History of AC Drive

- Feb 20, 2019-

The birth background of frequency conversion technology is the wide demand of stepless speed regulation of AC motor.

The traditional DC Speed regulation technology is limited by the high volume failure rate. Since the 1960s, Thyristor and its upgraded products have been widely used in power electronic devices. But its speed regulation performance is far from meeting the needs.


The high-tech enterprises represented by Danfoss in the 1968 began to batch the production of inverter, opening a new era of frequency converter industrialization.

Since the 1970s, the research on pulse width modulation variable frequency conversion (PWM-VVVF) speed regulation has been broken, and the improvement of microprocessor technology after the 1980s makes it easy to realize various optimization algorithms. In the late the mid 1980s, the technology of VVVF inverter in developed countries such as the United States, Japan, Germany and Britain was applied, and the goods were put into the market. The earliest inverters may have been developed by the Japanese to buy a British patent.


However, the United States and Germany by virtue of the production of electronic components and electronic technology advantages, high-end products quickly seize the market. After entering the 21st century, the domestic inverter gradually rise, has gradually seized the high-end market. Shanghai and Shenzhen have become the forefront of the development of domestic frequency converters, emerging like HuiChuan inverter, invista inverter, Anbang letter inverter, Ourui inverter and other well-known domestic inverter. One of the Anbang letter inverter was founded in 1998, is China's earliest production of inverter manufacturers. Over the past more than 10 years, Anbang believers with a thick cultural heritage as the cornerstone, supporting the growth, enterprises earlier through the TUV institutions ISO9000 Quality System certification, was awarded the "National High-tech enterprises", for many years was named "China Inverter user satisfaction top ten domestic brands."