CN201860238U - Single-phase permanent magnet synchronous generator with operating serial capacitors - Google Patents
Single-phase permanent magnet synchronous generator with operating serial capacitors Download PDFInfo
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- CN201860238U CN201860238U CN2010206221109U CN201020622110U CN201860238U CN 201860238 U CN201860238 U CN 201860238U CN 2010206221109 U CN2010206221109 U CN 2010206221109U CN 201020622110 U CN201020622110 U CN 201020622110U CN 201860238 U CN201860238 U CN 201860238U
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Abstract
The utility model relates to a single-phase permanent magnet synchronous generator with operation of serial capacitors, which is composed of a two-phase permanent magnet synchronous generator and an externally connected operation capacitor (C1). Surface magnet steel or a built-in permanent magnet rotor structure is adopted for the permanent magnet generator. Two phase armature windings which differ from each other by 90 DEG spatial electrical angle are placed in a stator core and have same distribution forms. A single-layer distribution winding, a double-layer winding or a sine distribution winding is adopted. An appropriate capacitor (C1) is connected with one phase winding with electrodynamic potential in series, and then the phase winding is connected with the other phase winding parallelly for outputting single-phase voltage outwards so the amplitudes of the two phase winding currents are approximately same. The phase difference is 90 DEG approximately. An armature current resultant magnetic field is circular or elliptical. The effect of the pulsating magnetic field generated by single phase armature current to output voltage waveform distortion of the power generator, the vibration and the noise are reduced. The power generator sufficiently utilizes all grooves of the rotor. An output power can be increased by more than 40% compared with a traditional single-phase power generator with a same volume. The volume of the power generator is reduced.
Description
Technical field
The utility model relates to a kind of magneto alternator, and the single-phase permanent synchronous generator of operation is held in particularly a kind of crosstalk.
Background technology
Power supply on vehicle, field work are many based on small-sized single phase synchronous generator with portable power source and emergency power supply, and present development trend is that capacity constantly increases.With respect to traditional electric excitation synchronous motor, permagnetic synchronous motor has advantages such as the rotor-exciting of need not, efficient height and volume are little, so the single-phase permanent synchronous generator is more and more used.When but single phase synchronous generator has load, the alternating current that single-phase armature winding flows through produces circular magnetic field unlike three phase electric machine, but in motor, produce the pulsating magnetomotive force, it is identical and with the positive sequence magnetomotive force and the negative phase-sequence magnetomotive force of the positive and negative direction rotation of synchronous speed that the pulsating magnetomotive force can be decomposed into two amplitudes, and the voltage sinusoidal waveform that export when causing the generator belt load in negative phase-sequence magnetic field wherein distortion influence the quality that generator is exported electric energy; It is more violent that more seriously the pulsation moment that armature impulsive magnetic field and the acting in conjunction of generator amature permanent magnetic field produce when the single-phase generator output capacity increases makes the vibration and the noise of motor generation, even threaten the safe operation of generator.
In order to solve output voltage distortion and mechanical oscillation and the noise problem that negative phase-sequence magnetic field causes, the technical measures of often taking at present at electric excitation single phase synchronous generator are as follows:
1. adopt rational skewed stator slot, the positive chorded winding of stator or the double-deck short distance winding of 120 degree facies tracts.
2. suitable amplification air gap to increase air-gap reluctance, reduces negative phase-sequence magnetic field, reduces the ratio of notch and air gap simultaneously.
3. change the rotor winding parameter, adopt the heavy damping winding, principal mode has full cage damping winding, half cage damping winding and 1/4 cage damping winding.
Preceding two kinds of methods fine inhibition of energy and elimination slot ripples and high order harmonic component are to the influence of voltage waveform, but little for the weakening effect in negative phase-sequence magnetic field, what monophase current produced still is impulsive magnetic field; The third method adopts the heavy damping winding can at utmost weaken the influence in negative phase-sequence magnetic field on rotor.Adopt on the technical measures basis that suppresses negative phase-sequence magnetic field the domestic high-power single-phase electricity excitation synchronous generator of 2000KW of successfully having developed comprehensive.But these three kinds of technical measures are to be cost to increase material usage.
