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An asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor

A technology of mixed excitation and switching flux linkage, which is applied in the direction of electromechanical devices, electrical components, electric components, etc., can solve the problems of difficult adjustment of the magnetic field and unfavorable high-speed operation of the motor, so as to reduce mutual inductance, ensure constant power operation range of weak magnetic field, avoid competing effects

Active Publication Date: 2020-05-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic field of the traditional permanent magnet switch flux linkage linear motor is difficult to adjust, which is not conducive to the high-speed operation of the motor; because the hybrid excitation motor can easily adjust the size of the magnetic field, it can improve the overload capacity of the motor and the constant power operating range of weak magnetic field

Method used

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  • An asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor
  • An asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor
  • An asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor of this embodiment includes a long stator 1 and a short mover 2, the short mover 2 includes primary I and primary II, and primary I includes a U-shaped armature Iron core 211, permanent magnet I, armature winding 213, primary II includes excitation core 221, excitation winding 222 and permanent magnet II; permanent magnet I is arranged alternately, and the magnetization direction of adjacent permanent magnet I is opposite, and the magnetization direction is the same as The direction of movement is consistent, the primary I and primary II are fixed on the mobile platform, the two are relatively stationary, and both maintain a certain air gap with the long stator 1. The permanent magnet II is embedded in the field teeth of the field core 221, and the field winding 222 is set on the salient pole of the field core 221 to form a field pole. The polarity of the...

Embodiment 2

[0036] Figure 4 The structure shown is a deformed structure of Embodiment 1, and figure 1 The difference is that the magnetic isolation bridge 214 is added, so that the primary I stamping pieces are connected as a whole, avoiding the repulsive force between adjacent permanent magnet poles to cause installation difficulties and facilitate processing. The disadvantage is that part of the permanent magnet I is inevitably short-circuited. flux linkage, reducing thrust density

Embodiment 3

[0038] Such as Figure 5 As shown, this embodiment is another modified structure for the first embodiment. By adding fault-tolerant teeth 215 in the armature slots, the degree of coupling between adjacent coils can be reduced, thereby reducing the coupling between adjacent coils. Mutual inductance is beneficial to improve the fault tolerance performance of the motor.

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Abstract

The invention discloses an asymmetric double-sided dual-permanent-magnet hybrid excitation switch flux linkage linear motor which comprises a long stator and a short rotor. The short rotor comprises aprimary portion I and a primary portion II, the primary portion I comprises U-shaped armature cores, permanent magnets I and armature windings, and the primary portion II comprises excitation cores,excitation windings and permanent magnets II. The asymmetric double-sided dual-permanent-magnet hybrid excitation switch flux linkage linear motor has the advantages that the short rotor is divided into two portions, the primary portion I is arranged on one side of the short rotor, the primary portion II is arranged on the other side of the short rotor, the primary portion I and the primary portion II are independent from each other and are positioned on different sides of the long stator, accordingly, the asymmetric double-sided dual-permanent-magnet hybrid excitation switch flux linkage linear motor has merits of magnetic flux switching type structures, and the shortcoming of competition of existing excitation windings, existing armature windings and existing permanent magnets for electric circuits and magnetic circuits can be effectively overcome; the asymmetric double-sided dual-permanent-magnet hybrid excitation switch flux linkage linear motor is of a double-sided permanent magnet structure, and accordingly the thrust density of the asymmetric double-sided dual-permanent-magnet hybrid excitation switch flux linkage linear motor can be increased; currents of the excitation windings can be changed, air-gap magnetic fields can be changed, hybrid excitation can be implemented, accordingly, the weak-magnetism constant-power operation ranges can be assuredly expanded, and the overload capacity can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and in particular relates to an asymmetric double permanent magnet hybrid excitation switch flux linkage linear motor. Background technique [0002] Linear motors can directly convert electrical energy into mechanical energy without an intermediate transmission mechanism, which can improve the efficiency of the entire transmission system. At the same time, because they are not affected by the centrifugal force in the rotating motor, the speed can also be unlimited theoretically, which is convenient for high-speed operation. . In recent years, the research hotspot in the field of linear direct drive is the permanent magnet synchronous linear motor, which has the advantages of high thrust density, high efficiency, and high speed response, and is widely used in CNC machine tools, semiconductor processing, vertical transportation systems, high-speed ground transportation systems, etc. Perfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K41/03
CPCH02K41/031H02K2213/03
Inventor 卢琴芬曾志强
Owner ZHEJIANG UNIV
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