Is there a risk that the inverter shell of the hot

2022-09-20
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Is there any risk that the inverter shell of photovoltaic power station is too hot

as a power electronic device, the main function of photovoltaic inverter is to convert the DC generated by photovoltaic modules into AC. Because there are thousands of electronic components inside, and most of them are heat source components, the heat dissipation design has a great impact on the life of the inverter. However, not all users know all this, so that we often receive questions like this and that: "the surface temperature of an inverter installed on the roof of my home is hot. Is there a problem with the inverter?" "Is the inverter about to explode?" wait. Of course, that's not the answer. Let's explain it through the analysis of mainstream cooling schemes and the third-party TUV data report

with the development of photovoltaic inverter technology and the improvement of efficiency, its heat dissipation form has changed from the original all fan heat dissipation to the following three mainstream heat dissipation designs

1. Advantages of fan free design of integrated die-casting mold: first, the upper and lower mold shells are integrated for heat dissipation, which not only greatly increases the heat dissipation area, but also greatly reduces the heat transfer impedance; Secondly, the internal heat source device can provide excellent heat dissipation, which not only ensures the internal and external heat dissipation balance of the inverter, but also makes all kinds of devices in the best working state

disadvantages: customers have misunderstandings about products with high power density and fan free design. It is considered that the insufficient heat dissipation of the device will reduce the power generation and affect the service life of the inverter

represents model 1: inverter of manufacturer H. The internal temperature of the inverter is consistent with that of the chassis shell. Under the condition of 45 ° ambient temperature, the internal temperature is about 55 ° C

represents model 2: inverter of manufacturer y. The internal temperature of the inverter is consistent with that of the chassis shell. Under the condition of 45 ° ambient temperature, the internal temperature is about 60 ° C

scheme 2: ordinary sheet metal external fan design

advantage: the surface temperature of the chassis is low

disadvantages: the heat sink of the inverter is small. Although part of the heat of the internal heat source device can be taken away by the fan, the heat dissipation of the whole heat source device is not uniform. Not only that, the inverter also has the problems of high heat dissipation impedance between the external box and the internal heat source devices, and the internal heat is not easy to transfer to the surface of the box, so that the temperature of the internal devices is much higher than the surface of the box, which may lead to the derating of the equipment or the reduction of the long-term heating life of the internal devices

represents model 1: inverter of s manufacturer. The internal temperature of the inverter is about 15 degrees higher than the chassis shell temperature, and the internal temperature is about 65 degrees when the ambient temperature is 45 degrees

represents model 2: inverter of s manufacturer. The internal temperature of the inverter is about 15 degrees higher than the chassis shell temperature, and the internal temperature is about 70 degrees when the ambient temperature is 45 degrees

scheme 3: ordinary sheet metal fan free design

advantages: internal heat flow exchange design, which can quickly transmit the heat flow of internal heat source devices to the surface of the inverter

disadvantages: the shell is designed for non die casting mold, and the heat dissipation impedance and heat dissipation area are inferior to those of die casting mold products. Not only the surface temperature of the inverter is high, but also a larger radiator (increasing the volume of the chassis) is required for support

represents model 1: G manufacturer inverter. The internal temperature of the inverter is about 15 degrees lower than the shell temperature of the chassis. When the ambient temperature is 45 degrees, the internal temperature is about 55 degrees, but the surface temperature is as high as about 75 degrees

conclusion: through the above analysis and data, it is not difficult to find that the surface temperature of the outer box of the inverter without fan design (as shown in scheme 1 and scheme 3) is significantly higher than that of the inverter with fan design, and this temperature can often reach 60 ℃. But don't worry that it will cause fire if it is hot, because this is only the temperature of the outer box (60 degrees of the outer box belongs to the normal working range of the fan less inverter), and the internal temperature of the equipment is lower. The reason why this design is adopted is to ensure the service life of the device and the derating operation of the power station, so as to ensure the power generation; Looking at the inverter shown in scheme 2, it is a typical case that lower surface temperature corresponds to higher internal temperature. It is conceivable that working in such an internal environment will reduce the service life of the inverter. At this point, you may be unable to help but ask "what kind of design shengnengjie products adopt". The answer is very clear: shengnengjie products adopt the integrated design of fanless die-casting mold, and the reasonable internal heat dissipation layout ensures the best heat dissipation, longer service life and stable operation of the inverter

about Shenzhen shengnengjie Technology Co., Ltd.

Shenzhen shengnengjie Technology Co., Ltd. focuses on the research and development, production, sales and services of photovoltaic inverter products. Relying on the strong supply chain of the group's parent company, Yayuan Technology Co., Ltd. and the advanced carbon fiber materials developed by production practitioners, it brings together top R & D talents, senior markets, products and sales teams in the industry at home and abroad, Adhering to the enterprise spirit of "professionalism, integrity, innovation and win-win", Shenzhen is the starting point, facing China and the world. Shengnengjie Shenzhen production base is equipped with highly automated production equipment, and its manufacturing capacity and production capacity rank in the forefront of the industry, and has won the title of national high-tech enterprise

as the holding parent company of shengnengjie technology, Yayuan Technology Co., Ltd. is a world-renowned power electronic product design manufacturer, which is characterized by projects covering graphene and two-dimensional materials. Its hardware sales will soon enter the flight in 2017, with a sales volume of US $300million. It ranks first in the world in the market share of external power adapters for communications, printers and storage equipment, At the same time, the PV Inverter with prime volt brand has been sold in Taiwan, Europe and the United States for more than ten years, and has the second market share in Taiwan

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