Aug 20, 2020
Analysis of China's inverter market
The frequency converter is mainly used to adjust the speed of AC motors (asynchronous motors or synchronous motors). It is recognized as the most ideal and most promising speed regulation scheme for AC motors. In addition to its excellent speed regulation performance, frequency converters also have significant Energy-saving function is an ideal speed regulating device for enterprise technological transformation and product upgrading. Since being introduced to China in the 1980s, frequency converters have been rapidly developed and widely used as an increasingly important automation equipment in energy-saving applications and speed process control. In electric power, textile and chemical fiber, building materials, petroleum, chemical industry, metallurgy, municipal administration, papermaking, food and beverage, tobacco and other industries, as well as public works (central air conditioning, water supply, water treatment, elevators, etc.), inverters are playing an important role .
(1) Inverter and energy saving
The original purpose of the frequency converter is speed control, but the current domestic application is more energy saving. China is a big energy-consuming country with low energy utilization rate and insufficient energy reserves. In China's electricity consumption in 2003, 60-70% was power electricity, and of the total capacity of 580 million kilowatts of electric motors, only less than 20 million kilowatts of electric motors were controlled by inverters. According to the analysis of the market research report of gongkong.com, there are at least 180 million kilowatts of motors with variable loads and energy saving potential in China. Therefore, the country vigorously advocates energy-saving measures, and emphatically recommends frequency conversion technology.
The application of frequency conversion speed regulation can greatly improve the control accuracy of the motor speed and make the motor run at the most energy-saving speed. Taking the fan and water pump as an example, according to the principle of fluid mechanics, the shaft power is proportional to the third power of the speed. When the required air volume decreases and the fan speed decreases, its power decreases according to the third power of the speed. Therefore, the power saving effect of precise speed regulation is very considerable. Similarly, many variable load motors generally produce motor capacity according to the maximum demand, so the design margin is too large. In actual operation, the proportion of light-load operation time is very high. If frequency conversion is adopted, the work efficiency during light load operation can be greatly improved. Therefore, the energy saving potential of variable load is huge.
For the purpose of energy saving, frequency converters are widely used in industries such as electric power, metallurgy, petroleum, chemical industry, municipal administration, central air conditioning, and water treatment. Taking the power industry as an example, due to the large-scale lack of electricity in China, power investment will continue to grow. At the same time, the national power reform plan puts forward requirements for the cost control of power plants, and reducing internal power consumption has become the focus of power plants. Therefore, frequency converters have Huge potential for development, especially high-voltage inverters and high-power inverters. The market research report of gongkong.com shows that in the power industry alone, the market size of inverters in 2003 reached 250 million yuan. Therefore, the energy-saving application prospect of the frequency converter is very broad.
(2) Inverter and process control (speed control)
At present, China's equipment control level is relatively low compared with developed countries, and the manufacturing process and efficiency are not high. However, with China's entry into the WTO, product quality and production efficiency need to face international competition, so improving the level of equipment control is crucial. Because frequency conversion speed regulation has the advantages of wide speed regulation range, high speed regulation accuracy, and good dynamic response, in many applications that require precise speed control, frequency converters are playing a significant role in improving process quality and production efficiency.
Take the textile industry as an example. China has the world's largest production capacity for textile products, with a global market and a huge industry. The textile and chemical fiber industry is also the industry with the most frequency converter applications and the highest density. Among the most common chemical fiber machinery and equipment, frequency converters are used for screw extruders, spinning machines and post-processing machines. The cotton spinning equipment that uses more frequency converters mainly includes spinning frame, roving frame, combing machine, etc. These equipments require precise speed control, multi-unit synchronous transmission or proportional synchronous (draft) transmission, etc. The application of frequency converters can increase process requirements and improve product quality, while reducing labor intensity and improving production efficiency. It can be said that Inverter is an important equipment for the textile industry to enhance international competitiveness. According to a market survey conducted by gongkong.com, the market scale of inverters in the textile and chemical fiber industries exceeded 1 billion yuan in 2003.
In addition, in the food, beverage, packaging, paper, machine tool, elevator and other industries, domestic enterprises need to expand production scale and improve production technology. The application prospects and development potential of frequency converters cannot be underestimated.
(3) Frequency conversion household appliances
In addition to industry-related industries, in ordinary households, more and more attention is paid to saving electricity bills, improving the performance of home appliances, and protecting the environment. Frequency conversion home appliances have become another broad market and application trend of frequency converters. Refrigerators, washing machines, household air conditioners, etc. with frequency conversion control have great advantages in saving electricity, reducing voltage impact, reducing noise, and improving control accuracy. At present, China is the world's most important home appliance supplier, but the proportion of home appliances using frequency converters is very low. In Japan, more than 90% of home appliances are controlled by frequency conversion. According to the survey, in 2003, China's frequency conversion household appliances increased by more than 200% year-on-year, but frequency conversion household appliances reflected in the market are rare. Therefore, frequency conversion household appliances have very good development potential.
(4) The promising Chinese inverter market
China has a huge industrial cluster and maintains a sustained and stable development; to be in line with international standards, many companies need to enhance their international competitiveness; people’s quality of life continues to improve, etc. These are the growth drivers of the inverter market and the basis for wider applications.
The 2004 China Inverter Market Research Report released by gongkong.com shows that China's inverter market has maintained a rapid growth of 12%-20% in the past few years. In 2003, due to the rapid development of the industrial and construction industries and various industries The large amount of investment in that year reached nearly 40% year-on-year growth, and the market size exceeded RMB 5.5 billion. Entering 2004, due to the sudden increase in the market base in 2003, coupled with the country's strengthening of the macro-control of metallurgy, building materials and other industries, the market growth rate of frequency converters will drop significantly. However, due to the overall rapid development of China’s economy and China’s accession to the WTO, the market’s requirements for products will gradually increase, and it is imperative to improve the level of production equipment. Inverters used for production process control will be increasingly used. On the one hand, China's electricity supply and demand are seriously unbalanced, and the phenomenon of limited power supply during peak seasons is common, and there are unprecedented calls for energy conservation. Therefore, in the next three years, China's frequency converter market will still maintain a rapid growth of about 10%. The market research report of gongkong.com believes that at least 10 years later, China's frequency converter market will become saturated and mature. Therefore, China's frequency converter market has broad room for development.