The electric current that the woods of University of Fuzhou Li Wenfu precious and Lanzhou Electric Machine Co., Ltd. has proposed to utilize negative phase-sequence magnetic field to respond on the rotor winding provides the scheme of excitation for single-phase generator, generator unit stator has two cover windings of mutual deviation 90 degree, wherein a cover winding is by the external capacitor short circuit, and another set of winding is outwards exported electric energy as the power winding.The mutually perpendicular winding of two covers is also arranged on rotor simultaneously, and the voltage of 2 times of fundamental frequencies that negative phase-sequence magnetic field is responded in the rotor winding provides excitation for generator amature behind rotary rectifier.
First three plants technical scheme and rotor, and to be respectively the scheme of two cover windings practical for electric excitation single phase synchronous generator, but for single-phase permanent generator especially rotor is that the single-phase permanent synchronous generator of surperficial magnet steel structure be difficult to be realized, because structurally rotor is not installed the position of damping winding.Therefore the single-phase permanent synchronous generator power output of present surperficial magnet steel structure can reach about 10 kilowatts, and mechanical oscillation and noise thereof had had a strong impact on the operate as normal of generator after power output continued to increase.
The utility model content
Deficiency at above-mentioned prior art existence, the utility model proposes a kind of crosstalk and hold the single-phase permanent synchronous generator of operation, its main components comprises the magneto alternator that is made of end cap, casing, rotating shaft, p-m rotor iron core, permanent magnetic steel, stator core and armature winding and external series operation electric capacity, it is characterized in that:
Place the quadrature armature winding that two-phase spatially differs 90 degree electrical degrees in the-permanent magnet generator machine stator;
The armature winding of-two-phase mutually orthogonal has identical winding distribution form and parameter, can adopt the distributed winding of individual layer, double-deck distributed winding or Sine distribution winding;
-rotor of permanent-magnetic power generator adopts surperficial magnet steel structure or built-in magnet steel structure.
Phase winding that electromotive force lags behind in the described generator and external operation capacitances in series are then with the common output as single-phase generator in parallel of the leading phase winding of electromotive force.
The single-phase permanent synchronous generator that operation is held in a kind of crosstalk of the present utility model is placed the two-phase armature winding that differs 90 degree electrical degrees in same stator core.Stator core is formed by silicon steel plate stacking, and stator poles/groove cooperates the utmost point/groove ratio that adopts traditional two-phase motor distributed winding or double-deck short distance to distribute, and also can adopt sinusoidal design of Windings, to reduce the harmonic content in the armature winding electromotive force.Two phase windings have identical distribution form and parameter, the tail end of two phase windings is connected together as an end of the single-phase output of generator, in the phase winding that electromotive force lags behind polyphone insert behind the electric capacitor and an end parallel connection of electromotive force leading phase winding as the other end of the single-phase output of generator.
In order to reduce the voltage regulation of generator, the single-phase permanent synchronous generator rotor that operation is held in crosstalk of the present utility model is traditional surperficial magnet steel structure, also can adopt interior permanent magnetic steel structure for the less generator of capacity, p-m rotor further reduces the harmonic content of armature winding induced electromotive force by selecting suitable pole embrace or pole form optimal design.
The single-phase permanent synchronous generator of crosstalk appearance of the present utility model operation compared with prior art has following characteristics:
1) by series capacitance in the phase armature winding therein, make single-phase permanent synchronous generator armature resultant magnetic field be circular or oval magnetic field, weakened of the influence of negative phase-sequence magnetic field, the more important thing is from suppressed vibration and noise that negative phase-sequence magnetic field causes in essence generator operation to the output voltage waveforms distortion.
