The other functions of VFD
Soft start saving
1: The hard start of the motor has a serious impact on the power grid, and it will also require too much power grid capacity. The large current and vibration generation will cause great damage to the baffle and valve when the motor starts, which is extremely adverse to the service life of equipment and pipelines. After the use of frequency conversion energy saving device, the soft start function of frequency converter will make the starting current start from scratch, and the maximum value will not exceed the rated current, which reduces the impact on the grid and the requirement of power supply capacity, and extends the service life of equipment and valve, saving equipment maintenance costs.
2: Theoretically, the inverter can be used in all mechanical equipment with motor. When motor starts up, it will be more than 5 to 6 times the rated current, which affects the service life of motor and consumes more electricity. The system in the motor when the design selection will have a certain margin, and the speed of the motor is fixed, but in the actual use process, sometimes at a lower or higher speed, so the frequency conversion reform is very necessary. Frequency converter can realize motor soft start, compensation power factor.
Power factor compensates for energy saving
Reactive power not only increases the line loss and equipment of fever, more important thing is the lower power factor resulting in a loss of active power grid and a large number of reactive power consumption. Therefore, equipment use has low efficiency and waste is serious. After using variable frequency speed regulating device, because of the effect of frequency converter due to the internal filter capacitor, it reduces reactive power loss and increases the active power of power grid.