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High-power harmonic wave excitation generator

A harmonic excitation and generator technology, applied to the shape/style/structure of winding conductors, can solve the problems of high voltage waveform distortion rate, achieve good voltage quality, small waveform distortion rate, and reduce waveform distortion rate.

Inactive Publication Date: 2012-06-27
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology

[0003] In order to solve the problem of high voltage waveform distortion rate of the third harmonic winding and the main winding of the existing harmonic excitation generator, the present invention provides a high-power harmonic excitation generator

Method used

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Embodiment Construction

[0009] High-power harmonic excitation generator, including the stator, the main winding embedded in the stator slot and the third harmonic winding, the number of stator slots is 96, the number of poles is 8, the main winding is double-layer wave winding, and the third harmonic winding is unequal turns The single-layer concentric winding, that is, in the 8 slots under each pole pair of the third harmonic winding (the number of third harmonic magnetic field poles is 3 times that of the fundamental wave, then the third harmonic magnetic field pole distance τ 3 =96 / 8×3=4 slots, the pole pair is 8 slots), the number of conductors in the third slot and the seventh slot is zero, the first slot and the fifth slot are embedded with single-layer concentric coils, the second slot and The fourth slot is embedded with single-layer concentric coils in series with the single-layer concentric coils in the first and fifth slots, and the sixth and eighth slots are embedded with single-layer conc...

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Abstract

The invention relates to a generator, in particular to a high-power harmonic wave excitation generator which solves the problem of higher voltage waveform aberration rate of a triple harmonic wave winding and a primary winding of the existing harmonic wave excitation generator. The high-power harmonic wave excitation generator comprises a stator, a primary winding and a triple harmonic wave winding embedded in a stator groove, wherein the primary winding is a double-layer wave winding; the triple harmonic wave winding is a single-layer concentric type winding with different turns, i.e., in eight grooves under each pole pair of the triple harmonic wave winding, no conductors are arranged in a third groove and a seventh groove; the ratio of the number of turns of the single-layer concentriccoils in the first and fifth grooves to the number of turns of the single-layer concentric coils in the second, fourth, sixth and eighth grooves is 1:0.707 which is rounded; and the primary winding adopts a short-range winding. The waveform aberration rate of the triple harmonic wave winding can be reduced to 15 percent and the waveform aberration rate of the primary winding can be reduced by 4.8percent. The excitation generator is applicable to mining electric drive dumper lorries and also can be used in other fields of railway, generating plant, industrial and mining, and the like.

Description

technical field [0001] The invention relates to a generator, in particular to a high-power harmonic excitation generator. Background technique [0002] Harmonic excitation generators are widely used in power stations, mobile power supplies, military refrigerated vehicles and other fields as self-excited constant voltage power supplies due to their good phase compound excitation functions, but they are mostly small power grades. At present, the harmonic excitation generators for 130t, 154t, 170t and other large electric drive dump trucks in the mining field mainly rely on imports. The main winding of the existing harmonic excitation generator includes two sets of windings. The two sets of windings adopt double-layer wave windings and are respectively connected in a star shape. The current, that is, the six-phase double star shifts 30° electrical angle. The composite pitch and the first pitch of the two sets of main windings of the existing harmonic excitation generator are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/12H02K3/28
Inventor 张广兴李彩霞雷平振秦转丽
Owner CRRC YONGJI ELECTRIC CO LTD
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