Design And Research For The Electric Propulsion Of Small Ship

With the development of power electronic technology and frequency conversion motor, the electric propulsion technology increasingly prominent superiority and application scope is expanding. At present electric propulsion technology application in our country is not widely used, and the new product and ship. While western countries in electric propulsion manufactures have their own electric propulsion products production and operation.Nowadays, more and more small ship adopts electric propulsion, its core is to promote its drive motor control. This paper selects the "Fazhen" work ship as the research object, the thorough research to the speed control, and its main electric propulsion system configuration.This paper firstly analyzes the current domestic and international ship electric propulsion technology application status and development of research objects. Secondly, the comparative analysis different types of motor, permanent magnet synchronous motor and its model. Again, freqency conversion, compare delivered into the theory of variable frenquency speed regulation system and pay straight into the variable frequency speed regulation system, selection of design of frequency converter. Then compare different types of thusters, select the prototpye of common, and the basic parameters determined the propeller. Finally, according to the theory of permanent magnet synchronous motor vector control strategy and direct torque control strategy is simulated and analyzed.Through frenquency conversion motor theory, theory and analysis of the characteristics of propulsion motor, variable frequency speed regulation system and the configuration and selection of propeller design for small vessels, main electric propulsion system design and laid the foundation for the further study.