Low-thrust-fluctuation continuous pole permanent magnet synchronous linear motor

A permanent magnet synchronous linear, low-thrust technology, applied in electrical components, electromechanical devices, propulsion systems, etc., can solve the problems of continuous pole permanent magnet synchronous linear motor thrust fluctuations, etc., to suppress even harmonics, reduce volume and mass , the effect of reducing costs

Inactive Publication Date: 2017-09-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of large thrust fluctuation of the existing continuous pole permanent magnet synchronous linear motor, the present invention proposes a low thrust fluctuation continuous pole permanent magnet synchronous linear motor

Method used

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  • Low-thrust-fluctuation continuous pole permanent magnet synchronous linear motor
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  • Low-thrust-fluctuation continuous pole permanent magnet synchronous linear motor

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Experimental program
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Embodiment approach 1

[0020] Such as figure 1 , 2 , 3, and 4, this embodiment is a unilateral flat-plate type low-thrust fluctuation continuous pole permanent magnet synchronous linear motor, and its pole slots are matched to a 10-pole 12-slot structure, which is composed of two 5-pole 6-slot unit motors, including a Primary assembly, one secondary assembly and air gap. The primary assembly consists of the primary core 1 and the armature winding 2. The primary iron core is slotted to form a primary yoke 1-1, a primary tooth 1-2 and a magnetic modulation structure 1-3. The magnetic modulation structure 1-3 is located between the unit motor 1 and the unit motor 2, and is integrated with the primary iron core 1-1. The width of the magnetic modulation structure is τ (τ is the pole pitch). The winding directions of the A-phase winding 2-1-1 on the unit motor 1 and the unit motor 2 2-1-2 are opposite. Similarly, the winding directions of the B-phase windings 2-2-1 and 2-2-2 and the C-phase winding 2...

Embodiment approach 2

[0023] Such as Figure 5 As shown, the difference between the present embodiment and the first embodiment is that the magnetic modulation structure 1-3 adopts a slotted structure to form a magnetic modulation groove 1-3-1 and a magnetic modulation tooth 1-3-2, and a magnetically conductive material is used. Form an integral structure with the primary core 1, the value range of the width s of the magnetic adjustment slot 1-3-1 is 0≤S≤τ, and the value range of the height h of the magnetic adjustment tooth 1-3-2 is: 0≤h≤ H, H is the height of primary teeth 1-2. Through the flexible optimal design of the height and width of the magnetic field slot 1-3-1 and the magnetic field tooth 1-3-2, the optimal design of the magnetic field can be further realized, and the three-phase winding caused by the end effect of the linear motor can be improved. Symmetry is further conducive to reducing thrust fluctuations and increasing average thrust.

Embodiment approach 3

[0025] Such as Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that the low-thrust fluctuation continuous pole permanent magnet synchronous linear motor adopts a multi-unit motor structure design, n (n≥2) unit motors form a module, and the magnetic modulation structure 1-3 Set between two modules. The winding directions of the windings of different modules are opposite. For the multi-pole and multi-slot high-thrust linear motor structure, this structure can achieve the effect of suppressing even-order harmonics with only a small number of magnetic modulation blocks, thereby reducing the length of the primary and increasing the thrust density of the motor.

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Abstract

The invention provides a low-thrust-fluctuation continuous pole permanent magnet synchronous linear motor, which belongs to the technical field of motors. The low-thrust-fluctuation continuous pole permanent magnet synchronous linear motor comprises a primary assembly and a secondary assembly, wherein the primary assembly is composed of an armature winding and a primary iron core, a groove is formed in the primary iron core, the armature winding is arranged in the groove, phase positions of unit motors are staggered by 180 degrees by means of the structural design of the primary iron core, and winding directions of in-phase windings on the adjacent unit motors are opposite; and the secondary assembly is composed of permanent magnets and a secondary iron core, magnetizing directions of the permanent magnets are the same, and the secondary iron core is composed of secondary teeth and secondary back yokes between the permanent magnets.

Description

technical field [0001] The invention belongs to the field of motors, in particular to a continuous pole permanent magnet synchronous linear motor with low thrust fluctuation. Background technique [0002] The continuous pole magnetic pole structure uses unipolar permanent magnets and intermediate iron poles to form an air gap magnetic field. Compared with the traditional NS magnetic pole structure, the amount of permanent magnets can be halved. When the new magnetic pole is applied to the flat permanent magnet synchronous linear motor, the unilateral magnetic pulling force is greatly reduced, which is beneficial to reduce the thickness of the secondary yoke plate and the primary structural support. Since the amount of permanent magnets can be reduced by half compared with the traditional NS magnetic pole structure, it can significantly reduce the cost of the motor when applied to long secondary and short primary permanent magnet synchronous linear motors. However, there are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K41/03
CPCH02K41/031
Inventor 黄旭珍李静钱振宇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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