Frequency technology was born a broad background variable speed AC motor needs. The traditional DC drive technology because of their size and the high failure rate application is limited. After the 1960s, the universal application of power electronic devices and upgrade thyristor. But its performance is far unable to meet the governor. Beginning in the 1970s, PSA Frequency Pulse Width Modulation (PWM? VVVF) speed to get a breakthrough, after the 1980s, complete microprocessor technology makes a variety of optimization algorithms can be easily implemented. 1980s, late VVVF inverter technology, the United States, Japan, Germany, Britain and other developed countries, practical, commodity into the market, has been widely used. According to the inverter industry market research and investment forecast analysis shows, the first Japanese to buy a converter may be developed by the UK patent. However, the US and Germany, with the advantages of electronic components and electronics production technology, high-end products quickly to seize the market. Into the 21st century, the gradual rise of the domestic inverter, has been gradually seize the high-end market. Today, China is unswervingly promote a low-carbon economy, policies have been introduced intensive. As the most important motor of electrical equipment, converts electrical energy into mechanical energy to drive the motor as a power source, its consumption of electricity consumes more than 60% of the country's total generating capacity. Therefore, the state planning after the July 2011 ban non-efficient small motors, but the current market penetration of high-efficiency motors around only 3%. The high proportion of motor energy consumption, energy-saving potential. Through the motor speed can average more than 30% energy saving, energy-saving effect is remarkable, huge electrical energy space. With the promotion of energy saving policy, the drive industry will usher in a new round of development. Morgan Stanley predicts that China's energy-saving potential market size of 800 billion yuan. Sure enough, or whether it is in the consumer electronics industry, the use of inverter technology to save energy become the pursuit of the goal. In the supermarket, rows of inverter air conditioner, inverter fan to attract the attention of consumers; in the factory, servo motor, inverter production line coming out, is for enterprises to achieve energy saving indicators contribute. Currently the installed capacity of the Chinese market (power) actually drive growth at around 20%, according to this growth rate, the Chinese inverter market to mature until at least 15 years and gradually saturated.