LTL-type double-salient-pole hybrid excitation generator

A hybrid excitation and double salient pole technology is applied in the direction of magnetic circuits, electric components, electrical components, etc., to achieve the effects of weak phase voltage asymmetry, excellent electromagnetic performance, and reduced copper consumption

Inactive Publication Date: 2019-09-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the existing technology, the present invention proposes a "LTL" type structure generator based on the technical basis of the existing hybrid excitation double salient pole motor, which can effectively reduce the DC bus voltage of the generator caused by the asymmetry of the three-phase magnetic circuit The fluctuation problem greatly improves the DC output voltage performance and improves the motor efficiency

Method used

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Effect test

Embodiment 1

[0030] figure 1 It is a structural schematic diagram of the 12 / 8 type "LTL" double-convex hybrid excitation generator of the present invention, where k=2, the total number of main poles is 4, the number of stator poles is 12, and the number of rotor poles is 8. Each stator pole is about its own center line Symmetrical, and the angle θ between the centerlines s =2π / 6k=π / 6, the width of the stator poles is the same. "L" type stator pole tooth tip arc angle β s Both are β s = α s θ s ,α s is the stator arc coefficient, the value is 0.5, so the stator arc angle is β s = α s θ s = π / 12,k T If the value is 4 / 3, then the polar arc k of the "T"-shaped addendumT beta s = π / 9. Compared with the traditional doubly salient pole hybrid excitation generator, the above-mentioned "LTL" double-convex hybrid excitation generator has similar magnetic circuit length, magnetic circuit width and magnetic circuit Saturation characteristics, better three-phase symmetry.

[0031] Such as ...

Embodiment 2

[0034] figure 2 It is a structural schematic diagram of the 6 / 4 type "LTL" double-convex hybrid excitation generator of the present invention; here k=1, the total number of main poles is 2, the number of stator poles is 6, and the number of rotor poles is 4. Each main pole is symmetrical about its respective centerline, and the angle θ between the centerlines s =2π / 6k=π / 3, the width of the stator poles is the same. "L" type stator pole tooth tip arc angle β s Both are β s = α s θ s ,α s is the stator arc coefficient, the value is 0.6, so the stator arc angle is β s = α s θ s = π / 5,k T If the value is 1.226, then the polar arc k of the "T"-shaped addendum T beta s =49π / 200.

[0035] The above-mentioned "LTL" double-convex hybrid excitation generator has the advantages of good three-phase voltage balance, small DC output voltage fluctuation, and high motor efficiency.

Embodiment 3

[0037] image 3 It is a structural schematic diagram of the 18 / 12 type "LTL" double-convex hybrid excitation generator of the present invention; here k=3, the total number of main poles is 6, the number of stator poles is 18, and the number of rotor poles is 12. Each main pole is symmetrical about its respective centerline, and the angle θ between the centerlines s =2π / 6k=π / 9, the width of the stator poles is the same. "L" type stator pole tooth tip arc angle β s Both are β s = α s θ s ,α s is the stator arc coefficient, the value is 0.4, so the stator arc angle is β s = α s θ s = 2π / 45,k T If the value is 1.237, then the polar arc k of the "T"-shaped addendum T beta s =11π / 200.

[0038] The above-mentioned "LTL" double-convex hybrid excitation generator also has the advantages of low DC output voltage fluctuation and good three-phase symmetry.

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Abstract

The invention discloses an LTL-type double-salient-pole hybrid excitation generator, and belongs to the field of double-salient-pole structure motors. The motor comprises a stator iron core, a rotor iron core, an excitation winding, a permanent magnet, an armature winding, a motor shell and a rotating shaft. The stator iron core and the rotor iron core are of a double-salient-pole structure, and each main pole in the stator iron core comprises three stator poles. The rotor iron core is positioned in the stator iron core and is fixed with the rotating shaft; the exciting winding is wound in the main pole of the stator core in a centralized winding manner; the permanent magnet is embedded in a yoke part of the stator iron core, wherein one end is connected with the motor shell, and the other end is connected with a magnetic isolation bridge of the stator iron core; the armature winding is wound in the stator pole of the stator iron core in a centralized winding manner; and the motor shell is fixed outside the stator iron core. The motor winding is large in space, the three-phase inductance symmetry is good, three-phase voltage imbalance caused by local saturation does not exist, the operation efficiency is high, and uncontrolled rectification output voltage fluctuation is low.

Description

technical field [0001] The invention belongs to the field of double salient pole structure motors, in particular to an LTL type double salient pole hybrid excitation generator. Background technique [0002] In 1992, Y.Liao, F.Liang and T.A.Lipo first proposed a new double salient pole permanent magnet motor structure, which moved the permanent magnet on the rotor of the traditional permanent magnet motor to the stator yoke, and the operating principle was different from the traditional permanent magnet The motor can be considered as a combination of switched reluctance motor and stator permanent magnet excitation. Meng Xiaoli, Wang Li and Yan Yangguang of Nanjing Aerospace Engineering replaced the stator permanent magnets of double salient pole permanent magnet motors with excitation windings, placed them in the stator slots, and proposed a new motor structure in 2005. The stator electric excitation double salient pole motor. [0003] In 2010, Cheng Ming combined electric ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K1/17H02K1/24H02K3/18
CPCH02K1/146H02K1/17H02K1/24H02K3/18H02K2213/03
Inventor 章玮姚叔春
Owner ZHEJIANG UNIV
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