Description

Injecting New Power into Old Ships: Low-Speed ​​Shaft-Mounted Permanent Magnet Synchronous Generator

The low-speed shaft-mounted permanent magnet synchronous generator is an innovative solution specifically designed for upgrading and retrofitting existing ship power systems. It is directly installed on the ship’s main shaft using a tensioning coupling, eliminating the need to modify the original transmission structure. This enables efficient power generation or electric propulsion, representing a crucial step towards hybrid propulsion for ships and improving energy efficiency and environmental performance.

Core Value and Main Applications:
A powerful tool for retrofitting old ships: Adding power generation/electric propulsion capabilities to traditional vessels with minimal engineering work.
Enabling Hybrid Propulsion Modes:
PTO: Power Take-Off from the main shaft, efficiently generating electricity to supply the ship’s power grid during navigation.
PTI: Power Take-In, utilizing grid or battery power to assist or drive the propeller.
PTH: Hybrid mode, intelligently switching between PTO and PTI to optimize energy efficiency across all operating conditions.
Dual function, one machine for two purposes: Can be used as both a generator and an electric motor, offering exceptional flexibility.
(Technical Advantages and Features)
1. High-efficiency permanent magnet technology, significant energy savings
Utilizing high-performance permanent magnets for excitation eliminates the excitation losses of traditional motors. Its efficiency, especially at low speeds, far surpasses that of electrically excited synchronous motors, resulting in higher power generation/driving efficiency and directly reducing fuel consumption or improving power utilization.

2. Shaft-mounted installation, convenient retrofitting
The unique tensioning coupling installation design allows for direct mounting onto the existing ship’s main shaft without cutting the main shaft or significantly modifying the gearbox and base. This greatly simplifies the installation process, shortens the retrofitting cycle, and reduces costs.

3. Robust and reliable, strong seaworthiness
Wide speed range matching: Specifically optimized for low-speed ship main shafts, matching a speed range of ~150 rpm.
High protection level: Provides IP54 to IP56 protection, effectively resisting seawater moisture, salt spray, and splashes.
Robust cooling system: Adopts IC71W external water cooling, ensuring efficient cooling and stable operation of the motor under high temperature and high load conditions.
High insulation class: Uses H/F or F/B insulation systems, providing a large temperature rise margin, long lifespan, and high reliability.

（Technical Parameters）

project	Parameters/Description
Frame size	H1120 ~ H1400
Power range	Up to approximately 4000 kVA
Speed ​​range	It can reach approximately 150 rpm.
Voltage range	220V ~ 13.8 kV （Customizable according to requirements.）
Protection level	IP54 / IP55 / IP56
Installation method	B3 （Horizontal base mounting）
Cooling method	IC71W （Case water cooling）
Insulation/Temperature Rise Rating	H/F； F/B

(Target Customers and Scenarios)
Shipowners who own older vessels and wish to implement energy-saving modifications and reduce operating costs.
Shipping companies planning to add shaft generator capabilities to their vessels to reduce auxiliary engine running time.
Shipyards and design companies committed to developing or upgrading to hybrid or electric propulsion vessels.
Users who need to implement PTO/PTI/PTH functions to improve vessel operational flexibility (e.g., tugboats, research vessels, special engineering vessels).

Make your fleet more efficient and environmentally friendly!

Get a customized solution: Our engineers can provide customized modification solutions based on your vessel type, main shaft parameters, and requirements.
Request detailed technical information: Click to download the complete product manual and technical white paper.
Contact us: Inquire now to get a quote or schedule a technical consultation.