Dual high-voltage power supply independent control module

Abstract

The utility model provides a kind of two-way high-voltage power independent control module, comprising: metal shielding casing, its inside is equipped with mutually isolated first chamber and second chamber;First high-voltage generating unit, first control unit and first isolated communication module are arranged in first chamber;Second high-voltage generating unit, second control unit and second isolated communication module are arranged in second chamber;First control unit is connected with second control unit by time-sharing control circuit, and the time-sharing control circuit includes photoelectric coupler array and frequency divider timer;Metal shielding casing top is equipped with detachable high-voltage terminal, bottom integrated heat dissipation fin array, both sides are provided with ventilation grid.The utility model, the first chamber and the second chamber separated by the metal shielding casing arranged, cooperate magnetic isolation transformer, photoelectric coupler array etc., realize physical isolation and electrical interlock double protection, effectively prevent the crosstalk between two-way high-voltage power, improve system stability.

Description

Technical Field

[0001] This utility model relates to the field of high voltage power supply applications, specifically to a dual-channel high voltage power supply independent control module. Background Technology

[0002] In the field of high-voltage power supply applications, traditional dual-channel high-voltage power supply control modules often face problems such as severe crosstalk, poor heat dissipation, difficult maintenance, and low operational safety. With the increasing demands for stability, reliability, and safety of high-voltage power supplies from electronic equipment and industrial applications, there is an urgent need for a new type of dual-channel high-voltage power supply control module that can effectively solve these problems. In existing technologies, some modules fail to adequately consider electrical isolation and interlocking mechanisms, easily leading to mutual interference between the two outputs; unreasonable heat dissipation structure design causes performance degradation due to excessive temperature during prolonged operation; and the lack of effective fault monitoring and visual alarm functions increases the risks and maintenance difficulties.

[0003] To address this, a dual-channel high-voltage power supply independent control module is proposed. Utility Model Content

[0004] The present invention aims to solve the problems mentioned in the background art by providing a dual-channel high-voltage power supply independent control module.

[0005] The specific technical solution is as follows:

[0006] A dual-channel high-voltage power supply independent control module includes:

[0007] A metal shielding shell, which has a first chamber and a second chamber that are isolated from each other;

[0008] The first high-voltage generating unit, the first control unit, and the first isolation communication module are disposed in the first chamber;

[0009] The second high-voltage generating unit, the second control unit, and the second isolation communication module are located in the second chamber.

[0010] The first control unit and the second control unit are connected via a time-division control circuit, which includes an optocoupler array and a frequency divider timer.

[0011] The metal shielding housing has a detachable high-voltage terminal on the top, an integrated heat dissipation fin array at the bottom, and ventilation grilles on both sides;

[0012] in:

[0013] The input terminal of the first high-voltage generating unit is connected to an external power supply through a PTC thermistor overvoltage protector, and the output terminal is connected to the first channel of the high-voltage terminal block.

[0014] The communication terminal of the first control unit is connected to the main control system through a magnetic isolation transformer, and its ADC sampling terminal is connected to the feedback terminal of the first high voltage generating unit.

[0015] The optocoupler array of the time-division control circuit is bidirectionally connected to the GPIO ports of the two control units, and the CLKOUT pin of the frequency divider timer is connected to the interrupt pin of the two control units.

[0016] As a preferred embodiment of this utility model, an air gap isolation strip of more than 0.5mm is provided between the primary and secondary sides of the magnetic isolation transformers of the first isolation communication module and the second isolation communication module.

[0017] As a preferred embodiment of this utility model, the time-sharing control circuit includes a digital potentiometer array, whose chip select signal terminal is connected to a mechanical interlocking mechanism. The interlocking mechanism includes a linked double-pole double-throw switch to ensure that the two high-voltage outputs are not in the adjustment state at the same time.

[0018] As a preferred embodiment of this utility model, the heat dissipation fin array is arranged in a wave-like staggered pattern, with a spacing of 2-3 mm between adjacent fins, and a thermally conductive graphite sheet is embedded at the bottom. This thermally conductive graphite sheet is welded to the metal shielding shell and electrically isolated from the high-voltage ground plane.

[0019] As a preferred embodiment of this utility model, the high-voltage terminal is made of ceramic-based composite insulating material, and the multi-layer shielding rings embedded inside it are arranged such that the innermost ring is connected to the high-voltage output terminal, the outermost ring is grounded, and the spacing between each layer is arranged according to the 1 / 4 wavelength impedance matching principle.

