Analysis of Differences between Domestic High Voltage Inverters and Imported Products

With the further research of technology, the domestically produced high-voltage inverter in theory and function can already be compared with the imported inverter. However, due to the restriction of technology, the gap with imported products is still quite obvious.

In the 90s of last century, with the rapid economic development in our country, the frequency converter was rapidly popularized in the industrial field and was hit by the economic crisis in the 21st century. However, it did not disrupt the inverter market and maintained a steady state of development as a whole. With the continuous expansion of market demand for inverters, it also expanded the production scale of transformers .

At present, there are at least 200 low-voltage inverter manufacturers in China, most of which are low-voltage products of AC380V, while in domestic high-voltage frequency converters. With the further research of technology, the domestically produced high-voltage inverter in theory and function can already be compared with the imported inverter. However, due to the restriction of technology, the gap with imported products is still quite obvious. These conditions are mainly reflected in the following aspects:

1, the domestic high-voltage inverter technical standards have yet to be standardized.

2, and high-voltage inverter matching industry is underdeveloped.

3, the production process in general, to meet the technical requirements of inverter products, the price is relatively low.

4, the key components of the power semiconductor used in the inverter are completely dependent on imports, and will depend on imports for a long time.

5, has developed a power-down with instantaneous recovery, fault recovery and other functions of the inverter.

6, some manufacturers have developed a four-quadrant operation of high-voltage inverter.

7, the power of domestic high-voltage inverter is getting bigger and bigger, the largest domestic application has achieved 20000KW.

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