CN102005879B - Electric excitation part double stator brushless mixed excitation synchronous generator - Google Patents
Electric excitation part double stator brushless mixed excitation synchronous generator Download PDFInfo
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- CN102005879B CN102005879B CN201010538345A CN201010538345A CN102005879B CN 102005879 B CN102005879 B CN 102005879B CN 201010538345 A CN201010538345 A CN 201010538345A CN 201010538345 A CN201010538345 A CN 201010538345A CN 102005879 B CN102005879 B CN 102005879B
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Abstract
The invention relates to an electric excitation part double stator brushless mixed excitation synchronous generator. The generator is composed of a permanent magnet synchronous motor (17) and an electric excitation part (18), magnetic circuits of the two parts are mutually independently, and an armature winding (5) is arranged in a stator core (9) of the permanent magnet part and an outer stator core (12) of the electric excitation part. The electric excitation part is provided with the outer stator core (12) and an inner stator core (11), and a three phase or multiphase exciting winding (10) is placed in the inner stator core (11). Magnitude and phase of current in the exciting winding (10) are changed by virtue of a frequency converter, so as to regulate magnitude and phase of electric excitation electromotive force in the armature winding (5), thus achieving the aim of adjusting total electromotive force and output voltage. The electric excitation part has no air gap, and magnetomotive force required by electric excitation is small, thus field adjustment efficiency is high. The electric excitation magnetomotive force can not cause irreversible demagnetization on permanent magnet, and brushless alternating current excitation is adopted, thus reliability of motor is high.
Description
Technical field
The present invention relates to a kind of hybrid exciting synchronous motor, the brushless mixed excitation synchronous generator of the two stators of particularly a kind of electric excitation part.
Background technology
With respect to traditional electric excitation synchronous motor, permagnetic synchronous motor has advantages such as reliability height, efficient height and volume are little.But magneto is because rotor adopts the permanent magnetic steel excitation, and air-gap field is not easy to regulate, as generator operation; When temperature raise, permanent magnetic steel can produce reversible demagnetization, and generator output voltage is reduced; In addition; When generator loading changed, especially when inductive load increased, output voltage further reduced.Usually the voltage change ratio of permanent magnet generator is about ± 10%, and the reliability service of load equipment is had a negative impact.So hybrid exciting synchronous motor is suggested and carried out a large amount of research; The mixed excitation electric machine that multiple structure occurred; Stacked system by electricity excitation magnetic field and permanent magnetic field can be divided into series excitation formula, shunt excitation formula and mixed reed-type three kinds of structures; Their main thought be permanent magnetic field still as the main field of motor, electric excitation is partly regulated the part that electromotive force need be regulated, thereby has guaranteed the stable of generator output voltage.
Patent of invention (ZL.200310106346.1) has proposed a kind of mixed excitation electric machine of biconvex electrode structure, and it is made up of doubly salient permanent magnet motor and electric excitation biconvex electrode electric machine two parts, and two-part stator winding is contacted mutually.The magnetic circuit magnetic resistance changes during the rotor rotation, through changing excitation winding size of current on the electric excitation partial stator, can regulate the electromotive force of electric excitation part armature winding.But this structure is utilized the reluctance type operation principle, and output voltage sine property is not fine, needs convertor equipment just can obtain high-quality voltage during as generator operation.
Patent of invention (ZL.200310106347.6) has proposed a kind of hybrid exciting synchronous motor of two-stage structure, and motor is divided into permagnetic synchronous motor and electric excitation synchronous motor two parts, and two parts are independent mutually on magnetic circuit, a shared cover stator armature winding.Regulate electric exciting current, i.e. the size of scalable motor powered gesture.But, reduced the reliability and the environmental suitability of motor because exciting current is incorporated into the rotor-exciting winding through brush and slip ring.
(application number: 200810024775.7) announced a kind of hybrid exciting synchronous motor of parallel construction, motor is a two-stage structure, and one section is permagnetic synchronous motor, and another section is the brush-less electrically exciting synchronous machine, two sections coaxial rotations of rotor in patent application.Two sections motors are independent mutually on magnetic circuit, the shared cover armature winding of stator, and the induced electromotive force of two sections motors superposes in armature winding.Can regulate the electromotive force size and the phase place of electric excitation part in the armature winding through the size and Orientation that changes the excitation winding electric current, thereby realize the adjusting of whole armature winding electromotive force.But electric excitation partly adopts the claw-pole motor structure, except working gas gap, also has two sections additional air gaps on the electric magnetic excitation circuit, needs to consume more electric excitation magnetomotive force, has reduced electric excitation efficiency.
Patent of invention (ZL.200510112091.9) has proposed a kind of dual-feeding mixed excitation axial magnetic field magento motor; Motor in axial magnetic field rotor inner ring is as the permanent magnet machine rotor part; The outer ring is electric excitation part; Current amplitude and direction through changing in the magnetic field control winding are regulated motor gas-gap total magnetic flux size, reach the purpose that changes the induced potential size.
