Permanent magnet vernier linear motor for urban rail transits

A technology of urban rail transit and linear motors, which is applied in the fields of motors, rail transit, and electrical engineering. It can solve the problems of low-speed motion stability, large thrust fluctuation amplitude, affecting positioning and trajectory tracking accuracy, etc., and achieves large thrust transmission capacity and small size. Yoke size, material saving effect

Inactive Publication Date: 2012-07-18
SOUTHEAST UNIV
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Problems solved by technology

However, it also has the obvious disadvantage of large thrust fluctuation amplitude, which directly affects the positioning an

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  • Permanent magnet vernier linear motor for urban rail transits
  • Permanent magnet vernier linear motor for urban rail transits
  • Permanent magnet vernier linear motor for urban rail transits

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[0026] The present invention will be described below with reference to the drawings.

[0027] The invention proposes a low-speed large-thrust permanent magnet vernier linear motor for urban rail transit. It uses the magnetic flux modulation pole on the primary teeth of the motor to modulate the magnetic field to solve the problem of low thrust output of the traditional linear motor at low speed. At the same time, the secondary permanent magnet adopts a special Halbach array to provide greater effective magnetic field resonance. The wave component and output thrust density reduce the magnetic flux density of the secondary iron core yoke and reduce the iron core loss. Therefore, the present invention not only improves the low-speed running stability of the linear motor for urban rail transit, but also improves the motor efficiency.

[0028] The motor includes a primary and a secondary; the primary of the motor includes a primary iron core, primary teeth, armature windings, and magne...

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Abstract

The invention relates to a permanent magnet vernier linear motor for urban rail transits, which comprises a motor primary (1), and a motor secondary (2) separated from the motor primary (1) through an air gap; the motor primary (1) comprises a flat primary iron core (3), an armature winding (5), flux modulation poles (6), wherein primary teeth (4) protruding out of the periphery of the primary iron core are arranged on the primary iron core (3), the armature winding (5) is wound on the primary teeth (4), and protruding small tooth portions on the primary teeth (4)are flux modulation poles (6), the motor primary (1) is mounted on a train; the motor secondary (2) comprises permanent magnets (7) and a secondary iron core (8), wherein permanent magnets (7) are embedded in the secondary iron core (8) along a horizontal direction in gaps with a same distance, and the motor secondary (2) is arranged on the train rail. The motor can improve the stability of the linear motor for urban rail transits during low velocity operation, the motor efficiency is improved, and high theoretical and practical values are provided.

Description

technical field [0001] The invention relates to the fields of electrician, motor and rail transit, in particular to a novel Halbach low-speed and high-thrust permanent magnet vernier linear motor suitable for urban rail transit. Background technique [0002] With the expansion of urban population and the continuous density of urban buildings, urban rail transit plays a very important role in the sustainable development of cities by virtue of its advantages of convenience, environmental protection, energy saving, safety and large transportation capacity. At the same time, the research on traction motors for urban rail transit has also received more and more attention from scholars in related fields. [0003] In urban rail transit applications, traction motors mainly use two technical approaches: rotary motors and linear motors. Urban rail trams using linear motors directly convert electrical energy into mechanical energy for linear motion without any transmission device for...

Claims

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Application Information

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IPC IPC(8): H02K41/02
Inventor 樊英黄进金小香於锋
Owner SOUTHEAST UNIV
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