Sixty is a number that everyone in China has been thinking about recently. Yes, 60 years, 60 years of the rise of new China, one end is connected with the devastated old society, and the other end is connected with the thriving new China!

Sixty-one Jiazi, a small group of waves in the long history, is only a brief moment in China's 5,000-year history, but new China has completed its transformation from ruins to a world power, a seemingly impossible task.

Keywords 1: growth

According to the survey and statistics of this journal, in 2008, the market scale of frequency converters in China exceeded 65.438+0.2 billion, with more than 220 brands and installed capacity exceeding 30 million kW. In recent ten years, the domestic inverter market has maintained a growth rate of 12%~ 15%. Although the global economy suffered a severe impact in 2008, the inverter market in China still maintained a growth rate of about 10%.

Keyword 2: Localization

2 1 century, domestic frequency converters have made unprecedented development. Up to now, there are more than 100 frequency conversion enterprises in China, and the technology has made great progress.

Keyword 3: Localization

In the past ten years, foreign-funded enterprises have made a lot of fruitful efforts in the localization of inverter industry in China. The rapid development of domestic inverter industry is inseparable from the localization strategy of foreign-funded enterprises.

Keywords: vector control

Vector control takes the direction of space magnetic field vector of AC motor as the reference direction of coordinate axis, and the stator current of the motor is orthogonally decomposed into excitation current component consistent with the magnetic field direction and torque current component perpendicular to the magnetic field direction through coordinate transformation, and then it can be controlled like DC motor. Vector control theory has opened up a broad space for AC speed regulation.

Keyword 5: Direct Torque Control

Direct torque control has simple structure, clear physical concept of control signal processing, fast torque response and no overshoot. This is a new high-performance AC speed regulation method. Direct torque control has completed another leap in AC speed regulation.

Keyword 6: High-voltage frequency converter

There is a saying in the inverter industry that whoever has the technical advantages of high-voltage inverter will occupy a place in the inverter industry and even the industrial control field. At present, more than a dozen domestic enterprises have the ability to produce high-voltage inverters, and domestic brands account for more than 50% of the market share.

Keyword 7: Matrix frequency converter

The matrix AC-AC converter can realize the power of 1, the input current is sinusoidal, and it can run in four quadrants. The system has high power density and light weight. However, public opinion believes that although the prospect of matrix inverter is very attractive, it cannot be commercialized at present because of its high cost.

Keyword 8: M&A and Fusion

Foreign giants will look to some domestic inverter manufacturers with strong competitiveness, and quickly enter the China market or consolidate their position in the Asia-Pacific region and even the global industrial chain through mergers and acquisitions. Some domestic frequency conversion enterprises have also established alliances to expand their competitiveness in the industry.

Keyword 9: Energy saving

On April 1 2008, the new energy law came into effect, which made it clear from the law that saving resources is the basic national policy of our country. As the most direct product of energy saving, the development of frequency converter has met a rare good opportunity.

Keywords: 10: internationalization

With the deepening of economic globalization and integration, the inverter industry in China is actively "bringing in", and a number of outstanding enterprises are also actively "going out". In 2008, the economic crisis hit the global economy hard, and users paid more and more attention to the cost performance of products, which created unprecedented opportunities for China frequency conversion enterprises to "go global".

There may not be three thousand words.