Novel alternating current power supply isolation system and method

Abstract

The invention relates to a novel AC power supply isolation system and method, and the system comprises a housing and an internal circuit, the internal circuit is installed in the housing, the internal circuit comprises an AC filtering assembly and a display control terminal, the AC filtering assembly is connected with the display control terminal, and the AC filtering assembly is used for filtering a power supply. And the display control terminal receives data in the navigation system through various interfaces at the back of the equipment, obtains final data through analysis, operation and processing of an operating system, and displays the data on a liquid crystal screen. The filter assembly is well shielded and grounded, the routing distance of the alternating-current power line is reduced, interference of radiation generated on an alternating-current power line on display signals is avoided, and therefore the integrity of the display signals of the display screen is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of isolated power supplies, and in particular, to a novel AC power isolation system and method. Background Art

[0002] Electromagnetic Compatibility (EMC):

[0003] In the definition of the International Electrotechnical Commission (IEC) standard for electromagnetic compatibility, it is defined as: a system or device can work normally in the electromagnetic environment where it is located, and at the same time, it will not cause interference to other systems and devices.

[0004] EMC includes two parts: EMI (electromagnetic interference) and EMS (electromagnetic tolerance). The so-called EMI electromagnetic interference refers to the electromagnetic noise generated by a machine itself during the process of performing its due functions that is unfavorable to other systems; while EMS refers to the ability of a machine not to be affected by the surrounding electromagnetic environment during the process of performing its due functions.

[0005] Electromagnetic Compatibility (EMC) refers to the normal working ability of various electrical or electronic devices to meet the design requirements with a specified safety factor in a common space with a complex electromagnetic environment. It is also called electromagnetic compatibility. Its meaning includes:

[0006] ① The mutual consideration between electronic systems or devices in the electromagnetic environment;

[0007] ② Electronic systems or devices can work normally according to the design requirements in the natural electromagnetic environment. If extended to the impact of the electromagnetic field on the ecological environment, the content of the electromagnetic compatibility discipline can also be called environmental electromagnetics.

[0008] The research on electromagnetic compatibility has gradually developed with the needs of the gradual development of electronic technology towards high frequency, high speed, high precision, high reliability, high sensitivity, high density (miniaturization, large-scale integration), high power, small signal application, complexity, etc. Especially after a large number of modern electronic technologies are adopted in artificial earth satellites, missiles, computers, communication equipment, and submarines, the electromagnetic compatibility problem becomes more prominent.

[0009] Electromagnetic compatibility is related to the safety and reliability of equipment. With the development of technology, electronic devices are becoming more and more miniaturized, integrated, and multifunctional, which exacerbates the complexity of the electromagnetic environment and makes the importance of electromagnetic compatibility increasingly prominent. All-in-one devices have a built-in display screen, have high requirements for the display effect, have a small equipment space, and the display cable is affected by the electromagnetic interference of the AC power supply, which is extremely likely to cause the display screen to have a mosaic or water ripple effect, affecting the display effect of the equipment and unable to meet the use requirements. Summary of the Invention

[0010] The object of the present invention is to overcome the deficiencies of the prior art and propose a new type of AC power isolation system and method, which performs good shielding and grounding treatment on the filter components, reduces the wiring distance of the AC power line, and at the same time avoids the interference of the radiation generated on the AC power line to the display signal, so as to ensure the integrity of the display signal of the display screen.

[0011] The present invention solves its technical problems by adopting the following technical solutions:

[0012] A new type of AC power isolation system includes a chassis and an internal circuit, wherein the internal circuit is installed inside the chassis. The internal circuit includes an AC filter component and a display control terminal. The AC filter component is connected to the display control terminal. The AC filter component is used to filter the power supply. The display control terminal receives data in the navigation system through various interfaces at the back of the device, and obtains the final data after parsing, calculating, and processing by the operating system, and displays the data on the liquid crystal screen.

[0013] Moreover, the display control terminal includes a power conversion module, a main board module, a display switching module, a dimming circuit, a large keyboard board, a small keyboard board, a front panel USB, a display screen AD board, and a display screen. The AC filter component is connected to the power conversion module through a power line. The power conversion module is respectively connected to the main board module and the display screen AD board through power lines. The display screen AD board is connected to the display screen through a power line. The main board module is respectively connected to the display switching module, the dimming circuit, the large keyboard board, and the front panel USB. The display switching module is connected to the display screen AD board. The dimming circuit is sequentially connected to the large keyboard board and the small keyboard board. The large keyboard board is connected to the display screen.

