The fixing base 410 includes two oppositely disposed sub-fixing bases 411. A guide groove 412 is provided on the side wall of each sub-fixing base 411. The adjusting screw 420 passes between the two sub-fixing bases 411. The sub-fixing base 411 is fixed to the top of the capacitor 300 by screws or the like.

[0068] The two sub-fixing seats 411 are arranged opposite to each other, so that the guide grooves 412 on both sides can guide the adjusting nut 430 in both directions, and provide installation space for the adjusting nut 430, the adjusting screw rod 420 and the connecting rod part 440, with a compact structure.

[0069] In some embodiments of this application, refer to Figure 11 and Figure 12 The second end of the first connecting rod 441 is rotatably connected to the adjusting nut 430 via a first pin 451. The end of the first pin 451 is located in the guide groove 412 and slides along the guide groove 412. The first pin 451 realizes the rotational connection between the first connecting rod 441 and the adjusting nut 430, and the sliding connection between the adjusting nut 430 and the fixing base 410, resulting in a compact structure.

[0070] In some embodiments of this application, refer to Figure 11 and Figure 13 The second end of the second connecting rod 442 is rotatably connected to the sub-fixing seat 411 through the second pin shaft 452.

[0071] In some embodiments of this application, refer to Figure 9 The limiting portion 200 is provided with a groove portion 210 , and the groove portion 210 extends along the length direction of the adjusting screw rod 420 , and the connecting rod portion 440 moves toward the direction close to the limiting portion 200 to abut against the groove portion 210 .

[0072] In other words, when the adjustment screw 420 is rotated, the top of the connecting rod 440 (i.e., the tops of the first connecting rod 441 and the second connecting rod 442) slides along the groove 210, and the groove 210 guides the movement of the connecting rod 440. At the same time, when the top of the connecting rod 440 abuts the groove 210, the groove 210 limits the connecting rod 440, thereby limiting the position of the capacitor 300.

[0073] In some embodiments of this application, refer to Figures 2 to 4 The IGBT module 100 includes an IGBT body 110 and a heat sink 120. The heat sink 120 is disposed at the bottom of the IGBT body 110 and is configured to cool the IGBT body 110. For example, the heat sink 120 is a water-cooled plate. The stopper 200 is disposed at the bottom of the heat sink 120.

[0074] In some embodiments of the present application, multiple fixing modules 400 are provided on the top of the capacitor 300 to improve the limiting reliability of the capacitor 300. For example, referring to Figure 8 Four fixing modules 400 are provided on the top of the capacitor 300 .

[0075] The multiple fixing parts can be tightened separately, and even when the capacitor top plates are not coplanar, the capacitor can still be reliably tightened and positioned, thereby reducing the processing accuracy of the capacitor housing.

[0076] In some embodiments of this application, refer to Figure 8 A reinforcement portion 310 is provided on the outer wall of the capacitor 300 , and the fixing module 400 is provided on the reinforcement portion 310 . The reinforcement portion 310 is a reinforcement plate, which improves the structural strength of the capacitor 300 .

[0077] In some embodiments of the present application, a handle is provided on the outer wall of the capacitor 300 to facilitate holding and using the capacitor 300 when moving it. The handle is provided on the reinforcement portion 310 to improve the structural strength.

[0078] In some embodiments of the present application, the reinforcement portion 310 includes a first reinforcement portion 311 and a second reinforcement portion 312. The first reinforcement portion 311 is disposed on the top of the capacitor 300. The second reinforcement portion 312 is disposed on the side of the capacitor 300. A first handle 321 is disposed on the first reinforcement portion 311. A second handle 322 is disposed on the second reinforcement portion 312.

[0079] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0080] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A capacitor fixing device, characterized in that: Includes: capacitance; a limiting portion, disposed above the capacitor, with a gap between the limiting portion and the capacitor; The fixing module is arranged in the gap and includes: A fixing seat, fixedly arranged on the top of the capacitor; An adjusting nut, slidably connected to the fixing seat; An adjusting screw, passing through the adjusting nut; The connecting rod portion includes a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, the second end of the first connecting rod is rotatably connected to the adjusting nut, and the second end of the second connecting rod is rotatably connected to the fixing seat; The fixing module is configured such that the connecting rod moves toward the limiting portion to abut against the limiting portion, so as to limit the capacitor between the limiting portion and the placement bearing surface of the capacitor; The fixing module is further configured so that the connecting rod moves in a direction away from the limiting portion to disengage from the limiting portion, thereby releasing the limiting of the capacitor.

2. The capacitor fixing device according to claim 1, characterized in that: The adjusting screw rod is a bidirectional screw rod, and the bidirectional screw rod includes two threaded sections, and the adjusting nut and the connecting rod portion are respectively provided on any of the threaded sections.

3. The capacitor fixing device according to claim 1, characterized in that: The fixing seat is provided with a guide groove, and the adjusting nut is slidably connected to the guide groove.

4. The capacitor fixing device according to claim 3, characterized in that: The fixing seat includes two sub-fixing seats arranged opposite to each other, the guide groove is arranged on the side wall of any of the sub-fixing seats, and the adjusting screw rod passes between the two sub-fixing seats.

5. The capacitor fixing device according to claim 4, characterized in that: The second end of the first connecting rod is rotatably connected to the adjusting nut through a first pin shaft, and the end portion of the first pin shaft is located in the guide groove and slides along the guide groove.

6. The capacitor fixing device according to claim 1, characterized in that: The limiting portion is provided with a groove portion, and the groove portion extends along the length direction of the adjusting screw rod. The connecting rod portion moves toward the limiting portion to abut against the groove portion.

7. The capacitor fixing device according to any one of claims 1 to 6, characterized in that: A plurality of fixing modules are arranged on the top of the capacitor.

8. The capacitor fixing device according to any one of claims 1 to 6, characterized in that: A reinforcement portion is provided on the outer wall of the capacitor, and the fixing module is provided on the reinforcement portion.

9. The capacitor fixing device according to any one of claims 1 to 6, characterized in that: A handle is provided on the outer wall of the capacitor.

10. A permanent magnet integrated machine, comprising: IGBT modules; It is characterized by: It also includes the capacitor fixing device according to any one of claims 1 to 9, wherein the limiting portion is fixedly arranged at the bottom of the IGBT module.

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