Rules of fine motor speed (VFD Variable frequency drive) for pumps and fans.

      In theory, the power of the water pump and fan controllers, valves can restrict flow to the right, but it turned out that energy loss only slightly, since reduced. The system also caused most of the valves, Figure 1, the speed reduction, to reduce the engine power to pump water and to respect the laws of affinity.

 

Figure 1 compares the performance of pumps, valves and cooling of the regulator to control the speed.

The rules for controlling the motor speed to regulate the flow.

 

          All electrical appliances are all energy needs. But when properly organized and controlled energy. To reduce energy consumption and energy efficiency. In this case, the electric motor control system. When comparing the use of motors, which is a nearly constant speed, the speed of the motor under load can rotate, the power consumption is lower than the normal fans (see affinity ..)  

1. The flow rate will vary according to speed.

                               

 2. The pressure will vary the speed squared.

3. The power used to vary the speed Example three.

       If the previous report shows that, if the flow is reduced by reducing the speed, power, a reduction of 50% to 8 times the voltage (in theory). If a transfer. What seems to be more efficient. If it is moving at a constant speed, the speed of the additional space. By reducing the engine speed can be used to control the drive according to the equation.

If 

n = speed.

f = Frequency
P = number of poles.

       Lower than all previous ones. You can see that you self-manage their use of electricity and its practical application and can be used in automatic control.

       Variable frequency drive (VFD) applications can work on multiple tasks. Please use this equipment cooling water for cooling water. We need to know the proper flow of this model the flow of water and electricity. If it seems that the value is greater than the norm, we consider the cooling capacity of the pump. Evaluate the potential energy in the system.