Electric precipitation high-voltage pulse power supply charging power panel

Abstract

The utility model relates to the technical field of power panels, in particular to an electric precipitation high-voltage pulse power charging power panel which comprises a substrate main body, an IGBT module is arranged on the substrate main body, the substrate main body is further fixed to a heat dissipation plate through multiple sets of connecting pieces, and electronic components on the substrate main body are located on the side face, away from the heat dissipation plate, of the substrate main body. And a heat dissipation gap with the width of 0.75-1.5 cm is formed between the heat dissipation plate and the substrate main body. According to the electric precipitation high-voltage pulse power supply charging power panel, the heat dissipation plate is fixed through the multiple sets of connecting pieces, the heat dissipation area can be increased through the heat dissipation plate, the cold and heat exchange speed can be increased, and therefore airflow near the heat dissipation gaps can be rapidly cooled, and meanwhile the airflow inlet and outlet speed is increased through the design of the heat dissipation gaps; in the operation process of a plurality of electronic components, a large amount of heat generated can be dissipated in time, so that the heat dissipation effect of the power panel is obviously improved.

Description

Technical Field

[0001] This application relates to the field of power supply board technology, and in particular to a high-voltage pulse power supply charging power supply board for electrostatic precipitators. Background Technology

[0002] The high-voltage pulse power supply box for electrostatic precipitators is a new generation of power supply products from Guangjin. It primarily uses the GAC-520 controller as the central control component and IGBTs as the main control devices. Utilizing modulation and demodulation technology, it drives different types of rectifier transformers to achieve high-frequency power supply functionality, providing the highest corona power to the electrostatic precipitator's electric field, maximizing the excitation potential of the electric field, and improving dust removal efficiency. The core technology component of the high-voltage pulse power supply box is the charging power board.

[0003] For example, Chinese patent CN206673626U discloses a universal electric vehicle charging station with stacked regulated power supplies, including at least two parallel circuits. Each parallel circuit includes an AC contactor, an AC / DC converter, an IGBT module, a high-frequency transformer, a rectifier, a voltage regulator, and a control switch connected in sequence. The output of each parallel circuit is electrically connected to a universal charging plug. The control switch is electrically connected to the intelligent control center of the charging pile. The input of the AC contactor is electrically connected to a 220V power supply.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and require improvement:

[0005] When commonly used in high-voltage pulse power supply boxes for electrostatic precipitators, charging power boards have complex functions and require the installation of many electronic components. As a result, they generate a lot of heat during operation. If this heat cannot be dissipated in time, it can easily lead to abnormal or unstable operation of the charging power board, or even direct failure. Utility Model Content

[0006] This application provides a high-voltage pulse power supply charging board for electrostatic precipitators to improve the following technical problems:

[0007] When common charging power boards are used in high-voltage pulse power supply boxes for electrostatic precipitators, they generate a lot of heat during operation. If this heat cannot be dissipated in time, it can easily lead to abnormal or unstable operation of the charging power board, or even direct failure.

[0008] This application provides a high-voltage pulse power supply charging board for electrostatic precipitators, which adopts the following technical solution:

[0009] A high-voltage pulse power supply charging board for electrostatic precipitators includes a substrate body, on which an IGBT module is disposed. The substrate body is also fixed to a heat sink plate by multiple sets of connectors. The electronic components on the substrate body are located on the side of the substrate body away from the heat sink plate. A heat dissipation gap of 0.75-1.5 cm is formed between the heat sink plate and the substrate body.

[0010] In one feasible technical solution of this application, the connector includes a support column and a locking bolt. The support column is vertically connected to the heat sink plate and has an internal thread. The base plate body has a hole adapted to the locking bolt, and the locking bolt passes through the hole and is threaded into the support column.

[0011] In one feasible technical solution of this application, the outer contour of the cross-section of the support column is a regular polygon, and both the support column and the locking bolt are stainless steel parts.

[0012] In one feasible technical solution of this application, the heat sink is provided with multiple heat sink fins and two side plates on the side away from the substrate body, and the multiple heat sink fins are arranged at intervals between the two side plates.

[0013] In one feasible technical solution of this application, the thickness of the heat dissipation fins gradually decreases along the direction away from the substrate body, and the two sides of the heat dissipation fins are provided with a plurality of spaced protrusions forming a wavy surface.

[0014] In one feasible technical solution of this application, the substrate body is further provided with:

[0015] A DC-DC power converter is used to convert external high-voltage DC power into 24V low-voltage DC power.

[0016] The IGBT drive and protection circuit module is used to isolate and process the pulse control signal and generate the IGBT drive signal, and to monitor and protect the operation of the IGBT module. When a fault occurs during operation, an alarm signal is fed back.

