A conventional drive system consists of a diesel engine, a transmission and a propeller. The components are coupled together via a shaft. the diesel engine is mechanically controlled by the throttle.
A major disadvantage of the conventional drive system is that the transmission is heavily used which causes early wear.
Additionally, a large amount of space is required for the shaft which connects the diesel engine and the gearbox (transmission) to the propeller. If the shaft rotates throughout the boat' s length, it may also result in increased noise levels.
HYBRID DRIVE SYSTEM
In a hybrid drive system, the "cable replace shaft" concept requires far less space. Energy is stored in a battery bank and supplied via cable to an electric motor. A synchronous (permanent magnet) electric motor is mechanically coupled directly to the ship propeller. These modern, dynamic permanent magnet motors have very high thrust even in the lower speed range. Battery-only operation, already required on many inland waterways and lakes, is now possible.
An efficient diesel generator can also be installed into the system. This is only required to run when the batteries need charging or a higher amount of continuos power is required.
Advantages:
-Space saving
-Low fuel costs
-Low maintenance costs
-On board power supply include
-Very quite system
-Good manoeuvrability
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