The frequency converter is an important member of the industrial automation field. With the rapid development of China's automation industry, the product performance and stability of China's excellent inverter brand has surpassed many foreign brands in some aspects, and the market share of domestic brands has gradually increased.
The rapid development of automation industry, domestic inverter market share gradually increased
The English translation of the frequency converter is VFD (Variable-frequency Drive), which may be one of the few examples of modern technology translated from Chinese into English. Inverter is the application of frequency conversion technology and microelectronics technology, by changing the frequency and amplitude of the motor power supply to control the AC motor power transmission components.
The inverter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), brake unit, drive unit, and detection unit micro-processing unit. The frequency converter is one of the three-phase motor drive control devices. In the field of industrial automation, its role and position are decisive and indispensable.
At the beginning of its birth, the frequency converter was designed for the most commonly used three-phase asynchronous squirrel-cage motors. The speed formula of the three-phase asynchronous motor is n=60f(1-s)/p, by changing the input frequency of the motor. In turn, changing the speed of the motor is the most thorough and convenient and reliable way. The instantaneous current when the motor is directly started is 6~8 times that of the normal stable operation, and the step-down starting is 4~5 times, while the frequency conversion speed regulation will not exceed 1.5 times the rated current of the inverter, no matter whether it is impact on the grid or the adaptability of the equipment. The benefits are obvious.
The market size of China's high-voltage inverters is about 35-40 billion, and the decline rate in 2016 is slightly higher than that of low-voltage inverters. At present, Hekang New Energy has a market share of about 14% in the field of high-voltage frequency converters and ranks first in market share. Schneider's successful acquisition of Lead Huafu brings opportunities for the domestic high-voltage inverter industry to reshape. The demand for high-voltage inverters comes from two aspects: production process and energy-saving transformation.
During the R&D process, first of all, for the consideration of the safety of the internal components of the frequency converter, multiple detection and protection were added. For example, the maximum permissible current of the frequency converter inverter module does not exceed 2 times of the rated value, and the maximum allowable electrolytic capacitor is The temperature is 85°C, electromagnetic compatibility design, etc., coupled with the detection and feedback of the load side (such as motor temperature detection and protection, instantaneous power down, etc.) make today's inverter highly intelligent and not only able to protect itself The normal use of safety also greatly protects the safe operation of front and rear equipment.
At present, in the field of inverters, the market of low-voltage inverters has declined slightly and the market concentration has declined. Except that the two giants ABB and Siemens occupy 21% of the market share, the market share of 3-10 companies is not much different. The brand's share in the domestic inverter market remains at 60%-70%. Although domestic brands have risen this year, but the market share is still not obvious, such as Huichuan City, accounting for 6%, ranking third; Invidia is 4%, among the top ten low-voltage inverter manufacturers.
The gap between domestic brands such as Inovance Technologies and international brands ABB and Siemens is also shrinking. ABB, Siemens, etc. mainly focus on mid-to-high-end markets, and product applications mainly focus on project-based markets such as cranes, metallurgy, building materials, machine tools, and food and beverages; while Huichuan, Delta, and Schneider, etc., who are in the second camp, mainly focus on Low-end OEM and high-end fan pump market. From the perspective of market share, Huichuan Technology is firmly occupying the third position in the low-voltage inverter market share.
At present, the traditional heavy industry industry in China is still in the period of structural adjustment, and the market demand tends to be flat. In mines, metallurgy, and power industries, due to the adjustment of energy structure, new projects tend to be reduced or postponed. In the oil, petrochemical and chemical industries, the price of crude oil fluctuates, and the number of start-ups also tends to decrease.
The energy-saving transformation of the future stock market will become the main theme of the development of the industry. According to calculations, the motor system using the high-voltage inverter technology saves an average of 30% of electricity, and the energy-saving effect is significant. As most of the downstream state-owned large and medium-sized enterprises are energy-intensive, they expect more policy support in the future and promote energy-saving transformation to land on a larger scale.
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