[0020] In a preferred embodiment of this utility model, both the first control unit and the second control unit integrate a state detection circuit, which includes:

[0021] Hall current sensor connected in series in the high voltage output circuit

[0022] A temperature-compensated voltage divider resistor network connected in parallel between the high-voltage output terminal and ground.

[0023] And a fault indicator LED array connected to the PWM pin of the control unit at the drive end.

[0024] As a preferred embodiment of this utility model, the conductive shielding coating on the inner wall of the metal shielding shell is connected to the shell through a multi-point grounding wire. The coating is composed of silver-copper alloy particles and epoxy resin, and has a thickness of 0.2-0.3 mm.

[0025] As a preferred embodiment of this utility model, a PTC thermistor overvoltage protector is embedded in the Z-shaped flow channel between the first chamber and the second chamber, and the protector is connected in series on the power input line of the two high-voltage generating units.

[0026] As a preferred embodiment of this utility model, the optocoupler array of the time-division control circuit includes two pairs of anti-parallel PC817 optocouplers, wherein:

[0027] The input terminals of the first optocoupler group (U1, U2) are connected to the first control unit GPIO1, and the output terminals are connected to the interrupt pin of the second control unit.

[0028] The input terminals of the second optocoupler group (U3, U4) are connected to the second control unit GPIO2, and the output terminals are connected to the interrupt pin of the first control unit.

[0029] The common node of all optocoupler outputs is connected to the enable terminal (EN) of the frequency divider timer.

[0030] This utility model has the following beneficial effects:

[0031] 1. High-reliability electrical isolation: The first and second chambers are separated by a metal shielded shell, and together with a magnetic isolation transformer and optocoupler array, a dual protection of physical isolation and electrical interlocking is achieved, which effectively prevents crosstalk between the two high-voltage power supplies and improves system stability.

[0032] 2. High-efficiency heat dissipation design: The combination of wave-shaped staggered heat dissipation fin array, ventilation grid and thermally conductive graphite sheet optimizes the heat dissipation path, accelerates heat dissipation, and ensures stable performance of the module under long-term operation.

[0033] 3. Safety protection mechanism: The PTC thermistor overvoltage protector, mechanical interlock mechanism (double-pole double-throw switch) and status detection circuit work together to achieve multiple protections such as overvoltage, overcurrent and short circuit. Combined with the visual fault alarm function, it improves the safety of use and the convenience of maintenance.

[0034] 4. Strong electromagnetic compatibility: The conductive shielding coating on the inner wall of the metal shielding housing and the multi-layer shielding ring design of the high-voltage terminals effectively suppress electromagnetic interference and high-frequency radiation, enhancing the electromagnetic compatibility of the module.

[0035] 5. Precise control and interlocking: The time-sharing control circuit realizes hardware-level forced time-sharing operation of dual high-voltage output through optocoupler array and frequency divider timer, which simplifies timing control logic and ensures operation uniqueness and control precision. Attached Figure Description

[0036] Figure 1 A schematic diagram of the structure of the dual-channel high-voltage power supply independent control module provided in this embodiment of the utility model.

[0037] Attached Figure

[0038] 1. Metal shielding housing; 11. First chamber; 12. Second chamber; 21. First high-voltage generating unit; 22. Second high-voltage generating unit; 31. First control unit; 32. Second control unit; 41. First isolation communication module; 42. Second isolation communication module; 6. High-voltage terminal block; 7. Heat sink array; 71. Thermally conductive graphite sheet; 8. Ventilation grid; 15. PTC thermistor overvoltage protector. Detailed Implementation

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0041] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0043] The dual-channel high-voltage power supply independent control module provided in this embodiment, such as... Figure 1 As shown, it includes:

[0044] The metal shielding housing 1 has a first chamber 11 and a second chamber 12 that are isolated from each other.

[0045] The first high-voltage generating unit 21, the first control unit 31, and the first isolation communication module 41 are installed in the first chamber 11;

[0046] The second high-voltage generating unit 22, the second control unit 32, and the second isolation communication module 42 are installed in the second chamber 12;

[0047] The first control unit 31 and the second control unit 32 are connected by a time-division control circuit, which includes an optocoupler array and a frequency divider timer.

