Dual-stator superconductive exciting field modulating motor

Abstract

The invention discloses a dual-stator superconductive exciting field modulating motor comprising a first stator, a rotor, a second stator which are successively arranged from outside to inside or from left to right. A first air gap is formed between the first stator and the rotor. A second air gap is formed between the second stator and the rotor. The first stator comprises a stator yoke and an armature winding. The stator yoke is provided with a first side surface close to the rotor. The armature winding is arranged on the first side surface. The rotor comprises magnetic conductive iron core blocks and non magnetic conductive material blocks which are arranged at intervals. The second stator comprises a non magnetic conductive stator support and a high-temperature superconductive exciting winding fixed to the non magnetic conductive stator support. The dual-stator superconductive exciting field modulating motor is small in size, light in weight, high in efficiency, utilizes a characteristic that a high-temperature superconductive winding is suitable for DC, prevents liquid coolant rotary seal required by a conventional rotor excitation high-temperature superconductive motor, and is simple in structure. The stators of the motor are modular structures so as to be easy to transport and install. The motor has good application prospect in the field of offshore wind power.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a field modulation motor with superconducting excitation. Background technique [0002] With the rapid development of offshore wind power, ship electric propulsion, etc., higher and higher requirements are put forward for the technical indicators such as volume, weight, and efficiency of the motor system. Taking wind power generators as an example, with the development of wind power generation from land to sea, in order to improve power generation efficiency and reduce power generation costs per unit capacity, the capacity of a single unit is getting larger and larger. 5MW wind power generation units have been put into operation. Develop wind turbines with a capacity of 10MW or more. With the increase of the unit capacity, the weight and volume of the generating set become very large. For example, a 10MW ordinary permanent magnet direct drive wind turbine weighs up to 300 tons an...

AI Technical Summary

Problems solved by technology

[0004] However, in the synchronous motor with conventional structure, the excitation winding is located on the rotor, not only the excitation current needs to be introduced through the brushes and slip rings, but also the cooling liquid needs to be input through the rotary seal, which makes the structure of the motor complex, high in cost and low in reliability; The stator excitation type motor (such as flux switching permanent magnet motor) is a superconducting excitation flux switching motor based on the change. Its working principle determines that the motor must be composed of ferromagnetic materials to form a salient pole stator and rotor. The saturation magnetic density of materials limits the performance of superconducting materials

At the same time, the field winding and the armature winding are located in the same stator core, which makes the space arrangement difficult and limits the further improvement of the power density of the motor.

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