China is now the world's largest manufacturing country. In the process of rapid development of the industrial market, inverters are used as power control equipment, and the market scale in China is continuously expanding. Chinese and foreign inverter companies are competing for market cakes and are fierce in this field. competition.
Inverter is the application of frequency conversion technology and microelectronics technology, by changing the frequency of motor power supply to control the AC motor power control equipment. Due to the development of control technology, the frequency converter has basic speed control. It also has a variety of arithmetic operations and intelligent control functions, the output accuracy of up to 0.1% -0.01%. It is also equipped with perfect detection and protection links, and it has been widely used in automation systems.
For example, in the printing, elevator, textile, machine tools, production lines and other industries speed control. Inverters are also widely used in the control of various mechanical equipment such as transmission, lifting, extrusion and machine tools. It can improve the level of technology and product quality, reduce equipment impact and noise, and extend equipment life.
The advantages of the frequency converter in the application of the mechanical industry simplify the control circuit. The use of the frequency converter is extremely convenient and can be controlled in full scale by a few terminals on its periphery. There are perfect protection measures inside the inverter. It is not necessary to design various protection circuits in its peripheral circuits. Because the inverter's forward and reverse operation is achieved through the control terminal to change the output phase of the inverter. Therefore, two large DC contactors can be used less than the original DC speed control system. With a vector-controlled frequency converter without a speed sensor, it is also possible to remove the speed sensor used as a speed feedback, which greatly simplifies the control circuit; standard asynchronous motors can be used. The adoption of cage asynchronous motor can exert its advantages of simple structure, sturdiness and durability, reliable operation, convenient maintenance and low price, avoiding the problems of regular replacement of DC motors and maintenance of brushes and commutators.
Easy to debug. The various operating parameters of the inverter are debugged through the intelligent keyboard and display. The setting is convenient, the change is flexible, and the debugging time is short. The debugging of the traditional DC speed regulation system involves the comprehensive adjustment of many parameters such as the trigger pulse phase adjustment and the speed negative feedback debugging. It is difficult to debug and has a long time, and it is difficult to achieve the optimal control.
In addition, use the frequency changer to change the cutting speed, choose the best economic efficiency cutting speed. After the speed is selected, changing the cutting speed by changing the diameter of the pulley and/or changing the motor is economical and convenient, which is an effective method for the machining industry to improve the processing quality and reduce the processing cost.
Foreign-funded enterprises account for the dominant market share. Currently, the growth rate of the installed capacity of upconverters in the Chinese market is about 20%, and the potential market space is about 120 billion to 180 billion yuan. Among them, low-voltage inverters account for about 60% of the market share, and the remaining 40% are occupied by medium- and high-voltage inverters. At present, foreign brands account for about 70% of China's inverter market.
The share of foreign brands in the domestic low- and medium-voltage inverter market is basically the same as in 2007, and it remains at around 76%. At the same time, due to factors such as increased investment in basic projects (traditional advantages of leading brands in Europe and America) and other factors, the top ten in 2008 The degree of concentration of foreign-funded enterprises has increased, especially the share of leading brands in the industry has further expanded.
The market share of domestic-funded corporate brands gradually overtakes the number of brands, with domestic brands accounting for more than 70%. With the rise of local brands, the market share of domestic-funded inverter companies has gradually expanded, especially in recent years, there has been a trend of accelerating the substitution of foreign brands. In 2005, the share of domestic-funded brands in the low- and medium-voltage inverter market was only about 15%. It reached 20% in 2006 and further expanded to 24% in 2007.
The share of domestic-funded brands has also surpassed the Korean-owned brands, Taiwan-funded brands, and even the Japanese brands that dominated the Chinese market in the 1990s, forming European and American brands, Japanese brands, and domestic-funded brands. According to this trend, it is entirely possible that the market share of domestic-funded brands exceeds that of European and American brands in the next five years (currently in the high-voltage frequency converter segment, domestic-funded brands have already completed this overtaking).
Inverter is the application of frequency conversion technology and microelectronics technology, by changing the frequency of motor power supply to control the AC motor power control equipment. Due to the development of control technology, the frequency converter has basic speed control. It also has a variety of arithmetic operations and intelligent control functions, the output accuracy of up to 0.1% -0.01%. It is also equipped with perfect detection and protection links, and it has been widely used in automation systems.
For example, in the printing, elevator, textile, machine tools, production lines and other industries speed control. Inverters are also widely used in the control of various mechanical equipment such as transmission, lifting, extrusion and machine tools. It can improve the level of technology and product quality, reduce equipment impact and noise, and extend equipment life.
The advantages of the frequency converter in the application of the mechanical industry simplify the control circuit. The use of the frequency converter is extremely convenient and can be controlled in full scale by a few terminals on its periphery. There are perfect protection measures inside the inverter. It is not necessary to design various protection circuits in its peripheral circuits. Because the inverter's forward and reverse operation is achieved through the control terminal to change the output phase of the inverter. Therefore, two large DC contactors can be used less than the original DC speed control system. With a vector-controlled frequency converter without a speed sensor, it is also possible to remove the speed sensor used as a speed feedback, which greatly simplifies the control circuit; standard asynchronous motors can be used. The adoption of cage asynchronous motor can exert its advantages of simple structure, sturdiness and durability, reliable operation, convenient maintenance and low price, avoiding the problems of regular replacement of DC motors and maintenance of brushes and commutators.
Easy to debug. The various operating parameters of the inverter are debugged through the intelligent keyboard and display. The setting is convenient, the change is flexible, and the debugging time is short. The debugging of the traditional DC speed regulation system involves the comprehensive adjustment of many parameters such as the trigger pulse phase adjustment and the speed negative feedback debugging. It is difficult to debug and has a long time, and it is difficult to achieve the optimal control.
In addition, use the frequency changer to change the cutting speed, choose the best economic efficiency cutting speed. After the speed is selected, changing the cutting speed by changing the diameter of the pulley and/or changing the motor is economical and convenient, which is an effective method for the machining industry to improve the processing quality and reduce the processing cost.
Foreign-funded enterprises account for the dominant market share. Currently, the growth rate of the installed capacity of upconverters in the Chinese market is about 20%, and the potential market space is about 120 billion to 180 billion yuan. Among them, low-voltage inverters account for about 60% of the market share, and the remaining 40% are occupied by medium- and high-voltage inverters. At present, foreign brands account for about 70% of China's inverter market.
The share of foreign brands in the domestic low- and medium-voltage inverter market is basically the same as in 2007, and it remains at around 76%. At the same time, due to factors such as increased investment in basic projects (traditional advantages of leading brands in Europe and America) and other factors, the top ten in 2008 The degree of concentration of foreign-funded enterprises has increased, especially the share of leading brands in the industry has further expanded.
The market share of domestic-funded corporate brands gradually overtakes the number of brands, with domestic brands accounting for more than 70%. With the rise of local brands, the market share of domestic-funded inverter companies has gradually expanded, especially in recent years, there has been a trend of accelerating the substitution of foreign brands. In 2005, the share of domestic-funded brands in the low- and medium-voltage inverter market was only about 15%. It reached 20% in 2006 and further expanded to 24% in 2007.
The share of domestic-funded brands has also surpassed the Korean-owned brands, Taiwan-funded brands, and even the Japanese brands that dominated the Chinese market in the 1990s, forming European and American brands, Japanese brands, and domestic-funded brands. According to this trend, it is entirely possible that the market share of domestic-funded brands exceeds that of European and American brands in the next five years (currently in the high-voltage frequency converter segment, domestic-funded brands have already completed this overtaking).
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