Reasonable capacity selection is itself an energy-saving measure. Based on the available information and experience, there are three simpler methods:
1) The actual power of the motor is determined. First, the actual power of the motor is determined, and the capacity of the inverter is selected.
2) Formula method. When a frequency converter is used for multiple motors, it should be met: at least consider the influence of the starting current of one motor to avoid the overcurrent trip of the frequency converter.
3) Motor rated current method frequency converter.
The inverter capacity selection process, in fact, is a frequency converter and the motor of the best matching process, the most common, and safer is to make the capacity of the frequency converter greater than or equal to the rated power of the motor, but the actual matching to consider the actual power of the motor and the rated power difference, usually the equipment selection capacity is large, and the actual required capacity is small, so the selection of the frequency converter according to the actual power of the motor is reasonable, to avoid the selection of the frequency converter is too large, so that the investment increases. For light loads, the inverter current should generally be selected according to 1.1N (N is the rated current of the motor), or according to the maximum motor power indicated by the manufacturer in the product and the output power rating of the inverter to be selected.