How much do you know about the advantages of permanent magnet variable frequency air compressor?

With the development of science and technology, air compressor, as an important pneumatic equipment, is widely used in machinery, building materials, electronic power, chemical, food, textile and other industries. Air compressor is a high energy consumption equipment, some industries accounted for more than 30% of the production power consumption. In 2011, the country officially promoted energy-saving air compressor technology permanent magnet variable frequency air compressor, because of its high efficiency, energy saving, pressure stability and other characteristics of the air compressor market is now the most popular products. The original energy-consuming air compressors on the market are slowly being replaced and replaced by permanent magnet variable frequency air compressors, which bring cost savings of more than 30%-40% for users.

The principle of permanent magnet variable frequency air compressor is dependent on permanent magnet synchronous motor rare earth. The working principle of permanent magnet variable frequency air compressor is the same as that of electric excitation synchronous motor, the former excites with permanent magnet instead of excitation winding. When the three-phase stator windings of the permanent magnet motor (each with a difference of 120° electrical Angle) are passed into the three-phase alternating current with a frequency of f, a rotating magnetic field will be generated at a synchronous speed. In steady state, the main pole magnetic field rotates synchronously with the rotating magnetic field, so the rotor speed is also synchronous speed. The stator rotating magnetic field is always relatively static with the main pole magnetic field established by the permanent magnet, and they interact with each other and generate electromagnetic torque, which drives the motor to rotate and carry out energy conversion. Permanent magnet variable frequency air compressor adopts permanent magnet rare earth permanent magnet synchronous motor (PM motor), the screw host and permanent magnet motor share the same spindle, the motor has no bearing, the rotor with permanent magnet is directly installed on the extension shaft of the positive rotor, the transmission efficiency is 100%. This structure eliminates the traditional motor bearing fault points and realizes the motor maintenance-free. Permanent magnet variable frequency air compressor summary has the following advantages:

1, stable air pressure; Because the air compressor uses the stepless speed regulation characteristic of the inverter, it can start gently through the controller or PID regulator inside the inverter. For the occasion of large fluctuations in gas consumption, it can quickly adjust the response.

2, due to the use of inverter drive, so the air compressor at the start of the time, the use of "soft start". This has a certain protective effect on the motor, reducing the possibility of burning the motor, the maximum starting current is less than 2 times the rated current, and the starting impact is small. This impact is not only on the power grid, but also on the entire mechanical system, which is greatly reduced.

3, permanent magnet variable frequency air machine variable flow control; Variable frequency air compressor can work in a wide range of displacement. The frequency converter adjusts the motor speed in real time according to the actual gas consumption to control the exhaust volume. When the air consumption is low, the air compressor can also be automatically hibernated, which greatly reduces the loss of energy. The optimized control strategy can further improve the energy saving effect.

4. Permanent magnet variable frequency screw compressors have better adaptability to AC power supply voltage. The inverter utilizes over-modulation technology, which allows it to output sufficient torque even at slightly lower AC power supply voltage to drive the motor. Moreover, when the voltage is slightly higher, the motor voltage will not output excessively high values. This makes variable frequency drive particularly advantageous in self-generating scenarios. Since the motor of the variable frequency compressor operates at a voltage below the rated voltage in energy-saving mode, it shows significant benefits in locations with low grid voltage.

5. In most operating conditions, the variable frequency system operates at speeds lower than the rated speed, resulting in reduced mechanical vibrations, lower noise levels, and decreased wear on the main unit. This extends maintenance and service life, making it suitable for a wider range of applications. If the fan is also driven by variable frequency, it further reduces the noise during compressor operation.

6. The permanent magnet variable frequency screw compressors have a smaller volume and are lighter than conventional three-phase motor units, reducing the overall size of the machine. The integrated screw unit is approximately half the size of a regular unit, and the lubricating oil needed for maintenance is about 50% of that required for a conventional screw compressor, resulting in significant savings in maintenance costs.

7. Permanent magnet variable frequency screw compressors adopt rare earth permanent magnet synchronous motors that maintain their magnetism up to 120℃ and have a lifespan of up to 10 years. The screw unit and motor in the permanent magnet variable frequency compressor share the same main shaft, eliminating the need for belts and couplings, resulting in a transmission efficiency of 99%. The motor operates without bearings, eliminating potential bearing failures and requiring less maintenance, thus increasing durability.

Are the major advantages of permanent magnet variable frequency air compressors enough to make you excited?

It can not only reduce costs, energy saving and environmental protection, work efficiency and noise pollution is also very low. When choosing permanent magnet variable frequency air compressors, you must ask the sales staff to clearly understand the relevant energy-saving meaning, recognize the brand, and avoid buying fake products and losing too much.