Large-gap and low-noise engine-propeller integrated permanent magnet propulsion unit

Abstract

The invention discloses a large-gap and low-noise engine-propeller integrated permanent magnet propulsion unit, which comprises a base, a propulsion motor and a propeller, wherein the propulsion motor comprises a stator and a rotor, a large-gap is formed between the stator and the rotor; the rotor is connected with the base, the inner surface of the stator is provided with a groove, a stator winding is arranged in the groove; the rotor is of a solid structure, a permanent magnet is arranged on the surface of the rotor, the permanent magnet is placed by using a Halbach array; and the propellerand the motor are of an integrated structure, and the propeller is directly embedded inside the rotor. Through optimizing the motor structure and the propeller structure, the invention can be used for solving the problem of high noise of the underwater propulsion motor, can ensure that the mass of the motor is reduced, the moment of inertia is decreased, and has better dynamic response characteristic; meanwhile, the rotor is solid without a starting winding, thus the large-gap and low-noise engine-propeller integrated permanent magnet propulsion unit has simple structure and bigger starting moment; and the resistance of water flow flowing through the large-gap of the motor is smaller resistance due to the adoption of the large-gap of the motor. In addition, the motor has high power factorand efficiency in a full-power range.

Description

technical field [0001] The invention relates to an electric propulsion device, in particular to an underwater permanent magnet propulsion device integrating a motor and a propeller. Background technique [0002] With the emergence of pod-type electric propulsion, the application of propeller integration technology becomes possible. In 1989, two companies, KMY (Kvaerner Masa-Yards) and ABB, took the lead in proposing the idea of ​​pod-type electric propulsion. As an effective propulsion method, it was widely recognized soon. A year later, ABB.Azipod applied the pod-type electric propulsion system to a real ship for the first time, the channel maintenance ship Seili, and achieved very good results. Subsequently, major companies scrambled to be the first to develop their own podded propulsion systems. [0003] Driven by the rapid development of pod-type electric propulsion, another new type of electric propulsion device appeared at home and abroad in the early 1990s—the integ...

AI Technical Summary

Problems solved by technology

Domestically, due to the high technical content of the device, everything from the selection of motors and materials to the manufacturing process has been carefully designed. So far, domestic research in this area is still in the laboratory stage, and no official products have appeared yet.

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