Research On Active Lift And Sink Compensated Regenerative Braking Control Method For Switched Reluctance Motor Driven Marine Winches

Marine winch is an important equipment for marine scientific research and marine resources exploration and development,and the active lifting and sinking compensation is the key function to ensure that the marine winch maintains the normal operation at sea when it makes violent lifting and sinking movement with the mother ship.In the active lifting and sinking compensation control of the offshore winch,in order to achieve synchronous operation with the mother ship’s lifting and sinking motion,its drive switched reluctance motor will be in frequent starting and braking,acceleration and deceleration and reciprocating operation,due to frequent braking operation and will generate a large amount of energy loss,so it is important to carry out research on regenerative braking control of switched reluctance motor.The paper firstly proposes an improved optimization algorithm to address the shortcomings of the existing optimization methods in optimizing the regenerative braking control parameters of the switched reluctance motor,and then conducts a research on the high efficiency of the regenerative braking method based on the improved optimization algorithm for the switched reluctance motor in maintaining accurate tracking of the lifting and sinking motion of the mother ship.1.Briefly introduced the development overview and shortcomings of the marine winch power transmission system,explained the basic characteristics of the switched reluctance motor and its regenerative braking control method,proposed an effective method to achieve efficient regenerative braking of the switched reluctance motor in the active lifting and sinking compensation control of the marine winch,and explained the main content and chapter arrangement of the thesis.2.The basic structure and working principle of switched reluctance motor control system are explained,the mathematical model of switched reluctance motor control system is established,and the common control methods of switched reluctance motor are briefly introduced.3.In view of the shortcomings in optimizing the regenerative braking control parameters of the switched reluctance motor using the traditional bi-objective non-dominated ranking genetic algorithm,a progressive constrained dominance law is proposed.The basic principle of this law is explained,and the specific design method of the biorthogonal non-dominated ranking genetic algorithm based on this law is studied for optimizing the regenerative braking control parameters of switched reluctance motors,and its effect is verified by simulation.4.For the active lifting and sinking compensation control of marine winches,the switched reluctance motor needs to maintain accurate tracking of the time-varying given speed corresponding to the lifting and sinking motion of the mother ship during the braking operation,and proposes an advanced approach for efficient regenerative braking control of the switched reluctance motor under variable speed tracking,and describes the basic principle and specific design method of the method,and verifies its effect by simulation.5.Based on the above-mentioned research on the efficient renewable braking control approach for switched reluctance motors under variable speed tracking,further research on the efficient renewable binding control approach for switched reluctance motors under variable speed and variable acceleration mode is carried out,and the fundamental theory and specific design method of the proposed control approach are described,and the effect is compared and simulated.