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A Shielding Method for Armature Reaction in Double Stator Field Modulated Superconducting Motor

A technology of armature reaction and superconducting motor, applied in the application field of superconducting technology, can solve problems affecting the safe operation of superconducting windings, superconducting winding current fluctuations, superconducting winding AC loss, etc., to reduce transmission loss and ensure load The effect of current flow ability and weakening current fluctuation

Active Publication Date: 2021-05-11
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The superconducting DC in the excitation winding superimposes the induced current, which will cause the fluctuation of the excitation current
In short, the armature reaction magnetic field in the magnetic field modulation type superconducting motor is an external alternating magnetic field relative to the superconducting winding, which will not only cause the AC loss of the superconducting winding, but also cause the current fluctuation in the superconducting winding
If no measures are taken to effectively shield the influence of the armature reaction magnetic field on the superconducting winding, it will affect the safe operation of the superconducting winding

Method used

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  • A Shielding Method for Armature Reaction in Double Stator Field Modulated Superconducting Motor
  • A Shielding Method for Armature Reaction in Double Stator Field Modulated Superconducting Motor
  • A Shielding Method for Armature Reaction in Double Stator Field Modulated Superconducting Motor

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Embodiment 1

[0042] A 10 kW magnetic field modulation superconducting motor is designed by adopting the technical solution in the summary of the invention to illustrate the specific implementation method of the invention.

[0043] Such as figure 1 As shown, the motor adopts a double-stator structure, and the outer stator 1, the rotor 2, and the inner stator 3 are arranged concentrically; the outer stator 1 includes the outer stator yoke 4, the outer stator teeth 5, and copper embedded in the outer stator slot Armature winding 6; the inner stator 3 includes an inner stator yoke 7, an inner stator tooth 8, and a superconducting magnet 9 nested on the inner stator tooth; the superconducting magnet 9 is mainly composed of a superconducting coil 10, a cryogenic constant temperature 11, and the copper shielding layer 12 that surrounds the superconducting coil, and a magnetic permeable ring 13 is installed on its outer side; The blocks are connected to form a whole; the number of the pole shoe-s...

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Abstract

The invention discloses a shielding method for an armature reaction in a double-stator field modulation superconducting motor, which adopts a double-stator structure, and an inner stator, a rotor and an outer stator are arranged concentrically. Copper wire armature windings are placed on the outer stator, and superconducting magnets wound by superconducting wires are placed on the inner stator, which mainly consists of superconducting coils and cryostats. Arrange the magnetic ring on the outside of the superconducting magnet, rationally design the number of teeth of the outer stator, the number of salient poles of the rotor and the magnetic ring, so that the armature reaction magnetic field can pass through the outer stator, the salient poles of the rotor and the magnetic ring as much as possible, so that It is as far away from the superconducting coil as possible. At the same time, a squirrel-cage damping shielding layer is arranged on the magnetic conducting ring to suppress the fundamental wave and low-order harmonics of the armature reaction, and a copper shielding layer is arranged inside the cryostat to surround the superconducting coil to suppress the high frequency of the armature reaction. subharmonic. The invention can effectively reduce the AC loss in the superconducting winding, and avoid the quenching caused by the excessive AC loss of the superconducting winding.

Description

technical field [0001] The invention relates to the application field of superconducting technology, in particular to a shielding method for armature reaction in a double-stator field-modulated superconducting motor. Background technique [0002] In order to solve the problems faced by superconducting motors such as complex dynamic sealing of coolant, low reliability of brush slip rings, and difficult design of torque tubes, a class of superconducting motors based on the principle of magnetic field modulation has received more and more attention, such as superconducting motors. Conductive switch flux linkage motors, superconducting guide motors, superconducting magnetic gear motors, double-stator superconducting field modulation motors, double-rotor superconducting guide motors, etc. But it is not difficult to find that this type of field modulation superconducting motor has similarities in structure, namely: armature winding and field winding (both can be wound by supercond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K55/00H02K16/04H02K3/42H02K3/18H02K11/02
CPCH02K3/18H02K3/42H02K11/02H02K16/04H02K55/00H02K2213/03
Inventor 程明朱新凯王玉彬
Owner SOUTHEAST UNIV
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