The application scheme of Riye inverter on air compressor

Air compressors are widely used in various fields such as power, chemical industry, mining, metallurgy, refrigeration, etc. They are mainly used to provide a steady stream of compressed air with a certain pressure, such as supplying air to pneumatic valves and supplying air to processes that require a certain pressure gas. source. There are many types of air compressors. At present, screw air compressors have become the mainstream of future market demand due to their huge advantages in air volume, maintenance, energy saving, and service life. This has become the consensus of the industry and has been widely used in many industries. use.

The traditional solution is to use a loading and unloading valve to control the air supply of the air compressor. Due to the difference in the working cycle of the air equipment and the production process of the sticky end belt, the air volume fluctuates, resulting in frequent loading and unloading of the air compressor.

load:

In the loading state, after the pressure reaches a smaller value, the original control method determines that the pressure will continue to rise until the larger pressure value. During the pressurization process, more heat needs to be released to the outside world, resulting in power loss. On the other hand, the pressure of the gas higher than the larger value needs to be reduced by the pressure reducing valve before entering the pneumatic component. This process is also an energy-consuming process. And loading is a sudden process, which will have a greater impact on the equipment and the power grid.

Uninstall:

In the no-load state, when the pressure reaches a larger value, the air compressor reduces pressure and unloads by the following methods: close the intake valve to make the motor in an idling state, and at the same time vent the excess compressed air in the separation tank through the vent valve. This adjustment method will cause a lot of energy waste. According to estimates, the energy consumption of the air compressor during unloading accounts for about 10% to 25% of the air compressor's full load operation, which is still in the case of a small proportion of the unloading time. In other words, when the air compressor is running, it is idle for about 20% of the time, and it is doing useless work, which not only wastes electrical energy but also increases the mechanical wear of the equipment.

Aiming at these traditional shortcomings, and through in-depth research on the industry process, a special inverter for the screw air compressor industry has been explored.

The characteristics of the special inverter control system of the Riye CM series inverter for the air compressor industry:

1. Stable pipe network pressure: The variable-frequency screw air compressor utilizes the stepless speed regulation characteristics of the frequency converter, and the pressure can be quickly adjusted and controlled through the controller or the internal PID regulator of the frequency converter; it runs faster than the power frequency. Compared with the upper and lower limit switch control, the air pressure stability is improved exponentially;

2. Better energy-saving effect: The inverter adjusts the motor speed in real time according to the actual air consumption. When the air consumption is low, it can start automatic sleep, which can effectively reduce the idling time or prevent the screw compressor from entering the idling state, thereby greatly reducing Energy loss.

3. Start without shock: Since the inverter itself is a soft start device, the start button end band is larger at about twice the rated current. Compared with the power frequency startup, which is generally more than 6 times the rated current, the start shock is small. . Reduce the impact on the electrical components of the motor at the moment of starting, and extend the life of the motor and the contactor.

4. Reduced noise: As the number of frequent loading and unloading of the air compressor is reduced, the noise is also reduced accordingly

5. Improve working efficiency during operation: Since the compressor cannot rule out the possibility of long-term operation under full load, the capacity of the motor can only be determined according to the larger demand, so the design capacity is generally too large. In actual operation, the proportion of light-load operation time is very high. If the frequency conversion speed regulation is adopted, the work efficiency can be improved.

6. Improve the working performance of the compressor's sticky end belt: Because the inverter can be continuously adjusted very conveniently, it can keep the pressure, flow, temperature and other parameters stable. .

7. Good compatibility: Due to the use of modbus communication protocol, it can be used in conjunction with most of the dedicated controllers for air compressors on the market.

Features of Riye CM Series Inverter:

Time and power accumulation, display function, it is more convenient to observe the energy-saving effect.

Unique time accumulation function, which can display the time of single power-on operation

Time and accumulated running time.

Built-in 485 communication (please specify when ordering), support standard

MODBUS protocol can be controlled by computer network.

Multi-signal input, built-in simple PLC, automatic control is more convenient.

The carrier frequency is adjustable, up to 15KHZ, silent operation.

The control method is diversified, the versatility is strong, and the adaptability is wide.

Low-speed rated torque output, reachable at 0.01HZ starting

150% rated torque, stable operation.

Built-in PID adjustment function, simple closed-loop control.

Parameters can be easily adjusted through the keyboard, and 90% of the parameters can be adjusted online during operation.

Built-in brake unit, fast stop (limited to 0.75KW-7.5KW, other power ranges are optional).

The running state of the fan can be controlled, which saves electricity and prolongs the service life of wearing parts.

A variety of inverter operating status parameter display, the control signal and load operating status are clear at a glance.

A variety of extended function cards are available (PG card, communication function card, tension control card).