Capacitor grounding structure for soft start of single-phase asynchronous motor
By designing a capacitor grounding structure in a single-phase asynchronous motor, the capacitor terminals are connected to the connection part of the motor control board, thus grounding the metal shell of the capacitor. This solves the problems of inconvenient installation and aesthetics in the existing technology, and improves the stability and safety of grounding.
Patent Information
- Application Number
- CN202520441344.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-13
AI Technical Summary
The existing grounding structure for single-phase asynchronous motor capacitors requires an additional grounding wire, which is inconvenient to install and the exposed grounding wire affects the appearance and is easily broken.
Design a capacitor grounding structure that connects the capacitor terminals to the capacitor connection parts of the motor control board one by one, and connects them to the grounding connection parts through grounding terminals, so as to achieve grounding of the metal shell of the capacitor and avoid the need to install an additional grounding wire.
It improves the efficiency of capacitor grounding assembly, connection stability and firmness, avoids grounding circuit breakage, and is both aesthetically pleasing and safe.
Smart Images
Figure CN223956453U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of capacitor installation of single-phase asynchronous motor, especially relates to a capacitor grounding structure for single-phase asynchronous motor soft start. BACKGROUND
[0002] At present, capacitor is used in the starting, running, protection and energy saving of single-phase asynchronous motor, and the capacitor needs to be grounded when being used to protect the equipment and prevent electric shock and improve safety performance, the existing capacitor grounding structure needs to be additionally connected with the grounding wire, and the grounding wire needs to be operated and installed after the capacitor is connected to the electric control board, so that the installation is inconvenient, the exposed grounding wire affects the appearance, and the grounding wire is easily broken. INNOVATION CONTENT
[0003] The utility model aims at providing a capacitor grounding structure for single-phase asynchronous motor soft start to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0004] The technical scheme adopted to solve the above technical problems is as follows:
[0005] The utility model provides a capacitor grounding structure for single-phase asynchronous motor soft start, which comprises:
[0006] A capacitor is provided with a plurality of capacitor connectors and a capacitor metal shell;
[0007] An electric control board of a motor is provided with a plurality of capacitor connecting portions and grounding connecting portions;
[0008] A grounding member is connected with the shell wall of the capacitor metal shell, the grounding member is provided with grounding connectors extending in the same direction as the plurality of capacitor connectors, and the capacitor connectors and the grounding connectors are respectively connected with the capacitor connecting portions and the grounding connecting portions on the electric control board of the motor in the same direction.
[0009] The capacitor grounding structure has the following beneficial effects:
[0010] In use, in the process of assembling and connecting the capacitor with the motor electric control board, the capacitor is connected with a plurality of capacitor connecting parts on the motor electric control board through a plurality of capacitor joints in one-to-one correspondence, so as to realize the electric control connection between the capacitor and the motor electric control board, and the grounding joint is also connected with the grounding connecting part on the motor electric control board in correspondence, so as to realize the grounding connection of the capacitor metal shell. The capacitor metal shell can be grounded while the capacitor and the motor electric control board are electrically connected, the efficiency of capacitor grounding assembly is improved, no additional grounding wire is needed, and the connection between the grounding joint and the grounding connecting part is more stable and firm through the connection of the plurality of capacitor joints and the plurality of capacitor connecting parts, so that the grounding circuit is connected with the grounding circuit of the motor through the motor electric control board, and no additional grounding wire is needed.
[0011] In addition, the capacitor metal shell can be grounded while the capacitor and the motor electric control board are electrically connected, the efficiency of capacitor grounding assembly is improved, no additional grounding wire is needed, and the connection between the grounding joint and the grounding connecting part is more stable and firm through the connection of the plurality of capacitor joints and the plurality of capacitor connecting parts, so that the grounding circuit is connected with the grounding circuit of the motor through the motor electric control board, and no additional grounding wire is needed.
[0012] As a further improvement of the above technical solution, the grounding member is in the form of a ring structure, and the grounding member is sleeved on the outer peripheral wall of the capacitor metal shell.
[0013] As a further improvement of the above technical solution, the grounding member is located on the position of the capacitor metal shell close to the plurality of capacitor joints.
[0014] As a further improvement of the above technical solution, the further improvement of the technical solution further comprises a fastening sleeve, the outer periphery of the capacitor metal shell is provided with a limiting portion extending outward, the fastening sleeve is sleeved on the outer periphery of the capacitor metal shell, and the grounding member is clamped between the fastening sleeve and the limiting portion.
[0015] As a further improvement of the above technical solution, the fastening sleeve is in the form of a spring structure.
[0016] As a further improvement of the above technical solution, the outer periphery of one end of the capacitor metal shell close to the capacitor joint is provided with a turned-up edge folded outward to form the limiting portion.
