Question 559Electricity/Electronics - Assistant Engineer70% to pass
The propulsion motor most often utilized in an AC drive system operating in the moderate to high power range is of what type?
AI Explanation
The correct answer is C) synchronous type with wound field.
In moderate to high power AC drive systems, the propulsion motor most often utilized is the synchronous type with wound field. This is because synchronous motors offer higher efficiency and better speed control capabilities compared to induction motors, which are more suitable for lower power applications. The wound field design allows for adjustable excitation, enabling precise speed and torque control, making synchronous motors the preferred choice for higher power marine propulsion systems.
The other options are incorrect because: A) wound rotor induction motors are less efficient and have limited speed control; B) squirrel cage induction motors are better suited for constant speed applications; and D) split phase induction motors are typically used for low-power, single-phase applications, not the moderate to high power ranges discussed in the question.
Related Questions
#557 As shown in figure "A" of the illustration, the load-commutated inverter drive illustrated has how many pulses? Illustration EL-0159 #558 How is the main shaft rotation on an AC diesel-electric propulsion vessel normally reversed? #560 As shown in the illustration, if the port propulsion motor field excitation circuit experienced a failure, what individual component failure would allow the use of the standby excitation transformer and standby field controller to resume normal operation? Illustration EL-0164 #561 What type of electric propulsion system converter is shown in the illustration? Illustration EL-0155 #562 As shown in figure "B" of the illustration, what statement is true concerning "regenerating" operation? Illustration EL-0162