[0014] Moreover, the power conversion module is used to convert alternating current into direct current used by the system. The main board module is used to parse, calculate, and process data. The display switching module is used to perform display switching. The dimming circuit is used to perform dimming settings. The large keyboard board and the small keyboard board are used for data input and control. The front panel USB is used to connect external USB devices. The display screen AD board is used to fix the display screen. The display screen is used to display data.

[0015] Moreover, the AC filter component includes a power socket, a fuse, and a filter. Among them, the power socket, the fuse, and the filter are connected in sequence. The power socket is used to input 220V AC power. The fuse is used for overload protection, short-circuit protection, and fire prevention. The filter is used to filter the input 220V power supply.

[0016] A power isolation method for a new type of AC power isolation system includes the following steps:

[0017] Step 1: Construct an AC filter component;

[0018] Step 2: Install the AC filter component on one side of the AC power isolation system;

[0019] Step 3: Connect the chassis and the ground with a grounding copper plate to ensure the grounding performance of the components inside the filtering module.

[0020] Moreover, the specific implementation method of the said Step 1 is: The input line and the output line of the AC filtering module are set separately. Meanwhile, short leads are used for the capacitors in the AC filtering module, and the outside of the AC filtering module is sealed with a metal shell to prevent the AC power supply from radiating the display signal and causing double images in the display.

[0021] Moreover, the specific implementation method of the said Step 2 is: Install the AC filtering module at the power interface of the AC power isolation system.

[0022] The advantages and positive effects of the present invention are:

[0023] The present invention includes a chassis and an internal circuit, wherein the internal circuit is installed inside the chassis. The internal circuit includes an AC filtering module and a display control terminal. The AC filtering module is connected to the display control terminal. The AC filtering module is used to filter the power supply. The display control terminal receives the data in the navigation system through various interfaces at the back of the device, and obtains the final data after parsing, calculating, and processing by the operating system, and then displays the data on the liquid crystal screen. By performing good shielding and grounding treatment on the filter module, the present invention reduces the wiring distance of the AC power line, and at the same time avoids the interference of the radiation generated on the AC power line to the display signal, thereby ensuring the integrity of the display signal on the display screen. Description of the Drawings

[0024] Figure 1 is the system structure diagram of the present invention;

[0025] Figure 2 is the physical diagram of the system of the present invention

[0026] Figure 3 is the structure diagram of the AC filtering module of the present invention;

[0027] Figure 4 is the schematic diagram inside the chassis of the present invention. Detailed Embodiment

[0028] The following further describes the present invention with reference to the drawings.

[0029] A new type of AC power isolation system, as Figure 1 and 2As shown in the figure, it includes a housing and an internal circuit. The internal circuit is installed inside the housing. The internal circuit includes an AC filtering component and a display and control terminal. The AC filtering component is connected to the display and control terminal. The AC filtering component is used to filter the power supply. The main function of the display and control terminal is to receive data in the navigation system through various interfaces at the back of the device, and obtain the final data after being parsed, calculated, and processed by the operating system. The data is displayed on the liquid crystal screen. At the same time, through control components such as a customized keyboard or an electronic handwheel input, the data is processed and calculated accordingly, and finally the function of displaying or sending data through the device interface is realized.

[0030] The display and control terminal includes a power conversion module, a main board module, a display switching module, a dimming circuit, a large keyboard board, a small keyboard board, a front panel USB, a display screen AD board, and a display screen. The AC filtering component is connected to the power conversion module through a power cord. The power conversion module is respectively connected to the main board module and the display screen AD board through power cords. The display screen AD board is connected to the display screen through a power cord. The main board module is respectively connected to the display switching module, the dimming circuit, the large keyboard board, and the front panel USB. The display switching module is connected to the display screen AD board. The dimming circuit is sequentially connected to the large keyboard board and the small keyboard board. The large keyboard board is connected to the display screen.

[0031] The power conversion module is used to convert alternating current into direct current for system use. The main board module is used to parse, calculate, and process data. The display switching module is used to perform display switching. The dimming circuit is used to perform dimming settings. The large keyboard board and the small keyboard board are used for data input and control. The front panel USB is used to connect external USB devices. The display screen AD board is used to fix the display screen. The display screen is used to display data.

[0032] As Figure 3 and Figure 4 As shown in the figure, the AC filtering component includes a power socket, a fuse, and a filter. Among them, the power socket, the fuse, and the filter are sequentially connected. The power socket is used to input 220V AC power. The fuse is used for overload protection, short-circuit protection, and fire prevention. The filter is used to filter the input 220V power supply.

