Permanent magnet propulsion system topology

Abstract

The invention discloses a permanent magnet propulsion system topology. The permanent magnet propulsion system topology is composed of a permanent magnet motor and a variable frequency driving device;the permanent magnet motor is a 2m-phase motor; the variable frequency driving device comprises a primary loop passage with the same constitution, each primary loop passage comprises two primary loopbranches with the same constitution, each primary loop branch is composed of an n-phase three-level bridge arm unit and an n-phase dv / dt filter unit, and an output end of each three-level bridge arm unit is connected with an input end of the corresponding dv / dt filter unit; each primary loop branch of the variable frequency driving device is connected with a corresponding n-phase winding group ofthe permanent magnet motor; electricity is supplied for all primary loop branches of the variable frequency driving device by a direct current power supplying power supply. Compared with a conventional three-phase permanent magnet propulsion system, the permanent magnet propulsion system topology has the advantages of high reliability, low torque ripple, low vibration noise, high input direct current voltage and the like, and the permanent magnet propulsion system topology is particularly suitable for large power electricity propulsion of a ship.

Description

technical field [0001] The invention belongs to the field of ship electric propulsion, and in particular relates to a topology of a permanent magnet propulsion system for ships. Background technique [0002] Ship propulsion methods include mechanical propulsion and electric propulsion. Mechanical propulsion is a propulsion method in which prime movers such as gas engines and diesel engines directly drive propellers through gearboxes and shafting. Electric propulsion is a propulsion method that combines the traditional independent mechanical propulsion system and electric power system in the form of electric energy, and comprehensively utilizes the ship power station to provide propulsion power, auxiliary equipment and daily power to the whole ship. Compared with the traditional mechanical propulsion method, the electric propulsion method mainly has the advantages of flexible layout, more effective use of space, flexible operation, good maneuverability, low life-cycle cost, ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of conventional three-phase permanent magnet motor propulsion system, such as low operating redundancy, large torque ripple, high vibration and noise, low-voltage multi-phase permanent magnet motor propulsion system, relatively low input voltage and limited output power level, etc. Insufficient, the present invention provides a permanent magnet propulsion system topology

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