2) permanent magnet generator two-phase Winding Design can be utilized all stator slots, and wherein a phase winding holds back and another phase winding common outwards power output in parallel by crosstalk, improved the power output of generator, and owing to reduced operating vibration and noise, it is bigger that generator capacity can design.
Description of drawings
Below in conjunction with accompanying drawing the utility model is elaborated:
Fig. 1 is a single-phase permanent synchronous generator axial section schematic diagram;
Fig. 2 is a single-phase permanent synchronous generator p-m rotor schematic cross-section;
Fig. 3 is a single-phase permanent synchronous generator individual layer distributed winding A phase winding distribution map;
Fig. 4 is a single-phase permanent synchronous generator individual layer distributed winding B phase winding distribution map;
Fig. 5 is a single-phase permanent synchronous generator operation logic schematic diagram;
Fig. 6 is crosstalk A, B biphase current oscillogram when holding the single-phase permanent synchronous generator strip resistance load of operation;
Fig. 7 is single-phase permanent synchronous generator band power factor that operation is held in crosstalk A, a B biphase current oscillogram when being 0.8 inductive load;
Fig. 8 is the double-deck short distance distributed winding of a single-phase permanent synchronous generator A phase winding distribution map;
Fig. 9 is a single-phase permanent synchronous generator fractional slot winding A phase winding distribution map;
Figure 10 is a single-phase permanent synchronous generator fractional slot winding B phase winding distribution map.
Reference numeral:
The G1-rotating shaft, G2-bearing, G3-end cap, G4-permanent magnet machine rotor iron core, G5-armature winding, G6-permanent magnetic steel, the non-magnetic stainless steel screw of G7-, G8-stator core, G9-casing, G10-O grommet type seal circle, G11-fan guard, G12-fan, the impedance of Zl-generator single-phase load, the AX-A phase winding, the BY-B phase winding
-electromotive force leading phase (A phase) winding electric kinetic potential phasor,
-electromotive force hysteresis phase (B phase) winding electric kinetic potential phasor, Ra-A phase winding resistance, Rb-B phase winding resistance, the reactance of Xa-A phase winding, the reactance of Xb-B phase winding, the series capacitance of the external operation of C1-, 1 to 36 is single-phase permanent generator unit stator groove label.
Embodiment
Several preferential examples of implementation accompanying drawings of the present utility model is as follows:
Embodiment one
As shown in Figure 1, the single-phase permanent synchronous generator rotor that operation is held in crosstalk of the present utility model adopts surperficial magnet steel structure, and permanent magnetic steel G6 adopts stainless steel screw G7 to be fixed on the rotor core G4, and rotor core G4 is that two No. ten steel process; Rotor core G4 is installed on the rotating shaft G1, and rotating shaft G1 is supported on the end cap G3 by two bearing G2 at two ends, and end cap G3 is fixed on the two ends of casing G9, and is sealed by O grommet type seal circle G10; Fan G12 is fixed on the termination of rotating shaft G1 on-mechanical input, and fan guard G11 is enclosed within the on-mechanical input of casing G9, as the safty shield of fan G12.
As shown in Figure 2, the generator number of poles is 4 utmost points in the present embodiment, N, S magnetic pole arranged alternate, and pole embrace is 0.75.
The teeth groove number of stator core G8 is 24 grooves in the present embodiment, stator core G8 is placed in the casing G9, embed A, the B two-phase armature winding G5 of mutual deviation 90 degree electrical degrees among the stator core G8, A, B two-phase individual layer distributed winding distribution map are respectively as shown in Figure 3 and Figure 4, every extremely every phase groove number is 3, and the winding pitch number is 6 (pole spans), and promptly the first limit of first coil is placed in No. 1 groove of stator core G8, trailing edge is placed in No. 7 grooves, and the rest may be inferred by analogy for it.Groove number is the first limit of placing each coil of A phase winding in the stator slot of (1,2,3,13,14,15), and (7,8,9,, 19,20,21) number stator slot is placed the trailing edge of corresponding each coil of A phase winding; Groove number is the first limit of placing each coil of B phase winding in the stator slot of (4,5,6,16,17,18), places the trailing edge of each corresponding coil of B phase winding in (10,11,12,22,23,24) number stator slot.Per three coils series connection constitutes a coil groups, and 2 coil groups of each phase are in series and constitute a phase armature winding.
