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Double-stator conical adjustable air gap permanent magnet motor

A permanent magnet motor, double stator technology, applied in electrical components, electromechanical devices, etc., can solve problems such as the reduction of motor efficiency, and achieve the effects of wide speed expansion range, simple field weakening method, and good adjustment performance.

Active Publication Date: 2011-06-15
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 problem that the efficiency of the permanent magnet motor with the existing traditional structure is reduced, the present invention proposes a double-stator conical adjustable air gap permanent magnet motor

Method used

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  • Double-stator conical adjustable air gap permanent magnet motor

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specific Embodiment approach 1

[0007] Specific implementation mode 1: Combination figure 1 , figure 2 or image 3 To illustrate this embodiment, this embodiment includes a stator, a rotor, a support frame, and two rotor slides; the stator includes an outer stator core 6, an inner stator core 8 and a stator winding 9. The stator windings 9 are respectively arranged on the outer stator core 6 and the inner stator. On the sub core 8, the outer stator core 6, the rotor 7 and the inner stator core 8 are fixed on the support frame. The outer stator core 6, the rotor 7 and the inner stator core 8 are coaxially sleeved together from the outside to the inside. An equal inner air gap a is provided between the surface and the inner surface of the rotor 7; an equal outer air gap b is provided between the outer surface of the rotor 7 and the inner surface of the outer stator core 6, the outer surface of the inner stator core 8 and the inner surface of the rotor 7 The outer surface of the rotor 7 and the inner surface of...

specific Embodiment approach 2

[0008] Specific implementation manner two: combination figure 1 This embodiment is described. The difference between this embodiment and the first embodiment is that the outer surface of the inner stator core 8, the inner surface of the rotor 7, the outer surface of the rotor 7 and the inner surface of the outer stator core 6 are all cones. The specific embodiment one is the same. Both the inner and outer stator cores produce axial magnetic pull and torque on the rotor. Through the control of the stator winding 9 current, the appropriate axial displacement of the rotor 7 can be obtained, the air gap is enlarged, the air gap magnetic field is weakened, and the weak magnetic field is realized. At the same time, the stator winding 9 current is controlled to increase the air gap. In this case, sufficient output torque can be obtained.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the outer surface of the inner stator core 8 and the inner surface of the rotor 7 are both tapered, and the outer surface of the rotor 7 and the inner surface of the outer stator core 6 are both cylindrical; The magnetic pulling force is only produced by the action of the inner stator core 8 on the rotor 7, and the torque is produced by the inner stator core 8 and the outer stator core 6 together. The other composition and connection relationship are the same as in the first embodiment. By controlling the current of the stator winding 9 in the inner stator core 8, a suitable axial displacement of the rotor can be obtained to increase the air gap, thereby weakening the air gap magnetic field and realizing weak magnetic field expansion, and at the same time the stator winding of the outer stator core 6 9 Current con...

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Abstract

The invention relates to a double-stator conical adjustable air gap permanent magnet motor, which relates to the field of motors and solves the problem that the prior permanent magnet motor with a conventional structure has low efficiency. An outer stator core, a rotor and an inner stator core are coaxially sleeved together from outside to inside in turn, equal inside air gaps and outer air gaps are formed between the stator core and the rotor, both the outer surface of the inner stator core and the inner surface of the rotor are conical surfaces or cylindrical surfaces, and both the outer surface of the rotor and the inner surface of the outer stator core are conical surfaces or cylindrical surfaces; and a rotor slideway is arranged on an annular opening of a rotor output shaft of a supporting rack, the other rotor slideway is arranged at the end position of an inner rotor of the supporting rack, the rotor output shaft passes through a rotor slideway and is fixed on the supporting rack, the end part of the rotor passes through the other rotor slideway and is fixed in the supporting rack, and the rotor also comprises an air gap adjusting mechanism which is arranged between the endpart of the rotor and the other rotor slideway. The double-stator conical adjustable air gap permanent magnet motor has the advantages of good adjusting performance, wide speed-expanding range and sufficient torque.

Description

Technical field [0001] The invention relates to the field of motors, in particular to a double stator cone adjustable air gap permanent magnet motor. Background technique [0002] Permanent magnet motors with traditional structures often adjust the stator current to achieve the purpose of field weakening speed increase. Although the field weakening speed can be achieved, the increase in the stator current direct axis armature current reduces the motor efficiency and limits the system speed regulation range Further broaden. Summary of the invention [0003] In order to solve the problem of reduced efficiency of the existing permanent magnet motor with a traditional structure, the present invention proposes a double stator cone adjustable air gap permanent magnet motor. [0004] The invention includes a stator, a rotor, a support frame and two rotor slides; the stator includes an outer stator core, an inner stator core and a stator winding. The stator windings are respectively arrang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K16/04
Inventor 柴凤程树康裴宇龙刘伟亮
Owner HARBIN INST OF TECH
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