[0017] An isolated power supply module is used to convert 24V low-voltage DC power into isolated +15V and -9V voltages;

[0018] The input / output interface module is used to complete three-phase power input and high-frequency AC power output, control signal input and alarm signal output, and to perform level conversion and buffering on the input control signals and output alarm signals;

[0019] A three-phase uncontrolled rectifier circuit module is used to rectify three-phase AC power into DC pulse voltage;

[0020] A pre-charge circuit module is used to pre-charge the filter capacitor; and,

[0021] The filter circuit module is used to filter the DC output from the rectified circuit.

[0022] In one feasible technical solution of this application, the IGBT module is also electrically connected to a spike absorption circuit module, which is used to absorb the spike voltage generated when the IGBT module switches to protect the IGBT module.

[0023] In one feasible technical solution of this application, the IGBT module is also electrically connected to a resonant circuit module, which is used to resonate and adapt the high-frequency AC power output by the IGBT module.

[0024] In one feasible technical solution of this application, the multiple filter capacitors in the filter circuit module are first connected in series and then in parallel, and an equalizing resistor is added to ensure that the voltage distribution of the capacitors is balanced.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] Without affecting the installation and operation of electronic components, a heat sink is fixed by multiple sets of connectors. The heat sink can increase the heat dissipation area and improve the heat exchange rate, thereby quickly cooling the airflow near the heat dissipation gap. At the same time, the design of the heat dissipation gap also increases the airflow speed. During the operation of many electronic components, a large amount of heat generated can be dissipated in time, thus significantly improving the heat dissipation effect of the power board and effectively ensuring the normal operation and stable operation of the charging power board. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the high-voltage pulse power supply charging power board for electrostatic precipitators according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the connector structure in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the substrate body in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Substrate body; 100. IGBT module; 200. DC power converter; 300. IGBT drive and protection circuit module; 400. Isolated power supply module; 500. Input / output interface module; 600. Three-phase uncontrolled rectifier circuit module; 700. Pre-charge circuit module; 800. Filter circuit module; 900. Spike absorption circuit module; 1000. Resonant circuit module;

[0033] 2. Connecting parts; 21. Support column; 22. Locking bolt; 23. Threaded rod;

[0034] 3. Heat sink; 31. Heat sink fins; 311. Wavy surface; 32. Side plate. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0040] This application discloses a high-voltage pulse power supply charging board for electrostatic precipitators. (Refer to...) Figure 1-3The electrostatic precipitator high-voltage pulse power supply charging power board includes a substrate body 1, on which an IGBT module 100 is disposed. The substrate body 1 is also fixed to a heat sink 3 by multiple sets of connectors 2. The electronic components on the substrate body 1 are located on the side of the substrate body 1 away from the heat sink 3. A heat dissipation gap of 0.75-1.5 cm is formed between the heat sink 3 and the substrate body 1.

[0041] In this embodiment, the connector 2 includes a support column 21 and a locking bolt 22. The support column 21 is vertically connected to the heat sink 3. The support column 21 has an internal thread. The base plate body 1 has a hole adapted to the locking bolt 22. The locking bolt 22 passes through the hole and is threaded into the support column 21. That is, the length of the support column 21 is the width of the heat dissipation gap. In addition, in order to facilitate the installation and fixing of the support column 21, the bottom of the support column 21 is also provided with a threaded rod 23 threaded onto the heat sink 3. The outer contour of the cross section of the support column 21 is a regular polygon, and both the support column 21 and the locking bolt 22 are stainless steel parts.

[0042] The heat sink 3 designed above has a simple structure, is easy to assemble, and is firmly connected, making it less likely to cause loosening between the substrate body 1 and the heat sink 3.

[0043] In this embodiment, the heat sink 3 is an aluminum alloy part or a pure copper part. The heat sink 3 has multiple heat sink fins 31 and two side plates 32 vertically arranged on the side away from the substrate body 1. The multiple heat sink fins 31 are arranged at intervals between the two side plates 32. The thickness of the heat sink fins 31 gradually decreases along the direction away from the substrate body 1, and multiple spaced protrusions are provided on both sides of the heat sink fins 31 to form a wave surface 311.

[0044] The heat sink 3 designed above has a simple and robust structure and a large contact area with cold air, thus achieving better heat dissipation.

[0045] In this embodiment, to ensure the functional integrity of the substrate body 1, the substrate body 1 is further provided with:

[0046] DC-DC power converter 200 is used to convert external high-voltage DC power into 24V low-voltage DC power;

[0047] The IGBT drive and protection circuit module 300 is used to isolate and process the pulse control signal and generate the IGBT drive signal, and to monitor and protect the operation of the IGBT module 100. When a fault occurs during operation, an alarm signal is fed back.