Summary of the invention
To the deficiency that above-mentioned prior art exists, the present invention proposes the brushless mixed excitation synchronous generator of the two stators of a kind of electric excitation part.
The brushless mixed excitation synchronous generator of the two stators of electric excitation part of the present invention is divided into magneto and electric excitation structure two parts in same casing; Two parts axially are being arranged in juxtaposition; Independently of one another on magnetic circuit; Two parts stator core is also independently of one another, a shared cover stator armature winding, and two-part induced electromotive force superposes in armature winding.In electric excitation partial stator, increasing by a cover internal stator iron core, had been that electricity excitation magnetic field and armature field provide path as inner yoke both, can place electric excitation winding again.Between electricity excitation winding and the armature winding is the close coupling that is similar between the winding of the former and deputy limit of transformer, and the magnetomotive force that electric excitation needs is few, and electric excitation efficiency is high; Exciting current directly is added on the excitation winding of excitation part internal stator in addition, adopts brushless ac electricity excitation structure, good environmental adaptability.
Permagnetic synchronous motor partly is conventional surface magnet steel or interior permanent magnet machines structure; Stator core is formed by silicon steel plate stacking; Stator poles/groove cooperates the traditional distributed winding of employing even the utmost point/groove ratio of fractional-slot, to reduce the harmonic content in the armature winding electromotive force.P-m rotor further reduces the harmonic content in the armature winding electromotive force through selecting suitable pole embrace or pole form optimization.Electricity excitation external stator is unshakable in one's determination to have identical structure with permanent magnetism partial stator iron core, and just core length can be different, and the shared cover threephase armature winding of electric excitation external stator and permanent magnet motor stator has identical winding distribution form.
Electricity excitation external stator iron core is used for placing armature winding; One internal stator iron core that formed by silicon steel plate stacking is arranged in electric excitation external stator iron core; Do not have air gap between internal stator iron core and the external stator iron core, internal stator iron core and external stator iron core have identical or different teeth groove number.The teeth groove opening of internal stator is on excircle; The internal stator utmost point/groove cooperates the utmost point/groove ratio of the traditional distributed winding of employing, fractional-slot even can embed symmetrical polyphase windings; In the teeth groove of internal stator, embed a cover and armature winding and have three-phase (or heterogeneous) excitation winding of same pole logarithm; Through the design of excitation winding distribution form, guarantee that the resultant magnetic field harmonic wave of exciting current generation is as much as possible little, fundamental wave magnetic field is big as much as possible.If excitation winding is a three-phase, excitation winding axis and armature winding dead in line; If excitation winding is heterogeneous, then wherein wherein mutually a dead in line of axis and threephase armature winding of a phase of multi-phase excitation winding.Enough big air gap is arranged between internal stator iron core and the rotating shaft, do not influence the installation and the rotation of rotor.
The brushless mixed excitation synchronous generator of the two stators of electric excitation part of the present invention compared with prior art has following characteristics:
1. electric excitation partly adopts the AC excitation of Frequency Converter Control, through the size of the symmetrical exciting current of control three-phase (or heterogeneous) and the adjusting of phase place realization motor total electromotive force and output voltage.
2. excitation winding is positioned at the internal stator part of electric excitation part, has realized the non-brushing of excitation, has increased the reliability and the environmental suitability of motor.
3. electric excitation division does not exceptionally have relative rotation relationship between stator core and the internal stator iron core; The electricity magnetic excitation circuit does not exist working gas gap and additional air gap; The coupling of magnetic circuit between excitation winding and the armature winding strengthens, and the required magnetomotive force of electric excitation is few, and electric excitation efficiency is high.
4. because magneto part and electric excitation part are independently of one another on magnetic circuit, regulate electric exciting current, can not cause the irreversible demagnetization of permanent magnet, the reliability of motor is high.
5. under the certain situation of electro-magnetic motor maximum saturation degree,, can change the adjustable range of generator output voltage through designing electric excitation and permanent magnetism part length ratio unshakable in one's determination.
6. through the design of stator armature winding, excitation winding distribution form and p-m rotor field structure, can obtain high-quality generator output voltage.
Description of drawings
Below in conjunction with accompanying drawing the present invention is elaborated:
Fig. 1 is the brushless mixed excitation synchronous generator axial section sketch map of the two stators of electric excitation part;
Fig. 2 is the brushless mixed excitation synchronous generator permanent magnetism partial cross section sketch map of the two stators of electric excitation part;
Fig. 3 is a kind of p-m rotor sectional view of brushless mixed excitation synchronous generator of the two stators of electric excitation part;
Fig. 4 is the brushless mixed excitation synchronous generator electricity excitation division partial cross-section sketch map of the two stators of electric excitation part;
Fig. 5 is the brushless mixed excitation synchronous generator electricity excitation internal stator iron core punching sketch map of the two stators of electric excitation part;
Fig. 6 is the brushless mixed excitation synchronous generator electricity excitation external stator iron-core lamination sketch map of the two stators of electric excitation part.
