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The latest research results of the Nuclear Energy Association show that the safety of inland nuclear power is guaranteed.

The latest research results of the Nuclear Energy Association show that the safety of inland nuclear power is guaranteed.

The electronic components of the car should be reliable and durable, and need no maintenance during the life of the car. However, for electric vehicles and hybrid vehicles, electronic components must be subjected to high pressure and high temperature environment, it is necessary to have liquid cooling. Obviously, cooling technology requires careful technical research and development, and materials need to pass the assessment of reliable durability and applicability to ensure stable operation. Even with high technical requirements, OEM customers continue to pursue high-volume, low-cost, high-quality products.

2020/09/18

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What is the reason why IGBT has become the core of new energy vehicles?

For new energy vehicles, the battery, VCU, BSM, and motor efficiency all lack room for improvement. The most room for improvement is the motor drive part, and the core component of the motor drive part is IGBT(Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor chip) is the most important. IGBT accounts for about half of the cost of the motor drive system, while the motor drive system accounts for 15-20% of the cost of the whole vehicle, that is to say, IGBT accounts for 7-10% of the cost of the whole vehicle, which is the second highest cost component except the battery, and also determines the energy efficiency of the whole vehicle. Not only the motor drive to use IGBT, new energy generators and air conditioning parts generally also need IGBT. Not only new energy vehicles, but also the core of DC charging piles and locomotives (high-speed rail) are IGBT tubes. 30% of the raw material cost of DC charging piles is IGBT. Electric locomotives generally need 500 IGBT modules, EMUs need more than 100 IGBT modules, and a subway needs 50-80 IGBT modules. Mitsubishi Electric's HVIGBT has become the default standard in the industry. China's high-speed locomotive IGBT is completely monopolized by Mitsubishi. At the same time, Alstom, Siemens and Bombardier in Europe also use more than half of Mitsubishi Electric's IGBT. In addition to Japanese manufacturers, Infineon has taken over the IGBT of almost all electric vehicles, while mitsubishi electric is intoxicated by the huge profits of China's high-speed rail and has achieved almost nothing in the market below 2500V. In 2016, the global sales volume of electric vehicles was about 2 million, which consumed about 0.9 billion US dollars of IGBT tubes, with an average of about 450 US dollars per vehicle. It is the most expensive component in electric vehicles except batteries. Among them, there are about 770000 hybrid and PHEV vehicles, each requiring about $300 IGBT, about 1.23 million pure electric vehicles, with an average of $540 IGBT per vehicle, and IGBTs for high-power pure electric buses may exceed $1000. What is IGBT? IGBT is a composite full-control voltage-driven power semiconductor device composed of BJT (bipolar transistor) and MOS (insulated gate field effect transistor). Compared with the previous various power electronic devices, IGBT has the following characteristics: high input impedance, can use general low-cost drive circuit; high-speed switching characteristics; on-state low loss. IGBT combines the advantages of MOSFET's high input impedance and GTR's low conduction voltage drop, and has obvious advantages in comprehensive performance. It is very suitable for application in DC voltage of 600V and above converter systems such as AC motors, frequency converters, switching power supplies, lighting circuits, traction drives and other fields.

2020/09/18

The design of the heat dissipation substrate is usually arranged in a sheet-like or sheet-like manner.

The sheet-shaped heat dissipation substrate is designed to have a surface of the heat sink in a shape of one piece, similar to a sheet, so that the heat dissipation surface area can be increased and the heat dissipation effect can be improved. The sheet-shaped heat-dissipating substrate may adopt various shapes and structures, such as a straight shape, a wave shape, etc., to increase heat conduction and heat transfer efficiency.

2023/08/28

The heat dissipation substrate is a key heat dissipation component.

The design of the heat dissipation substrate usually adopts a sheet-like or sheet-like arrangement, and the surface usually has fins or uneven structures to increase the surface area. The structure design is directly related to the heat dissipation effect. Generally speaking, the more fins, the larger the surface area, and the better the heat dissipation effect. At the same time, the spacing between the fins also needs to be reasonably designed. If it is too small, it will affect the air flow, and if it is too large, it will affect the heat dissipation effect.

2023/08/28

Heat dissipation components are devices used to improve the heat dissipation performance of electronic equipment.

Heat dissipation components play a vital role in electronic equipment. They can effectively reduce the temperature of the equipment and improve the reliability and life of the equipment. With the continuous development and innovation of electronic products, heat dissipation technology is also constantly improving. In the future, heat dissipation components will be more * * *, miniaturized and intelligent, providing a better solution for the heat dissipation problem of electronic equipment.

2023/08/28