Split type high-frequency power supply

Abstract

The utility model provides a split-type high-frequency power supply, which aims at solving the problems of high fault rate and inconvenience in maintenance of the existing medium-high voltage power supply, and comprises a control box and an inverter circuit, and the inverter circuit is connected with the control box for controlling the working state of the inverter circuit; the control box comprises a controller, a first conversion module and a first optical fiber box; the inverter circuit comprises a second optical fiber box, a second conversion module and an inverter loop; a controller in the control box is electrically connected with the first optical fiber box through a first conversion module; the first optical fiber box and the second optical fiber box are connected through optical fibers; the second optical fiber box is connected with a second conversion module used for decoding, and the second conversion module is further connected with the inversion loop; the inverter circuit is further connected with external power consumption equipment, and the control box is located outside the power consumption equipment; the arrangement scene of the existing high-frequency power supply can be changed, the stable operation of the high-frequency power supply is guaranteed, and the failure rate of the high-frequency power supply is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power supplies, in particular to a split-type high-frequency power supply. Background Art

[0002] With the widespread application of high-frequency power supplies in the fields of atmospheric dust particle pollution control, the outlet emission concentration must comply with the requirements of the "Emission Standards of Air Pollutants from Thermal Power Plants" for the emission concentration of smoke from coal-fired power plants, which cannot exceed 30 mg / m³. Among them, high-frequency power supplies are a relatively common dust removal equipment, such as the content shown in the patent with authorization announcement number CN215580871U. Figure 1 As shown, since the high-frequency power supply in the traditional electrostatic precipitator is installed as a whole on the top of the electrostatic precipitator, during operation, the high-frequency power supply itself has a temperature rise, and the temperature of the electrostatic precipitator body is also high, which makes the high-frequency power supply run in a relatively high ambient temperature for a long time. In the long run, there is a great test for the control loop, feedback loop and other loops of the equipment. Especially in summer, the ambient temperature of the dust collector body reaches more than 40 degrees, and the overall temperature rise of the power supply operation, the internal temperature reaches 65-70 degrees, which greatly affects the stable operation of the equipment. After the power supply fails, the maintenance personnel need to go to the top of the dust collector for maintenance. Since the dust collector is generally more than 30 meters high, it is time-consuming and laborious to go up and down, which is extremely inconvenient. Summary of the invention

[0003] The utility model aims to solve the deficiencies of the prior art and provide a split high-frequency power supply.

[0004] In order to solve the above problems, the utility model adopts the following solutions:

[0005] A split high-frequency power supply comprises a control box and an inverter circuit, wherein the inverter circuit is connected to the control box for controlling its working state; the control box comprises a controller, a first conversion module and a first optical fiber box, and the inverter circuit comprises a second optical fiber box, a second conversion module and an inverter circuit; the controller in the control box is electrically connected to the first optical fiber box through the first conversion module; the first optical fiber box and the second optical fiber box are connected through optical fibers; the second optical fiber box is connected to a second conversion module for decoding, and the second conversion module is also connected to the inverter circuit; the inverter circuit is also connected to an external power-consuming device, and the control box is located outside the power-consuming device.

[0006] Furthermore, the inverter circuit includes four IGBTs; the second conversion modules are respectively connected to the gates of the IGBTs in the inverter circuit, and the signals output by the second conversion modules are used to control the on and off of the IGBTs.

[0007] Furthermore, the control box also includes a box body, and the controller and the first optical fiber box are integrated in the box body of the control box.

[0008] Furthermore, it also includes a rectifier circuit and a transformer; wherein the rectifier circuit is connected to an external three-phase power supply, and the rectifier circuit is also connected to an inverter circuit; the inverter circuit is connected to the transformer, and the transformer is connected to an external electrical device.

[0009] Furthermore, the controller also includes a rectifier circuit control part, an inverter circuit control part, a heat dissipation system control part, an analog quantity sampling part and a signal feedback part.

[0010] Furthermore, it also includes a first adapter terminal block and a second adapter terminal block; the first adapter terminal block and the second adapter terminal block are connected via a control cable; the first adapter terminal block is also connected to a controller, and the second adapter terminal block is also connected to a rectifier circuit and a transformer.

[0011] Furthermore, the rectifier circuit, the inverter circuit and the transformer are all located inside the external power-consuming device.

[0012] Furthermore, it also includes a heat dissipation system for dissipating heat for the rectifier circuit. The heat dissipation system is arranged around the rectifier circuit and is connected to the rectifier circuit.

[0013] Furthermore, the heat dissipation system includes a temperature sensor for collecting temperature, and the temperature sensor is arranged close to the rectification circuit.

[0014] Furthermore, the temperature sensor is a thermistor.

