For example, which is more energy-efficient: a 100KW motor whose power is reduced to 60KW, or a motor that is already 60KW in capacity? Why?
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For example, between a 100KW variable-frequency motor that needs to operate at 60KW depending on the operating conditions and a 60KW motor, which one uses less electricity? Why?
The energy-saving advantage of variable-frequency motors lies in their ability to adapt to different loads. According to what the original poster described, such motors are not energy-efficient, as the voltage of the motor decreases when it operates in variable-frequency mode; this results in a higher current flow in the motor for the same power level, thereby reducing efficiency and causing the motor and cables to overheat
A 60KW motor running – that one uses less power :)
You’re right; my description wasn’t clear. A 50-liter air compressor with variable frequency operation runs at around 30 liters per minute depending on the working conditions. It is more energy-efficient than a 30-liter air compressor that operates at fixed frequency