Therefore, energy consumption is approximately equal energy required by the system. With the system not to use variable frequency, not only wasting energy Tổn has caused great waste, which itself is the cause no harm to small systems. The van was quickly worn away, the more mechanical the system is under more pressure than necessary, and they break more quickly. Thus, it may take additional costs for system maintenance.

Solutions to the problem is the use of variable frequency to replace the van. On the basis of that company, Vietnam has creative solutions to control automatically, combined with energy efficient systems by automatic control (PLC) SIEMENS led through the variable frequency MICRO - MASTER 430 for engine pumps and fans of the system.

When active, the MM430 variable frequency control is only for a main pump. If actual demand greater ability to work by it, the system will turn the pump boot for the next until you meet the requirements. The process of booting the pump for this use only a soft boot.

Calculate energy savings of variable frequency is built on the basis of over temperature sensor to determine the optimal pumps, assuring meet practical requirements of the system, ie the technology requirements how much traffic different, the frequency variable will control for the engine of the pump or fan back in the wind speed varies. This will help the capacity consumption is reduced to a significantly. Therefore, traffic has outputs in accordance with practical requirements, not just use the liberated energy admits ...

For men in the tissue does not change, voltage ratio frequency is unchanged. However, loaded with pumps and fans, this law is a function 4 (voltage is the function of the 4 frequencies). This creates the characteristic function is described men_s 2-speed, in accordance with requirements of the pump by itself is also described men 2 function of voltage. Performance switch the source of the highly variable frequency, as used in the semiconductor manufacturing capacity by modern technology.

System is used to control valves have weaknesses in that, the required 80% level of traffic, it makes up to 96% capacity of the consumption list, while the variable frequency only 52%, ie system variables frequency can save 44% power. Although the reduction of the flow, energy consumption is also reduced, but Tổn hao on equipment such as control valves are still large.

Ability to automate system through the PID integration available for the driver within closed, the communication system with automatic RS485 on the frequency variable. Process to boot the system, the mechanical details of communication will be less wear new or broken Broken, ensuring high life. Therefore, costs for maintenance, system maintenance is reduced significantly.

This solution not only works effectively in many countries in the world that currently are being applied in Vietnam very much.

The total capacity Cosphi are always kept at 0.96, this makes for grid performance use and reduce costs for system compensation recriminate capacity, ensure the continued control, relevant to the absolute requires technology to save the downcast. All these benefits are increasing the quality of the process and save energy is very large.

When the van does not use (or to the open van available maximum), of course will not damage the van, the engine nor the capacity of the larger axis of needs. Coastal frequency of the principles of frequency change (with change voltage) should always ensure that models meet men boot load exceeding even in very low speed. Also included in the electric engine does not increase, due to coordination between the voltage and frequency to keep the students from the full scope of men. Boot line of the biggest changes the transmission frequency with the ink. Therefore, do not depreciate the net when you start, ensure other applications are unaffected.                                                                              According TKNL Center Hanoi, 15/04/2009