Full-superconducting super-efficient energy-saving motor

Abstract

The invention relates to the technical field of motors, and discloses a full-superconducting ultra-efficient energy-saving motor, which comprises a vacuum Dewar, a rotor main body and a stator, the vacuum Dewar comprises a middle area and an outer layer area formed around the middle area, the rotor is positioned in the middle area, a power output shaft at the end part of the rotor main body is rotationally connected with the vacuum Dewar through a bearing, and the rotor main body is positioned in the outer layer area. The outer layer area is a sealed space, the sealed space is filled with liquid nitrogen, the stator is located in the outer layer area, the stator comprises a supporting body and a winding arranged on the supporting body, the supporting body is made of a low-temperature-resistant nylon material, and the winding is made of an ultra-thin filament niobium-titanium composite superconducting material; according to the full-superconducting super-efficient energy-saving motor provided by the invention, the problem of low operation efficiency of an existing motor is solved.

Description

Technical field [0001] The present invention relates to the field of motor technology, specifically to a fully superconducting super-efficient energy-saving motor. Background [0002] The motors commonly used by enterprises are divided into: AC three-phase asynchronous motors, AC three-phase variable frequency induction motors, DC synchronous motors, permanent magnet synchronous motors and servo motors. [0003] 1. The current AC three-phase asynchronous motor is an induction motor and an AC three-phase frequency conversion asynchronous motor, and its operating principle: When the three-phase stator winding of the motor (each with a difference of 120 degrees of electrical angle), after entering the three symmetrical alternating current, a rotating magnetic field will be generated, and the rotating magnetic field will cut the rotor winding, thereby generating an inductive current in the rotor winding (the rotor winding is a closed path), and the rotor conductor carrying the curren...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of AC three-phase asynchronous motor and AC three-phase variable frequency asynchronous motor is asynchronous (the speed of the rotating magnetic field of the stator is not synchronous with the speed of the rotor) motor, so the rotor must have an induced excitation current to rotate, and there is a slip. In this way, the efficiency of this type of motor will not be high, and the power saving rate will be extremely poor.

[0005] 2. The structure of the current DC motor is complex, which limits the reduction of volume and weight, especially the sliding contact between the brush and the commutator causes mechanical friction and sparks, resulting in high failure rates, low reliability and long life of the DC motor. Short, maintenance workload is heavy, and DC power supply is used, the commutation spark not only causes the electric corrosion of the commutator, but also is a source of radio interference, which will bring harmful interference effects to the surrounding electrical equipment

Therefore, the brushes and commutators of DC motors limit the development of DC motors to high speed and large capacity, and the efficiency of DC motors is very low, and the power saving rate is extremely poor.

[0006] 3. Permanent magnet synchronous motors and servo motors are better than AC asynchronous motors, AC variable frequency asynchronous motors, and DC synchronous motors in terms of performance and operating efficiency. The disadvantage is that the temperature of permanent magnets in the rotors of permanent magnet synchronous motors and servo motors rises once the motor is running. High, mechanical vibration and the impact of power supply surge current are prone to irreversible demagnetization, that is, the motor will be scrapped immediately, and the magnetic field strength of the rotor permanent magnet of the permanent magnet motor will decay with the passage of time, that is, The actual output power of this motor will become smaller, and these two motors cannot be made large, and this type of motor is particularly delicate, and the rotor permanent magnet of this type of motor uses rare earth (rare earth has become a national strategic resource), which limits this type of motor. The development and large-area application of similar motors, and their operating efficiency is not ideal

However, traditional superconducting motors mostly use superconducting coils or superconducting blocks in the rotor structure to play the role of permanent magnets. Centrifugal force causes the critical current of the superconducting material to drop, which affects the performance of the superconducting motor. In addition, the rotor cooling system needs to adopt a dynamic seal structure, which further complicates the structure of the motor and limits the high-speed operation of the rotor.

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