[0048] The metal shielding housing 1 has a detachable high-voltage terminal 6 on the top, an integrated heat dissipation fin array 7 on the bottom, and ventilation grilles 8 on both sides;

[0049] in:

[0050] The input terminal of the first high-voltage generating unit 21 is connected to an external power supply through a PTC thermistor overvoltage protector 15, and the output terminal is connected to the first channel of the high-voltage terminal block 6.

[0051] The communication terminal of the first control unit 31 is connected to the main control system through a magnetic isolation transformer, and its ADC sampling terminal is connected to the feedback terminal of the first high voltage generating unit 21.

[0052] The optocoupler array of the time-division control circuit is bidirectionally connected to the GPIO ports of the two control units, and the CLKOUT pin of the frequency divider timer is connected to the interrupt pin of the two control units.

[0053] The above technical solution divides the metal casing into electrically isolated dual chambers. Each chamber independently integrates a high-voltage generating unit, a control unit, and a magnetically isolated communication module. The time-sharing control circuit achieves dual-channel interlocking through an optocoupler array and a frequency divider timer. The casing integrates heat sink fins, ventilation grilles, and detachable high-voltage terminals. Simultaneously, the high-voltage unit input is protected by a PTC, and the control unit is connected to the GPIO and interrupt pins through magnetically isolated communication and optocoupler connection. Physical isolation and electrical interlocking can prevent crosstalk. The modular structure can improve maintainability and heat dissipation efficiency, and the time-sharing control can ensure the uniqueness of operation.

[0054] Specifically, in this embodiment, an air gap isolation strip of 0.5 mm or more is provided between the primary and secondary sides of the magnetic isolation transformers of the first isolation communication module 41 and the second isolation communication module 42. Providing an air gap isolation strip of ≥0.5 mm between the primary and secondary sides of the magnetic isolation transformer can improve insulation strength, suppress arc discharge, and simultaneously reduce distributed capacitance using air as the dielectric.

[0055] Specifically, in this embodiment, the time-sharing control circuit includes a digital potentiometer array, whose chip select signal terminal is connected to a mechanical interlocking mechanism. This interlocking mechanism includes a linked double-pole double-throw switch to ensure that the two high-voltage outputs are not simultaneously in an adjustable state. By connecting the digital potentiometer chip select terminal to the mechanical interlocking mechanism (double-pole double-throw switch), simultaneous adjustment of both circuits can be avoided through physical forced interlocking. This combination of mechanical and electrical protection against misoperation ensures safety and reliability.

[0056] Specifically, in this embodiment, the heat dissipation fin array 7 is arranged in a wavy, staggered pattern, with an adjacent fin spacing of 2-3 mm. A thermally conductive graphite sheet 71 is embedded at the bottom, which is welded to the metal shielding shell 1 and electrically isolated from the high-voltage ground plane. By setting the wavy, staggered heat dissipation fins (spacing 2-3 mm) and simultaneously welding the thermally conductive graphite sheet at the bottom and isolating it from the high-voltage ground, the airflow path can be optimized to improve heat dissipation efficiency. The thermally conductive graphite sheet also ensures even heat distribution and prevents ground loop interference.

[0057] Specifically, in this embodiment, the high-voltage terminal 6 is made of ceramic-based composite insulating material. Its internal multi-layered shielding rings are arranged such that the innermost ring connects to the high-voltage output terminal, and the outermost ring is grounded. The spacing between each layer is arranged according to the 1 / 4 wavelength impedance matching principle. By arranging the multi-layered shielding rings within the ceramic terminal according to the 1 / 4 wavelength principle, with the inner ring connected to high voltage and the outer ring grounded, high-frequency radiation is suppressed through impedance matching, and gradient shielding enhances withstand voltage performance.

[0058] Specifically, in this embodiment, both the first control unit 31 and the second control unit 32 integrate a state detection circuit, which includes:

[0059] Hall current sensor connected in series in the high voltage output circuit

[0060] A temperature-compensated voltage divider resistor network connected in parallel between the high-voltage output terminal and ground.

[0061] And a fault indicator LED array connected to the PWM pin of the control unit at the drive end.

[0062] By connecting a Hall sensor in series in a high-voltage circuit and a temperature-compensated voltage divider network in parallel at the output, and using a PWM-driven fault LED array, the system can monitor current / voltage parameters in real time, improve measurement accuracy through temperature compensation, and also has a visual fault alarm function.

