Shaft generator for optimal propulsion with PTO/PTI

Generally speaking, the design of vessels with modern electric propulsion systems, either diesel electric, LNG electric or even fully electric, can be quite easily converted to a hybrid solution. In the best case, just by adding a parallel E-Storage system, a vessel can be operated utilizing battery power for example for peak power demand. In some cases, the optimum solution is to use DC power distribution instead of, or in conjunction with, traditional AC power distribution.

Inomax Drives’ solutions for the marine and offshore industry have the CCS certificates which gives you the best possible choice when selecting drives for your marine application.

Shaft generator for optimal propulsion with PTO/PTI

Many long-haul vessels are still operating with direct diesel propulsion and no electric propulsion system at all. These vessels can improve efficiency and optimize main engine load power and emissions by adding a shaft generator/motor between the propeller and the main engine. This solution, called Power Take Out and Power Take In (PTO/PTI), is an electrical add-on which makes these vessels more efficient and even ready for hybridization. In hybrid vessels, a shaft generator/motor with AC-drive technology allows the optimum control of propulsion machinery at various speeds, which saves energy.

Overview of Shaft Generator System

What is a shaft generator system?

The shaft generation system is a system that uses the ship's main engine drive shaft to drive the generator to generate electricity, which is used to provide electricity for the ship.

Working principle:
When the main engine is running, it is connected to the generator through the shaft, which converts the mechanical energy of the main engine into electrical energy to supply the ship's power needs.

System Composition

Main Generator:
Generator connected to the main shaft, converting mechanical energy into electrical energy.
Transmission System:
Includes shafts, gearboxes and couplings to transmit mechanical energy.
Control System:
Monitors and regulates the power generation process to ensure stable and safe power output.
Cooling System:
Maintains the temperature of the generator and transmission system to ensure its normal operation.
Auxiliary Equipment:
Includes transformers, rectifiers and protection devices to optimize and protect the power system.

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