Does permanent magnet air compressor really save electricity

permanent magnet variable frequency air compressor really save electricity?

Literally speaking, we know that the permanent magnet variable frequency air compressor really saves electricity. We all know that the magnetic levitation train runs by magnetic force and has no resistance, so the train runs very fast. The motor of the permanent magnet variable frequency air compressor also uses this principle to rotate the rotor through the magnetic field generated by the AC voltage related to the stator coil and the magnetic force of the magnetic field. There is no excess loss, the transmission efficiency of permanent magnet motor is 100, and the natural output of gas will be more. Frequency converters are used in our lives. Frequency converters are also used in frequency conversion air conditioners, frequency conversion refrigerators and escalators in supermarkets. They run slowly when there is no load and quickly when there is load. Therefore, the permanent magnet variable frequency air compressor is a permanent magnet motor plus a frequency converter to save electricity.

How much electricity can permanent magnet variable frequency air compressor save?

Air compressor is a high energy consumption equipment, in some industries power consumption accounted for more than 30% of the production power consumption, so commonly known as "electric tiger", the reason is that the air compressor loading and unloading is very frequent. However, Red Fifth Ring found that some air compressor brand sales staff claim that their own enterprises to produce permanent magnet variable frequency air compressor can save more than 30% of the original, then really can save so much? Permanent magnet variable frequency air compressor power saving relative, the general asynchronous motor plus inverter energy saving in 10 ~ 20%, if the replacement of permanent magnet can be on the basis of this plus 3 ~ 5%, this data we know.

Let's take 37kw permanent magnet variable frequency air compressor as an example to calculate how much electricity can be saved. According to the average load rate of 70% and the annual operation of 6000 hours, a 37Kw permanent magnet variable frequency air compressor consumes electricity:

loading power consumption: 70% loading time * 6000 hours/year * 37Kw = 155400 degrees/year;

unloading electricity consumption: 30% unloading time * 6000 hours/year * 37Kw * 45% (electricity consumption during unloading) = 29970 degrees/year;

control the loss of electric energy in the pressure zone: (the pressure rises by 1bar and the power consumption rises by 7%, saving 2bar is equal to saving energy by 14%) 70% of the loading time * there is a pressure difference loss of 2kg 14% * 37Kw * 6000 hours/year = 21756 degrees/year.

Saved electric energy = lost electric energy of control pressure belt + unloading electricity consumption = 21756 degrees/year +29970 degrees/year = 51726 degrees/year. Calculated by 1 yuan per degree of electricity, this 37Kw permanent magnet variable frequency air compressor can save almost 50000 yuan per year for enterprises.