Shenling door machine frequency converter

Variable frequency Drive (VFD) is a kind of power control equipment that USES frequency conversion technology and microelectronics technology to control ac motor by changing the working power supply frequency of the motor.

The frequency converter is mainly composed of rectifier (ac to dc), filter, inverter (dc to ac), brake unit, driving unit, detection unit micro-processing unit and so on. Inverter on the internal IGBT off to adjust the output power supply voltage and frequency, according to the actual needs of the motor to provide the power supply voltage it needs, and then to achieve the purpose of energy saving, speed regulation, in addition, inverter has a lot of protection functions, such as over-current, over-voltage, overload protection and so on. With the continuous improvement of industrial automation, frequency converter has been widely used.

The energy saving of frequency converter is mainly reflected in the application of fan and water pump. In order to ensure the reliability of production, various production machinery in the design of the power drive, there is a certain amount of surplus. When the motor cannot run at full load, in addition to meeting the requirements of power drive, the excess torque increases the consumption of active power, resulting in the waste of electric energy. The traditional speed regulation method of fan, pump and other equipment is to adjust the inlet or outlet baffle, valve opening to adjust the air supply and water supply, its input power is large, and a lot of energy consumption in the baffle, valve closure process. When using frequency conversion speed regulation, if the flow requirements are reduced, by reducing the speed of the pump or fan can meet the requirements.