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 in order to achieve the back end drive AC motor soft start, frequency conversion speed and improve operating accuracy, and over-current, over-voltage, overload protection. Compared with the past mechanical speed regulation, the range of variable frequency speed regulation is wide, and it can reach 100% ~ 5% ; the regulation precision is high, and it can reach 0.5% ; because it is stepless speed regulation, it can realize the soft start of motor and the automatic control of the whole production system, to reduce the impact on the grid. The efficiency of frequency converter is as high as 30% ~ 60% . When it is used, it only needs to be installed in the front of the motor, and the change to the original equipment is small. Therefore, in the fifteen plan for the upgrading of manufacturing equipment and industrial energy conservation and environmental protection projects, established that the future development of the industry will still follow the path of both speed regulation and energy conservation. The domestic enterprises will focus on the development of Control and driving technologies. The high-voltage frequency converters rely on energy-saving and environmental protection policies, in the lower reaches, the transformation of large-scale industrial equipment such as electric power, metallurgy and cement is still the main task, and intensified competition will stimulate the localization of high-performance products.

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愿你是阳光，明媚不忧伤。