Frequently, customers have asked if the inverter can save power, but they have not understood why the inverter can save power, but at the same time, how much is saved by the high-frequency or low-frequency provinces?
First, the inverter can save power This is an indelible fact, in some cases can save more than 40%, but in some cases will be less than the inverter is not wasted!
Second, the inverter is to achieve energy savings through light load step-down, drag torque load because the speed is not much change, even if the voltage is reduced, it will not be a lot, so energy saving is very weak, but used in a fan environment is different, when When a small air volume is needed, the motor will reduce the speed. We know that the energy consumption of the fan is proportional to the 1.7 power of the speed, so the torque of the motor will drop sharply and the energy saving effect will be obvious. If we are used in oil wells, we will waste more electricity by using braking resistors on the return journey to waste a lot of energy.
Of course, if the environmental requirements must be adjusted, the inverter energy-saving effect is still more obvious. If the speed is not adjustable, the inverter will not save power and only improve the power factor.
Other related issues:
1. If two identical motors are operating at 50Hz power frequency, one inverter is used, one is not, and the speed and torque are under the rated state of the motor. Then, can the inverter save power? How much can it save? What?
A: In this case, the inverter can only improve the power factor and it cannot save power.
2. If the torque of the two motors does not reach the motor's rated torque (frequency, speed is the same as 50HZ), how much power can the inverter save?
Answer: If the automatic energy-saving operation is used, the inverter can run at a lower pressure at this time, which can save some electric energy, but the power saving is not obvious.
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