Exam Question
(a) Sketch a main engine shaft driven generator arrangement with an electronic system for frequency correction.
(b) Describe the operation of the generator arrangement sketched in (a).
Class 2 (2nd Engineer)
MET
📅 Jan 2024
Reference Answer
The a.c. shaft generator is a synchronous machine that produces alternating current with a frequency that is dictated by variations in engine speed. At the full rated r.p.m., the frequency may match with the electrical system.
The output is supplied to the static converter, which has two main parts:
Rectifier bridge -To convert/change shaft generator output from AC to DC.
Inverter - To change DC back to AC, at the correct frequency.
The output is supplied to the static converter, which has two main parts:
Rectifier bridge -To convert/change shaft generator output from AC to DC.
Inverter - To change DC back to AC, at the correct frequency.
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