[0017] As a further improvement of the above technical solution, the grounding member is in the form of a spring structure, and the two ends of the spring structure are respectively in abutment with the limiting portion and the fastening sleeve.
[0018] As a further improvement of the above technical solution, one end of the spring structure is provided with a spring wire extending in the same direction as the capacitor joint to form the grounding joint.
[0019] As a further improvement of the above technical solution, the spring wire comprises an inclined section and a straight section which are connected by bending, the inclined section extends along the limiting part, the straight section extends along the axial direction of the capacitor, one end of the straight section away from the inclined section is provided with an elbow which is bent in an inverted U shape, the grounding connecting part is a grounding jack, and the elbow is inserted into the grounding jack.
[0020] As a further improvement of the above technical solution, the capacitor connecting part comprises two elastic clamping strips which are arranged on the motor electronic control board in a spaced mode, and the side edges of the two elastic clamping strips which face each other are respectively provided with notches, and the capacitor connector is inserted between the two notches.
[0021] Other features and advantages of the present application will be described in the following description and become apparent from the description, or can be learned from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0022] The present application will be further described below in conjunction with the drawings and embodiments.
[0023] Figure 1 is an exploded view of an embodiment of the capacitor grounding structure provided by the present application. Figure 1 ;
[0024] Figure 2 is an exploded view of an embodiment of the capacitor grounding structure provided by the present application. Figure 2 ;
[0025] Figure 3 is a sectional view of an embodiment of the capacitor grounding structure provided by the present application.
[0026] Figure 4 is Figure 3 a partial enlarged view of part A in FIG.
[0027] Figure 5 is a schematic view of an embodiment of the spring structure provided by the present application.
[0028] Figure 6 is a schematic view of another embodiment of the spring structure provided by the present application.
[0029] Figure 7 is an exploded view of an embodiment of the capacitor grounding structure provided by the present application. Figure 3 ;
[0030] Figure 8 is an exploded view of an embodiment of the capacitor grounding structure provided by the present application. Figure 4 ;
[0031] REFERENCE SIGNS:
[0032] Capacitor 100; electricity connection end 110; capacitor connection 111; capacitor metal shell 120; limiting part 121;
[0033] Grounding part 200; grounding connection 210;
[0034] Motor control board 300; capacitor connection part 310; elastic clip 311; notch 312; grounding connection part 320;
[0035] Fastening sleeve 400;
[0036] Spring structure 500; spring wire 510; inclined section 511; straight section 512; elbow 513. DETAILED DESCRIPTION
[0037] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are used to explain the present application, and cannot be understood as a limitation of the present application.
[0038] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0039] In the description of the present application, the plural refers to two or more. If there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0040] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0041] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the following described embodiments are only part of the embodiments of the present application, not all embodiments.
[0042] At present, capacitor is used in single-phase asynchronous motor starting, running, protection and energy saving, and the capacitor needs to be grounded when used, so as to protect the equipment and prevent electric shock, improve safety performance, the existing capacitor grounding structure needs to be connected with the ground wire, and the ground wire needs to be operated and installed after the capacitor is connected to the electric control board, which is inconvenient to install, and the exposed ground wire will affect the appearance and be easily broken, therefore, the utility model provides a capacitor grounding structure for single-phase asynchronous motor soft starting, which can simplify the assembly of capacitor grounding and improve the stability of grounding.
[0043] As Figure 1 shown, the capacitor grounding structure for single-phase asynchronous motor soft starting includes a capacitor 100, a grounding piece 200 and a motor electric control board 300.
[0044] The capacitor 100 can be used for starting and running of single-phase asynchronous motor, one end of the capacitor 100 in the embodiment is an electricity connection end 110, the electricity connection end 110 is provided with a plurality of capacitor connectors 111, the capacitor connectors 111 are used for realizing connection of electric control, three capacitor connectors 111 are arranged in the embodiment to realize three-phase connection, and in other embodiments, two capacitor connectors 111 or one capacitor connector 111 can be arranged.
[0045] The capacitor 100 is provided with a capacitor metal shell 120, the capacitor metal shell 120 in the embodiment is in a cylindrical shape, and in other embodiments, the capacitor metal shell 120 can have other shapes.
[0046] The capacitor 100 in the embodiment is vertically arranged, and the electricity connection end 110 is upwardly arranged, and in other embodiments, the capacitor 100 can be arranged in other directions, and the electricity connection end 110 can also be arranged in other directions.
[0047] As Figure 1 and Figure 2 shown, the capacitor grounding structure for single-phase asynchronous motor soft starting includes a capacitor 100, a grounding piece 200 and a motor electric control board 300.
