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Large-air gap resonant linear induction motor

A linear induction motor, resonant technology, applied in electrical components, electromechanical devices, circuit devices, etc., can solve the problems of application limitations and low efficiency of linear induction motors, and achieve the effects of large induced current, large thrust and high efficiency

Inactive Publication Date: 2016-06-15
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electromagnetic air gap (2 ~ 10mm) of the linear induction motor is about ten times that of the traditional rotary motor, so the efficiency of the linear induction motor is not high, and the application is limited

Method used

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specific Embodiment approach

[0020] Shown by accompanying drawing .1, the specific embodiment of the present invention is:

[0021] The primary three-phase symmetrical winding is wound on the primary iron core 1, and each phase winding is connected in series with the primary compensation capacitor 3 to make it work in a resonant state. The current of the primary winding 2 is provided by a three-phase high-frequency AC power supply or a power frequency inverter device. The primary winding 2 is wound by Litz wire, which can reduce the skin effect under high-frequency AC state. The structure and material of the secondary winding 4 are the same as those of the primary winding 2. It adopts a star or delta connection and is connected in series with the secondary compensation capacitor 5. Its resonant frequency is the same as that of the primary winding 2. At this time, the primary winding 2 and the secondary The primary winding 4 achieves strong magnetic coupling resonance under a large air gap, and the seconda...

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Abstract

The invention discloses a large-gap resonant linear induction motor, which utilizes the resonant coupling of the primary winding and the secondary winding to realize the maximization of the secondary induction current. The system consists of three-phase symmetrical primary windings (2) wound on the stator core (1) connected in series with primary compensation capacitors (3), fed with three-phase symmetrical high-frequency alternating current, and generating a traveling wave magnetic field at the air gap. The structure of the secondary winding (4) is the same as that of the primary winding (2). It adopts a star or delta connection and is connected in series with the secondary compensation capacitor (5), so that it is in a state of magnetic coupling resonance with the primary, and its resonant frequency is the same as that of the primary winding. (2) have the same resonant frequency, so that the primary winding (2) and the secondary winding (4) achieve magnetic coupling resonance. The invention is applied to linear motors and the like. Due to the large current generated by resonance coupling, the motor has the advantages of large thrust, large air gap, high efficiency and the like.

Description

technical field [0001] The invention proposes a large-gap resonant linear induction motor, which is mainly used in the field of high-speed or ultra-high-speed linear acceleration. Background technique [0002] The linear induction motor can be seen as a tiling evolution of the primary and secondary unfolding of the rotary induction motor. The three-phase symmetrical sinusoidal current is passed into the primary three-phase winding, and a traveling wave magnetic field is generated at the air gap. The secondary conductor cuts the traveling wave magnetic field, induces an electromotive force and generates a current, and the current interacts with the air gap magnetic field to generate electromagnetic thrust. The conductor moves linearly along the direction of the traveling wave magnetic field under the action of thrust, and the linear induction motor has the advantages of simple structure and convenient control. However, the electromagnetic air gap (2-10mm) of the linear induc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02K3/28H02K41/02
CPCH02K3/28H02K41/02
Inventor 马光同王志涛杨晨周鹏博李兴田张涵龚天勇
Owner SOUTHWEST JIAOTONG UNIV
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