Excitation system of multi-superconducting-coil rotating pole shoe type high-temperature superconducting synchronous motor

Abstract

The invention discloses a multi-superconducting-coil rotating pole shoe type high-temperature superconducting synchronous motor excitation system in the technical field of superconducting motors, and the system comprises an inner stator iron core which is of a cylindrical structure with a hollow axis; the plurality of groups of Dewar systems with built-in superconducting coils are symmetrically sleeved on the outer wall of the inner stator iron core; the rotor cores can axially rotate along the inner stator core, the rotor cores are axially and symmetrically distributed on the peripheries of the inner stator core and the Dewar system, and a second air gap for the magnetic field to pass through exists between the rotor cores and the inner stator core. A magnetic circuit can be equally divided into multiple parts in the axial direction, the distance of an axial magnetic circuit of a single-loop magnetic field is reduced, the axial magnetic field distribution is more uniform, and therefore axial magnetic leakage is reduced; a rotor cantilever is prevented from being too long, so that the rotor structure is firmer; a multi-group coil structure can be further realized, the axial length limitation of the rotating pole shoe type superconducting motor is avoided, and the rotating pole shoe type superconducting motor has higher motor efficiency and power density and is more suitable for the high-speed and high-vibration field.

Description

technical field [0001] The invention relates to an excitation system of a multi-superconducting coil rotating pole piece high-temperature superconducting synchronous motor, belonging to the technical field of superconducting motors. Background technique [0002] Superconducting motor is a kind of high power density motor, which has important application scenarios in the fields of ship propulsion, wind power generation and aerospace. In recent years, the performance of superconducting materials has been continuously improved, and the price has gradually decreased, making the application technology of superconducting motors widely concerned. The rotating pole piece high-temperature superconducting motor, as disclosed in the patent (CN 109639103B), is a motor that utilizes superconducting coil excitation to form a rotating magnetic field by rotating the rotor core. Compared with conventional motors, the superconducting coils in this type of motor are in a static state, elimina...

AI Technical Summary

Problems solved by technology

The magnetic field distribution has both axial and radial distribution properties, and as the axial length of the motor increases, the magnetic flux conducted in the rotor core decreases, resulting in a decrease in the magnetic flux in the outer stator core, resulting in waste of the outer stator core

And the rotor core forms a cantilever structure, which affects the mechanical strength of the rotor core

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