[0048] As Figure 1 shown, the capacitor grounding structure for single-phase asynchronous motor soft starting includes a capacitor 100, a grounding piece 200 and a motor electric control board 300. Figure 7As shown, the motor control panel 300 is provided with a plurality of capacitor connecting portions 310 and grounding connecting portions 320, the plurality of capacitor connecting portions 310 are connected with the capacitor connectors 111 one by one, specifically, the capacitor connecting portions 310 of the embodiment are provided with three, in other embodiments, the capacitor connecting portions 310 can be provided with two or one, and the grounding connector 210 is connected with the grounding connecting portions 320, when the capacitor 100 is assembled, the power terminal 110 of the capacitor 100 is connected with the motor control panel 300 along the up-down direction, wherein the capacitor connector 111 is connected with the capacitor connecting portion 310, and the grounding connector 210 is connected with the grounding connecting portion 320, in other embodiments, the power terminal 110 of the capacitor 100 can be connected with the motor control panel 300 along other directions.
[0049] Further, in the process of assembling and connecting the capacitor 100 and the motor control panel 300, the power terminal 110 on the capacitor 100 is connected with the capacitor connecting portion 310 on the motor control panel 300 through the capacitor connector 111, so as to realize the electrical control connection between the capacitor 100 and the motor control panel 300, at the same time, the grounding connector 210 is also connected with the grounding connecting portion 320 on the motor control panel 300, so as to realize the grounding connection of the capacitor metal shell 120.
[0050] In the utility model, the grounding line of the capacitor 100 can be connected with the grounding line of the motor through the motor control panel 300, and no additional grounding line is needed, and it can be understood that the grounding connecting portion 320 is electrically connected with the grounding line of the motor, and after the grounding connector 210 is connected with the grounding connecting portion 320, the capacitor metal shell 120 can be grounded, and the capacitor metal shell 120 shares a grounding line with the motor.
[0051] The utility model can realize the grounding connection of the capacitor metal shell 120 when the capacitor 100 and the motor control panel 300 are electrically controlled and assembled, improve the efficiency of the capacitor 100 grounding assembly, no additional grounding line is needed, and through the connection between the capacitor connector 111 and the capacitor connecting portion 310, the connection between the grounding connector 210 and the grounding connecting portion 320 is more stable and firm, and the grounding open circuit phenomenon is avoided.
[0052] In some embodiments, the grounding piece 200 can be integrated with the capacitor metal shell 120.
[0053] In order to realize independent production and processing, and improve the stability of the connection between the grounding piece 200 and the capacitor metal shell 120, in some embodiments, the grounding piece 200 is a ring structure, and the grounding piece 200 is sleeved on the outer peripheral wall of the capacitor metal shell 120, for example Figure 8As shown, the grounding component 200 is a metal ring-shaped component, while the capacitor terminal 111 is a metal column.
[0054] Furthermore, in this embodiment, the grounding component 200 is located on the capacitor metal casing 120 near the power connection terminal 110, so that the structure of the grounding component 200 and the capacitor metal casing 120 is more compact and easier to fix.
[0055] Furthermore, in order to further improve the firmness of the grounding component 200, this embodiment also includes a fastening sleeve 400, which is fitted onto the outer periphery of the capacitor metal shell 120. A limiting part 121 extending outward is provided on the outer periphery of the capacitor metal shell 120. The grounding component 200 is clamped between the fastening sleeve 400 and the limiting part 121. The grounding component 200 is limited and installed between the fastening sleeve 400 and the limiting part 121. The grounding component 200 is electrically connected to the capacitor metal shell 120 through the limiting part 121.
[0056] In this embodiment, the fastening sleeve 400 is an elastic ring structure. In some other embodiments, the fastening sleeve 400 may be a soft metal ring, while in this embodiment, the fastening sleeve 400 is a silicone ring. The cross-section of the silicone ring is circular or elliptical to facilitate assembly. It is held tightly to the outer periphery of the capacitor metal shell 120 by elastic force. In some other embodiments, the fastening sleeve 400 may be a nut sleeve, which is threaded to the outer periphery of the capacitor metal shell 120.
[0057] In some other embodiments, the limiting portion 121 may protrude from the convex ring structure on the outer peripheral wall of the capacitor metal casing 120.
[0058] like Figures 1 to 4 As shown, the outer periphery of the capacitor metal shell 120 near the power terminal 110 in this embodiment is provided with an outwardly folded flange to form a limiting part 121. In this embodiment, the limiting part 121 is formed by folding the upper port of the capacitor metal shell 120. This facilitates manufacturing.
[0059] Furthermore, such as Figures 1 to 4 As shown, in some embodiments, the grounding member 200 is a spring structure 500. The two ends of the spring structure 500 abut against the limiting part 121 and the fastening sleeve 400 respectively. The spring structure 500 is held between the limiting part 121 and the fastening sleeve 400 by the elastic force in the up and down direction, so that the spring structure 500 is held against the limiting part 121.
