Merging unit high-power laser heat dissipation system and control method

Abstract

According to the merging unit high-power laser heat dissipation system and the control method, a laser plate controls driving current, and the wind speed can be adjusted according to the heating value of a laser instead of being adjusted according to low correlation parameters such as the environment temperature. Fan driving current is measured, fan faults can be judged at the first time, operation and maintenance personnel can be prompted to replace the fan in time, windless or less fault time of the laser is shortened, and stable and reliable operation of the collector is guaranteed. According to the system structure, the fan and the laser plate are mounted in the same case, and a stable and reliable air duct is provided and cannot be damaged due to engineering factors. A high-power laser can generate a large amount of heat during working, if heat is not dissipated in time, the conversion efficiency of the laser can be reduced, the service life of the laser can be shortened, and even the laser can be damaged possibly. The working temperature of the laser can be effectively reduced through heat dissipation of the fan, so that the laser can operate in a proper temperature range, and stable performance and long-term reliable use of the laser are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power systems and relates to a merging unit high-power laser heat dissipation system and a control method. Background Art

[0002] Laser-powered electronic transformers are widely used in DC and AC current and voltage measurement systems of power systems. The advantages include no electrical connection between the high-voltage side collector and the low-voltage side merging unit. Compared with traditional transformers, the collection frequency is high and the accuracy is high, and higher frequency harmonics in the line can be measured. With the development of the power industry, the power system has gradually increased the requirements for parameters such as sampling rate, measurement accuracy, number of measurement channels, and signal transmission speed of electronic transformers. The original Rogowski coil combined with a low-power collector cannot meet the needs of the industry. The present invention is applied to quantum transformer equipment. Since the power consumption of the quantum transformer collector is greater than 10W, multiple photocells are required to be output in parallel. The conversion efficiency of the photocell is less than 50%, and the conversion efficiency will be reduced due to the increase in the temperature of the photocell shell. The laser generates losses during transmission in the optical fiber, and the laser's electrical-to-optical efficiency is less than 50%. It is also affected by the operating temperature, which affects its conversion efficiency. Therefore, most of the input electrical power will be dissipated in the form of heat. The laser operating temperature affects its working life. Long-term high-temperature operation will greatly reduce the service life, and even thermal failure will cause the output power to drop sharply. Therefore, effectively controlling the temperature rise of the laser is an important measure to ensure the normal operation of the laser and extend its working life. The merging unit is installed in the indoor control cabinet, with an operating temperature of 0-50℃. The temperature control system controls the temperature rise of the laser within 20℃.

[0003] The existing laser energy supply system has a small power consumption of the collector, generally less than 500mW, a small output power of the laser, generally less than 1W, and a small heat generation of the laser. The existing solution uses an independent 1U fan chassis with no remote control and telemetry connection to the merging unit. The fan is in an independent chassis, which is close to the merging unit during the project, and the wind flows through the heat dissipation holes on the upper and lower covers of the chassis. There are two main ways to control the wind speed of the fan chassis. The first is to adjust it based on the ambient temperature measured by its own sensor. The second is to not adjust the wind speed and work at maximum power without adjusting according to the laser power or ambient temperature. The existing collector has a small power and is only powered by one photocell, that is, one laser generates laser power to power one collector.

[0004] The fan uses an independent chassis. In actual projects, due to restrictions on cabinet standards or electrical installation specifications, the fan chassis cannot fit tightly against the merging unit chassis. A gap is formed between the fan chassis and the merging unit chassis, and a closed air duct cannot be formed, which greatly reduces the air volume flowing through the merging unit laser radiator and cannot provide sufficient air volume for the laser as required by the design. The existing fan is encapsulated in the chassis of the whole machine. Due to the high failure rate of the fan, it is inconvenient to replace it. It is necessary to disconnect the power supply of the control cabinet or the dedicated circuit breaker of the fan chassis and replace the fan chassis in the cabinet. The steps are cumbersome and time-consuming. If the merging unit continues to work without power outage during the replacement of the fan, the laser will not receive cooling air for a long time, and the laser will malfunction due to overheating, resulting in reduced laser power output and insufficient power supply to the collector.

