Electrical Propulsion

Question 1

Electrical propulsion

A gas turbine

Answer 1

A gas turbine provides extra propulsion for sprinting.
Connected to a gearbox.
Gearbox connected to propeller shaft.

Question 2

Electrical propulsion

Answer 2

Water is an excellent medium for the transmission of sound.
The reductions in self noise generated by the ship is essential.
There are two reasons for this:
-Reduce the range at which our ship can be detected
-Reduce own interference with the towed array sonar operation.

Question 3

Electrical propulsion

Answer 3

An electric motor drive is used for propulsion.

Question 4

Electric motor system is comprised of nine basic components

Answer 4

• Air filter
• Cooling fans
• Yoke
• Compole
• Main pole
• Yoke
• Armature
• Commutator
• Brush gear

Question 5

Electric motor system

Answer 5

The warm air is now vented, through an air cooler, to the engine space.

Question 6

Electrical propulsion

Shaft Revolutions per min

Answer 6

• Shaft RPM is used to control the speed of the ship.
• The 600V system is run in parallel.
• for how much gen is next flash card.

Question 7

SRPM

Answer 7

2 generators = 65 SRPM = 8-9 knots
3 generators = 80 SRPM = 10-12 knots
4 generators = 90 SRPM = 14 Knots

Question 8

Electrical propulsion converter

Answer 8

The propulsion converter is normally controlled remotely.

Propulsion motors can be controlled from the local control panels.

Question 9

Electrical propulsion LCPs

Answer 9

The LCP are situated within the converter regulators.
There is a 3 position selector switch with the positions:
-Remote
-Reversionary 1
-Reversionary 2