Strong starting auxiliary device for single-phase motor

Abstract

The utility model discloses a single-phase motor strong starting auxiliary device, and relates to the technical field of motor auxiliary starting. Comprising an auxiliary unit used for assisting starting, the auxiliary unit is provided with a wiring terminal, and the wiring terminal is connected to a wiring box of the single-phase motor through a wiring bus; the auxiliary unit is characterized in that the auxiliary unit is provided with a contactor and a CBB60 capacitor, a control coil of the contactor is connected with a centrifugal switch of the single-phase motor in series through the wiring bus, a main contact of the contactor is connected with the CBB60 capacitor in series and then is connected with an operation capacitor of the single-phase motor in parallel through the wiring bus, and the main contact of the contactor is connected with the CBB60 capacitor in parallel. A main contact of the contactor is a normally open contact; the number of the CBB60 capacitors is 3-5, and the CBB60 capacitors are arranged in parallel. According to the utility model, the problem that the starting capacitor of the large flywheel in the crusher is easy to overheat and even burst can be solved, and the safety and efficiency of the single-phase motor during large-load starting are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor auxiliary starting, and particularly relates to a single-phase motor strong starting auxiliary device. Background Art

[0002] After the transformation and upgrading of the rural power grid, the power supply in rural areas has been significantly enhanced, which has brought unprecedented development opportunities to the small and medium-sized breeding industry. Many farmers have invested in various types of feed grinders to improve the efficiency and quality of feed processing. However, due to the difficulty of accessing three-phase electricity, most of the grinders selected by these farmers are equipped with single-phase motors. Although single-phase motors have advantages in cost and installation, their lack of power has become a bottleneck restricting the improvement of grinder performance, resulting in unsatisfactory feed grinding effects and difficulty in meeting the high standards of feed quality required by farmers.

[0003] In order to solve this problem, some studies have proposed adding a large flywheel to the working shaft of the crusher to increase the system's moment of inertia. In theory, this improvement can significantly increase the output and crushing effect of the crusher. However, although the addition of the flywheel can improve the crushing efficiency, it also brings new problems. Due to the increase in the moment of inertia, the acceleration process of the single-phase motor at startup becomes slower, resulting in a longer start-up time. This not only increases the wear of the starting centrifugal switch, but may also cause the starting capacitor (usually a CD capacitor) to overheat or even burst, thus limiting the widespread application of large flywheels in crushers.

[0004] Therefore, there is an urgent need for a device that can help a single-phase motor to start powerfully. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned defects and propose a single-phase motor strong starting auxiliary device, which can solve the problem that the starting capacitor of the large flywheel in the crusher is prone to overheating and even bursting, thereby ensuring the safety and efficiency of the single-phase motor when starting a large load.

[0006] The specific technical solutions are as follows:

[0007] A powerful starting auxiliary device for a single-phase motor comprises an auxiliary unit for assisting the starting of the single-phase motor, wherein the auxiliary unit is provided with a contactor and a CBB60 capacitor, wherein the contactor and the CBB60 capacitor are arranged in series, and the auxiliary unit is connected to the single-phase motor through a wiring harness, and the control coil of the contactor is connected in series with the centrifugal switch of the single-phase motor, and the contactor and the CBB60 capacitor are connected in series and then connected in parallel with the running capacitor of the single-phase motor; the main contact of the contactor is a normally open contact; and the number of the CBB60 capacitors is 3-5 and the CBB60 capacitors are arranged in parallel.

[0008] Preferably, the auxiliary unit comprises a terminal T1, a terminal T2, a terminal T3 and a terminal T4, the control coil of the contactor is connected between the terminal T1 and the terminal T4, and the main contact of the contactor and the CBB60 capacitor are connected between the terminal T2 and the terminal T3;

[0009] The terminal T1, terminal T2, terminal T3 and terminal T4 are connected to the terminal box of the single-phase motor through a wiring harness, so that the terminal T1 and the terminal T2 are located at both ends of the main winding, the terminal T2 and the terminal T3 are located at both ends of the running capacitor, the terminal T2 and the terminal T4 are located at both ends of the centrifugal switch, and the terminal T1 and the terminal T3 are connected to the terminal box and are located at both ends of the secondary winding.