[0005] There is no telemetry or remote control signal connection between the merging unit and the fan, and there is no remote control of the wind speed. The fan speed cannot be adjusted based on the heat generated by the laser drive current and ambient temperature. It can only be adjusted based on the ambient temperature. The fan speed cannot be adjusted based on the heat generated by the heat source to keep the laser working at the specified temperature rise. There is no remote measurement to measure the fan drive current to determine whether the fan is working properly. The laser board cannot know the working status of the fan, and cannot determine whether the temperature rise of the laser is caused by no wind or little wind due to a fan failure. The existing merging unit measures the ambient temperature through an internal temperature sensor. Due to the large number of heat sources inside the merging unit, the measured temperature is not the actual ambient temperature in the control cabinet.

[0006] In the existing laser power supply system, a laser supplies power to the collector. If the laser fails, the optical power is reduced or disappears, and the high-voltage side collector cannot work normally. As an important equipment in the power system, the electronic transformer will cause power system failure if the measurement data fails. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that the fan in the laser heat dissipation system in the prior art cannot dissipate heat efficiently, and to provide a merging unit high-power laser heat dissipation system and a control method.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides a merging unit high-power laser heat dissipation system, comprising a collector and a merging unit installed in a chassis; the merging unit comprises a fan and a communication board, a main control board, a power board, a laser board and a laser power supply installed on a circuit board;

[0010] The collector is connected to the communication board to realize data transmission and interaction; the laser power supply is connected to the first port of the laser board, the communication board and the power board are both connected to the main control board, the main control board is connected to the fan, and the second port of the laser board is connected to the main control board.

[0011] Preferably, a drawer structure is provided on the chassis, and the fan is arranged in the drawer structure.

[0012] Preferably, the baffle of the drawer structure is aligned with the circuit board.

[0013] Preferably, a thermostat is connected to the main control board.

[0014] Preferably, a temperature sensor is connected to the main control board.

[0015] Preferably, the merging unit adopts a 5U chassis.

[0016] The present invention provides a control method for a merging unit high-power laser heat dissipation system, comprising:

[0017] Obtain the fan drive current, the actual fan drive current, the current operating power of the laser and the initial power of the laser;

[0018] The fan current difference is obtained based on the fan driving current and the actual fan driving current, and the laser power difference is obtained based on the current working power of the laser and the initial power of the laser;

[0019] Based on the laser power difference and the fan current difference, obtaining the laser drive current change amplitude and the fan drive current change amplitude;

[0020] If the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and collector power consumption are obtained to realize the control of the laser cooling system.

[0021] Preferably, the fan driving current I 风 =a*T 环 +b*P 激光 +c, where T 环 is the ambient temperature, P 激光 is the laser startup output power, a, b, c are coefficients that affect the fan drive current.

[0022] Preferably, the laser drive current variation range and the fan drive current variation range are obtained based on the laser power difference and the fan current difference, specifically:

[0023] If the laser power difference and fan current difference are both greater than the set threshold, the fan and laser faults will alarm;

[0024] If the laser power difference and the fan current difference are both less than or equal to the set threshold, the laser energy supply system works stably to obtain the laser drive current and the fan drive current.

[0025] Preferably, if the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and the collector power consumption are obtained, specifically:

[0026] The laser drive current changes by more than 10%, or the fan drive current changes by more than the measured or calculated value of the fan drive current, indicating a laser or fan operation failure.

[0027] If the temperature rise of the laser exceeds 5℃ of 20℃, increase the fan drive current and fan speed, measure the fan drive current and calculate the increase of fan output power. If the fan output power does not increase to the expected value, inform the operation and maintenance personnel of the fan adjustment failure; if the fan output power has been adjusted to the expected value, inform the operation and maintenance personnel that the fan power is at the maximum, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current;

