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A Seventh Harmonic Excitation Brushless Synchronous Generator

A synchronous generator and sub-harmonic technology, applied in the field of electric power equipment, can solve problems affecting electrical performance, inability to arrange orthogonally, electromagnetic interference, etc., and achieve excellent electrical performance

Active Publication Date: 2017-05-10
TELLHOW SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a brushless synchronous generator with seventh harmonic excitation, to overcome the disadvantages of using the fifth harmonic magnetic technology under the conditions of 42 slots in the generator stator, 4 poles, and 3 phases. Defects, because under this condition, the 3-phase fifth harmonic winding and the 3-phase main winding cannot be arranged orthogonally, and there is electromagnetic interference between the main winding and the fifth harmonic winding, which affects the electrical performance. Make a high-quality brushless generator

Method used

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  • A Seventh Harmonic Excitation Brushless Synchronous Generator
  • A Seventh Harmonic Excitation Brushless Synchronous Generator
  • A Seventh Harmonic Excitation Brushless Synchronous Generator

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Embodiment Construction

[0011] like figure 1 As shown, a seventh harmonic excitation brushless synchronous generator is implemented, the number of stator slots is 42, the number of poles is 4 poles, the number of phases is 3 phases, and the number of parallel branches is a=2. The stator main winding is a fractional slot without Double-layer winding with equal turns. Taking the U phase as an example, the number of parallel branches of the UN winding is a=2, U1N1 is a parallel branch, U2N2 is another parallel branch, U1N1 is a coil group, U2N2 is another coil group, each phase, such as UN ( That is, U phase) has 2 coil groups, and there are 6 coil groups in three phases.

[0012] Take a coil group U1N1 as an example. Each coil group has seven coils. The seven coils are composed of two concentric coils. The first part has four concentric coils. The coil pitches are 10, 8 from large to small. , 6, 4, and the number of turns of each coil from large to small is 8, 6, 4, 1; the second part has three conce...

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Abstract

The invention discloses a seventh-harmonic excitation brushless synchronous generator. The generator mainly consists of a main generator and an alternating current exciter which are coaxial with each other, wherein a direct current excitation source of a stator pole winding of the alternating current exciter is from a direct current power supply formed by rectifying a three-phase seven-harmonic winding in a stator iron core of the main generator by a rectifier; a stator of the generator is provided with 42 slots, 4 poles and 3 phases; a rotor of the main generator is of an integrated convex pole type. The electrical performance of the seven-harmonic excitation brushless synchronous generator disclosed by the invention is higher than that of fundamental wave excitation, third-harmonic excitation and fifth-harmonic excitation brushless synchronous generators.

Description

technical field [0001] The invention relates to a kind of electric equipment, in particular to a seventh-order harmonic excitation brushless synchronous generator. Background technique [0002] National Invention Patent Publication No. CN101562382A ZL200910115439.8 discloses a five-order harmonic excitation brushless synchronous generator. The five-order harmonic excitation brushless synchronous generator overcomes the small multiple of the fundamental excitation short-circuit current and the electromagnetic interference with the main winding. It also overcomes the defect that the neutral current demagnetizes the third harmonic magnetic field when the third harmonic excitation generator is connected in parallel. Therefore, the electrical performance of the fifth harmonic excitation brushless synchronous generator is better than that of the fundamental excitation and the third harmonic The characteristics of the excitation brushless synchronous generator with better electrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K19/38H02K19/28H02K3/28
Inventor 林政安
Owner TELLHOW SCI TECH CO LTD