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Energy saving become a new topic of vfd industrial development

Release date: 2015-10-17
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With the continuous improvement of industrial automation, the variable frequency drive has been very widely used, energy conservation and environmental protection as the core of China's industrial economic development, at the same time for our industry indicate the direction of sustainable development, but also effectively pulling our variable frequency drive inverter industry sustainable development, so that our industry continues to drive the industry to expand market share, and by virtue of the strong development of power has become an important point of China's industrial economic development.

Frequency energy is mainly used in ac frequency converter motor speed through the implementation of changes in the mechanical properties change the drive to achieve the production process requirements of the occasion, more used in the fans, pumps. When the motor can run at the rated speed, the drive mechanism can only operate at a rated speed.
When the production process requires adjusting the process parameters, the only way to force change through the system resistance increase (decrease) traffic, the motor is always running at rated conditions, resulting in waste of energy. Such as fans, pumps and other equipment governor traditional method is through adjusting the outlet (or inlet) of the baffle, the valve opening amount is adjusted to the wind and to the water, in addition to energy consumption in vain, but also increases the system accessories, but also increases the probability of a system failure. When using frequency control, if the flow requirement is reduced by reducing the pump or fan speed to meet the requirements.

Taken together, the frequency converter 60hz to 50hz is mainly to achieve energy savings through power factor compensation and soft-start in two ways. Power factor compensation, due to reactive power line will increase heat loss and equipment, coupled with lower power factor resulting in lower power active power, reactive power consumption among a large number of circuits, equipment, inefficient use, waste. After using frequency control devices, the role of the frequency inverter internal filter capacitor, thereby reducing the reactive power loss, increasing the active grid.
Energy saving soft start the motor hard to start grid will cause serious impact, while the grid capacity requirements are too high, a large current and vibration when you start to baffle and valve damage is great, the use of equipment, piping life is extremely unfavorable. The use of inverter soft start function will start the current scratch, reducing the impact on the grid and the power supply capacity requirements, to extend the life of equipment and valves, thus saving the maintenance cost of the equipment.

But note that in using the drive on the "small horse cart" problem should be avoided. The reason for this problem is based on the working conditions at the time put into the design limits, so that the design and installation time to save money, many places have adopted variable frequency power is less than the motor nominal power setting. But with technology development, production technology conditions change, "small horse cart" problem inevitably arise, causing the drive cannot operate properly.

Thus, during the trial frequency devices, as a precaution, the adjustment should be detected in advance to avoid these problems. In addition, the drive normal use 6 years to 10 years after entering the high incidence of failure prone, often appear burned components, failure protection function frequent movement and other symptoms, seriously affecting its normal operation. For more information, please visit