[0028] If the collector photocell output power change exceeds the set value, adjust the output power of each laser according to the collector photocell output power change until the collector power consumption is met, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention proposes a combined unit high-power laser heat dissipation system, in which the laser board controls the driving current and can adjust the wind speed according to the heat generated by the laser, instead of adjusting the wind speed according to low-correlation parameters such as ambient temperature. By measuring the fan driving current, the fan failure can be judged in the first time, and an alarm can be issued in time to prompt the operation and maintenance personnel to replace the fan, thereby reducing the laser windless or low wind failure time and ensuring the stable and reliable operation of the collector. In terms of the structure of this system, the fan and the laser board are installed in a chassis, which has a stable and reliable air duct and will not be damaged by engineering factors. High-power lasers generate a lot of heat when working. If the heat is not dissipated in time, the excessive temperature will reduce the conversion efficiency of the laser, shorten its service life, and may even cause damage to the laser. Through the fan heat dissipation, the operating temperature of the laser can be effectively reduced so that it can operate within a suitable temperature range, thereby ensuring the stable performance of the laser and long-term reliable use.

[0031] Furthermore, a retractable drawer structure is installed, a fan is installed in the drawer structure, and baffles are designed on both sides of the drawer to align with the upper circuit board to form a stable and reliable air duct. The fan has a power switch. If a fan failure is found, the merging unit can be quickly replaced without power outage, which greatly reduces the laser's windless or low wind failure time and ensures stable and reliable operation of the collector.

[0032] Furthermore, multiple temperature sensors are installed at different positions in the chassis, and the real ambient temperature of the control cabinet is obtained through comprehensive calculation, and the obtained ambient temperature is an accurate temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 This is the rear panel layout of the merging unit of the present invention.

[0035] Figure 2 This is a diagram of the temperature control system of the high-power laser energy supply system of the present invention.

[0036] Figure 3 This is a flow chart of the calculation of laser heating and fan speed adjustment of the present invention.

[0037] Figure 4 This is a flow chart of the high-power laser heat dissipation system control method of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0045] like Figure 1 and Figure 2 As shown, the present invention proposes a merging unit high-power laser cooling system, including a merging unit and a collector, and the merging unit chassis layout is shown in Figure 1The merging unit is mainly divided into two parts, a 4U circuit board and a 1U fan. A merging unit is installed with two laser boards to power one collector. Since the laser power drive current is large, each laser board is equipped with a power supply specifically for the laser to improve the power supply reliability. The conventional merging unit 4U chassis is separated from the fan 1U chassis, and there is no electrical and structural connection. In the present invention, since the laser board needs to control and measure the fan drive current, and in order to ensure a stable air volume, the air duct needs to be fixed, so the merging unit uses a 5U chassis, and the upper 4U part uses a conventional merging unit chassis structure, a conventional power board, and a main control board. The lower 1U part is installed with a fan and a fan switch. The upper 4U part has a laser board and a power board to form a more reliable air duct. The lower 1U part is installed with a pull-out drawer structure, and each drawer is installed with several square fans. The baffles on both sides of the drawer are designed to align with the upper circuit board to form a stable and reliable air duct. The power supply and remote control interface of the fan are composed of pluggable male and female socket plugs. Each fan drawer is fixed by a track and can be quickly plugged in and out. Since the electronic transformer cannot be easily powered off, once a laser fan failure is found, the fan switch on the rear panel can be turned off, the faulty fan drawer can be quickly pulled out and replaced with a new one. The fan drawer can be quickly replaced without powering off the merging unit, ensuring that the laser has a short windless time and has little impact on its working performance and life.

[0046] With the development and application of high-power devices such as quantum collection chips, the power consumption of the collector is greater than 10W, that is, multiple photocells are connected in parallel to output 10W of electrical power. Since the conversion efficiency of photocells is less than 50%, the conversion efficiency is affected by the operating temperature. The conversion efficiency of lasers is less than 50%, and the conversion efficiency is affected by their operating temperature. The electronic mutual inductor laser power supply system consists of a merging unit and a collector. The laser board provides optical power to the collector photocell, and the collector photocell outputs optical power to provide power for the measurement and communication system. The merging unit main control board receives the temperature and humidity data of the thermostat and provides accurate ambient temperature data for the laser cooling system. The laser board control unit generates driving current to power the laser through the driving current, which is converted into laser power. The laser is fixed to the radiator through thermal grease and screws. The control unit measures the laser operating temperature and driving current through the current sensor of the temperature and driving circuit fixed on the radiator. Use multiple high-power lasers to output optical power for the collector photocell, and the collector uses multiple high-power photocells. Multiple lasers normally output at the same power, and multiple photocells are output in parallel. If the output of a laser failure is less than the rated power or is zero, the power output of the remaining lasers will increase until the output power of all photocells meets the normal operation of the collector, and an alarm will be triggered to remind the operation and maintenance personnel of the laser failure.