[0063] Specifically, in this embodiment, the conductive shielding coating on the inner wall of the metal shielding housing 1 is connected to the housing via a multi-point grounding wire. This coating is composed of silver-copper alloy particles and epoxy resin, with a thickness of 0.2-0.3 mm. By coating the inner wall of the housing with a silver-copper alloy epoxy resin coating (0.2-0.3 mm) and grounding at multiple points, the risk of static electricity accumulation is eliminated through the absorption of high-frequency electromagnetic interference.

[0064] Specifically, in this embodiment, a PTC thermistor overvoltage protector is embedded in the Z-shaped airflow channel between the first chamber 11 and the second chamber 12. This protector is connected in series with the power input lines of the two high-voltage generating units. Embedding the PTC protector in the Z-shaped airflow channel between the two chambers and connecting it in series with the power input lines allows for accelerated PTC response using airflow within the airflow channel, integrating an over-temperature / over-current dual protection mechanism for safety and reliability.

[0065] Specifically, in this embodiment, the optocoupler array of the time-division control circuit includes two pairs of anti-parallel PC817 optocouplers, wherein:

[0066] The input terminals of the first optocoupler group (U1, U2) are connected to the first control unit GPIO1, and the output terminals are connected to the interrupt pin of the second control unit.

[0067] The input terminals of the second optocoupler group (U3, U4) are connected to the second control unit GPIO2, and the output terminals are connected to the interrupt pin of the first control unit.

[0068] The common node of all optocoupler outputs is connected to the enable terminal (EN) of the frequency divider timer.

[0069] By using two pairs of anti-parallel optocouplers (PC817) to simultaneously cross-connect the interrupt pin of the control unit, and controlling the enable terminal of the frequency divider timer through the common node, bidirectional signal isolation and interlocking are achieved, and hardware-level forced time-division operation can be implemented, which simplifies the timing control logic.

[0070] Specifically, in this embodiment, both the first high-voltage generating unit 21 and the first high-voltage generating unit 22 include:

[0071] EMI filter mounted on a metal substrate;

[0072] The LLC resonant converter uses segmented PCB winding for its planar transformer secondary winding, with polyimide insulating film placed between layers.

[0073] In the voltage doubler rectifier circuit, the diode strings and capacitor banks are arranged alternately in a fishbone pattern, with a component spacing of ≥8mm;

[0074] Specifically, in this embodiment, both the first isolation communication module 41 and the second isolation communication module 42 include:

[0075] The magnetically isolated transformer has a 2mm air isolation slot between its primary and secondary frame, and the slot is filled with boron nitride.

[0076] Parallel capacitor isolation channels, with laser-etched isolation trenches between the two plates of the ceramic capacitors;

[0077] The signal conditioning circuit is encapsulated in a metal cavity and contains a differential amplifier and a Schmitt trigger.

[0078] In summary, the working principle of the dual-channel high-voltage power supply independent control module provided in this embodiment is as follows:

[0079] The dual-channel high-voltage power supply independent control module is based on a metal shielded housing 1, and its internal structure is physically isolated through a first chamber 11 and a second chamber 12. The external power supply, after passing through a PTC thermistor overvoltage protector 15, supplies power to the first high-voltage generating unit 21 and the second high-voltage generating unit 22. The high-voltage DC power generated by the two units is output through the high-voltage terminal block 6.

[0080] The first control unit 31 and the second control unit 32 operate in their respective chambers. Their communication terminals are connected to the main control system via a magnetic isolation transformer. The ADC sampling terminal receives feedback signals from the corresponding high-voltage generating unit and monitors the output status in real time. The time-sharing control circuit plays a crucial role. An optocoupler array (containing two pairs of anti-parallel PC817 optocouplers) cross-connects the GPIO ports and interrupt pins of the two control units. When one control unit is working, the other control unit enters an interrupt state through optocoupler signal transmission, achieving interlocking. The frequency divider timer sends interrupt signals to the two control units through the CLKOUT pin according to the set timing sequence, controlling the working time and ensuring time-sharing adjustment of the dual-channel high-voltage output.

