How is the output voltage of an inductor-type inverter controlled?

The output voltage of an inductor-type inverter is primarily controlled by the DC stator field current. In a typical configuration, the inverter converts DC input to AC output. The voltage output is influenced by the strength of the magnetic field in the stator, which is determined by the field current. By adjusting the field current, one can effectively regulate the magnetic field strength, leading to changes in output voltage.

As the field current increases, the magnetic field becomes stronger, which in turn raises the induced voltage in the coils of the inverter. Conversely, reducing the field current decreases the magnetic field strength, thus lowering the output voltage. This relationship between field current and voltage output is critical for achieving desired performance in various electrical load conditions.

Other options do not address the fundamental mechanisms involved in controlling the output voltage of an inductor-type inverter. A mechanical switch would not provide the necessary fine-tuned control over voltage changes and is generally used for on/off operations. The generator's RPM can influence output characteristics but is not the primary means to control voltage. The main electrical bus serves as a distribution point for power rather than a control mechanism for the inverter's output voltage.