[0047] The collector's multi-channel photocell receives the combined unit laser power, measures the photocell output current and voltage, and the photocell operating temperature, and transmits them to the laser board through the optical fiber communication interface. The laser board calculates the collector power consumption based on the above data, adjusts the laser output, calculates the heat value based on the laser output and temperature, and adjusts the fan drive current and fan speed. The redundant configuration of multiple photocells and multiple lasers on the laser board ensures the reliable operation of the electronic mutual inductor.

[0048] The laser fan speed adjustment is based on the calculation process of laser heat generation and fan speed. Figure 3 .

[0049] Step 1: Limit the laser working environment temperature to 0-50°C, and the laser temperature rise is less than 20°C.

[0050] Step 2: Calculate the heat generated by the laser at different output power points based on the power consumption and conversion efficiency of the laser at each power output point.

[0051] Step 3: Based on the limited conditions, the unit chassis air duct structure, fan air volume, air pressure, heat sink cooling area and other parameters are combined to perform thermal simulation, and the fan wind speed of the laser at various power points and different ambient temperatures to meet the temperature rise requirements is calculated.

[0052] Step 4: Use the laser operating temperature as a correction parameter to correct the laser conversion efficiency, calculate the laser heat again, and increase the fan speed as the excess heat is generated.

[0053] Step 5: Simulate and calculate the fan speed, reserve a margin as the fan adjustment parameter, simulate the ambient temperature through a high and low temperature box, and test the power points at different ambient temperatures according to the calculated wind speed to determine the fan speed at each laser power point. Finally, determine the fan drive current I 风 、Ambient temperature T 环、 Laser output power P 激光 The functional relationship of I 风 =a*T 环 +b*P 激光 +c, functions a, b, c are coefficients.

[0054] A high-power laser heat dissipation system control method comprises the following steps:

[0055] S1. Obtain the fan driving current, the actual fan driving current, the current working power of the laser and the initial power of the laser;

[0056] The fan drive current I 风 =a*T 环 +b*P 激光 +c, where T 环 is the ambient temperature, P 激光is the laser startup output power, a, b, c are coefficients that affect the fan drive current.

[0057] S2. Obtaining a fan current difference based on the fan drive current and the actual fan drive current, and obtaining a laser power difference based on the current working power of the laser and the initial power of the laser;

[0058] S3. Based on the laser power difference and the fan current difference, obtain the laser drive current change amplitude and the fan drive current change amplitude;

[0059] The laser drive current variation range and the fan drive current variation range are obtained based on the laser power difference and the fan current difference, specifically:

[0060] If the laser power difference and fan current difference are both greater than the set threshold, the fan and laser faults will alarm;

[0061] If the laser power difference and the fan current difference are both less than or equal to the set threshold, the laser energy supply system works stably to obtain the laser drive current and the fan drive current.

[0062] S4. If the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and the collector power consumption are obtained to realize the control of the laser cooling system.

[0063] If the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and the collector power consumption are obtained, specifically:

[0064] The laser drive current changes by more than 10%, or the fan drive current changes by more than the measured or calculated value of the fan drive current, indicating a laser or fan operation failure.

[0065] If the temperature rise of the laser exceeds 5℃ of 20℃, increase the fan drive current and fan speed, measure the fan drive current and calculate the increase of fan output power. If the fan output power does not increase to the expected value, inform the operation and maintenance personnel of the fan adjustment failure; if the fan output power has been adjusted to the expected value, inform the operation and maintenance personnel that the fan power is at the maximum, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current;

[0066] If the collector photocell output power change exceeds the set value, adjust the output power of each laser according to the collector photocell output power change until the collector power consumption is met, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current.

[0067] Combine the following Figure 4The method is described in detail:

[0068] Step 1: After the merging unit is started, collect the temperature controller data of the control cabinet to obtain the laser ambient temperature, receive the start command and prepare to start the laser and fan.