[0010] Preferably, the auxiliary unit is provided with an electronic centrifugal switch, a contactor and a CBB60 capacitor, the electronic centrifugal switch is used to replace the centrifugal switch of the single-phase motor; the auxiliary unit is connected to the single-phase motor through a wiring harness; after the contactor is connected in series with the CBB60 capacitor, it is connected in parallel with the running capacitor of the single-phase motor; the electronic centrifugal switch includes a first lead wire, a second lead wire, a third lead wire and a fourth lead wire, the first lead wire and the second lead wire are used to connect to the two ends of the main winding of the single-phase motor, the third lead wire is used to connect to between the running capacitor and the auxiliary winding, and the fourth lead wire is used to form an on-off loop with the second lead wire; the first lead wire and the fourth lead wire are connected to the two ends of the control coil of the contactor; the main contact of the contactor is a normally open contact; the number of the CBB60 capacitors is 3-5 and the CBB60 capacitors are connected in parallel.

[0011] Preferably, the contactor is a solid state relay.

[0012] Preferably, the auxiliary unit comprises an auxiliary box body for mounting the contactor and the CBB60 capacitor; and the auxiliary box body is provided with wiring terminals for connecting to a wiring harness.

[0013] Preferably, the CBB60 capacitors are all arranged on a transfer board located in the auxiliary unit.

[0014] Preferably, the auxiliary box body is provided with a support frame corresponding to the installation of the single-phase motor, and the support frame is provided with a mounting hole.

[0015] Preferably, the CBB60 capacitor can be replaced by a CBB65 capacitor.

[0016] Preferably, the auxiliary unit is provided with a power line access terminal of the single-phase motor, which is used to replace the power access of the single-phase motor junction box.

[0017] Preferably, the wiring harness is composed of multiple cables or a single cable with multiple independent cores.

[0018] Compared with the existing technology, the beneficial effects of the utility model are:

[0019] The utility model can solve the problem of capacitor bursting of existing single-phase motors when facing heavy loads, such as when starting a large flywheel, and can solve the problem of burnout of the motor disconnect switch by replacing the CD60 capacitor that is easy to burst with a CBB60 capacitor; by adopting a contactor to increase a stage of drive, a centrifugal switch is used to control a contactor, and the contactor is used to control the separation of the running capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the auxiliary unit startup circuit diagram;

[0021] Figure 2 It is the wiring diagram of auxiliary unit and single-phase motor terminal box;

[0022] Figure 3 It is a schematic diagram of the installation implementation of the auxiliary unit;

[0023] Figure 4 This is another wiring structure diagram of the auxiliary unit;

[0024] Figure 5 This is the wiring diagram when the auxiliary unit uses a solid-state relay;

[0025] Figure 6 This is the wiring diagram when the auxiliary unit adopts an electronic centrifugal switch;

[0026] Figure 7 This is a wiring diagram when the auxiliary unit uses solid-state relays and electronic centrifugal switches.

[0027] Among them, 10-auxiliary unit, 11-main contact of contactor, 12-control coil of contactor, 13-CBB60 capacitor, 14-solid-state relay, 15-electronic centrifugal switch, 20-junction box, 21-main winding, 22-auxiliary winding, 23-running capacitor, 24-centrifugal switch, 30-single-phase motor. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the implementation mode of the utility model in conjunction with the accompanying drawings in the specification, so that the purpose, technical scheme and technical effect of the utility model are more clearly presented.

[0029] Example 1

[0030] like Figure 1As shown, this embodiment discloses a single-phase motor strong starting auxiliary device, including an auxiliary unit 10 for assisting the starting of the single-phase motor, the auxiliary unit is provided with a contactor and a CBB60 capacitor 13, the contactor and the CBB60 capacitor 13 are arranged in series, the auxiliary unit is connected to the single-phase motor 30 through a wiring harness, and the control coil 12 of the contactor is connected in series with the centrifugal switch 24 of the single-phase motor, and the contactor and the CBB60 capacitor 13 are connected in series and then connected in parallel with the running capacitor 23 of the single-phase motor; the main contact 11 of the contactor is a normally open contact; the CBB60 capacitors 13 are 3 and the CBB60 capacitors 13 are arranged in parallel.

[0031] pass Figure 2 The detailed wiring conditions of the auxiliary unit 10 and the single-phase motor 30 terminal box 20 can be known. Among them, the auxiliary unit includes terminal T1, terminal T2, terminal T3 and terminal T4, the control coil 12 of the contactor is connected between terminal T1 and terminal T4, and the main contact 11 of the contactor and the CBB60 capacitor 13 are connected between terminal T2 and terminal T3. The single-phase motor 30 terminal box 20 is generally provided with 6 terminal points, and components or lines connected between the terminal points are drawn between the terminal points, such as the main winding 21, the auxiliary winding 22, the centrifugal switch 24, the running capacitor 23, etc., as shown in detail. Figure 2 shown.

[0032] according to Figure 2 The specific wiring relationship is:

[0033] The terminals T1 and T2 of the auxiliary unit are connected to the two ends T1′ and T2′ of the main winding 21 in the junction box 20 through the wiring harness, and the terminals T2 and T3 are connected to the two ends T2′ and T3′ of the running capacitor 23 in the junction box 20 through the wiring harness. The terminals T2 and T4 are connected to the two ends T2′ and T4′ of the centrifugal switch 24 in the junction box 20. The terminals T1 and T3 are connected to the two ends T1′ and T3′ of the secondary winding 22 in the junction box 20.

[0034] In terms of specific wiring, when the single-phase motor 30 that needs to use the auxiliary unit 10 is connected externally through the junction box 20 of the single-phase motor 30, such as Figure 3 As shown in the figure, the wiring harness is composed of 4 independent cables.

[0035] Specifically, the auxiliary unit includes an auxiliary box body for mounting the contactor and the CBB60 capacitor 13, and the auxiliary box body is provided with a wiring terminal for connecting with the wiring harness. The CBB60 capacitor 13 is arranged on an adapter board located in the auxiliary unit 10, specifically on an adapter board in the auxiliary box body.

[0036] To facilitate the installation of the auxiliary box body, the auxiliary box body is provided with a support frame corresponding to the installation of the single-phase motor 30, and the support frame is provided with a mounting hole. The auxiliary box body is provided with a base, the base is provided with a mounting slot for installation and fixing, and the auxiliary box body is provided with a flip cover for opening the auxiliary box body.

[0037] It should be clear here that the utility model is aimed at the problem of bursting of the starting capacitor of the existing single-phase motor 30 when facing a large load, such as starting a large flywheel. It is an auxiliary starting device. Specifically, the single-phase motor 30 is connected to the power supply and first docked with the auxiliary unit 10, and then the auxiliary unit 10 is docked with the terminal box 20 of the single-phase motor 30. This will not change the installation application of the existing motor, and it is more convenient to use and install, which can well meet the needs of existing problems.

[0038] Example 2

[0039] like Figure 4 As shown, in this embodiment, the auxiliary unit 10 is mainly provided with a power line access terminal for the single-phase motor 30. Specifically, it includes: an auxiliary unit 10 for auxiliary starting, and an access terminal and a wiring terminal are provided on the auxiliary unit 10, and the access terminal is used to access the power supply of the single-phase motor. The auxiliary unit 10 is provided with a contactor and a CBB60 capacitor 13, the control coil 12 of the contactor is connected in series with the centrifugal switch 24 of the single-phase motor, the main contact 11 of the contactor is connected in series with the CBB60 capacitor 13, and is connected in parallel with the running capacitor 23 of the single-phase motor; the CBB60 capacitor 13 is 5 and the CBB60 capacitors 13 are arranged in parallel. The contactor is an electromagnetic contactor, and the main contact 11 of the contactor is a normally open contact.

[0040] In terms of specific wiring, the auxiliary unit includes an access terminal L and an access terminal N, wherein the access terminal L is connected to the live wire of the power supply and the access terminal zero is connected to the neutral wire of the power supply. The wiring terminals include a wiring terminal T1, a wiring terminal T2, a wiring terminal T3 and a wiring terminal T4, wherein the control coil 12 of the contactor is connected between the wiring terminal T1 and the wiring terminal T4, and the main contact 11 of the contactor and the CBB60 capacitor 13 are connected between the wiring terminal T2 and the wiring terminal T3; the access terminal L is connected to the wiring terminal T1, and the access terminal N is connected to the wiring terminal T2.

[0041] The terminal is connected to the two-phase capacitor single-phase electrical junction box 20 of the single-phase motor 30, wherein the terminal T1 and the terminal T2 are connected to the two ends of the main winding 21 in the junction box 20, the terminal T2 and the terminal T3 are connected to the two ends of the running capacitor 23 in the junction box 20, the terminal T2 and the terminal T4 are connected to the two ends of the centrifugal switch 24 in the junction box 20, and the terminal T1 and the terminal T3 are connected to the two ends of the secondary winding 22 in the junction box 20.

[0042] Example 3

[0043] like Figure 5 As shown, this embodiment provides another electronic centrifugal switch replacement solution, specifically: the auxiliary unit 10 is provided with an electronic centrifugal switch 15, a contactor and a CBB60 capacitor 13, and the electronic centrifugal switch 15 is used to replace the centrifugal switch 24 of the single-phase motor 30. The auxiliary unit 10 is connected to the single-phase motor 30 through a wiring harness; after the contactor is connected in series with the CBB60 capacitor 13, it is connected in parallel with the running capacitor 23 of the single-phase motor 30. The electronic centrifugal switch 15 includes a first lead wire, a second lead wire, a third lead wire and a fourth lead wire, the first lead wire and the second lead wire are used to connect to the two ends of the main winding 21 of the single-phase motor 30, the third lead wire is used to connect to the running capacitor 23 and the secondary winding 22, and the fourth lead wire is used to form an on-off circuit with the second lead wire; the first lead wire and the fourth lead wire are connected to the two ends of the control coil 12 of the contactor. The main contact of the contactor is a normally open contact. There are 4 CBB60 capacitors 13 and the CBB60 capacitors 13 are arranged in parallel.

[0044] according to Figure 5 The specific wiring relationship is:

[0045] The terminals T1 and T2 of the auxiliary unit 10 are connected to the two ends T1′ and T2′ of the main winding 21 in the junction box 20 through the wiring harness, and the terminals T2 and T3 are connected to the two ends T2′ and T3′ of the running capacitor 23 in the junction box 20 through the wiring harness. The terminals T1 and T3 are connected to the two ends T1′ and T3′ of the secondary winding 22 in the junction box 20.

[0046] The electronic centrifugal switch 15 generally has four lead wires, red, black, blue and white. In this embodiment, the first lead wire is a red wire, the second lead wire is a black wire, the third lead wire is a blue wire and the fourth lead wire is a white wire. Figure 5 The wiring method shown should be clear that different models have different specific lead wires, and should be adjusted according to the specific lead wire conditions. The embodiment only provides one preferred method.

[0047] Before use, if a single-phase motor 30 is newly connected, it should be ensured that the original centrifugal switch 24 of the single-phase motor is disconnected, and the original starting capacitor can also be disconnected.

[0048] The electronic centrifugal switch 15 uses an electronic sensor to detect the speed of the motor and automatically switches the circuit when the preset speed is reached, thereby realizing the start and stop control of the motor. This switch provides an efficient and reliable motor protection mechanism by accurately controlling the running state of the motor. The utility model provides a starting auxiliary device containing an electronic centrifugal switch 15, so that it can cope with different situations of existing single-phase motors in operation, such as long-term operation, insensitive centrifugal switches, and single-phase motors installed in high-power equipment; the above scheme can ensure auxiliary starting of single-phase motors.

[0049] Example 4

[0050] like Figure 6 As shown, in this embodiment, based on the embodiment 1, the contactor is replaced with a solid-state relay 14. The specific solution is:

[0051] This embodiment includes an auxiliary unit 10 for assisting the start of a single-phase motor. The auxiliary unit is provided with a solid-state relay 14 and a CBB65 capacitor, and the power supply end of the solid-state relay 14 is arranged in series with the CBB60 capacitor 13. The auxiliary unit is connected to the single-phase motor 30 through a wiring harness, and the control end of the solid-state relay 14 is connected in series with the centrifugal switch 24 of the single-phase motor, and the solid-state relay 14 and the CBB65 capacitor are connected in series and then connected in parallel with the running capacitor 23 of the single-phase motor. The solid-state relay 14 is normally open, and there are three CBB65 capacitors, and the CBB65 capacitors are arranged in parallel.

[0052] according to Figure 6 The specific wiring relationship is:

[0053] The terminals T1 and T2 of the auxiliary unit are connected to the two ends T1′ and T2′ of the main winding 21 in the junction box 20 through the wiring harness, and the terminals T2 and T3 are connected to the two ends T2′ and T3′ of the running capacitor 23 in the junction box 20 through the wiring harness. The terminals T2 and T4 are connected to the two ends T2′ and T4′ of the centrifugal switch 24 in the junction box 20. The terminals T1 and T3 are connected to the two ends T1′ and T3′ of the secondary winding 22 in the junction box 20. The wiring here is basically the same as that in Example 1. The solid-state relay 14 and the CBB65 capacitor are first connected to the terminals T1, T2, T3, and T4 respectively, and then the above wiring is performed.

[0054] Example 5

[0055] like Figure 7 As shown, this embodiment is based on the embodiment 3, and the contactor is replaced by a solid-state relay 14. The connection between the solid-state relay 14 and the electronic centrifugal switch 15 is basically the same as the contactor, and the connection between the auxiliary unit and the junction box is the same as the embodiment 3, which will not be repeated here.

