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Is it better to adjust the single frequency high voltage or the main frequency low voltage with the 38000 inverter of the giant family?

The giant family's 38000 frequency converter, adjusting single frequency high voltage and main frequency low voltage is better than adjusting main frequency low voltage. The 38000 inverter of Giant Family is best to adjust single frequency high voltage or main frequency low voltage. Compared with power frequency low voltage, high voltage performance is good, power is high, high and low voltage performance is poor, power is small, and calorific value is small.