The strength of my country's inverter supporting industry is relatively weak. Generally speaking, domestic brands have gaps with foreign brands in terms of technology, processing and manufacturing, industrial design, and financial strength. China is a major country in the injection molding machine industry. 80,000 to 90,000 injection molding machine equipments are added every year. The power of the servo drive of the injection molding machine is generally relatively large. It is expected that the company's servo system business revenue will double in 2011.
The development experience of frequency converters in my country is even more tortuous, and the problems are mainly divided into four major areas:
First, foreign brands monopolize the market. In the 1990s, my country’s imported high-voltage inverters were mainly supporting key projects. At this time, domestic customers were not aware of the energy saving effect, and the product prices were higher.
Second, domestic companies have discovered the high-voltage inverter market and are looking for technological breakthroughs. However, they face two major problems: customer distrust and product instability. Although the selling price is less than half of that of foreign brands, domestic companies have to deal with small problems Get orders from customers.
Third, domestic companies have achieved breakthroughs. First of all, through accumulation, technology is no longer a problem. Reliability has met customer requirements. Brands have been gradually established. Foreign brands generally lag behind local companies in service, giving domestic companies good development opportunities. Domestic brands such as Dehuafu have become market leaders in one fell swoop.
Fourth, domestic enterprises are fully blossoming. When large customers realize that foreign brands no longer monopolize the market, they turn more attention to domestic enterprises, and the localization process accelerates.
The development trend of frequency converters in China is: the exchange of drives, the high frequency of power converters, the digitalization of control, intelligence and networking. Therefore, if China wants to have a greater role in injection molding machines, the development of frequency converters It is indispensable with technical updates.
For the plastic products industry, power consumption is the main part of its production cost, and the injection molding machine is one of the main energy-consuming equipment of the plastic products factory: at present, most injection molding machines belong to hydraulic transmission injection molding machines, hydraulic transmission systems The power is provided by the electric motor driven oil pump. In the production cycle of injection molding, the flow and pressure required by the injection molding machine in different processes are different, and the flow and pressure of the different processes must be adjusted by relying on the flow valve and the pressure valve. The load of the hydraulic system varies greatly. Since the fixed pump cannot adjust the output power, the excess energy can only be consumed in the baffle, oil circuit leakage, and oil temperature rise.
From the overall point of view, due to the immature domestic medium and low voltage inverter market, high product prices, and limited user knowledge of products in the early days, it is relatively easy for new entrants to profit and develop, so the barriers to entry are not high, which is also the current One of the main reasons for the numerous domestic brands. As the domestic market matures and competition intensifies, the barriers to entry have been greatly improved in the past two or three years, and a large number of smaller brands are destined to be gradually eliminated by the market.
