Disk-type magneto generator of statorless iron core

Abstract

The invention discloses a disk-type magneto generator of a statorless iron core, which is suitable for wind driven generators or small hydroelectricity industry. The generator is composed of a rotor part and a stator part, wherein the rotor part is mainly composed of a case, upper permanent magnet steel, lower permanent magnet steel, a magnet steel fixing cover and an end cover; the stator part is mainly composed of a motor shaft, a bearing, a stator coil and a coil skeleton which is fixed on the motor shaft; the stator coil is embedded in the coil skeleton to omit the stator iron core with favourable conduction performance in the existing magneto generator; thus, when a generator field rotates, the stator part does not generate induced current and does not generate reluctance torque in the generator; expect mechanical friction torque, no starting reluctance torque exists in the generator, thus the invention is favourable for realizing gentle breeze power generation or small-flow power generation, does not generate iron loss in the generator, does not generate eddy current calorification, improves the generator efficiency, improves the service life, simplifies the structure, lowers the manufacturing cost, lowers the weight and is favourable for installing, storing, conveying and maintaining the generator.

Description

Technical field [0001] The invention relates to a generator, in particular to a disc-type permanent magnet generator without a stator iron core, which is especially suitable for the fields of wind power generation and small hydropower generation. Background technique [0002] In the field of existing wind power and small-scale hydropower generation, there are two kinds of generators, one is an electric excitation generator, and the other is a newly developed permanent magnet generator. In the electric excitation generator, the generator is equipped with an excitation coil. When the generator is running, an excitation current is added to the excitation coil from the outside to generate the main magnetic field of the generator, so that the generator generates electricity. Most of the generators are currently used in the market. Electrically excited generator. Since this kind of generator is equipped with an excitation coil, the structure and complexity of the system are incre...

AI Technical Summary

Problems solved by technology

But in the permanent magnet generator, due to the strong magnetic properties of the permanent magnet, when the generator magnetic field rotates relative to the stator core, an induced eddy current will be generated in the stator core of the generator, and the eddy current flows in the stator core and The reluctance torque is generated, which interacts with the main magnetic field of the permanent magnet of the rotor, and generates no-load resistance torque in the rotor, which brings braking torque to the starting operation of the generator, especially when the generator is just starting, The generator has not been connected to the load, and there is no generating electromagnetic torque in the generator. At this time, the torque in the generator is only the reluctance torque and mechanical friction torque, and the reluctance torque accounts for the starting torque of the permanent magnet generator. The proportion of the permanent magnet generator is relatively large, accounting for more than 90% of the total starting torque, so the starting torque of the permanent magnet generator is larger than that of the electric excitation generator, which makes it difficult for the permanent magnet generator to start at low wind speed or small water flow. The utilization of wind energy or water energy has affected the popularization and use of permanent magnet generators

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