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Cylindrical permanent magnet linear synchronous motor (PMLSM) with parallel magnetic circuits

A permanent magnet linear synchronous, cylindrical technology, used in electrical components, electromechanical devices, electric components, etc., can solve the problems of motor pole pitch and tooth pitch width conflict, poor heat dissipation effect, complex structure, etc., to eliminate the mutual inductance between phases , good heat dissipation effect, low temperature rise effect

Inactive Publication Date: 2009-11-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex structure, poor heat dissipation effect, high temperature, and conflict between motor pole pitch and tooth pitch width in the existing longitudinal flux permanent magnet linear synchronous motor, the present invention proposes a parallel magnetic circuit cylindrical type Permanent magnet linear synchronous motor

Method used

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  • Cylindrical permanent magnet linear synchronous motor (PMLSM) with parallel magnetic circuits
  • Cylindrical permanent magnet linear synchronous motor (PMLSM) with parallel magnetic circuits
  • Cylindrical permanent magnet linear synchronous motor (PMLSM) with parallel magnetic circuits

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, this embodiment includes the primary, secondary and air gap; the secondary includes the permanent magnet array 5 and the shaft cylinder 6; the permanent magnet array 5 is fixedly arranged on the shaft cylinder 6; the primary includes the phase armature unit 1 and the casing 2; the phase armature unit 1 is arranged in the casing 2 in sequence along the axial direction; the phase armature unit 1 includes a phase armature core unit 3 and a phase armature winding unit 4; it is characterized in that each phase armature core unit 3 includes i+1 annular iron cores 31 and i iron core segment spacer rings 32, wherein i is a positive integer; the i+1 annular iron cores 31 and i iron core segment spacer rings 32 are arranged at intervals along the axial direction ; The sum of the axial thicknesses of an annular iron core 31 and an iron core section spacer ring 32 is equal to 2τ p , where ...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination image 3 Describe this embodiment, the difference between this embodiment and the specific embodiment is that 2n non-magnetic spacers 7 are added in the secondary, and the permanent magnet array 5 includes m sector-shaped permanent magnets 52 and m-1 tile-shaped permanent magnets 51 , sector-shaped permanent magnets 52 are axially magnetized, tile-shaped permanent magnets 51 are radially magnetized, m sector-shaped permanent magnets 52 and m-1 tile-shaped permanent magnets 51 are arranged alternately along the axial direction to form a row of permanent magnet strips , 2n columns of permanent magnet strips and 2n non-magnetic spacer strips 7 are arranged alternately along the circumferential direction, and the magnetization directions of the two adjacent sector permanent magnets 52 in the axial or circumferential direction are opposite; The magnetization directions of the two tile-shaped permanent magnets 51 are opposite; the...

specific Embodiment approach 3

[0009] Specific implementation mode three: combination Figure 4 Describe this embodiment, the difference between this embodiment and the specific embodiment is that 2n non-magnetic spacers 7 are added in the secondary, and the permanent magnet array 5 includes m sector-shaped permanent magnets 52 and m-1 tile-shaped magnetic conduction Yoke 53, sector-shaped permanent magnets 52 are axially magnetized, m sector-shaped permanent magnets 52 and m-1 tile-shaped magnetic conducting yokes 53 are arranged alternately in the axial direction to form a row of permanent magnet strips, 2n columns of permanent magnet strips and 2n strips The non-magnetic spacer bars 7 are arranged alternately along the circumferential direction, and the magnetization directions of the two adjacent sectoral permanent magnets 52 in the axial or circumferential direction are opposite. Other compositions and connection methods are the same as those in Embodiment 1.

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Abstract

The invention discloses a cylindrical permanent magnet linear synchronous motor (PMLSM) with parallel magnetic circuits, relating to the field of motor. The invention solves the problems of complicated structure, poor radiating effect, high temperature rise, and conflict of motor polar distance and teeth space width of the existing longitudinal magnetic flux PMLSM. Each phase armature core unit comprises i+1 circular-ring cores and i spacer rings of core stacks, and the circular-ring cores and the spacer rings of core stacks are respectively arrayed with interval along axialdirection; the axial thickness sum of one circular-ring core and one spacer ring of the core stack equals to 2taup, distance Lt between the central lines of two adjacent phase armatures along axial direction, and the permanent magnet polar distance taup of the permanent magnet array along axial direction satisfy the relationship: Lt= ktaup+ / -(1 / m)taup; each phase armature core unit is provided with 2n tooth spaces, the loop of the phase armature winding unit winds on the tooth of the phase armature core unit, the loops on the adjacent teeth have reverse winding direction, all the loops on the teeth are connected in series to form a phase armature winding unit, and phase unit armature windings with the same phase are connected in series or connected in parallel to form a phase armature winding. The invention is used as a motor or a generator.

Description

technical field [0001] The invention specifically relates to a permanent magnet linear synchronous motor. Background technique [0002] The structure of the existing longitudinal flux cylindrical permanent magnet linear synchronous motor is as follows: Figure 7 shown. When the armature core is made of silicon steel sheets, since the direction of the laminations is axial, the direction of the armature magnetic field generated by the permanent magnet and the winding is partly in the same direction as the laminations, forming a large eddy current in the core, resulting in a larger Large eddy current loss, and the iron core lamination process is complicated, and the processing cost is high; if a solid iron core is used, although the process is simple and the cost is low, the iron core will generate greater eddy current loss, which greatly reduces the efficiency of the motor. At the same time, due to the existence of magnetic coupling between phases, on the one hand, the existe...

Claims

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Application Information

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IPC IPC(8): H02K41/03
Inventor 寇宝泉李鹏周维正
Owner HARBIN INST OF TECH