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Permanent magnet (asynchronous) air compressor transformation plan

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market situation

The permanent magnet variable frequency air compressor is a kind of variable frequency air compressor, which occupies an important position in the market of variable frequency air compressor.

The permanent magnet variable frequency air compressor is recognized by the customers because of its good energy saving. The difference between the permanent magnet variable frequency air compressor and the power frequency air compressor is that the permanent magnet frequency conversion air compressor is added to the frequency converter and the frequency converter is used. To control the actual input power to achieve energy saving, but the frequency converter is the impact of industrial products on the service life and peripheral environment.

1. The frequency conversion fault caused by voltage instability confirms the input voltage and ensures the stability of the voltage;

2. Inverter failure caused by high temperature, check whether the heat dissipation channel of the inverter is blocked, whether the cooling fan is damaged, and timely maintenance;

3, the fault caused by the inverter itself, the motherboard damage, etc., check the internal components of the inverter;

4. The inverter alarm caused by the main motor fault, check whether the main motor is running normally and repair in time;

In the actual use process, if the inverter alarms, we can restart the power supply. If the alarm does not continue to be eliminated, it is recommended to repair the air compressor manufacturer or the inverter manufacturer, and the professional after-sales service engineer will perform the maintenance because, currently, on the market. The display of the inverter is represented by the corresponding code. Non-professionals should be careful.

First, the characteristics of permanent magnet air compressor

1. Since the permanent magnet variable frequency screw air compressor utilizes the stepless speed regulation characteristic of the frequency converter, it can be smoothly started by the PID regulator inside the controller or the frequency converter; it can be quickly adjusted in the occasion where the fluctuation of the gas consumption is relatively large. response;

2. Compared with the upper and lower limit switch control of the power frequency operation, the air pressure stability is exponentially improved.

Second, the permanent magnet frequency conversion air compressor starts without impact:

1. Since the inverter itself contains the function of the soft starter, the starting current is within 1.2 times of the rated current, and the starting shock is small compared with the power frequency starting generally 6 times of the rated current.

2. This kind of impact is not only on the grid, but also on the entire mechanical system.

Third, permanent magnet frequency conversion air compressor variable flow control:

1. The power frequency driven air compressor can only work in one exhaust volume, and the variable frequency screw air compressor can work in a wide range of exhaust gas. The frequency converter adjusts the motor speed in real time according to the actual gas consumption to control the displacement.

2. When the gas consumption is low, the screw air compressor can be automatically dormant, which greatly reduces the energy loss.

3. Optimized control strategy can further improve energy saving effect.

Fourth, the permanent magnet variable frequency air compressor AC power supply voltage adaptability is better:

1. Due to the overmodulation technology adopted by the inverter, when the AC power supply voltage is slightly lower, it can still output enough torque to drive the motor to work; when the voltage is slightly higher, it will not cause the voltage output to the motor to be high;

2. For self-generated occasions, the variable frequency drive can show its advantages;

3. According to the characteristics of the motor VF (the variable frequency air compressor works below the rated voltage in the energy-saving state), the effect is obvious for the site with low grid voltage.

Five, permanent magnet frequency conversion air compressor noise is low:

1. Most working conditions of the frequency conversion system are lower than the rated speed, the mechanical noise and wear of the main machine are reduced, and the maintenance and service life are prolonged;

2. If the fan is also driven by variable frequency, it can significantly reduce the noise when the air compressor is working.

The difference between frequency conversion and power frequency is obvious. The energy saving advantage and efficiency advantage of permanent magnet variable frequency screw air compressor are the necessary means to win the market.

Product advantages

At present, most of the permanent magnet synchronous air compressors on the domestic market are sold by air compressor manufacturers and inverters. The controller is used to control the inverter to control the motor. After the inverter is damaged in the production process, it usually takes many days to contact the manufacturer. Respond, arrange personnel to check and repair, this will cause the machine to work for a long time, affecting normal production,

Now we have introduced a self-contained air compressor variable frequency integrated cabinet. The internal controller and the frequency conversion have been communicated. The parameters are set to the factory setting. Say goodbye to the communication problem when replacing the inverter. The controller line inside the inverter unit is pulled out. The adapter board solves the cumbersome and complicated wiring on site, and the field personnel only need to:

1. Connect the original power supply and motor cable to the inverter

2. Connect the loading valve, fan KM5 and neutral to the adapter plate.

3. Connect the temperature and pressure sensor to the adapter plate

It can be free from the air compressor manufacturer and can quickly solve the passive situation of production stoppage caused by the fault of the inverter in the field. The air compressor variable frequency integrated cabinet adopts simple installation, the price is fair, and the control interface is simpler and more convenient.