Electrical Marine Engineering

Question: Discuss about the Electrical Marine Engineering. Answer: The most common cause for generators, especially brush-less ones not generating any voltage despite turning and running is because of residual magnetism. Generators operate by the movement of electrical conductors through magnetic fields; however, the generator does not have a magnet. Instead, it creates a magnetic field by using some of the voltage generator by the generator and converting it into direct current (DC) and feeding this voltage into a coil to create an electro-magnet. Residual magnetism is a small amount of magnetism left from the last instance the generator was running. This magnetism is sufficient to generate a small amount of electricity, needed to create a stronger magnetic field to produce voltage ('Contrelec', 2017). When the residual magnetism is lost, no power is produced at start up; the residual magnetism can be lost naturally when a load is connected to the generator when it is off or due to the generator not being used. The magnetism I also lost if the generator is run without a load for too long as to maintain the residual magnetism, the generators need to keep running (Bhattacharya, 2011). In order to steer the ship safely to the harbor, the generators running the refrigerators should be shut and the power it generates be used for steering purposes. Meanwhile, the nearby ships and port control should be informed about this over the radio so they are aware and prepare for any emergencies, while also clearing the area of other vessels (Bhattacharya, 2011). The connection to steering should be disconnected from the generator not producing voltage (after shutting it down) and the refrigeration generator connected to aid in steering the vessel safely to harbor. If there is a backup generator, then the ship can be steered safely to harbor using the backup generator. References Bhattacharya, S. (2011). Basic electrical engineering. 1st ed. Delhi: Pearson, p.526. 'Contrelec', (2017). Troubleshooting Generator Starting Problems (Ross Hill, Hill Graham SCR Systems). [online] Contrelec.co.uk. Available at: https://www.contrelec.co.uk/pages/troubleshooting-generator-starting?print=true%3E [Accessed 3 Apr. 2017].