The inverter has been described as a power saving and energy saving control product in many materials or literatures. It has caused the concept of energy saving and power saving for the inverter itself, but it is actually a wrong understanding and the application of the inverter. Whether it can achieve the effect of saving electricity and saving energy depends on the specific conditions used.
The reason why the frequency converter can achieve the effect of saving electricity and energy in most cases is that the frequency conversion governor controls the motor speed, but in fact, most speed control devices can achieve this effect. Therefore, it is obvious that we cannot conclude that the inverter is an energy-saving product.
The premise of energy saving by inverters is the speed regulation characteristics of their loads. For those spare parts that have a significant effect on speed, such as centrifugal fans and centrifugal pumps, the inverter adjustment effect is obviously better than the adjustment effect of its own after the speed regulation. , Inverter in such a premise, you can actually achieve the effect of energy saving.
If the spare parts handled by the inverter are constant-torque loads or even constant-power loads, the power drop is not obvious or the power is kept constant under the condition that the speed is decreased. Therefore, the use of the inverter cannot be the same as before. The energy-saving effect of energy saving, or even completely unable to save electricity.
Whether there is a big difference between the use efficiency of the frequency conversion governor and the use efficiency of the digital DC governor, this issue also needs to be considered in conjunction with the actual situation. Under certain conditions, the DC motor has higher power and power factor than the AC motor. Higher, so the AC asynchronous motor and frequency converter and DC motor and DC governor, no more power.
The reason why the frequency converter can achieve the effect of saving electricity and energy in most cases is that the frequency conversion governor controls the motor speed, but in fact, most speed control devices can achieve this effect. Therefore, it is obvious that we cannot conclude that the inverter is an energy-saving product.
The premise of energy saving by inverters is the speed regulation characteristics of their loads. For those spare parts that have a significant effect on speed, such as centrifugal fans and centrifugal pumps, the inverter adjustment effect is obviously better than the adjustment effect of its own after the speed regulation. , Inverter in such a premise, you can actually achieve the effect of energy saving.
If the spare parts handled by the inverter are constant-torque loads or even constant-power loads, the power drop is not obvious or the power is kept constant under the condition that the speed is decreased. Therefore, the use of the inverter cannot be the same as before. The energy-saving effect of energy saving, or even completely unable to save electricity.
Whether there is a big difference between the use efficiency of the frequency conversion governor and the use efficiency of the digital DC governor, this issue also needs to be considered in conjunction with the actual situation. Under certain conditions, the DC motor has higher power and power factor than the AC motor. Higher, so the AC asynchronous motor and frequency converter and DC motor and DC governor, no more power.
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