Permanent magnet linear generator

Abstract

The invention relates to a permanent magnet linear generator, and particularly is suitable for a direct-drive wave energy generating system and a hybrid vehicle generating system. The generator comprises a stator and two rotors, wherein the stator comprises permanent magnets and a rotor yoke; the top surface and the lower surface of the rotor yoke are adhered to the permanent magnets; each rotor comprises a rotor iron core and a coil; the coil is embedded into the slot of the rotor iron core; and the two rotors are symmetrically arranged on the upper side face and the lower side face of the stator respectively. According to the generator, the number of the bearings of the two motors is halved, bearing force is zero, an air gap is adjusted concisely and conveniently, and friction loss is small; and particularly, according to the technical scheme of the generator with a symmetrical structure, a symmetrical structure with four motors or six motors can be formed, thus a permanent magneticlinear generator with higher motor efficiency can be obtained.

Description

technical field [0001] The invention relates to a permanent magnet linear generator, which is especially suitable for a direct-drive wave energy power generation system and a hybrid electric vehicle power generation system. Background technique [0002] With the continuous expansion of the application range of linear generators, the structural types of conventional linear generators must be continuously developed and innovated to meet the needs of different application fields. Generally, the permanent magnet linear generator adopts a unilateral motor structure, and the unilateral magnetic pull of the mover and stator is large. Especially in the direct-drive wave energy generation system, due to the low linear speed, the motor's The size is large, and the unilateral magnetic pull is large. The use of the traditional structure will cause the bearing to be stressed, wear quickly, often need maintenance, and the power density is also small; this conventional overall structure ha...

AI Technical Summary

Problems solved by technology

Generally, the permanent magnet linear generator adopts a unilateral motor structure, and the unilateral magnetic pull of the mover and stator is large. Especially in the direct-drive wave energy generation system, due to the low linear speed, the motor's The size is large, and the unilateral magnetic pull is large. The use of the traditional structure will cause the bearing to be stressed, wear quickly, often need maintenance, and the power density is also small; this conventional overall structure has a single installation method for the mover and stator, and the mover and The adjustment of the air gap between the stators is not flexible enough, these problems need to be solved in the structural design

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