Industrial energy conservation is increasingly becoming a core aspect of industrial development. Variable frequency drives (VFDs ), with their flexible speed control capabilities, offer significant advantages in the field of power energy conservation. Based on current development trends, the VFD industry will continue to pursue a development path focused on speed control and energy saving.
Variable frequency drives (VFDs) are an important component of industrial control systems, installed at the front end of motors to achieve speed regulation and energy saving. High-voltage VFDs primarily drive loads such as fans and pumps, achieving actual energy savings of 30% to 60%. The future market development of this industry will benefit from the upgrading of large and medium-sized projects. Low-voltage VFDs, together with control and execution layer equipment, form automated control systems, and their future development will benefit from the "equipment upgrading" of the manufacturing industry.
Frequency converters have significant advantages in industrial applications; the 12th Five-Year Plan clearly outlines the industry's development plan.
Variable frequency technology was first used to continuously adjust the speed of motors. By controlling the on and off of semiconductor devices to change the output frequency, it enables soft starting, variable frequency speed control, and improved operating accuracy of AC motors driven by the downstream components, as well as overcurrent, overvoltage, and overload protection.
Compared with the traditional mechanical speed regulation method, frequency conversion speed regulation has a wide range, reaching 100% to 5%; high control accuracy, reaching ±0.5%; and because it is stepless speed regulation, it can realize soft start of motor and fully automatic control of the entire production system, thereby reducing the impact on the power grid.
Experts compared the effects of several major energy-saving products in electrical equipment, among which frequency converters have an efficiency of up to 30% to 60%, and only need to be installed at the front end of the motor, requiring minimal modification to the original equipment.
Therefore, the "12th Five-Year Plan" for manufacturing equipment upgrading and industrial energy conservation and environmental protection projects established that the future development of the industry will continue to follow the path of "simultaneous speed regulation and energy conservation." Specifically, low-voltage frequency converters are expected to focus on automation upgrades and import substitution, with domestic companies prioritizing the development of control and drive technologies. High-voltage frequency converters , relying on national energy conservation and environmental protection policies, will continue to see downstream applications primarily in the upgrading of large-scale industrial equipment in sectors such as power, metallurgy, and cement. Increased competition will stimulate the accelerated localization of high-performance products.