[0015] The beneficial effects of the utility model are:

[0016] By setting the first optical fiber box and the second optical fiber box, and cooperating with the first conversion module and the second conversion module, the interference of external components on the transmission signal during operation, such as IGBT, is reduced, thereby providing guarantee for the stable operation of the high-frequency power supply;

[0017] By arranging the control box outside the power-consuming equipment, the control box can be placed in a more suitable environment to avoid the harsh environment of the power-consuming equipment. On the one hand, it ensures the long-term stable operation of the controller and reduces the failure rate. On the other hand, it is also convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the original high-frequency power supply plane structure diagram;

[0019] Figure 2 This is a plan view of the structure of Embodiment 1 of the present utility model;

[0020] Description of the accompanying drawings: 1. Control box; 2. First conversion module; 3. First transfer terminal block; 4. Control cable; 5. Optical fiber; 6. First optical fiber box; 7. Second conversion module; 8. Second optical fiber box; 9. Rectifier circuit; 10. Inverter circuit; 11. Transformer; 12. Second transfer terminal block. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the figures only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0023] Embodiment 1:

[0024] like Figure 2 As shown, a split high-frequency power supply includes a control box 1 and an inverter circuit, wherein the inverter circuit is connected to the control box 1 for controlling its working state; the control box 1 includes a controller, a first conversion module 2 and a first optical fiber box 6, and the inverter circuit includes a second optical fiber box 8, a second conversion module 7 and an inverter circuit 10; the controller in the control box 1 is electrically connected to the first optical fiber box 6 through the first conversion module 2; the first optical fiber box 6 and the second optical fiber box 8 are connected through the optical fiber 5; the second optical fiber box 8 is connected to the second conversion module 7 for decoding, and the second conversion module 7 is also connected to the inverter circuit 10; the inverter circuit is also connected to an external power-consuming device, and the control box 1 is located outside the power-consuming device.

[0025] The inverter circuit 10 includes four IGBTs, which form a bridge circuit. The DC signal is converted into an AC signal through the on-off control of the four IGBTs. The second conversion module 7 is respectively connected to the gates of the IGBTs in the inverter circuit 10, and the signal output by the second conversion module 7 is used to control the on and off of the IGBT. It should be noted that the connection method of the IGBT in the inverter circuit 10 is an existing circuit. The optical fiber 5 is a multimode optical fiber 5, and the transmission bandwidth is greatly improved, which can realize the transmission of simultaneous data.

[0026] The control box 1 also includes a box body, and the controller and the first optical fiber box 6 are integrated in the box body of the control box 1.

[0027] It also includes a rectifier circuit 9 and a transformer 11; wherein the rectifier circuit 9 is connected to an external three-phase power supply, and the rectifier circuit 9 is also connected to an inverter circuit; the inverter circuit is connected to the transformer 11, and the transformer 11 is connected to an external power-consuming device. The rectifier circuit 9 is used to convert the external power supply into direct current and output it to the inverter circuit 10, and then the inverter circuit 10 converts it into alternating current and transmits it to the transformer 11, and finally the transformer 11 outputs it to the set power-consuming device, which in this example is the electrode in the electrostatic precipitator.

[0028] The heat dissipation system is also included for dissipating heat for the rectifier circuit 9, and the heat dissipation system is arranged around the rectifier circuit 9 and connected to the rectifier circuit 9. The heat dissipation system includes a temperature sensor for collecting temperature, and the temperature sensor is arranged near the rectifier circuit 9. The temperature sensor is a thermistor, and it should be noted that in some other embodiments, a thermocouple or an infrared sensor may also be used.

[0029] The controller also includes a rectifier circuit control part, an inverter circuit control part, a heat dissipation system control part, an analog quantity sampling part and a signal feedback part. The rectifier circuit control part is used to control the on and off of the rectifier circuit 9; the inverter circuit control part is used to control the on and off of the IGBT in the inverter circuit; the heat dissipation system control part is used to receive the temperature collected by the temperature sensor in the heat dissipation system and control the working state of the heat dissipation system according to the temperature. It should be noted that controlling the working state of the heat dissipation system such as the heat dissipation fan according to temperature feedback is a prior art.

[0030] It also includes a first adapter terminal block 3 and a second adapter terminal block 12; the first adapter terminal block 3 and the second adapter terminal block 12 are connected via a control cable 4; the first adapter terminal block 3 is also connected to the controller, and the second adapter terminal block 12 is also connected to the rectifier circuit 9 and the transformer 11.

[0031] The rectifier circuit 9, the inverter circuit and the transformer 11 are all located inside the external power-consuming device, in this example, inside the electrostatic precipitator, and close to the top.

[0032] In this example, the control part of the high-frequency power supply at the top of the dust collector is integrated into an independent control box 1, the IGBT drive signal transmission in the inverter circuit 10 is upgraded from the original electrical signal transmission to optical signal transmission, and the original rectifier circuit 9 and transformer 11 at the top of the dust collector are retained. The control box 1 is connected to the original circuits of the high-frequency power supply at the top of the electrostatic precipitator, such as the rectifier circuit 9 and the inverter circuit 10, through the first adapter terminal block 3, the second adapter terminal block 12, the control cable 4, the first optical fiber box 6, the second optical fiber box 8, and the optical fiber 5 to realize control.

