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What is the difference between ordinary motor and variable frequency motor of screw air compressor

We all know that in the design of screw air compressors, there is an important component, that is, the motor, which is divided into ordinary motors and variable frequency motors. Ordinary motors can run stably only in the rated state, but variable frequency motors do not need them. They can run stably with speed regulation according to different loads and demands. So what is the difference between the ordinary motor of the screw air compressor and the variable frequency motor, let's briefly talk about it: 1. The speed of the ordinary motor cannot be adjusted, it has a fixed speed, and the variable frequency motor can adjust the speed, so as to achieve the purpose of energy saving. 2. For motors of the same size, the iron core section of ordinary motors is smaller, the number of coil turns is small, the wire diameter is small, and the insulation is low. The frequency conversion motor is just the opposite. 3. The frequency conversion motor increases the electromagnetic load on the basis of the ordinary motor. 4. The insulation of ordinary motor slots is poor, the insulation materials used are relatively poor, and the thickness of the slot insulation is not enough.

Advantages of screw air compressor air compressor

Advantages of screw air compressors: High reliability. The screw compressor has few parts, no wearing parts, reliable operation, long service life, and the overhaul interval can reach 40,000-80,000 hours. Easy to operate and maintain. Operators do not need long-term professional training, and can realize unattended operation. Power balance is good. There is no unbalanced inertial force, the machine can work smoothly at high speed, especially suitable for use as a mobile compressor, with small size, light weight and small footprint. Adaptable. It has the characteristics of forced gas delivery, and the exhaust volume is almost not affected by the exhaust pressure. Multiphase mixed loss. There is actually a gap between the rotor tooth surfaces of the screw compressor, so it is resistant to liquid impact, and can be pressure-feeding liquid-containing gas, dust-containing gas, and easily polymerized gas.

Features of Air Compressor

The compressor is directly driven by the electric motor to make the crankshaft rotate, and the connecting rod is driven to make the piston reciprocate, causing the cylinder volume to change. Due to the change of the pressure in the cylinder, the air enters the cylinder through the air filter (muffler) through the intake valve. During the compression stroke, due to the reduction of the cylinder volume, the compressed air passes through the exhaust valve and passes through the exhaust pipe. The direction valve (check valve) enters the air storage tank, and when the exhaust pressure reaches the rated pressure of 0.7MPa, it is controlled by the pressure switch and automatically stops. When the pressure of the air storage tank drops to 0.5--0.6MPa, the pressure switch is automatically connected and started. The air compressor is the core equipment of the pneumatic system and the main body of the electromechanical bleed air source device. It is a device that converts the mechanical energy of the prime mover (usually an electric motor or a diesel engine) into gas pressure energy. Air pressure generator.

What is an air compressor?

An air compressor is a device used to compress gas. The air compressor is similar in construction to the water pump. Most air compressors are reciprocating piston, rotary vane or rotary screw. Centrifugal compressors are very large applications. An air compressor is a device that converts electrical energy into compressed air. Compressed air refers to air that has a certain pressure after being compressed. "