[0069] Step 2: According to the laser startup output power and ambient temperature, 风 =a*T 环 +b*P 激光 +c function, calculate the fan drive current. Start the fan and measure the actual fan drive current I 风测 , calculate the set drive current I 风 With the measured current I 风测 Difference Δ 风 , Δ 风 =|I 风 -I 风测 |, if Δ 风 >d. The fan will alarm if it is working abnormally. After the operation and maintenance personnel have eliminated the fault, they will issue a reset command to eliminate the fault and restart.

[0070] Step 3: Calculate the current laser operating power P based on the measured laser drive current 测 , calculate P 测 With the set laser initial power P 激光 The difference Δ 激光 , Δ 激光 =|P 测 -P 激光 |, if Δ 激光 >d, the laser fault alarm is issued. After the operation and maintenance personnel have eliminated the fault, they will issue a reset command to eliminate the fault and restart.

[0071] Step 4: After the laser energy supply system is working stably, monitor the laser drive current and fan drive current. If the change exceeds e% or f%, an alarm will be issued to the operation and maintenance personnel to inform them of laser or fan operation failure.

[0072] Among them, e% is an empirical value, generally set to 10%, and f is a measured value and a calculated value, that is, when a fan fails, through calculation and actual measurement verification, at a certain fan power point, when a fan fails, the change in fan drive current is used as the threshold.

[0073] Step 5, measure the laser operating temperature. If the laser temperature rise exceeds the specified requirement of 20°C by g℃, g is an empirical value, generally set to 5℃; increase the fan drive current by h% to increase the fan speed. If it does not exceed, return to step 4. Measure the fan drive current to calculate whether the fan output power increases according to the setting. If the fan does not increase the power as required, prompt the operation and maintenance personnel that the fan adjustment is faulty. If the fan power has been adjusted to the maximum value and cannot continue to increase, prompt the operation and maintenance personnel that the fan power is already at the maximum. Wait for i seconds to measure the fan current, laser temperature, and laser drive current, and return to step 4.

[0074] Step 6. Receive the collector photocell output current, voltage and temperature data to calculate the collector power consumption and determine whether the photocell output power changes by more than j%. j is an empirical value, generally set to 5%. If the collector power consumption changes, adjust the output power of each laser according to the output power change of each photocell. If a single laser fails, adjust the output power of another laser until the collector power consumption is met. Adjust the laser output power and the fan speed. If the collector power consumption does not exceed the threshold, continue to return to step 4. Measure the laser drive power and fan speed to determine whether they are adjusted as required. If an error is found, inform the operation and maintenance personnel of the fan or laser power failure. After adjustment, measure the fan current, laser temperature, and laser drive current, and return to step 4.

[0075] Step 5 and step 6 are executed in parallel without any order. If the logical conditions are met, the execution can be triggered.

[0076] The system proposed by the present invention has the following advantages:

[0077] 1) In this system structure, the fan and the laser board are installed in a chassis, which has a stable and reliable air duct and will not be damaged due to engineering factors. Each laser board has an independent fan drawer, with several square fans embedded in it, and a pluggable power signal interface. Each fan has a power switch. If a fan failure is found, the unit can be merged and replaced quickly without power outage, which greatly reduces the failure time of the laser without wind or insufficient wind, and ensures the stable and reliable operation of the collector.

[0078] 2) The laser board controls the drive current and can adjust the wind speed according to the heat generated by the laser, rather than according to less relevant parameters such as ambient temperature. By measuring the fan drive current, fan failure can be immediately identified, and an alarm can be issued in time to prompt the operation and maintenance personnel to replace the fan, thus reducing the laser's windless or low wind failure time and ensuring stable and reliable operation of the collector.

[0079] 3) Use the actual value measured by the thermostat as the ambient temperature to obtain accurate data.

[0080] 4) Measure the operating temperature, output current and voltage of the photocell, and comprehensively calculate the power consumption of the photocell. Measure the laser drive current and operating temperature, comprehensively calculate the heat generated by the laser, and obtain accurate data.

[0081] 5) Redundant configuration of laser, power board and photocell ensures stable and reliable operation of the system.

