Frequency converter output voltage and voltage, power relationship - Database & Sql Blog Articles

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The output frequency of the inverter is closely related to several factors such as voltage, power, and current. Here are some key relationships:

1. **Inverter Output Frequency vs. Output Voltage**: The output frequency of the inverter is directly proportional to the output voltage. For example, if the output frequency is adjusted from 50Hz to 30Hz, the measured output voltage might be 232V. In this case, the output frequency is 60% of the rated frequency, and the output voltage is also 60% of the input voltage.

2. **Inverter Output Frequency vs. Input Power**: The output frequency is proportional to the cube of the input power. Let's say the motor's rated power is 100KW, and when the output frequency is reduced from 50Hz to 30Hz, the input power decreases to 21.6KW. This relationship helps in understanding how power affects frequency control.

3. **Inverter Output Frequency vs. Input Current**: Similarly, the output frequency is proportional to the cube of the input current. If the motor's rated current is 200A and the output frequency is adjusted from 50Hz to 30Hz, the input current drops to approximately 43.2A. This shows how current changes with frequency adjustments.

Understanding these relationships is essential for optimizing inverter performance and ensuring stable operation under varying load conditions.