Shenzhen KTV power adapter thermal design principles, procedures and related parameters Power adapters have been widely used in various current electronic equipment, the following Shenzhen KTV power adapter manufacturer - Dajing Power Xiaobian will tell you about the heat dissipation design of KTV power adapters gist;

A large number of high-power semiconductor devices are used in Shenzhen KTV power adapters, such as rectifier bridge stacks, high-current rectifiers, high-power triodes or field effect transistors, etc. They will generate a lot of heat when they work. Exhausting and keeping it at a reasonable level will affect the normal operation of the power adapter, and even damage the power adapter in severe cases. In order to improve the reliability of the power adapter, thermal design is an essential and important part of the power adapter design. link. Shenzhen KTV power adapter radiator design points 1. When the pipe is insulated from the casing, the radiator should be insulated from the casing, not only with electrical insulating sheets. 2. In the case of sealing, pay attention to no convection. 3. Air duct design during air cooling. 4. On the premise of ensuring the heat dissipation requirements, try to choose a radiator with small size and light weight. 5. When installing, try to increase the contact area and pressure between the device and the heat sink, and coat the contact surface with silicone grease. Pay attention to the way and direction of installation. 6. The surface of the heat sink should be rough, but the contact surface with the device should have a good finish and be painted black. Shenzhen KTV power adapter reduces the heat generated by the power switch by optimizing the design and other methods. At the same time, it also needs to use the heat transfer principles of conduction, convection and radiation through the radiator to quickly release the heat generated by the components to the surrounding environment to reduce the internal Heat accumulation reduces the operating temperature of components, which is thermal design. The basic principles of thermal design are as follows. (1) It is necessary to clearly understand the working environment of the power adapter, including the variation range of ambient temperature, the radiation of the sun or other surrounding objects, etc. The heat dissipation scheme of the power adapter should meet the requirements of the application environment. (2) Class II derating is used for components, and the maximum allowable temperature can be determined according to the data of the components. (3) The thermal design of the power adapter should be considered at the same time as the industrial modeling design, electrical design, structural design, reliability design and electromagnetic compatibility design. On the premise of ensuring electrical performance and reliability requirements, trade-off analysis and compromise solutions. For example, when designing ventilation mesh panels, it is generally desirable to have a high opening rate, which involves hole spacing and hole size. From the size of the hole, of course, it is hoped that the bigger the better, but on the one hand, considering the requirements of electromagnetic compatibility, the diameter of the opening generally does not exceed 1/20 of the interference wavelength; on the other hand, according to the requirements of safety regulations, the opening of the system Any of the following requirements must be met. ①Measured in any direction, the size of the hole should not exceed 5mm. ②If the width of the hole is within 1mm, the length is not limited. ③The size of the hole is not limited, but it must be ensured that foreign objects will not fall directly into the hole and touch the parts with dangerous voltage. (4) The vibration and noise of cooling equipment should be considered. (5) If forced air cooling is used, the inlet temperature of the cooling air should be limited. Even if the inlet of the cooling air is far away from the outlet of the hot air of other equipment, the cooling air cannot be used for secondary cooling. (6) It is necessary to ensure that the cooling system has a simple structure, reliable operation and low cost. An important principle is to strive to use mature technology and mature technology to design high-reliability products. (7) To improve the maintainability of the cooling system. When repairing the cooling system, it should have good safety and accessibility. The dustproof device and fan should be easy to disassemble, clean and replace quickly, and the dustproof device must have a sign reminding the user to clean. (8) The thermal design of the power device in the power adapter should be considered together with the thermal design of the power adapter. For example, the thermal design of the power adapter rectifier should take into account the thermal design of the power adapter, and the thermal design of the transmission subrack should take into account the thermal design of the entire cabinet, and vice versa. Shenzhen KTV power adapters should generally use natural cooling as much as possible instead of air cooling. During component layout, heating components should be placed in the downwind position or on the upper part of the PCB. The radiator is treated with an oxidation blackening process to improve the emissivity, and it is not allowed to be coated with black paint. After the radiator is sprayed with conformal paint, it will affect the heat dissipation effect, and it is necessary to increase the allowance appropriately. The plane of the radiator installation should be smooth and flat. Generally, the contact surface is coated with silicone grease to improve the thermal conductivity. The transformer and the inductor coil should be thicker. wire to suppress temperature rise. The above is the research and development of Shenzhen KTV power adapter - Dajing Power Xiaobian shared the key points of the heat dissipation design of KTV power adapters. Shenzhen Dajing Power Technology Co., Ltd. is a technology enterprise integrating independent research and development and production, specializing in the production of high-quality ktv power adapters and all-in-one machines. Power adapters, etc., with technology as the core and service as the foundation, have strong R&D strength and efficient production capacity, and insist on winning trust with quality for a long time.