[0082] In this system structure, the fan and the laser board are installed in a chassis, which has a stable and reliable air duct and will not be damaged due to engineering factors. Each laser board has an independent fan drawer, with several square fans embedded in it, and a pluggable power signal interface. Each fan group has a power switch. If a fan failure is found, the unit can be merged and replaced quickly without power outage, which greatly reduces the laser's windless or low wind failure time and ensures stable and reliable operation of the collector. According to simulation and actual measurement, the temperature rise is guaranteed to be less than 20°C, and the functional relationship between the fan drive current, laser output power, and ambient temperature is summarized. Measure the fan and laser self-test before starting the equipment, measure the fan and laser drive current after the laser is started, measure the laser stability and collector power consumption, adjust the laser and fan power in real time, and provide a control method for timely alarm if a fault is found.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A merging unit high-power laser heat dissipation system, characterized in that: It includes a collector and a merging unit installed in a chassis; the merging unit includes a fan and a communication board, a main control board, a power board, a laser board and a laser power supply installed on a circuit board; The collector is connected to the communication board to realize data transmission and interaction; the laser power supply is connected to the first port of the laser board, the communication board and the power board are both connected to the main control board, the main control board is connected to the fan, and the second port of the laser board is connected to the main control board.

2. The merging unit high-power laser heat dissipation system according to claim 1, characterized in that: A drawer structure is arranged on the chassis, and the fan is arranged in the drawer structure.

3. The merging unit high-power laser heat dissipation system according to claim 2, characterized in that: The baffle plate of the drawer structure is aligned with the circuit board.

4. The merging unit high-power laser heat dissipation system according to claim 1, characterized in that: The main control board is connected with a temperature controller.

5. The merging unit high-power laser heat dissipation system according to claim 1, characterized in that: A temperature sensor is connected to the main control board.

6. The merging unit high-power laser heat dissipation system according to claim 1, characterized in that: The merging unit adopts a 5U chassis.

7. A control method for a merging unit high-power laser heat dissipation system, characterized in that: include: Obtain the fan drive current, the actual fan drive current, the current operating power of the laser and the initial power of the laser; The fan current difference is obtained based on the fan driving current and the actual fan driving current, and the laser power difference is obtained based on the current working power of the laser and the initial power of the laser; Based on the laser power difference and the fan current difference, obtaining the laser drive current change amplitude and the fan drive current change amplitude; If the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and collector power consumption are obtained to realize the control of the laser cooling system.

8. The control method of the merging unit high-power laser heat dissipation system according to claim 7, characterized in that: The fan drive current I 风 =a*T 环 +b*P 激光 +c, where T 环 is the ambient temperature, P 激光 is the laser startup output power, a, b, c are coefficients that affect the fan drive current.

9. The control method of the merging unit high-power laser heat dissipation system according to claim 7, characterized in that: The laser drive current variation range and the fan drive current variation range are obtained based on the laser power difference and the fan current difference, specifically: If the laser power difference and fan current difference are both greater than the set threshold, the fan and laser faults will alarm; If the laser power difference and the fan current difference are both less than or equal to the set threshold, the laser energy supply system works stably to obtain the laser drive current and the fan drive current.

10. The control method of the merging unit high-power laser heat dissipation system according to claim 7, characterized in that: If the laser drive current variation amplitude and the fan drive current variation amplitude both exceed the set value, the laser operating temperature and the collector power consumption are obtained, specifically: The laser drive current changes by more than 10%, or the fan drive current changes by more than the measured or calculated value of the fan drive current, indicating a laser or fan operation failure. If the temperature rise of the laser exceeds 5℃ of 20℃, increase the fan drive current and fan speed, measure the fan drive current and calculate the increase of fan output power. If the fan output power does not increase to the expected value, inform the operation and maintenance personnel of the fan adjustment failure; if the fan output power has been adjusted to the expected value, inform the operation and maintenance personnel that the fan power is at the maximum, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current; If the collector photocell output power change exceeds the set value, adjust the output power of each laser according to the collector photocell output power change until the collector power consumption is met, measure the laser operating temperature, fan current, and laser drive current, and obtain the collector power consumption based on the fan current and laser drive current.

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