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A permanent magnet linear synchronous motor non-uniformly mixed permanent magnet excitation topological structure

A permanent magnet linear synchronization and topology technology, applied in electrical components, electromechanical devices, electric components, etc., can solve the problems of reducing the maximum rated thrust of the motor, damage to the insulation of the motor, and reducing the performance of the motor, and reduce the harmonic content. Fluctuations in electromagnetic thrust, low machining accuracy, and improved sine effect

Pending Publication Date: 2017-09-01
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term operation may even cause damage to the motor insulation, reduction of the maximum rated thrust of the motor, and small overload capacity, etc.
[0006] 3. The permanent magnet is generally made of a whole piece of NdFeB permanent magnet material. When the temperature is too high, under the action of the armature reaction generated by the impact current, or under the severe mechanical vibration, irreversible demagnetization, or demagnetization, may occur. Reduce the performance of the motor, or even make it unusable

Method used

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  • A permanent magnet linear synchronous motor non-uniformly mixed permanent magnet excitation topological structure
  • A permanent magnet linear synchronous motor non-uniformly mixed permanent magnet excitation topological structure
  • A permanent magnet linear synchronous motor non-uniformly mixed permanent magnet excitation topological structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The motor mainly consists of primary, secondary and air gap.

[0028] Such as figure 1 As shown, the primary side of the bilateral cylindrical permanent magnet linear synchronous motor is divided into inner and outer double-layer structures, consisting of an inner stator and an outer stator.

[0029] The outer stator includes an outer primary core 5 and an outer armature winding 4 . The outer primary iron core 5 is located at the outermost side of the motor and is of tubular structure, and the outer layer armature winding 4 is tightly fixed inside the outer primary iron core 5 .

[0030] The inner stator includes an inner primary core 1 and an inner armature winding 2 . The inner primary iron core 1 is located at the innermost side of the motor and is also of tubular structure, and the inner armature winding 2 is tightly fixed outside the inner primary iron core 1 .

[0031] The inner armature winding 2 and the outer armature winding 4 are connected in series, and bo...

Embodiment 2

[0047] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is that the unilateral cylindrical permanent magnet linear synchronous motor only includes one layer of iron core and one layer of armature winding, and only the corresponding armature winding on the secondary yoke 3 A permanent magnet is arranged on one side.

[0048] The lower permanent magnet of each pole also adopts the non-uniform block structure described in Embodiment 1. Suppose the width of the two radially magnetized rare earth NdFeB permanent magnets 7-1 in the middle is the same, which is a 0 ; The width of the radially magnetized rare earth NdFeB permanent magnet 7-1 at both ends decreases successively according to the geometric sequence, respectively a 1 、a 2 ,...,a n ; The width of the radially filled ferrite permanent magnet 7-2 is a n+1 , n is a positive integer, and the pole pitch of the cylindrical permanent magnet linear motor is τ P , then a 0 =0.301τ P -0.065...

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Abstract

The invention provides a permanent magnet linear synchronous motor non-uniformly mixed permanent magnet excitation topological structure comprising a secondary magnet yoke provided with permanent magnets. Within one electrode distance, the permanent magnets are arranged in a way of alternating N poles with S poles. The permanent magnets of each pole adopt a non-uniform partitioning structure including at least one radial-magnetized rare earth NdFeB permanent magnet and a radial-magnetized ferrite permanent magnet arranged at both ends, and the adjacent radial-magnetized rare earth NdFeB permanent magnets are separated by magnetic isolation blocks. According to the invention, the air-gap flux density is adjusted through the dimensions of the permanent magnets so as to improve the air-gap flux density sine and further to reduce the induced electromotive harmonic content and fluctuation of an electromagnetic thrust. The irreversible demagnetizing of the permanent magnets is simulated through different working points of the neodymium iron boron materials and the ferrite materials to improve the anti-demagnetizing capability of the motor. Meanwhile, the utilization rate of the permanent magnets is raise; the cost is saved; and the structure is wide in application scope and has a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet linear motors, and relates to a permanent magnet linear synchronous motor non-uniform hybrid permanent magnet excitation topology, in particular to a permanent magnet linear synchronous motor with non-uniform distribution of neodymium-iron-boron permanent magnets and ferrite permanent magnets. Block mixed excitation topology. Background technique [0002] In recent years, due to the rapid development of modern precision manufacturing, microelectronics manufacturing and other industries, multiple requirements of "high acceleration, high speed and high precision" have been put forward for modern CNC machine tools. Using permanent magnet synchronous linear motor (PMLSM) to directly drive is one of the necessary ways to achieve high acceleration, high speed and high precision of CNC machine tools. The permanent magnet synchronous linear motor directly converts electric energy into linear mot...

Claims

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Application Information

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IPC IPC(8): H02K41/03
CPCH02K41/031H02K2213/03Y02T10/64
Inventor 郭亮师丹丹
Owner ZHEJIANG SCI-TECH UNIV
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