The development path of Chinese domestic VFD (Variable-frequency Drive) and servo machine industry is tortuous

The strength of Chinese VFD (Variable-frequency Drive) supporting industry is relatively weak. Generally speaking, there is a gap between Chinese domestic brands and foreign brands in terms of technology, processing and manufacturing, industrial design, and financial strength. China is a big country in the injection molding machine industry, with an increase of 80,000 to 90,000 injection molding machines every year, and the power of servo drives for injection molding machines is generally relatively large. It is expected that the company's servo system business revenue will still double in 2011.

The development experience of VFD (Variable-frequency Drive) in China is even more tortuous, and the problems are mainly divided into four aspects:

First, foreign brands monopolize the market. In the 1990s, China imported high-voltage VFD (Variable-frequency Drive) as a supporting key project. At this time, domestic customers in China were not aware of the energy-saving effect, and the product price was relatively high.

Second, Chinese domestic companies have discovered the high-voltage frequency conversion market and are seeking technological breakthroughs, but they are faced with two major problems: customer distrust and product instability. Although the price is lower than half of foreign brands, due to performance problems, Chinese domestic companies can only Get orders from small customers.

Thirdly, Chinese domestic enterprises have made breakthroughs. First of all, through accumulation, technical problems are no longer difficult, reliability has met customer requirements, and brands are gradually established. Foreign brands generally lag behind local enterprises in terms of service, giving Chinese domestic enterprises good opportunities for development. , Sunwoele and other Chinese domestic brands have become market leaders in one fell swoop.

Fourth, Chinese domestic companies are in full bloom. When large customers realize that foreign brands no longer monopolize the market, they turn more attention to Chinese domestic companies, and Chinese localization process accelerates.

The development trend of VFD (Variable-frequency Drive) in China is: the AC drive, the high frequency of the power converter, the digitalization, intelligence and networking of the control. Therefore, China wants to have a greater role in the injection molding machine. , VFD (Variable-frequency Drive) research and development and technology updates are indispensable.

For the plastic product industry, power consumption is the main part of its production cost, and injection molding machines are one of the main energy-consuming equipment in plastic product factories: most of the injection molding machines are hydraulic transmission injection molding machines at present, and the hydraulic transmission system The power is provided by the electric motor driving the oil pump. During the production cycle of injection molding, the flow rate and pressure required by the injection molding machine are different in different processes, and flow and pressure required by different processes must be adjusted by flow valves and pressure valves. The load of the hydraulic system varies greatly. Since the fixed displacement pump cannot adjust the output power, the excess energy can only be consumed in the baffle plate, oil leakage, and oil temperature rise.

On the whole, due to the immaturity of Chinese domestic medium and low voltage VFD (Variable-frequency Drive) market, high product prices, and limited user knowledge of products in the early stage, it is relatively easy for new entrants to make profits and develop, so entry barriers Not high, which is one of the main reasons why there are so many domestic brands in China. With the maturity of Chinese domestic market and the intensification of competition, the barriers to entry have been greatly increased in the past two or three years, and a large number of existing smaller brands are destined to be gradually eliminated by the market.