Double-stator superconducting brushless doubly-fed wind turbine

Abstract

The invention relates to a dual-stator superconducting brushless doubly-fed wind generator. The motor has an outer stator (1), a rotor (4) and an inner stator (7), and the outer stator (1) needs to adopt a structure adopting segmented assembling. Individual Dewar magnets (11) surround outer stator yokes (2) of the outer stator (2), and form a full-pitch distributed control winding after external connection. Each individual Dewar magnet (11) consists of an outer layer Dewar and an inner layer Dewar (13), and a superconducting coil (14) is placed inside the inner layer Dewar (13). A short-pitchdistributed power winding (9) is placed on the inner stator (7), and can be made of copper wires of superconducting wires. To achieve excellent performance of the doubly-fed motor, the control windingand the power winding must adopt a distributed winding form. The pole pair number psc of the superconducting control winding, the pole pair number pcw of the power winding and the number nr of rotormagnetic conductive iron core blocks (6) must satisfy a relation nr=psc+pcw. The number of rotor non-magnetic conductive blocks (5) and that of the rotor magnetic conductive iron core blocks (6) are equal.

Description

technical field [0001] The invention relates to a brushless doubly-fed wind power generator technology with a double-stator structure and superconducting materials applied, and belongs to the technical field of motors. Background technique [0002] Ensuring the security of energy supply is the basis for ensuring the healthy and rapid development of the national economy. In order to deal with practical problems such as the fossil energy crisis and environmental pollution, the state has issued a series of relevant policies to vigorously promote the development of clean energy such as wind energy, solar energy, water energy, and advanced nuclear energy. Among them, wind energy is one of the fastest growing new energy sources. In "Made in China 2025-Energy Equipment Implementation Plan", the main tasks and implementation plan of wind power equipment are described in detail: the development of large-scale onshore wind turbines suitable for hub center heights of 100-200 meters, an...

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Problems solved by technology

[0006] Technical problem: In order to avoid many problems such as complex installation and low reliability of the cooling system of dynamic rotary seal, a double-stator superconducting brushless double-fed wind motor proposed by the present invention realizes the static sealing of the superconducting magnet cooling system At the same time, the system loss is reduced, and the power density and efficiency of the motor are improved. According to the working principle of the variable speed constant frequency double-fed motor, a part of the power converter is used to control the motor to realize the variable speed constant frequency power generation function, which further reduces the cost of the power generation system.

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