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. Inverters have been known as VVVF (Variable Voltage Variable Frequency Inverter) due to the influence of Japanese manufacturers in Asian regions such as China and Korea.
The birth background of frequency conversion technology is the extensive demand for stepless speed regulation of AC motors. The traditional DC speed regulation technology is limited due to its high volumetric failure rate. After the 1960s, thyristors and their upgraded products were commonly used in power electronic devices. However, its speed control performance can not meet the needs. Since the 1970s, the pulse-width-modulated variable-voltage-variable (PWM-VVVF) speed control system has achieved breakthroughs. The improvement of microprocessor technology since the 1980s has made it easy to implement various optimization algorithms. In the middle and late 1980s, the VVVF inverter technology of the developed countries such as the United States, Japan, Germany, and Britain was put into practical use, and commodities were put into the market and widely used. The earliest inverters may have been developed by the Japanese who bought British patents. However, the United States and Germany rely on the advantages of electronic component production and electronic technology, and high-end products quickly seize the market. After entering the 21st century, domestic inverters have gradually emerged and are now gradually taking over the high-end market.
According to the survey data of the former State Economic and Trade Commission in 1997, the potential market for inverters nationwide is about 1200-1800 billion yuan. By the end of 2000, the domestic accumulative application of frequency conversion speed control devices was between 8 and 12 million kw, about 8 to 12 billion yuan, accounting for only about 7% of the potential market. Based on this, the major frequency-conversion production companies in the United States, Japan, and Europe have all gathered in the Chinese market, and foreign-invested inverters have once occupied more than 95% of China's inverter market share.
The development of a low-carbon economy has become a global consensus. Saving energy, reducing consumption, and building a resource-saving, environment-friendly society have become an eternal topic in today's social development. In the wave of this green revolution, the energy-saving link is very marginal economic benefits and promotion value. Compared with the lower proportion of clean energy sources at the global energy supply side and higher marginal cost, energy conservation is still the most popular and marginal economic benefit area in the green revolution.
Low-energy, low-pollution and low-carbon economy will be the only way for China's future development. Today, China is firmly promoting the low-carbon economy and related policies have been intensively introduced. As the most important electric equipment, electric motors convert electric energy into mechanical energy, and use electric motors as electric power sources for driving. The electric energy consumed by electric motors accounts for more than 60% of the total electric power generated in the country. Therefore, the state plans to ban the sale of non-efficient small and medium-sized motors after July 2011, but the penetration rate of high-efficiency motor market is only about 3%.
Motor energy consumption accounts for a high proportion of energy-saving potential. Through the frequency conversion and speed regulation of the motor, the average energy saving can be more than 30%, the energy saving effect is remarkable, and the motor energy saving space is huge. With the promotion of energy-saving policies, the inverter industry will usher in a new round of development. Morgan Stanley predicts that China's potential energy-saving market will reach 800 billion yuan.
Sure enough, whether it is consumer electronics or in the industrial sector, the use of frequency conversion technology to achieve the purpose of energy conservation has become the goal pursued by people. In the supermarket, rows of variable frequency air conditioners and variable frequency fans attract consumers' attention. In the factory, servo motors and frequency converters appear on the
Production Line, and they are making contributions to the company's energy conservation and consumption reduction targets.
China's inverter market is rapidly expanding. According to a China's domestic authoritative statistics, in the past few years, China's inverter market has maintained an annual growth rate of 25% to 35%, and its growth rate ranks first in the electrical industry. . According to data released by the Institute of Industry and Marketing of the Institute of Mechanical Industry Information, China's inverter market will become saturated after at least 10 years, and the overall market potential is 120 billion to 180 billion yuan.
According to Chen Jianyi, CEO of Welke China, the growth rate of the installed capacity (power) of the upconverter in the Chinese market is actually around 20%. According to this growth rate, China's inverter market will not develop until at least 15 years. Mature and gradually saturated.
The frequency converter is the core component of the motor's variable frequency speed regulation, and the potential size of the high voltage frequency converter market is estimated to be approximately RMB 81 billion. At present, the high-voltage motors that have been equipped with inverters are less than 10%, and it is expected that the compound annual growth rate of high-voltage inverters will reach 45% or more in the next three years The medium and low-voltage inverter market will maintain a sustained growth of about 15%, and it is expected to reach 19 billion yuan by 2012.
The inverter has unique characteristics in terms of energy saving, and it is in line with the Chinese government's green policy. The rapid development of the inverter industry in China will be inevitable. From the perspective of demand, inverters are gradually becoming more diversified, and the emergence of general-purpose and special-purpose products is to meet the diverse needs of users. At the same time, with the significant energy-saving effect of motor frequency conversion speed regulation, inverter products becoming more mature, the price drop significantly, enterprises actively invest in the transformation of the motor, the implementation of the target system of energy saving and consumption reduction, driving the rapid development of motor frequency control industry.
Of course, the high-speed development of the inverter industry is inseparable from the rapid growth and leading role of the dominant companies. Inverter companies respond to the challenges of different application areas through independent innovation, and inverters are constantly updating and upgrading, with improved functions and more diversified products. Among them, intelligent, all-digital, networked products are maturing. In addition, matrix inverters, green inverters and other new inverters have begun to enter the market.
At present, the domestic inverter companies follow the trend, find a way for their own business development, in their own areas of expertise to emerge. New products have become the main force of the company's development. Leading-edge integrated solutions and global joint security services are provided by many well-known domestic companies such as Leader Huafu, Zhiguang Electric, Yingwei Teng, Jiuzhou Electric, Senlan, and Zhongda Dentsu.
Stator Winding Line Co., Ltd. , http://www.windingline.com