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Function of frequency converter

Jan 20, 2019

1. Frequency conversion energy saving

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 operate under full load, in addition to meeting the requirements of power drive, the extra 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, the 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.

2. Power factor compensation energy saving

Reactive power not only increase the line loss and equipment of fever, more important is the lower power factor resulting in a loss of active power grid, a large number of reactive power consumption, in the middle of the line equipment use low efficiency, waste is serious, using variable frequency speed regulating device, the effect of frequency converter due to the internal filter capacitor, thus reducing reactive power loss, increase the active power of power grid.

3. Soft start energy saving

1: the hard start of the motor will cause serious impact on the power grid, and it will also have high requirements on the power grid capacity. The large current and vibration generated during the start will cause great damage to the baffle plate and valve, and will be extremely adverse to the service life of the equipment and pipeline. After using the frequency conversion energy-saving device, the soft start function of the frequency converter will make the starting current start from scratch, and the maximum value will not exceed the rated current, which can reduce the impact on the power grid and the demand for power supply capacity, and extend the service life of the equipment and the valve. Saved the maintenance cost of equipment.

2: theoretically, the inverter can be used in all mechanical equipment with motor, motor at startup, will be more than 5 to 6 times the rated current, not only affect the service life of motor and consumes more electricity. The system in the motor when the design selection will have a certain margin, 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. The inverter can realize soft start and power compensation