Using a synchronous electric motor for the propulsion system leads to an efficient drive train with a sensitive control. In contrast to direct drives, the propeller of the diesel-electric propulsion is operated by an electric motor, which draws power from a diesel generator.
What is the difference between electric and diesel propulsion?
Diesel-electric drive takes less space than the equivalent direct-drive two-stroke engine allowing the aft section to be slimmer and giving better flow over the propeller. Not only is the diesel-electric drive train lighter than a two-stroke engine, but also its weight can be distributed more evenly.
What is an electric propulsion system?
Electric Propulsion (EP) is a class of space propulsion which makes use of electrical power to accelerate a propellant by different possible electrical and/or magnetic means. … Unlike chemical systems, electric propulsion requires very little mass to accelerate a spacecraft.
How does a diesel-electric propulsion system work?
In diesel-electric systems, multiple diesel engines, each driving an electric generator, produce the electric power that energizes the electric motors connected to the propellers as well as other electrical loads on the ship. … Many of our ship diesel-electric designs use multiple engines of different sizes.
What are the advantages of electric propulsion?
It provides improved maneuverability and high redundancy. Increased payload through flexible location of machinery components. Environmental benefits from lower fuel consumption and emissions. High performance in harsh ice conditions due to maximum torque at zero speed.
What is a propulsion engine?
Propulsion means to push forward or drive an object forward. A propulsion system is a machine that produces thrust to push an object forward. … We will discuss four principal propulsion systems: the propeller, the turbine (or jet) engine, the ramjet, and the rocket.
What is a diesel-electric motor?
A diesel-electric locomotive is equipped with a diesel engine that spins a generator (DC) or alternator (AC) to create electricity. This electricity then powers the heavy electric motors that move the train forward. A diesel-electric locomotive has no mechanical connection between the prime mover and the axles.
What type of motor is used in electric propulsion?
In this research we found out that one motor is commonly used for the propulsion of seagoing vessels. This is the synchronous motor. Another commonly used motor is the induction motor.
What are the disadvantages of electric propulsion system?
Disadvantages include a higher initial cost when compared to propulsion systems based on internal combustion engines, increased energy conversion loss from fuel to propulsion, and a larger system volume due to the large number of component parts.
What are the advantages of diesel-electric?
They include a more efficient propulsion system, less pollution, increased operational efficiency, especially at slow speeds (important for applications such as dynamic positioning), and flexibility in locating machinery compartments.
What voltage do diesel-electric locomotives work?
Batteries. The locomotive operates on a nominal 64-volt electrical system.
What are the advantage and disadvantage of diesel-electric traction?
Main advantages of the drive are low investment and flexibility of the routs and have the disadvantages of low overload capacity, uneconomical operation, high maintenance cost and short life.
What is the scope of electric propulsion?
Today’s most important applications of electric propulsion are on geostationary telecommunications satellites, such as ESA’s Artemis, where the technology is used to move the satellite from its initial transfer orbit to its final orbit around the Earth and to maintain that orbit throughout the satellite’s operational …
What is the major advantage of a diesel-electric propulsion plant over other drive systems?
They include a more efficient propulsion system, less pollution, increased operational efficiency, especially at slow speeds (important for applications such as dynamic positioning), and flexibility in locating machinery compartments. The chief disadvantage is high up-front cost.
What is mechanical propulsion?
In mechanical propulsion, fuel or some other stored energy is converted into mechanical energy by accelerating incoming fluid and thereby generating thrust in accordance with Newton’s Third Law. … Thus, accelerating a larger amount of fluid (higher ) to a higher velocity (larger Ve) generates more thrust.