As shown in Figure 5, the tail end X of A, B two phase windings and Y are connected together as an end of single-phase generator output, behind the head end series capacitance C1 of the phase that lags behind in time (being the B phase here) winding with the head end parallel connection of leading phase in time (be here A mutually) winding, as the other end of single-phase generator output.
According to A, the parameter of B two-phase armature winding and the size of load resistance, select suitable series capacitance C1 (series capacitance C1 chooses 220 microfarads) here, can generator with the pure resistive loads situation under the current amplitude of two-phase armature winding equate and phase difference is 90 degree, biphase current waveform when Fig. 6 is single-phase permanent generator belt 15kW resistive load, wherein solid line is the A phase current waveform, dotted line is the B phase current waveform, and the synthetic fundamental wave magnetic field of two-phase armature supply this moment is desirable circular magnetic field.
When the generator belt power factor is the load of 0.8 perception (hysteresis quality), even series capacitance in hysteresis phase winding (being the B phase here), the amplitude of A, B two-phase armature supply is no longer equal, phase difference also no longer is 90 degree simultaneously, but size according to A, B two-phase armature winding and load impedance Zl parameter, by selecting suitable capacitor C 1 size (series capacitance C1 still chooses 220 microfarads) here, make the biphase current amplitude equal as far as possible, the biphase current phase difference is as far as possible near 90 degree simultaneously.Fig. 7 is the current waveform of single-phase permanent generator belt power factor two-phase armature winding when being the 15kW load of 0.8 hysteresis quality, and wherein solid line is the A phase current waveform, and dotted line is the B phase current waveform.Though this moment, the two-phase armature supply can not synthesize desirable circular magnetic field, can synthesize approaching as far as possible circular oval magnetic field, what also the pulsating magnetomotive force that produces than single-phase winding current will be good is many, has weakened the influence in negative phase-sequence magnetic field.
Embodiment two
The whole generator structure is with embodiment 1 in the present embodiment, but the A of 4 utmost points, 24 grooves, B two-phase armature winding adopt double-deck short distance distributed winding, and further reduced harmonic magnetic field is to the influence of induced electromotive force.As shown in Figure 1, place A, the B two-phase armature winding G5 of mutual deviation 90 degree electrical degrees among the stator core G8.Wherein the distribution schematic diagram of the mutually double-deck short distance distributed winding of A as shown in Figure 8, every extremely every phase groove number is 3, the winding pitch number is 5, promptly the first limit of first coil is placed in No. 1 groove of stator core G8, trailing edge is placed in No. 6 grooves, the rest may be inferred by analogy for it.Groove number is (1,2,3,7,8,9,13,14,15,19, place the first limit (limit, upper strata) of each coil of A phase winding in the stator slot 20,21), (6,7,8,12,13,14,18,19,20,24,1, the 2) trailing edge (lower floor limit) of corresponding each coil of placement A phase winding in number stator slot; Groove number is (4,5,6,10,11,12,16,17,18,22, place the first limit (limit, upper strata) of each coil of B phase winding in the stator slot 23,24), (9,10,11,15,16,17,21,22,23,3,4, the 5) trailing edge (lower floor limit) of each coil of placement B phase winding in number stator slot.Per three coils series connection constitutes a coil groups, and 4 coil groups of each phase are in series and constitute a phase armature winding.
The selection of series capacitance and method of attachment are with embodiment 1 in the connected mode of the A in the present embodiment, B two-phase armature winding and the B phase winding.