[0081] The heat dissipation fin array 7 is arranged in a wave-like staggered pattern, working in conjunction with the ventilation grille 8 to optimize airflow and accelerate air circulation. The thermally conductive graphite sheet 71 quickly conducts heat to the metal shielding shell 1, achieving efficient heat dissipation. The conductive shielding coating on the inner wall of the metal shielding shell 1, and the multi-layer shielding rings arranged according to the 1 / 4 wavelength impedance matching principle inside the high-voltage terminal 6, work together to suppress electromagnetic interference and high-frequency radiation. The Hall current sensor and temperature-compensated voltage divider resistor network in the status detection circuit monitor the current and voltage parameters of the high-voltage output circuit in real time. The fault indication LED array is driven by PWM to realize visual fault alarm.

[0082] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual high-voltage power supply independent control module, characterized in that, include: The metal shielding shell (1) has a first chamber (11) and a second chamber (12) that are isolated from each other. The first high-voltage generating unit (21), the first control unit (31) and the first isolation communication module (41) are installed in the first chamber (11). The second high-voltage generating unit (22), the second control unit (32) and the second isolation communication module (42) are installed in the second chamber (12). The first control unit (31) and the second control unit (32) are connected by a time-division control circuit, which includes an optocoupler array and a frequency divider timer; The metal shielding housing (1) is provided with a detachable high-voltage terminal (6) at the top, a heat dissipation fin array (7) at the bottom, and ventilation grilles (8) on both sides. in: The input terminal of the first high voltage generating unit (21) is connected to an external power supply through a PTC thermistor overvoltage protector (15), and the output terminal is connected to the first channel of the high voltage terminal (6). The communication terminal of the first control unit (31) is connected to the main control system through a magnetic isolation transformer, and its ADC sampling terminal is connected to the feedback terminal of the first high voltage generating unit (21). The optocoupler array of the time-division control circuit is bidirectionally connected to the GPIO ports of the two control units, and the CLKOUT pin of the frequency divider timer is connected to the interrupt pin of the two control units.

2. The dual high voltage power supply independent control module of claim 1, wherein: The magnetic isolation transformers of the first isolation communication module (41) and the second isolation communication module (42) are provided with an air gap isolation strip of more than 0.5 mm between the primary and secondary sides.

3. The dual high voltage power supply independent control module of claim 1, wherein: The time-sharing control circuit includes a digital potentiometer array, whose chip select signal terminal is connected to a mechanical interlock mechanism. This interlock mechanism includes a linked double-pole double-throw switch to ensure that the two high-voltage outputs are not in the adjustment state at the same time.

4. The dual high voltage power supply independent control module of claim 1, wherein: The heat dissipation fin array (7) is arranged in a wave-like staggered pattern, with a spacing of 2-3 mm between adjacent fins. A thermally conductive graphite sheet (71) is embedded at the bottom. The thermally conductive graphite sheet (71) is welded to the metal shielding shell (1) and electrically isolated from the high-voltage ground plane.

5. The dual high voltage power supply independent control module of claim 1, wherein: The high-voltage terminal (6) is made of ceramic-based composite insulating material. The multi-layer shielding ring embedded inside it is connected to the high-voltage output terminal, and the outermost ring is grounded. The spacing between each layer is arranged according to the 1 / 4 wavelength impedance matching principle.

6. The dual high voltage power supply independent control module of claim 1, wherein: Both the first control unit (31) and the second control unit (32) integrate a state detection circuit, which includes: Hall current sensor connected in series in the high voltage output circuit A temperature-compensated voltage divider resistor network connected in parallel between the high-voltage output terminal and ground. And a fault indicator LED array connected to the PWM pin of the control unit at the drive end.

7. The dual high voltage power supply independent control module of claim 1, wherein: The conductive shielding coating on the inner wall of the metal shielding shell (1) is connected to the shell through a multi-point grounding wire, and the coating thickness is 0.2-0.3mm.

8. The dual high voltage power supply independent control module of claim 1, wherein: A PTC thermistor overvoltage protector is embedded in the Z-shaped flow channel between the first chamber (11) and the second chamber (12), and the protector is connected in series on the power input line of the two high-voltage generating units.

9. The dual high voltage power supply independent control module of any of claims 1-8, wherein: The optocoupler array of the time-division control circuit includes two pairs of anti-parallel PC817 optocouplers, wherein: The input terminals of the first optocoupler group (U1, U2) are connected to the first control unit GPIO1, and the output terminals are connected to the interrupt pin of the second control unit. The input terminals of the second optocoupler group (U3, U4) are connected to the second control unit GPIO2, and the output terminals are connected to the interrupt pin of the first control unit. The common node of all optocoupler outputs is connected to the enable terminal (EN) of the frequency divider timer.

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