Supplier of frequency converter supporting equipment: As an electronic circuit, the frequency converter itself also consumes power (about 3-5% of the rated power). A 1.5-horsepower air conditioner consumes 20-30 watts of electricity on its own, equivalent to a constant light.
It is a fact that frequency converters operate at the power frequency and have energy-saving functions. But the prerequisite is:
Firstly, it has high power and is a load for fans/pumps
Secondly, the device itself has energy-saving function (supported by software)
Thirdly, long-term continuous operation
The above are three conditions that reflect the energy-saving effect. If it is said that the frequency converter operates energy-saving without any preconditions, it is an exaggeration or commercial speculation. Knowing the truth, you will cleverly use it to serve you. Be sure to pay attention to the usage situation and conditions in order to apply it correctly, otherwise it is blind obedience.
Power factor compensation for energy saving
Reactive power not only increases line loss and equipment heating, but more importantly, the decrease in power factor leads to a reduction in active power in the power grid. A large amount of reactive energy is consumed in the lines, resulting in low equipment efficiency and serious waste.
After using a variable frequency speed regulation device, the effect of the internal filtering capacitor of the frequency converter reduces reactive power loss and increases the active power of the power grid.
Soft start energy-saving
Hard starting of motors causes serious impact on the power grid, and has high requirements for grid capacity. The large current and vibration generated during starting cause great damage to baffles and valves, which is extremely detrimental to the service life of equipment and pipelines.
After using the energy feedback device of the frequency converter, the soft start function of the frequency converter will start the starting current from zero, and the maximum value will not exceed the rated current, which can reduce the impact on the power grid and the requirements for power supply capacity, extend the service life of equipment and valves, and save equipment maintenance costs.
In theory, frequency converters can be used in all mechanical equipment with electric motors. When the motor is started, the current will be 5-6 times higher than the rated value, which not only affects the service life of the motor, but also consumes more electricity. When designing the system, there will be some margin in the selection of motors. The speed of the motor is fixed, but in actual use, it is sometimes necessary to operate at a lower or higher speed. Therefore, it is very necessary to carry out frequency conversion transformation.