[0033] In the above scheme, the top control part of the electrostatic precipitator is integrated into an independent control box 1 and installed in the distribution room outside the electrostatic precipitator. The distribution room maintains a constant temperature and humidity environment all year round, which is suitable for the long-term stable operation of the control system with a low failure rate. Installation in the distribution room is also convenient for maintenance personnel to eliminate faults. The IGBT drive adopts optical transmission drive and is connected through optical fiber 5, which completely prevents the IGBT drive signal from being affected by electromagnetic interference and causing signal abnormality, providing important guarantee for the stable operation of the high-frequency power supply.

[0034] The controller is integrated in an independent control box 1, which includes rectifier circuit control, inverter circuit control, cooling system control, analog quantity sampling, signal feedback, etc.

[0035] In this example, by upgrading the electrical signal to an optical signal for transmission, the controller signal is sent out and converted from an electrical signal to an optical signal through the first conversion module 2, and then connected to the second optical fiber box 8 through the optical fiber 5 through the first optical fiber box 6. The second optical fiber box 8 converts the optical signal back to an electrical signal through the second conversion module 7, and finally sends the signal to the inverter circuit 10.

[0036] During the implementation process, by setting the first fiber optic box 6 and the second fiber optic box 8, cooperating with the first conversion module 2 and the second conversion module 7, the interference of external components on the transmission signal during operation, such as IGBT, is reduced, thereby providing guarantee for the stable operation of the high-frequency power supply; by setting the control box 1 outside the power-consuming equipment, the control box 1 can be placed in a more suitable environment to avoid the harsh environment of the power-consuming equipment. On the one hand, it ensures the long-term stable operation of the controller and reduces the failure rate, and on the other hand, it is also convenient for its maintenance.

[0037] The above description is only a specific example of the utility model and does not constitute any limitation to the utility model. Obviously, for professionals in this field, after understanding the content and principle of the utility model, it is possible to make various modifications and changes in form and details without departing from the principle and structure of the utility model, but these modifications and changes based on the idea of ​​the utility model are still within the scope of protection of the claims of the utility model.

Claims

1. A split high-frequency power supply, comprising a control box (1) and an inverter circuit, wherein the inverter circuit is connected to the control box (1) for controlling its working state; characterized in that: The control box (1) comprises a controller, a first conversion module (2) and a first optical fiber box (6); the inverter circuit comprises a second optical fiber box (8), a second conversion module (7) and an inverter circuit (10); the controller in the control box (1) is electrically connected to the first optical fiber box (6) via the first conversion module (2); the first optical fiber box (6) and the second optical fiber box (8) are connected via an optical fiber (5); the second optical fiber box (8) is connected to a second conversion module (7) for decoding, and the second conversion module (7) is also connected to the inverter circuit (10); the inverter circuit is also connected to an external power-consuming device, and the control box (1) is located outside the power-consuming device.

2. A split high frequency power supply according to claim 1, characterized in that: The inverter circuit (10) comprises four IGBTs; the second conversion modules (7) are respectively connected to the gates of the IGBTs in the inverter circuit (10); and the signal output by the second conversion module (7) is used to control the on and off of the IGBTs.

3. A split high frequency power supply according to claim 1, characterized in that: The control box (1) also comprises a box body, and the controller and the first optical fiber box (6) are integrated in the box body of the control box (1).

4. A split high frequency power supply according to claim 1, characterized in that: It also includes a rectifier circuit (9) and a transformer (11); wherein the rectifier circuit (9) is connected to an external three-phase power supply, and the rectifier circuit (9) is also connected to an inverter circuit; the inverter circuit is connected to the transformer (11), and the transformer (11) is connected to an external electrical device.

5. A split high frequency power supply according to claim 4, characterized in that: It also includes a heat dissipation system for dissipating heat for the rectifier circuit (9); the heat dissipation system is arranged around the rectifier circuit (9), and the heat dissipation system is connected to the rectifier circuit (9).

6. A split high frequency power supply according to claim 5, characterized in that: The heat dissipation system comprises a temperature sensor for collecting temperature, and the temperature sensor is arranged close to the rectification circuit (9).

7. A split high frequency power supply according to claim 6, characterized in that: The controller also includes a rectifier circuit control part, an inverter circuit control part, a heat dissipation system control part, an analog quantity sampling part and a signal feedback part.

8. A split high frequency power supply according to claim 4, characterized in that: It also comprises a first adapter terminal block (3) and a second adapter terminal block (12); the first adapter terminal block (3) and the second adapter terminal block (12) are connected via a control cable (4); the first adapter terminal block (3) is also connected to a controller, and the second adapter terminal block (12) is also connected to a rectifier circuit (9) and a transformer (11).

9. A split high frequency power supply according to claim 4, characterized in that: The rectifier circuit (9), the inverter circuit and the transformer (11) are all located inside the external power-consuming device.

10. A split high frequency power supply according to claim 6, characterized in that: The temperature sensor is a thermistor.

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