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Advantages of variable frequency speed regulation in the use of fans:
The new tunnel construction-specific variable-unit energy-saving ventilator supporting frequency conversion controller can double the efficiency of the ventilator while the original power supply conditions remain unchanged, overcoming the traditional startup method that requires the power supply capacity of the power grid to be the normal workload. More than 2 times the insulator, especially in remote construction sites, it solves the various disadvantages that are very difficult to realize the demand for large capacity of power grids and transmission lines. Its characteristics are as follows:
1. Use changes in frequency to control the speed of the fan. During tunnel excavation, due to different distances, the fan speed can be controlled arbitrarily to obtain effective air volume and wind pressure to meet the safety of tunnel construction and achieve energy saving effects.
2. Realize soft start, which can make the motor start and run smoothly, and the impact current during the acceleration of the motor is small. The starting current is only 1.2 times of the fixed current, which saves electric energy, avoids the impact on the power grid, and ensures power transformation. Safety of equipment and other electrical appliances.
3. Adjusting the air volume is continuously convenient and reliable. It can be preset in sections and adjusted continuously and smoothly.
4. Improve the power factor of the motor, reduce the reactive power loss of the transformer, increase its active power and extend the life of the transformer. It is safe and reliable.
5. The operation is simple. According to all parameters displayed on the panel, the status of the fan in use can be viewed intuitively. If you need to input or modify operating parameters, you can operate the numeric keys on the panel to complete it quickly and easily.
6. Complete protection functions: overcurrent, overload, undervoltage, overvoltage, overload, phase loss, short circuit, so that the motor will always work in a safe state.
7. Sound and light alarm: realize automatic shutdown of fault.
8. Realize local and remote monitoring. It can be connected to the industrial control host computer through the RS485 asynchronous serial interface to realize centralized control of the dispatch room and improve the level of automation.
9. It has real-time detection and display functions.
10.Wide adjustment range and high precision.
11.The use of multi-stage fans can ensure that each motor can achieve uniform operation at any time and anywhere, which is safe and reliable.
12. The high starting torque can meet the requirements of fan starting and operating specifications. Since the load of the fan is relatively special, it starts and runs on load. For high starting torque, the fan can be started softly normally to achieve flexible control of the equipment.
13. It can realize online speed adjustment, and can also realize remote centralized control by connecting to the host computer through the RS485 asynchronous serial interface and MOOEO-BUS communication protocol to improve the level of automation.
14.In terms of power supply configuration, the transformer capacity is only equal to 1.2 times the total power of the motor, and the safe current carrying capacity of the power line is equal to 1.2 to 1.5 times the rated motor, which greatly saves limited resources and makes full use of resources. The frequency conversion device is equipped with imported filter capacitors, which makes the COSφ of the motor greater than 0.95, reducing the reactive power loss of the main transformer and greatly increasing its active power margin.
