Why do you often choose permanent magnet air compressors when purchasing air compressors

Why are users more interested in purchasing permanent magnet air compressors?

It is understood that the use of screw air compressor users more or less, or large or small are almost experienced the host or motor overload. When the screw air compressor is running under unloading conditions, its energy consumption rating is 30%-40%. The energy saving effect of permanent magnet motor is better than that of power frequency and ordinary frequency conversion in the case of low load.

For those who need full load operation of the air compressor for a long time, it is recommended to choose the water lubricated power frequency air compressor produced by Shanghai granklin group. it is best to choose the appropriate screw air compressor according to the air consumption.

The reasons for the failure of the air compressor overload trip are:

1. Loose wiring: check whether the power line of the input screw air compressor has heat generation and burning marks. Mainly check the three-phase electric input line and motor input line. If there is a loose or short circuit, it is best to reconnect.

2. The voltage is too low: the rated working voltage of ordinary screw air compressor is 380V, and the allowable fluctuation is about 5%. The voltage mentioned here refers to the voltage when the machine is running normally, because in many construction sites (the power supply voltage of the factory is relatively stable, generally there is no such situation), the transformer is relatively small, when the equipment is not turned on, the voltage is 400V, but when When the equipment is turned on, the voltage is reduced to 350V, normal operation, the voltage is only 360V, short-term use is not a big problem, if long-term use, it will cause great damage to the electrical system.

3, screw air compressor oil separator blockage: oil core blockage, high internal pressure, heavy load, large current, overload. Misunderstanding: Don't assume that things you haven't changed for a long time won't be blocked. The site environment is dirty, and the impurities in the oil and gas barrel are easy to block the oil. The environment of the new oil core is OK, but the running time is less than 200 hours, and the quality of the oil is also very important.

4, screw air compressor pressure exceeds the rated pressure: such as 0.7MPa, the actual pressure 0.75MPa, easy to appear overload phenomenon. The 7kg air compressor should not be adjusted to 8kg. First, security is not guaranteed. Second, the equipment withstand voltage is insufficient and the service life is shortened. How much pressure, how much pressure air compressor to buy, don't just chase its price, we should pursue cost performance.

5. Screw air compressor contactor failure: The internal contacts of the contactor are aging, the suction is poor, the contact surface is small, and the current is large. The overload of the air compressor is a small matter, and the burnout of the electrical system is something that everyone does not want to see.

In short, regardless of whether the use of frequency control, whether equipped with permanent magnet motor, as long as the long-term work under partial load, the efficiency of the screw air compressor is significantly lower than the rated state.

Through partial load operation, it is impractical and useless to avoid inefficient operation of screw air compressor under unloading conditions. To put it bluntly, the surface of energy saving! However, the production cost per cubic meter of compressed air has increased. For the user, the total amount of compressed air required per day depends only on the production needs, and has nothing to do with which air compressor is used. The screw air compressor runs for a long time under partial load and only consumes more electricity.