Salem , I hope you are well.
We already own a P=1.5 kw, Us=400v/230V, Is=3.7 A /6.4 A asynchronous machine. We would like to use this machine as a double-fed asynchronous generator (wind turbine), but the nameplate does not indicate the rated rotor current.
We've carried out numerous tests at different rotor frequencies (6 Hz, 12 Hz, 14 Hz), but each time the generator's rotor current increases by more than 12 A, whereas we want a stator voltage Us = 400 (v).
What are the maximum values for rotor current, rotor phase-to-phase voltage and rotor frequency, to protect our machine?
It is important to consider the machine's thermal limits and electrical constraints.
1. Rotor Current: The maximum allowable rotor current will depend on the machine's design and thermal limitations. Exceeding the rated current for an extended period can lead to overheating and potentially damage the generator. The manufacturer's documentation should provide the rated current or guidelines for maximum allowable rotor current.
2. Rotor Phase-to-Phase Voltage: Similar to rotor current, the maximum allowable rotor phase-to-phase voltage will depend on the generator's design and insulation capabilities. Exceeding the rated voltage can result in insulation breakdown and damage to the machine. Again, refer to the manufacturer's documentation for specific values.
3. Rotor Frequency: The maximum allowable rotor frequency is typically determined by the mechanical and electrical design of the generator. Going beyond the rated frequency can lead to increased mechanical stress and potential damage to the rotor and other components. The manufacturer's documentation should specify the maximum allowable rotor frequency.
Good luck: partial credit AI
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