Power electronic devices are one of the key points of the inverter, which means that the quality of the power electronics determines the advantages and disadvantages of the inverter. In the whole process of development, the relationship between the two is a state of mutual benefit and mutual promotion. That is to say, power electronic devices promote the development of frequency converters, and inverters promote the improvement of power electronic devices. .
In the past 50 years of history, when it comes to the import of technology and products, some people may argue that we are not completely "taken", and that we are taking the path of "introduction - digestion, absorption, and innovation". The technology introduced abroad is generally 70% after a few years of localization. However, I would like to say that this is only a superficial phenomenon. Most of the technologies we can introduce are on the periphery, and the core technologies that really involve power electronics, Foreign companies have refused to transfer. Nowadays, innovation is still the first step forward, but reform is a major direction. Power electronic devices have a decisive role for inverters, and continuous innovation is a development direction and driving force of inverters.
The development and research of China's power electronics has also made great progress. However, compared with the technological development in the same field in the world, there is still a big gap in China's technology, and due to the interests-driven factors, China's power electronics industry is increasingly “edgeâ€. "All", all walks of life have a wide range of needs, but are not willing to study on their own, using imports as a good medicine to solve problems. This situation has changed only after the strong support of national policies in recent years, but the effect is still not obvious. For a country's industrial development, we need more original innovations. Compared with the foreign technology dependence of 5% of developed countries in Europe and America, China's foreign technology dependence is as high as 50%. It shows that in innovation, we need to go. The road is still very long.
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