[0048] The isolated power supply module 400 is used to convert 24V low-voltage DC power into isolated +15V and -9V voltages;

[0049] The input / output interface module 500 is used to complete three-phase power input and high-frequency AC power output, control signal input and alarm signal output, and to perform level conversion and buffering on the input control signals and output alarm signals.

[0050] The three-phase uncontrolled rectifier circuit module 600 is used to rectify three-phase AC power into DC pulse voltage.

[0051] Pre-charge circuit module 700 is used to pre-charge the filter capacitor; and,

[0052] The filter circuit module 800 is used to filter the DC power output from the rectified circuit. The multiple filter capacitors in the filter circuit module 800 are connected in series and then in parallel, and an equalizing resistor is added to ensure that the voltage distribution of the capacitors is balanced.

[0053] The IGBT module 100 is also electrically connected to a spike absorption circuit module 900, which is used to absorb the spike voltage generated when the IGBT module 100 switches to protect the IGBT module 100. The IGBT module 100 is also electrically connected to a resonant circuit module 1000, which is used to resonate and adapt the high-frequency AC power output by the IGBT module 100.

[0054] The beneficial technical effects of the electrostatic precipitator high-voltage pulse power supply charging power board of this application embodiment are roughly as follows:

[0055] Without affecting the installation and operation of electronic components, a heat sink 3 is fixed by multiple sets of connectors 2. The heat sink 3 can increase the heat dissipation area and improve the heat exchange rate, thereby quickly cooling the airflow near the heat dissipation gap. At the same time, the design of the heat dissipation gap also increases the speed of airflow in and out. During the operation of many electronic components, a large amount of heat generated can be dissipated in time, thus significantly improving the heat dissipation effect of the power board and effectively ensuring the normal operation and stable operation of the charging power board.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-voltage pulse power supply charging board for electrostatic precipitators, comprising a substrate body (1), wherein an IGBT module (100) is disposed on the substrate body (1), characterized in that, The substrate body (1) is also fixed to the heat sink (3) by multiple sets of connectors (2). The electronic components on the substrate body (1) are located on the side of the substrate body (1) away from the heat sink (3). A heat dissipation gap of 0.75-1.5 cm is formed between the heat sink (3) and the substrate body (1).

2. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 1, characterized in that, The connector (2) includes a support column (21) and a locking bolt (22). The support column (21) is vertically connected to the heat sink (3). The support column (21) has an internal thread. The substrate body (1) has a hole adapted to the locking bolt (22). The locking bolt (22) passes through the hole and is threaded into the support column (21).

3. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 2, characterized in that, The cross-sectional outer contour of the support column (21) is a regular polygon, and both the support column (21) and the locking bolt (22) are stainless steel parts.

4. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 1, characterized in that, The heat sink (3) has multiple heat sink fins (31) and two side plates (32) vertically arranged on the side away from the substrate body (1), with the multiple heat sink fins (31) spaced apart between the two side plates (32).

5. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 4, characterized in that, The thickness of the heat dissipation fins (31) gradually decreases in the direction away from the substrate body (1), and the two sides of the heat dissipation fins (31) are provided with a plurality of spaced protrusions forming a wave surface (311).

6. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 1, characterized in that, The substrate body (1) is also provided with: DC power converter (200) for converting external high-voltage DC power into 24V low-voltage DC power; The IGBT drive and protection circuit module (300) is used to isolate and process the pulse control signal and generate the IGBT drive signal, and to monitor and protect the operation of the IGBT module (100). When a fault occurs during operation, an alarm signal is fed back. An isolated power supply module (400) is used to convert 24V low-voltage DC power into isolated +15V and -9V voltages; The input / output interface module (500) is used to complete three-phase power input and high-frequency AC power output, control signal input and alarm signal output, and to perform level conversion and buffering on the input control signals and output alarm signals; A three-phase uncontrolled rectifier circuit module (600) is used to rectify three-phase AC power into DC pulse voltage; A pre-charge circuit module (700) is used to pre-charge the filter capacitor; as well as, The filter circuit module (800) is used to filter the DC power output from the rectified circuit.

7. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 6, characterized in that, The IGBT module (100) is also electrically connected to a spike absorption circuit module (900), which is used to absorb the spike voltage generated when the IGBT module (100) is switched on and off to protect the IGBT module (100).

8. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 7, characterized in that, The IGBT module (100) is also electrically connected to a resonant circuit module (1000), which is used to resonate and adapt the high-frequency AC power output by the IGBT module (100).

9. The electrostatic precipitator high-voltage pulse power supply charging power board according to claim 6, characterized in that, The filter circuit module (800) contains multiple filter capacitors connected in series and then in parallel, and an equalizing resistor is added to ensure that the voltage distribution of the capacitors is balanced.

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