[0060] like Figure 2 As shown, during assembly, the spring structure 500 and the fastening sleeve 400 can be pre-installed on the metal casing 120 of the capacitor, and then connected to the motor control board 300.
[0061] One end of the spring structure 500 is provided with a spring wire 510 extending upward to form a grounding connector 210. In this embodiment, the spring wire 510 is arranged at the upper end of the spring structure 500 and is connected to the motor control panel 300.
[0062] In other embodiments, as shown in Figure 6 the spring wire 510 is a straight rod structure and is directly connected to the grounding connecting portion 320.
[0063] As shown in Figure 4 and Figure 5 the spring wire 510 of this embodiment includes an inclined section 511 and a straight section 512 connected to each other. The inclined section 511 extends along the side surface of the limiting portion 121, and the straight section 512 extends along the axial direction of the capacitor 100. The straight section 512 is connected to the motor control panel 300, thereby avoiding the limiting portion 121.
[0064] As shown in Figure 4 and Figure 5 the straight section 512 of this embodiment is provided at one end away from the inclined section 511 with a bend 513 arranged in an inverted U shape. The grounding connecting portion 320 is arranged as a grounding jack, and the bend 513 is inserted into the grounding jack. The spring force of the bend 513 can be clamped in the grounding jack to achieve pre-tightening, and then welding is performed for fixation, thereby increasing the firmness of the welding.
[0065] As shown in Figure 7 the capacitor connecting portion 310 of this embodiment includes two elastic clamping strips 311 arranged on the motor control panel 300 with a spacing. The side edges of the two elastic clamping strips 311 facing each other are respectively provided with notches 312. The capacitor connector 111 is inserted into the gap between the two notches 312. The two elastic clamping strips 311 can pre-tighten the capacitor connector 111, and then welding is performed for fixation.
[0066] During assembly, the bend 513 is inserted into the grounding jack, and the capacitor connector 111 is inserted into the gap between the two notches 312, to achieve pre-tightening connection between the motor control panel 300 and the capacitor 100, and then welding is performed for fixation.
[0067] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0068] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the purpose of the present application.
Claims
1. A capacitor grounding structure for soft starting of a single-phase asynchronous motor, characterized by, The capacitor (100) is provided with a plurality of capacitor terminals (111) and a capacitor metal shell (120). The motor control panel (300) is provided with a plurality of capacitor connecting portions (310) and a grounding connecting portion (320). The grounding member (200) is connected to the shell wall of the capacitor metal shell (120), and the grounding member (200) is provided with grounding terminals (210) extending in the same direction as the plurality of capacitor terminals (111).
2. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 1, wherein: the grounding member (200) is in the form of a ring, and the grounding member (200) is sleeved on the shell wall of the capacitor metal shell (120).
3. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 2, wherein: the grounding member (200) is located at a position of the capacitor metal shell (120) close to the plurality of capacitor terminals (111).
4. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 2, further comprising a fastening sleeve (400), wherein the capacitor metal shell (120) is provided with a limiting portion (121) extending outward, the fastening sleeve (400) is sleeved on the outer periphery of the capacitor metal shell (120), and the grounding member (200) is clamped between the fastening sleeve (400) and the limiting portion (121).
5. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 4, wherein: the fastening sleeve (400) is in the form of an elastic ring.
6. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 4, wherein: the outer periphery of one end of the capacitor metal shell (120) close to the capacitor terminal (111) is provided with a flange folded outward to form the limiting portion (121).
7. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 4, wherein: the grounding member (200) is in the form of a spring structure (500), and the two ends of the spring structure (500) abut against the limiting portion (121) and the fastening sleeve (400) respectively.
8. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 7, wherein: one end of the spring structure (500) is provided with a spring wire (510) extending in the same direction as the capacitor terminal (111) to form the grounding terminal (210).
9. The capacitor grounding structure for single-phase asynchronous motor soft start according to claim 8, wherein: The spring wire (510) comprises an inclined section (511) and a straight section (512) connected to each other by bending, the inclined section (511) extends along the limiting portion (121) in an inclined manner, the straight section (512) extends along the axial direction of the capacitor (100), one end of the straight section (512) away from the inclined section (511) is provided with an elbow (513) in an inverted U-shaped bending manner, the grounding connecting portion (320) is a grounding jack, and the elbow (513) is inserted into the grounding jack.
10. The capacitor grounding structure for soft starting of a single-phase asynchronous motor according to claim 1, characterized in that: The capacitor connecting portion (310) comprises two elastic clamping strips (311) which are arranged on the motor electric control panel (300) in a spaced manner, and the side edges of the two elastic clamping strips (311) which face each other are respectively provided with notches (312), and the capacitor connector (111) is inserted between the two notches (312).