Embodiment three
The whole generator structure is with embodiment 1 in the present embodiment, but the two-phase armature winding of 4 utmost points, 36 grooves adopts fractional slot winding, further weakens the influence of teeth groove harmonic field to induced electromotive force in the armature winding.As shown in Figure 1, place A, the B two-phase armature winding G5 of mutual deviation 90 degree electrical degrees among the stator core G8.Wherein the distribution schematic diagram of A phase fraction groove winding as shown in Figure 9, every extremely every phase groove number is
For example there are continuous 4 grooves to belong to the A phase winding extremely down, then under consecutive roots, have 5 grooves to belong to the A phase winding at one.The winding pitch number is 7, and promptly the first limit of first coil is placed in No. 1 groove of stator core G8, and trailing edge is placed in No. 8 grooves, and the rest may be inferred by analogy for it.Groove number is (1,2,3,4,10,11,12,13,14,19,20,21,22,28, place the first limit (limit, upper strata) of each coil of A phase winding in the stator slot 29,30,31,32), (8,9,10,11,17,18,19,29,21,26,27,28,29,35,36,1,2, the 3) trailing edge (lower floor limit) of corresponding each coil of placement A phase winding in number stator slot.Per four or coil groups of five adjacent windings series connection formations, above-mentioned 4 coil groups are in series and constitute A phase armature winding.
The distribution schematic diagram of B phase fraction groove winding as shown in figure 10, groove number is (5,6,7,8,9,15,16,17,18,23,24,25,26,27,33, place the first limit (limit, upper strata) of each coil of B phase winding in the stator slot 34,35,36), (12,13,14,15,16,22,23,24,25,30,31,32,33,34,4,5,6, the 7) trailing edge (lower floor limit) of corresponding each coil of placement B phase winding in number stator slot.Per four or coil groups of five adjacent windings series connection formations, above-mentioned 4 coil groups are in series and constitute B phase armature winding.
The selection of series capacitance and method of attachment are with embodiment 1 in the connected mode of the A in the present embodiment, B two-phase armature winding and the B phase winding.
Claims (2)
1. the single-phase permanent synchronous generator that moves is held in a crosstalk, its main components comprises by end cap (G3), casing (G9), rotating shaft (G1), p-m rotor iron core (G4), permanent magnetic steel (G6), stator core (G8) and the magneto alternator of armature winding (G5) formation and external series operation electric capacity, it is characterized in that:
Place the quadrature armature winding (G5) that two-phase spatially differs 90 degree electrical degrees in the-permanent magnet generator machine stator (G8);
The armature winding of-two-phase mutually orthogonal (G5) has identical winding distribution form and parameter, can adopt the distributed winding of individual layer, double-deck distributed winding or Sine distribution winding;
-rotor of permanent-magnetic power generator adopts surperficial magnet steel structure or built-in magnet steel structure.
2. generator as claimed in claim 1 is characterized in that, phase winding that electromotive force lags behind in the described generator and external operation capacitances in series are then with the leading phase winding parallel connection of electromotive force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206221109U CN201860238U (en) | 2010-11-22 | 2010-11-22 | Single-phase permanent magnet synchronous generator with operating serial capacitors |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206221109U CN201860238U (en) | 2010-11-22 | 2010-11-22 | Single-phase permanent magnet synchronous generator with operating serial capacitors |
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| CN201860238U true CN201860238U (en) | 2011-06-08 |
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| CN2010206221109U Expired - Fee Related CN201860238U (en) | 2010-11-22 | 2010-11-22 | Single-phase permanent magnet synchronous generator with operating serial capacitors |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064648A (en) * | 2010-11-22 | 2011-05-18 | 华北电力大学 | Series capacitors-running single phase permanent magnet synchronous generator |
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- 2010-11-22 CN CN2010206221109U patent/CN201860238U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064648A (en) * | 2010-11-22 | 2011-05-18 | 华北电力大学 | Series capacitors-running single phase permanent magnet synchronous generator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20181122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |