Soft starter

Abstract

The utility model belongs to the field of soft starters, and discloses a soft starter which comprises a shell, a heat dissipation piece, a silicon controlled rectifier module, a three-phase power input terminal and a three-phase power output terminal. A mounting cavity is formed in the shell; and the heat dissipation piece is arranged in the mounting cavity so as to solve the problem of heat generated under high-power operation. The silicon controlled rectifier module serves as a core component of the soft starter and is responsible for controlling the starting process of the motor. The silicon controlled rectifier module is directly installed on the heat dissipation piece, the heat dissipation bottom plate of the silicon controlled rectifier module is in close contact with the heat dissipation piece, it is ensured that heat can be conducted to the heat dissipation piece from the silicon controlled rectifier module and then dissipated to the outside through the heat dissipation piece, heat dissipation efficiency is improved, and the service life of the silicon controlled rectifier module is effectively prolonged. The three-phase power input terminal is electrically connected to the input end of the silicon controlled rectifier module, and the three-phase power output terminal is electrically connected to the load end of the silicon controlled rectifier module, so that the input and output of electric energy are realized, and the motor can be started and operated according to a preset mode.

Description

TECHNICAL FIELD

[0001] The utility model belongs to starter technical field, more specifically, relate to a soft starter. BACKGROUND

[0002] In the field of power electronic devices, soft starters, as an important electrical control device, are widely used in motor starting processes to achieve smooth and gradual starting, effectively reducing the impact of starting current on the power grid, and protecting the motor from damage caused by excessive torque. Its core function lies in gradually increasing the voltage in the motor stator winding by controlling the frequency and amplitude of the output voltage or current, allowing the motor to start rotating at low speed and gradually accelerate to the rated speed, thereby improving the reliability and safety of motor starting. However, with the rapid development of industrial automation and the continuous improvement of motor power, the heat generated by soft starters during operation also increases, which poses higher requirements for the heat dissipation design of soft starters. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a soft starter to solve the technical problem of poor heat dissipation effect of the soft starter in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0005] A soft starter is provided, comprising:

[0006] A housing having a mounting cavity;

[0007] A heat dissipation member disposed in the mounting cavity;

[0008] A silicon controlled module mounted on the heat dissipation member, with the heat dissipation bottom plate of the silicon controlled module in contact with the heat dissipation member;

[0009] A three-phase power input terminal electrically connected to the input end of the silicon controlled module;

[0010] A three-phase power output terminal electrically connected to the load end of the silicon controlled module.

[0011] As a further improvement of the above technical solution:

[0012] Optionally, it further comprises a three-phase power bypass terminal in contact with the three-phase power input terminal and electrically connected to the input end of the silicon controlled module.

[0013] Optionally, the three-phase power input terminal comprises a first pad portion and a first pin portion, and the three-phase power bypass terminal comprises a second pad portion and a second pin portion, wherein the first pin portion and the second pin portion both extend to the outside of the housing, and the first pad portion and the second pad portion are in contact with each other.

[0014] Optionally, at least one of the three-phase electric output terminal, the three-phase electric input terminal and the three-phase electric bypass terminal is an aluminum terminal.

[0015] Optionally, the heat dissipation member comprises a substrate portion and a fin portion, the fin portion is arranged on one side of the substrate portion, and the thyristor module is arranged on the other side of the substrate portion.

[0016] Optionally, a heat dissipation fan is further arranged on the shell, and the fin portion is arranged at an air outlet of the heat dissipation fan.

[0017] Optionally, a plurality of air holes are further arranged on the shell, and positions of the air holes correspond to positions of the fin portion.

[0018] Compared with the prior art, the soft starter has the following beneficial effects:

[0019] The soft starter provided by the application comprises a shell, a heat dissipation member, a thyristor module, a three-phase electric input terminal and a three-phase electric output terminal. The shell has an installation cavity inside, which provides a stable installation environment for internal components. The shell has sufficient structural firmness and electromagnetic shielding and protection levels, so that the soft starter can stably operate in various industrial environments. The heat dissipation member is arranged in the installation cavity to cope with heat generated during high-power operation. The heat dissipation member is made of a material with high thermal conductivity, so that the heat dissipation member can absorb and disperse heat from the internal components, effectively reducing the overall working temperature of the soft starter. The thyristor module is a core component of the soft starter and is responsible for controlling the starting process of the motor. The thyristor module is directly installed on the heat dissipation member, and the heat dissipation bottom plate of the thyristor module is in close contact with the heat dissipation member, so that heat can be conducted from the thyristor module to the heat dissipation member and then dissipated to the outside through the heat dissipation member, which not only improves the heat dissipation efficiency but also effectively prolongs the service life of the thyristor module. The three-phase electric input terminal is electrically connected to the input end of the thyristor module, and the three-phase electric output terminal is electrically connected to the load end of the thyristor module, so as to realize input and output of electric energy and ensure that the motor can start and operate in a predetermined manner. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a partial enlarged structure schematic view of the soft starter of the present application;

[0022] Figure 2 is a front structural schematic diagram of the soft starter of the present application;

[0023] Figure 3 is a perspective structural schematic diagram of the soft starter of the present application.

[0024] In the drawings, various elements are designated by reference numbers followed by various letters. Like reference numbers and letters refer to like elements throughout.

[0025] 1, housing; 11, mounting cavity;

[0026] 2, heat dissipation member; 21, base plate portion;

[0027] 22, fin portion; 3, silicon controlled module;

[0028] 4, three-phase electric input terminal; 41, first pad portion;

[0029] 42, first pin portion; 5, three-phase electric output terminal;

[0030] 6, three-phase electric bypass terminal; 61, second pad portion;

[0031] 62, second pin portion; 7, heat dissipation fan;

[0032] 8, air hole. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0037] Unless otherwise defined, all professional terms used herein have the same meaning as understood by a person skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present application.

[0038] As shown in Figures 1 to 3 The present application provides a soft starter, which comprises a housing 1, a heat dissipation member 2, a silicon controlled module 3, a three-phase power input terminal 4 and a three-phase power output terminal 5.

[0039] The housing 1 has a mounting cavity 11 inside, which provides a stable mounting environment for internal components. The housing 1 not only has sufficient structural rigidity, but also takes into account the electromagnetic shielding and protection level, ensuring that the soft starter can operate stably in various industrial environments. The heat dissipation member 2 is arranged in the mounting cavity 11 to cope with the heat generated under high-power operation. The heat dissipation member 2 is made of a material with high thermal conductivity, such as aluminum alloy or copper alloy, so that it can absorb and disperse the heat from the internal components, effectively reducing the overall operating temperature of the soft starter. The silicon controlled module 3, as the core component of the soft starter, is responsible for controlling the starting process of the motor. The silicon controlled module 3 is directly mounted on the heat dissipation member 2, with its heat dissipation bottom plate in close contact with the heat dissipation member 2, ensuring that the heat can be conducted from the silicon controlled module 3 to the heat dissipation member 2, and then dissipated to the outside through the heat dissipation member 2, which not only improves the heat dissipation efficiency, but also effectively prolongs the service life of the silicon controlled module 3. The three-phase power input terminal 4 is electrically connected to the input end of the silicon controlled module 3, and the three-phase power output terminal 5 is electrically connected to the load end of the silicon controlled module 3, realizing the input and output of electric energy and ensuring that the motor can start and run in a predetermined manner.

[0040] As shown in Figures 1 to 3 In one specific embodiment of the present application, the soft starter further comprises a three-phase power bypass terminal 6, which is in contact with the three-phase power input terminal 4 and is electrically connected to the input end of the silicon controlled module 3. In this way, the soft starter not only provides smooth current control during the starting phase, but also effectively reduces the impact on the power grid.

[0041] As shown in Figure 1As shown, in one specific embodiment of the present application, the three-phase power input terminal 4 specifically comprises a first pad portion 41 and a first pin portion 42, and the three-phase power bypass terminal 6 specifically comprises a second pad portion 61 and a second pin portion 62, both the first pin portion 42 and the second pin portion 62 extend to the outside of the shell 1, so as to facilitate the connection with the external power supply or load. The first pad portion 41 and the second pad portion 61 are in contact with each other, not only ensuring the reliability of the electrical connection, but also being able to reduce the electrical failure that may be caused by poor contact.

[0042] In one specific embodiment of the present application, at least one of the three-phase power output terminal 5, the three-phase power input terminal 4 and the three-phase power bypass terminal 6 is an aluminum terminal. The aluminum terminal, with its excellent electrical conductivity, ensures the efficiency and stability of the current during transmission, which is crucial to meet the high load flow demand. At the same time, the lightweight characteristics of aluminum help to reduce the weight of the entire electrical system, which has a positive significance to improve the overall performance and energy efficiency of the equipment. What is particularly important is that the aluminum terminal exhibits excellent heat dissipation capability, its good thermal conductivity can quickly dissipate the heat generated during operation, thereby effectively solving the heating problem caused by long-term high-load operation of the terminal, avoiding the electrical failure that may be caused by overheating, and further improving the safety and reliability of the system.

[0043] As shown in the drawings, Figure 1 In one specific embodiment of the present application, the heat dissipation member 2 comprises a substrate portion 21 and a fin portion 22. The fin portion 22 is provided on one side of the substrate portion 21, and the fin portion 22 can accelerate heat dissipation by increasing the heat dissipation area to transfer the heat absorbed on the substrate portion 21 to the surrounding environment. The thyristor module 3 is installed on the other side of the substrate portion 21, ensuring that the heat on the thyristor module 3 can be directly transferred to the fin portion 22 through the substrate portion 21. When the thyristor module 3 generates heat during operation, these heat will be quickly absorbed by the substrate portion 21, and then effectively dissipated through the heat dissipation effect of the fin portion 22, thereby ensuring that the thyristor module 3 can stably operate at a lower temperature, prolonging its service life and improving the reliability and stability of the soft starter.

[0044] As shown in the drawings, Figure 1 In one specific embodiment of the present application, the soft starter further comprises a heat dissipation fan 7, which is installed on the shell 1, and the fin portion 22 is located at the air outlet of the heat dissipation fan 7. When the heat dissipation fan 7 is started, the airflow will directly blow from the air outlet to the fin portion 22, taking away the heat accumulated on the fin portion 22, and quickly dissipating the heat to the surrounding environment through air convection.

[0045] As shown in the drawings, Figure 1 and Figure 3As shown, in one specific embodiment of the present application, the shell 1 is further provided with a plurality of air holes 8, which are located corresponding to the fin portions 22, so as to ensure that air can smoothly pass through the air holes 8 and form effective heat exchange with the fin portions 22, thereby not only accelerating heat dissipation, but also improving heat dissipation efficiency, so that the heat dissipation area of the fin portions 22 is fully utilized.

[0046] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A soft starter, characterized in that, include: The housing (1) has a mounting cavity (11); A heat sink (2) is disposed in the mounting cavity (11); A thyristor module (3) is installed on the heat sink (2), and the heat sink base plate of the thyristor module (3) is in contact with the heat sink (2); The three-phase input terminal (4) is electrically connected to the input terminal of the thyristor module (3); The three-phase output terminal (5) is electrically connected to the load terminal of the thyristor module (3); It also includes a three-phase power bypass terminal (6), which is in contact with the three-phase power input terminal (4) and electrically connected to the input terminal of the thyristor module (3).

2. The soft starter as described in claim 1, characterized in that, The three-phase power input terminal (4) includes a first pad portion (41) and a first pin portion (42), and the three-phase power bypass terminal (6) includes a second pad portion (61) and a second pin portion (62). The first pin portion (42) and the second pin portion (62) both extend to the outside of the housing (1), and the first pad portion (41) and the second pad portion (61) overlap and contact each other.

3. The soft starter as described in claim 1, characterized in that, At least one of the three-phase output terminal (5), the three-phase input terminal (4), and the three-phase bypass terminal (6) is an aluminum terminal.

4. The soft starter as described in any one of claims 1 to 3, characterized in that, The heat sink (2) includes a substrate (21) and a fin (22). The fin (22) is disposed on one side of the substrate (21), and the thyristor module (3) is mounted on the other side of the substrate (21).

5. The soft starter as described in claim 4, characterized in that, It also includes a cooling fan (7), which is mounted on the housing (1), and the fin portion (22) is located at the air outlet of the cooling fan (7).

6. The soft starter as described in claim 5, characterized in that, The housing (1) also has a plurality of vent holes (8), the positions of which correspond to the positions of the fin portion (22).

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