[0056] However, it should be clear that the solid-state relay 14 and the electronic centrifugal switch 15 can make the performance of the starting auxiliary device more stable, and different combinations of the solid-state relay 14 and the electronic centrifugal switch 15 can be selected according to the situation of the single-phase motor to meet different working conditions.

[0057] The above embodiments are only provided as a reference, especially for the wiring of the junction box of a single-phase motor. The embodiments are only provided as an optimal implementation application. The original wiring conditions of the junction boxes in single-phase motors of different models and brands are different, and the terminal break settings are different. Therefore, the connection relationship of the utility model protection scheme should be used as the basis for adaptive wiring.

[0058] The above description is only the preferred feasible embodiment of the utility model and is not intended to limit the scope of the patent application of the utility model. All equivalent changes, equivalent substitutions or modified changes within the technical spirit and principles suggested by the utility model should be included in the scope of patent protection covered by the utility model.

Claims

1. A single-phase motor powerful starting auxiliary device, comprising an auxiliary unit for assisting the starting of the single-phase motor, characterized in that: The auxiliary unit is provided with a contactor and a CBB60 capacitor, which are arranged in series. The auxiliary unit is connected to the single-phase motor through a wiring harness, and the control coil of the contactor is connected in series with the centrifugal switch of the single-phase motor, and the contactor and the CBB60 capacitor are connected in series and connected in parallel with the running capacitor of the single-phase motor; the main contact of the contactor is a normally open contact; the number of the CBB60 capacitors is 3-5 and the CBB60 capacitors are arranged in parallel.

2. A single-phase motor powerful starting auxiliary device according to claim 1, characterized in that: The auxiliary unit includes a terminal T1, a terminal T2, a terminal T3 and a terminal T4, the control coil of the contactor is connected between the terminal T1 and the terminal T4, and the main contact of the contactor and the CBB60 capacitor are connected between the terminal T2 and the terminal T3; The terminal T1, terminal T2, terminal T3 and terminal T4 are connected to the terminal box of the single-phase motor through a wiring harness, so that the terminal T1 and the terminal T2 are located at both ends of the main winding, the terminal T2 and the terminal T3 are located at both ends of the running capacitor, the terminal T2 and the terminal T4 are located at both ends of the centrifugal switch, and the terminal T1 and the terminal T3 are connected to the terminal box and are located at both ends of the secondary winding.

3. A single-phase motor powerful starting auxiliary device according to claim 1, characterized in that: The auxiliary unit is provided with an electronic centrifugal switch, a contactor and a CBB60 capacitor, wherein the electronic centrifugal switch is used to replace the centrifugal switch of the single-phase motor; the auxiliary unit is connected to the single-phase motor through a wiring harness; after the contactor and the CBB60 capacitor are arranged in series, they are connected in parallel with the running capacitor of the single-phase motor; the electronic centrifugal switch comprises a first lead wire, a second lead wire, a third lead wire and a fourth lead wire, wherein the first lead wire and the second lead wire are used to be connected to both ends of the main winding of the single-phase motor, the third lead wire is used to be connected between the running capacitor and the auxiliary winding, and the fourth lead wire is used to form an on-off circuit with the second lead wire; the first lead wire and the fourth lead wire are connected to both ends of the control coil of the contactor.

4. A single-phase motor powerful starting auxiliary device according to claim 1 or 3, characterized in that: The contactor is a solid state relay.

5. A single-phase motor powerful starting auxiliary device according to claim 1 or 3, characterized in that: The auxiliary unit comprises an auxiliary box body for mounting the contactor and the CBB60 capacitor; and the auxiliary box body is provided with wiring terminals for connecting with a wiring harness.

6. A single-phase motor powerful starting auxiliary device according to claim 1 or 3, characterized in that: The CBB60 capacitors are all arranged on a transfer board located in the auxiliary unit.

7. A single-phase motor powerful starting auxiliary device according to claim 5, characterized in that: The auxiliary box body is provided with a support frame corresponding to the installation of the single-phase motor, and the support frame is provided with a mounting hole.

8. A single-phase motor powerful starting auxiliary device according to any one of claims 1-3, characterized in that: The CBB60 capacitors may be replaced with CBB65 capacitors.

9. A single-phase motor powerful starting auxiliary device according to claim 1, characterized in that: The auxiliary unit is provided with a power line access terminal of the single-phase motor, which is used to replace the power access of the single-phase motor junction box.

10. A single-phase motor powerful starting auxiliary device according to claim 1, characterized in that: The wiring harness is composed of multiple cables or a single cable with multiple independent cores.

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