Abstract
The permanent magnet brushless DC propulsion motor is highly efficient and energy-saving and can be widely used in the electric propulsion system of ships. Therefore, taking the marine seven-phase permanent magnet brushless DC propulsion motor as the main research object, the basic structure of the motor is analyzed, the states of the seven-phase conduction, six-phase conduction, and five-phase conduction modes are listed, and mathematical models of the three different conduction modes are studied. Finally, the current fluctuation of the six-phase conduction mode is smaller through simulation. The speed is more stable, and the advantages are greater, which provides a reference for the application of a seven-phase permanent magnet brushless DC propulsion motor in marine power.
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