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A Constant Conduction Rotating Magnetic Field Electric Magnetic Levitation System

A rotating magnetic field, electric technology, applied in electrical components, holding devices with magnetic attraction or thrust, etc., can solve problems such as heavy structure, large mechanical vibration and mechanical noise, avoid mechanical loss, and control the suspension force conveniently and effectively. Effect

Inactive Publication Date: 2011-12-21
BEIJING JIAOTONG UNIV
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  • Description
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Problems solved by technology

[0005] Although this method realizes the inherently stable electric magnetic levitation under static conditions, if the magnetic field movement is required, a complex mechanical structure must be added to drive the permanent magnet to rotate to realize the movement of the magnetic field, which makes the whole structure heavy and brings huge mechanical vibration. and mechanical noise

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  • A Constant Conduction Rotating Magnetic Field Electric Magnetic Levitation System
  • A Constant Conduction Rotating Magnetic Field Electric Magnetic Levitation System
  • A Constant Conduction Rotating Magnetic Field Electric Magnetic Levitation System

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Embodiment Construction

[0019] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The rotating magnetic field electric magnetic levitation system needs to pass multi-phase symmetrical current in the primary winding to generate the rotating magnetic field. In practical applications, because the grid voltage is three-phase, the primary should adopt a symmetrical three-phase winding with three-phase symmetrical alternating current. It is also possible to use the current conversion technology to generate two-phase symmetrical alternating current and send it to the suspension system, and adopt a two-phase winding design in the primary.

[0021] figure 1 , figure 2 A structural diagram of a preferred embodiment of a rotating magnetic field electromagnetism levitation system is shown. The primary core is sl...

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Abstract

The invention provides a constant conduction rotating magnetic field electric magnetic levitation system, the system is mainly composed of two parts: a primary formed by a radially slotted annular iron core and a copper coil winding placed in the slot; a smooth flat aluminum or copper conductor plate secondary. Place the copper coil winding symmetrically along the circumferential direction of the iron core. The winding form can be the winding form of an ordinary asynchronous motor. An alternating current of a certain frequency is passed into the coil winding to generate a rotating magnetic field in the air gap, and the rotating magnetic field is in the secondary conductor. The induction generates eddy currents, and the polarity of this eddy current magnetic field is opposite to the rotating magnetic field generated by the primary current, and the two interact to generate levitation force. The system has a stable structure, simple control, no mechanical rotating mechanism, no mechanical vibration, noise and gyroscope effect, suitable for large air gap levitation occasions, and can realize inherently stable static and stable magnetic levitation.

Description

technical field [0001] The invention relates to an electric magnetic levitation system, in particular to an electric magnetic levitation system with a constant conduction rotating magnetic field. Background technique [0002] According to Lenz's theorem, both the moving magnetic field and the changing magnetic field can induce a current in the conductor, and the direction of the magnetic field generated by the induced current is opposite to that of the source moving magnetic field, and the interaction force between the two magnetic fields is expressed as a repulsive force. According to this principle, scholars from various countries have proposed a variety of schemes to realize magnetic levitation by using the repulsion generated by the eddy current electromagnetic field in the conductor, which is called electric magnetic levitation. [0003] One of the more representative ones is the Japanese MLU superconducting maglev transportation system. The vehicle-mounted superconduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N15/00
Inventor 范瑜朱熙李硕秦伟
Owner BEIJING JIAOTONG UNIV
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