Recently, four permanent magnet synchronous direct drive motors designed and manufactured by CLC for Nanjing High Precision Marine Equipment Co., LTD. 1MW cable laying pod propeller project have successively passed the test acceptance, classification society certification and delivery. The passing of the project marks a new level of SEC design and manufacturing level in Marine motors.。
The advanced Marine podded electric propulsion system is a propulsion motor directly connected with the propulsion propeller to form an independent propulsion module, and is suspended at the bottom of the hull. The propulsion module can rotate 360° horizontally, and the propulsion azimuths can be manually controlled and adjusted, thus eliminating the steering gear system and the corresponding control mechanism, greatly simplifying the control system. The advent of pod propulsion is a revolution in the way ships are propelled, which can be widely used in passenger ships (cruise or ferry), large container ships, drilling platforms, offshore engineering support vessels, passenger rolling vessels, yachts, scientific research vessels, salvage vessels and LNG vessels.
The pod electric propulsion system has the following advantages over the traditional Marine propulsion system：
1、High propulsion efficiency.
2、The stern shaft, stern thruster, steering gear system, etc. are eliminated, and special cooling systems are not required, thus saving cabin capacity and simplifying installation.
3、The space configuration is flexible, which can be arranged in the whole space of the engine room, which is convenient and flexible, and makes full use of the cabin capacity, providing great flexibility for the design of the hull, especially the design of the stern and the control room. From the perspective of fire protection and safety, the generators can also be divided into several groups (such as the whole ship has 6 generators, can be divided into 3 sets of 1 group) arranged in different cabins.
4、The modular design principle allows the propulsion modules to be installed before the ship is substantially built and ready for sea trials and, if necessary, can be installed and disassembled at sea.
5、Low noise, low vibration, reduced exhaust emissions.
6、Minimum emergency stopping time.
7、The propeller can be rotated in a 360° horizontal range, greatly improving the ship''''s maneuverability and maneuverability。
8、According to the need to decide the number of generators to be incorporated into the grid, so that each unit can work under the ideal load, which is not only good for the good combustion of the diesel engine and the use of heavy oil, but also to reduce maintenance work and reduce spare parts costs.
In the process of project implementation, the company is not only responsible for the electromagnetic, structure and insulation design of the PMSM body, but also responsible for the assembly process, tooling design, manufacturing and testing. The success of the project is another effort by SEC after it provided a permanent magnet synchronous direct drive motor TPYC4400-24, 4400KW, 230rpm, 690v for the 5MW class pod propeller project of Nanjing High Precision Marine Equipment Co., LTD in 2019, which not only laid the brand advantage, but also won wide praise from customers.
