Abstract
Permanent magnetization of electric windlass and mooring winch (EWMW) has become a research trend in the development of new generation deck machinery. The paper investigates the development of a low-speed and high-efficiency permanent magnet synchronous motor (PMSM) and its drive system based on the load characteristics and special requirements of an EWMW. Firstly, the design specifications and key points of the motor drive system are analyzed. Secondly, a design method of parameter matching is proposed to design a 110 kW 75 r/min PMSM based on finite element method, field circuit coupling, and co-simulation. Finally, a prototype is developed and applied to a 45 T EWMW. The test results show that the PMSM can attain an efficiency of 94.3% at the rated operation, good traction characteristics with high torque at low speed, and 3 times wide flux-weakening region at constant power. Therefore, the matching design method is effective in the design of PMSM and drive system for EWMW.
Highlights
Windlass is an important navigation device for ships
Windlass and mooring winches (WMW) are combined into one device at the bow to realize the dual use of one machine in most ships
The high reliability, low noise and vibration, high efficiency, energy-saving, and intelligent integration of electric windlass and mooring winch (EWMW) are required with the development of the deck machinery
Summary
Windlass is an important navigation device for ships. Windlass and mooring winches (WMW) are combined into one device at the bow to realize the dual use of one machine in most ships. For low-speed PMSM, it is mainly used in wind power generation, ship electric propulsion, and coal mine direct drive system [16][18]. Literature [20]-[22] focused on how to improve the speed range and power density, whereas there are few studies on the design of PMSM in deck machinery EWMW considering special load characteristics. In this paper, according to the load characteristics and special requirements of the EWMW, the design difficulties and key points of the low-speed and high-efficiency permanent magnet motor and drive system are presented. The power drive system requires a compact structure, high efficiency, strong overload capacity, good low-frequency characteristics, zero speed hover, constant tension control, fast response. The design of the PMSM and drive system becomes more difficult
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