[0033] The design principle of the AC filtering component is: perform electromagnetic shielding on the AC filtering component and minimize the length of the AC power cord:

[0034] (1) The power line filter should be installed as close as possible to the device power interface, and do not let the power cord without passing through the filter meander inside the device frame;

[0035] (2) The leads of the capacitors in the filter should be as short as possible to avoid resonance at low frequencies due to the inductive reactance and capacitive reactance of the leads;

[0036] (3) When a large short - circuit current passes through the grounding wire of the filter, it will cause additional electromagnetic radiation. Therefore, good shielding and grounding treatment should be carried out on the filter component itself;

[0037] (4) The input and output lines of the filter cannot cross, otherwise crosstalk will be caused due to the input - output capacitance coupling path of the filter, thus reducing the filtering characteristics. Usually, the method is to add a partition or shielding layer between the input and output.

[0038] A power isolation method for a new type of AC power isolation system includes the following steps:

[0039] Step 1: Construct an AC filter component.

[0040] The input line and output line of the AC filter component are set separately. At the same time, short leads are used for the capacitors in the AC filter component, and the outside of the AC filter component is sealed with a metal shell to prevent the AC power supply from radiating display signals and causing double - imaging on the display.

[0041] Step 2: Install the AC filter component on one side of the AC power isolation system.

[0042] Install the AC filter component at the power interface of the AC power isolation system.

[0043] Step 3: Connect the chassis and the ground together with a grounding copper plate to ensure the grounding performance of the devices inside the filter component.

[0044] Through the above settings, the present invention greatly improves the display quality of the display - control terminal, improves the display quality, and meets the usage requirements. The present invention reduces the wiring distance of the AC power line by performing good shielding and grounding treatment on the filter component, and at the same time avoids the interference of the radiation generated on the AC power line to the display signal, thereby ensuring the integrity of the display signal on the display screen.

[0045] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation manners. Any other implementation manners obtained by those skilled in the art according to the technical solution of the present invention also belong to the scope of protection of the present invention.

Claims

1. A novel AC power isolation system, characterized in that: It includes a casing and an internal circuit, wherein the internal circuit is installed inside the casing, the internal circuit includes an AC filter component and a display and control terminal, wherein the AC filter component is connected to the display and control terminal, the AC filter component is used to filter the power supply, the display and control terminal receives the data in the navigation system through various interfaces at the rear of the device, obtains the final data through analysis, calculation and processing by the operating system, and displays the data on the LCD screen.

2. A novel AC power isolation system according to claim 1, characterized in that: The display and control terminal includes a power conversion module, a mainboard module, a display switching module, a dimming circuit, a large keyboard board, a small keyboard board, a front panel USB, a display screen AD board and a display screen, wherein the AC filter component is connected to the power conversion module through a power line, the power conversion module is respectively connected to the mainboard module and the display screen AD board through power lines, the display screen AD board is connected to the display screen through a power line, the mainboard module is respectively connected to the display switching module, the dimming circuit, the large keyboard board and the front panel USB, the display switching module is connected to the display screen AD board, the dimming circuit is sequentially connected to the large keyboard board and the small keyboard board, and the large keyboard board is connected to the display screen.

3. A novel AC power isolation system according to claim 2, characterized in that: The power conversion module is used to convert alternating current into direct current used by the system, the mainboard module is used to parse, calculate and process data, the display switching module is used to switch the display, the dimming circuit is used to set the dimming, the large keyboard and the small keyboard are used for data input and control, the front panel USB is used to connect an external USB device, the display AD board is used to fix the display, and the display is used to display data.

4. The novel AC power isolation system according to claim 1 is characterized in that: The AC filter component includes a power socket, a fuse and a filter, wherein the power socket, the fuse and the filter are connected in sequence, the power socket is used to input a 220V AC power supply, the fuse is used for overload protection, short circuit protection and fire prevention, and the filter is used to filter the input 220V power supply.

5. A power isolation method for a novel AC power isolation system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Build AC filter components; Step 2: Install the AC filter assembly on one side of the AC power isolation system; Step 3: Use a grounding copper plate to connect the chassis and the ground in series to ensure the grounding performance of the components in the filter assembly.

6. The method of a novel AC power isolation system according to claim 5, characterized in that: The specific implementation method of step 1 is: the input line and the output line of the AC filter component are set separately, and the capacitor in the AC filter component uses short leads. The AC filter component is sealed with a metal shell to prevent the AC power supply from radiating the display signal and causing double images on the display.

7. The method of a novel AC power isolation system according to claim 5, characterized in that: The specific implementation method of step 2 is: installing the AC filter component at the power interface of the AC power isolation system.

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