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Some output frequencies of the inverter are related to voltage, power, etc.

Oct 24, 2020

Some output frequencies of the inverter are related to voltage, power, etc.

   1. Correspondence between inverter output frequency and output voltage: the inverter output frequency and output voltage are proportional. Example: When the output frequency is adjusted from 50Hz to 30Hz, the measured output voltage is 232V. At this time, the output frequency is 60% of the rated frequency, and the output voltage is also 60% of the input voltage.

   2. Correspondence between inverter output frequency and input power: The output frequency of the inverter is proportional to the cube of the input power. Example: When the output frequency is adjusted from 50Hz to 30Hz, the input power is reduced from the rated value to P input =

  Set: Motor rated power=100KW, then input power==21.6KW.

   3. Correspondence between inverter output frequency and input current: The output frequency of the inverter is proportional to the cube of the input current. Example: When the output frequency is adjusted from 50Hz to 30Hz, the input current is reduced from the rated value to P input =

  Set: Motor rated current=200A, then input power==43.2A.