Study On The Driving Device Of The Integrated Motor Propulsion

With the development of science and technology and the need of national defense, thequlity of the power equipment of the underwater vehicle demand more highly. The traditionalMarine power propulsion systems are all fission due to the large volume weight of the design,organization complex, so maintenance is convenient. The integrated motor propulsion is akind of equipment which integrated the motor body, controller and the propeller. It waswidely applied to various fields such as military and ocean probing. The main feature of theIMP is its compact volume and high propulsion efficiency. The researcher of the IMP is hotspot in many countries, and it has a wide application prospect. Currently, the research onintegrated motor propeller related to the electrical science and fluid science. In the area ofelectrical science, researches were major in the brushless DC motor’s control technologies. Inthe area of fluid science, researches were major in the propeller hydrodynamic performance.Most of the thesis just focused on one side of the mentioned aspects, and combined the twoparts together seldomly.The integrated motor propulsion worked under the water. The marine environment, suchas fluid’s velocity, fluid’s direction and the turbulent flow brought most of disturbance to themotors. Most of the integrated motor propulsion’s researches were constant with static load.Compared with the actual dynamic load, it was obviously have some errors. In this paper, itwas purpose to discuss the actual load situation, and had the following study.Firstly, on the basis of the hydromechanics theory, described the continuous equation andthe momentum equation of the incompressible fluid motion. Focus on the analysis for solvingthe problems of turbulence. established the mechanical model of the integrated motorpropulsion, analyzed the hydrodynamic performance, get the running motor’s dynamic loadparameters which included the force and the torque.Secondly, basis on the theory of the brushless DC motor and the PID regulator controlmethod, use the speed and the current dual closed-loop control method, build the DC motor’smodel on the Simulink platform. According to the comparison and analysis of the motor’soperation waveform which under different loads, got the integrated motor propulsion’s actualoperating results.Finally, design the hardware circuit. Use the DSP as the core of control circuit. Use the2SD106AI a driver of the driver circuit. The other hardware circuits include the positiondetecting circuit, the protection circuit, the A/D conversion circuit, and so on. Complete software design on the CCS software platform. Hardware and software co-debugging.Analysis the motor’s waveform. Verify the correctness of the design of the hardware circuit.The fluid calculated method used in this paper can correctly analysis the integratedmotor propulsion’s hydrodynamic performance. The simulation of the brushless DC motoralso show a good result. The results show that the dynamic load system research is morecloser to the actual system.