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How to use the frequency converter to save electricity?

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As an electronic circuit, the converter itself also consumes electricity (about 3-5% of rated power). A 1.5-piece air conditioner consumes 20-30W of electricity, which is equivalent to a long light. It is a fact that the frequency converter operates under the power frequency and has the function of saving electricity.

But the prerequisite is:

First, high power and fan/pump loads;

Secondly, the device itself has power saving function (software support);

Third, long-term continuous operation.

These are the three conditions that reflect the effect of power saving. If we do not add preconditions to say that the power frequency operation of frequency converters can save energy, it is exaggeration or commercial hype. Knowing the origin, you will use it skillfully to serve you. We must pay attention to the use of occasions and conditions in order to apply correctly, otherwise we will follow blindly.

Power Factor Compensation Energy Saving

Reactive power not only increases the line loss and equipment heating, but also reduces the active power of power grid due to the reduction of power factor. A large amount of reactive power is consumed in the circuit, and the equipment is inefficient and wasted seriously.

After using the frequency conversion speed regulating device, due to the function of the filter capacitor inside the frequency converter, the reactive power loss is reduced and the active power of the power grid is increased.

Soft Start Energy Saving

Hard startup of motors has a serious impact on the power grid, and it requires too high capacity of the power grid. The large current and vibration generated during startup cause great damage to the baffle and valve, which is extremely harmful to the service life of equipment and pipelines.

After using frequency conversion energy-saving device, the soft start function of frequency converter will make the starting current start from zero, and the maximum value will not exceed the rated current. It can reduce the impact on the power grid and the requirement of power supply capacity, prolong the service life of equipment and valves, and save the maintenance cost of equipment.

In theory, the frequency converter can be used in all mechanical equipments with motors. When the motor starts, the current will be 5-6 times higher than the rated value, which will not only affect the service life of the motor, but also consume more electricity. In the design of the system, there will be a certain margin in the selection of the motor. The speed of the motor is fixed and unchanged. But in the actual use process, sometimes it needs to run at a lower or higher speed. Therefore, it is necessary to carry out frequency conversion transformation.