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Series capacitors-running single phase permanent magnet synchronous generator

A synchronous generator and single-phase permanent magnet technology, which is applied to synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, electrical components, etc., can solve the problem of single-phase permanent magnet generator synchronous generators. Realize and affect the normal operation of the generator, etc., to achieve the effect of reducing vibration and noise, suppressing vibration and noise, and increasing output power

Inactive Publication Date: 2011-05-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The first three technical schemes and the scheme with two sets of windings for the stator and rotor are more practical for electrically excited single-phase synchronous generators, but for single-phase permanent magnet generators, especially for single-phase permanent magnet synchronous generators with a surface magnetic steel structure Difficult to achieve, since the rotor has no place for damper windings structurally
Therefore, the output power of the single-phase permanent magnet synchronous generator with surface magnetic steel structure can reach about 10 kilowatts. After the output power continues to increase, the mechanical vibration and noise seriously affect the normal operation of the generator.

Method used

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  • Series capacitors-running single phase permanent magnet synchronous generator
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  • Series capacitors-running single phase permanent magnet synchronous generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Depend on figure 1 It can be seen that the rotor of the single-phase permanent magnet synchronous generator operated by series capacitors of the present invention adopts a surface magnetic steel structure, and the permanent magnetic steel G6 is fixed on the rotor core G4 with stainless steel screws G7, and the rotor core G4 is processed from No. 20 steel ; The rotor core G4 is installed on the rotating shaft G1, and the rotating shaft G1 is supported on the end cover G3 through two bearings G2 at both ends, and the end cover G3 is fixed on both ends of the casing G9 and sealed by the O-shaped sealing gasket G10; the fan G12 is fixed On the end of the non-mechanical input end of the rotating shaft G1, the generator is air-cooled, and the fan cover G11 is set on the non-mechanical input end of the casing G9 as a safety shield for the fan G12.

[0039] Such as figure 2 As shown, the number of poles of the generator in this embodiment is 4 poles, N and S magnetic poles ar...

Embodiment 2

[0045] The overall structure of the generator in this embodiment is the same as that in Embodiment 1, but the A and B two-phase armature windings with 4 poles and 24 slots adopt double-layer short-distance distributed windings to further weaken the influence of harmonic magnetic field on induced electromotive force. Such as figure 1 As shown, the A and B two-phase armature windings G5 with a mutual difference of 90 degrees in electrical angle are placed in the stator core G8. Among them, the schematic diagram of the distribution of the phase A double-layer short-distance distributed winding is as follows: Figure 8 As shown, the number of slots per pole and phase is 3, and the number of winding pitches is 5, that is, the first coil is placed in the No. 1 slot of the stator core G8, the tail side is placed in the No. 6 slot, and so on. The first side (upper side) of each coil of the A-phase winding is placed in the stator slots with slot numbers (1, 2, 3, 7, 8, 9, 13, 14, 15, ...

Embodiment 3

[0048] The overall structure of the generator in this embodiment is the same as that in Embodiment 1, but the two-phase armature winding with 4 poles and 36 slots adopts a fractional slot winding to further weaken the influence of the cogging harmonic field on the induced electromotive force in the armature winding. Such as figure 1 As shown, the A and B two-phase armature windings G5 with a mutual difference of 90 degrees in electrical angle are placed in the stator core G8. The schematic diagram of the distribution of phase A fractional slot windings is as follows: Figure 9 Shown, the number of slots per pole per phase is , For example, there are 4 consecutive slots under a pole belonging to the A-phase winding, and there are 5 slots under the adjacent pole belonging to the A-phase winding. The number of winding pitches is 7, that is, the first side of the first coil is placed in the No. 1 slot of the stator core G8, the tail side is placed in the No. 8 slot, and so on. ...

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Abstract

The invention relates to a series capacitors-running single phase permanent magnet synchronous generator comprising a two-phase permanent magnet synchronous generator and an external running capacitor (C1), wherein the permanent magnet generator adopts a surface magnetic steel or embedded type permanent magnet rotor structure; two-phase armature windings with the difference of space electrical angle of 90 DEG are placed in a stator core, have the same distribution forms and adopt single-layer distributed windings, two-layer distributed windings or sine distributed windings. The proper capacitor (C1) is connected in series with one phase winding with hysteresis electrodynamic force and then connected in parallel with the other phase winding to output a single phase voltage outside so that current amplitudes of the two-phase armature windings are approximately equal, a phase difference is close to 90 DEG, an armature current resultant magnetic field is circular or elliptic, and influences of a pulse vibration magnetomotive field generated by the single phase armature current on waveform distortion of the generator output voltage, vibration and noise are reduced. Because all stator slots are fully utilized in the generator, the output power of the generator is improved by more than 40% to the maximum degree in comparison with the traditional single-phase generator of the same size, the size of the generator is reduced.

Description

technical field [0001] The invention relates to a permanent magnet synchronous generator, in particular to a single-phase permanent magnet synchronous generator operated by series capacitors. Background technique [0002] Vehicle power supplies, mobile power supplies for field operations, and emergency backup power supplies are mostly small single-phase synchronous generators, and the current development trend is that the capacity continues to increase. Compared with the traditional electric excitation synchronous motor, the permanent magnet synchronous motor has the advantages of no need for rotor excitation, high efficiency and small size, so the single-phase permanent magnet synchronous generator has been used more and more. However, when the single-phase synchronous generator is loaded, the AC current flowing through the single-phase armature winding does not generate a circular magnetic field like a three-phase motor, but generates a pulse vibration magnetomotive force ...

Claims

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Application Information

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IPC IPC(8): H02K21/12H02K11/00H02K21/02H02K1/16H02K3/12
Inventor 刘明基林雪华古琳盛尹柳朱晨宸廖姗姗
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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