Ship propelling-type permanent-magnetic motor

Abstract

The invention relates to a permanent-magnetic motor, in particular to a ship propelling-type permanent-magnetic motor, which aims at solving the problems of the existing permanent-magnetic motor that the reliability in running is low, the capacity expansion is limited, the air-pore magnetic density is low, the power density is low, the structural strength is low, the temperature increasing is difficult for meeting the running requirement, and the oblique running working condition of a ship propelling system is difficult to satisfy. The ship propelling-type permanent-magnetic motor comprises a stand, a front end cover, a rear end cover, a stator structure, a rotor structure, a three-bearing structure and an air cooling structure; the rotor structure comprises a rotating shaft, an inner seal ring, a fan, a circular nut, a first rotor pressure ring, a rotor iron core, a second rotor pressure ring and a balance disc; the outer side surface of the first rotor pressure ring and the outer side surface of the second rotor pressure ring are respectively and uniformly provided with N outer teeth which are equally spaced along the circumferential direction; the outer ring of the end surface of the rotor iron core is circumferentially provided with N groups of magnetic steel grooves at intervals; each group of magnetic steel grooves consists of four magnetic steel grooves which are symmetrically distributed in a U shape. The ship propelling-type permanent-magnetic motor is applicable to a ship propelling system.

Description

technical field [0001] The invention relates to a permanent magnet motor, in particular to a ship propulsion vertical permanent magnet motor. Background technique [0002] Permanent magnet motors are widely used in ship propulsion systems because of their advantages such as simple structure, small size, light weight, low loss, and high efficiency. Practice has shown that the existing permanent magnet motors generally have the following problems due to their own structure limitations: First, the rotor pressure rings of the existing permanent magnet motors all adopt circular rotor pressure rings. The crimping area of ​​the circular rotor pressure ring is small. On the one hand, the tooth expansion of the rotor core is larger, which leads to the lower reliability of the motor. On the other hand, the permanent magnet section cannot be increased under the same volume ( That is, the magnetic steel groove cannot be increased), which leads to the limitation of the capacity expansio...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of low operational reliability, limited capacity expansion, low air-gap magnetic density, low power density, low structural strength, difficulty in meeting operating requirements in

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