直流无刷电机驱动的水下电缆绞车系统

Underwater winch system driven by Brush-Less DC motor

水下电缆绞车多采用液压驱动,但液压驱动存在无效动力转换,能源使用率不高,因此直流无刷电机驱动的水下电缆绞车具有实际意义。采用直流无刷电机驱动,不仅提高了水下电缆绞车系统的能源利用率,而且改善了系统的调速性能。与直流有刷电机相比,直流无刷电机可实现充油均压密封,更有利于在水下工作。介绍了直流无刷电机驱动水下电缆绞车的组成、功能及工作原理,针对研制的专用水下直流无刷电机,重点论述了其充油密封原理和工艺,并设计了一种全新的低成本高性能驱动控制电路。该水下电缆绞车系统已初步调试完毕,试验表明各项性能良好,即将投入实际应用。它具有结构简单,工作可靠,成本低的优点,因此在实际工程应用中具有推广意义。

Generally the underwater winch is driven by a hydratdic motor. However there is no efficient power conversion in this system. So it is useful to design the underwater winch driven by a Brush-Less DC motor. Driven by the Brush-Less DC motor, the underwater winch works efficiently and is easy to be controlled in speed. Compared with the Brush DC motor, the Brush-Less DC motor is fitter for operating under the water because it can be sealed by the way the oil is injected in it and there is the balance of press between the inside and outside of the Brush-Less DC motor under the water. This paper presents the composing function and operating principle of the underwater winch driven by the Brush-Less DC motor and describes the seal for the Brush-Less DC motor by use of oil. A novel, low-cost, high-performance control circuit has been designed for the Brush-Less DC motor. The system of the underwater winch has been tested successfully and will be used actually. It has significant advantages such as simplicity, reliability and economical development.