Inverter industry develops rapidly

The frequency conversion technology was first used to steplessly regulate the motor, and the output frequency was changed by controlling the on/off of the semiconductor device so as to realize the soft start, frequency control, and operation accuracy of the trailing-end drive AC motor, and to achieve over-current. , overvoltage, overload protection.

Industrial energy conservation has gradually become one of the core of industrial development. Due to its flexible speed control function, inverter products have obvious advantages in the field of power saving. The rear of the high-voltage frequency converter is mainly driven by fans and pump loads. The actual energy-saving effect reaches 30% to 60%. In the future, the development of the industry market will benefit from the transformation of large and medium-sized projects; the low-voltage inverter and the control layer and the execution layer equipment will be formed together. Automation control system, its future development will benefit from the upgrade of manufacturing equipment. From the current development trend, the inverter industry will continue to follow the development path of speed and energy conservation.

The frequency conversion technology was first used to steplessly regulate the motor, and the output frequency was changed by controlling the on/off of the semiconductor device so as to realize the soft start, frequency control, and operation accuracy of the trailing-end drive AC motor, and to achieve over-current. , overvoltage, overload protection.

Compared with the past mechanical speed control method, the frequency conversion speed control has a wide range, which can reach 100%~5%; the control accuracy is high and can reach 0.5%; because it is a stepless speed regulation, the soft start of the motor and the entire production system can be realized. Fully automatic control reduces the impact on the power grid. Relevant experts compared the effects of several major energy-saving products in electrical equipment, in which the efficiency of the inverter is as high as 30% to 60%. When used, it is only necessary to install it at the front of the motor, and the changes to the original equipment are minor.

Therefore, in the manufacturing equipment upgrade and industrial energy conservation and environmental protection projects proposed in the 12th Five-Year Plan, it is established that future industry development will still take the same path of speed regulation and energy conservation. Subdivided into products, it is expected that low-voltage inverters will be replaced by automation and import substitution as the main line. Domestic companies will focus on the development of control and drive technologies; high-voltage inverters will rely on national energy conservation and environmental protection policies, and the downstream industries will still be large-scale industrial equipment such as electricity, metallurgy and cement. Mainly to transform, intensified competition will stimulate the acceleration of localization of high-performance products.