Marine Electrical Systems USCG Question #1219 (Set 41)

What type of electric propulsion system converter is shown in the illustration? EL-0155

USCG Exam Illustration EL-0155
USCG Examination Diagram: Illustration EL-0155
Official USCG Answer & Rule Citation

Correct Answer: Option C — synchroconverter

The synchroconverter system utilizes a load-commutated inverter configuration. By using the motor's back EMF for commutation, it is specifically designed for large synchronous propulsion motors. This topology is distinct from PWM or cycloconverter systems and is commonly identified in marine electrical schematics by its specific thyristor bridge arrangement.

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