Reference numeral:
The 1-rotating shaft, the 2-bearing, the 3-end cap, the 4-permanent magnet machine rotor is unshakable in one's determination, 5-armature winding; The 6-permanent magnetic steel, 7-magneto air gap, the non-magnetic conduction screw of 8-stainless steel, the 9-permanent magnet motor stator is unshakable in one's determination, 10-electricity excitation winding; 11-electricity excitation internal stator iron core, 12-electricity excitation external stator is unshakable in one's determination, 13-casing, 14-O grommet type seal circle; The 15-fan, 16-fan guard, 17-magneto alternator part, 18-electric excitation generator part.
Embodiment
Can know by Fig. 1; The brushless mixed excitation synchronous generator of the two stators of electric excitation part of the present invention; Its main components comprises the electric excitation generator part 18 that magneto alternator part 17 that end cap 3, casing 13,, permanent magnetic steel 6 unshakable in one's determination 4 by rotating shaft 1, permanent magnet machine rotor, permanent magnet motor stator unshakable in one's determination 9 and armature winding 5 constitute and, excitation winding 10 unshakable in one's determination 12 by electric excitation internal stator iron core 11, electric excitation external stator and armature winding 5 constitute; The magneto alternator 17 on the left side and electric excitation generator part 18 coaxial being arranged in juxtaposition on the right are installed in the same casing 13.Permanent magnet motor stator unshakable in one's determination 9 has identical teeth groove number with electric excitation external stator unshakable in one's determination 12, and present embodiment is 36 grooves, and is as shown in Figure 4, and just core length can be different, the shared cover threephase armature winding 5 of two parts stator.
P-m rotor adopts surperficial magnet steel structure, and permanent magnetic steel 6 adopts the non-guide screw nail 8 of stainless steel to be fixed on the rotor permanent magnet machine rotor unshakable in one's determination 4, and like Fig. 2, shown in 3, rotor core 4 is that two No. ten steel process.
The one electric excitation internal stator iron core 11 that formed by silicon steel plate stacking is arranged in electric excitation external stator unshakable in one's determination 12, and additional air gap has identical teeth groove number between electric excitation internal stator iron core 11 and the electric excitation external stator unshakable in one's determination 12.Internal stator iron core and armature winding 5 have the three-phase electricity excitation winding 10 of same distribution form, three-phase electricity excitation winding 10 and armature winding 5 deads in line.
On three teeth of electric excitation internal stator iron core 11 cylindricals, a circular projection is arranged respectively, as shown in Figure 5, on the corresponding teeth of electric excitation external stator unshakable in one's determination 12, a depression is arranged simultaneously, as shown in Figure 6, realize the fixing of electric excitation internal stator 11 circumferencial directions.
In order to guarantee the normal operation of generator, as shown in Figure 1, alternator shaft 1 leans on two bearings 2 at two ends to support, and bearing 2 is installed in the bearing pedestal of two ends end cap 3.For the ease of the assembling of p-m rotor, it is big slightly that the air gap 7 of permanent magnet generator part can design, and (certainly for low power generator can design smaller slightly).Faying face place at electric generator casing 13 and two ends end cap 3 seals with O grommet type seal circle 14, to improve the adaptability of generator to humidity even rainwater environment.In order to improve the heat-sinking capability of generator, at the non-shaft stretching end of generator fan 15 and fan guard 16 have been installed, fan 15 is installed in the on-mechanical power input of rotating shaft 1, and generator is carried out wind-cooling heat dissipating.
The operation principle of the brushless mixed excitation synchronous generator of the two stators of electric excitation part of the present invention is following: when feeding the symmetrical alternating current exciting current in the electric excitation winding of three-phase (or heterogeneous); On the space of electric excitation part, form rotating excitation magnetic field; The size of excitation field is relevant with exciting current; Exciting current is big more, and magnetic field is strong more; The space phase in rotating excitation magnetic field is relevant with the phase place of exciting current.Regulate exciting current size and phase place, the i.e. size and the phase place of electric excitation induced electromotive force in the scalable armature winding.
When moving when generator no-load running or than underload; Output voltage feeds the AC excitation electric current this moment, the size and the phase place of control exciting current usually above rated voltage in the electric excitation winding of three-phase (or heterogeneous); Make the exciting current resultant magnetic field spatially opposite with the permanent magnetic field phase place; Be the exciting current resultant magnetic field on the parallel lines of permanent magnetism magnetic pole axis, but direction and permanent magnetic field are opposite, thus the electric excitation electromotive force and permanent magnetism electromotive force antiphase partly that in the electric excitation part of armature winding, produce; Because magneto part electromotive force and electric excitation part induced electromotive force are superimposed in armature winding; So total electromotive force reduces in the armature winding, output voltage maintains near the rated voltage, and the exciting current of this moment has been equivalent to demagnetizing effect.
When generator institute bringing onto load continues to increase; Be armature supply when increasing to a certain numerical value, the electromotive force that permanent magnetism partly produces just balances each other with rated voltage and generator impedance drop, and need not provide electric exciting current this moment; Be that exciting current is zero, output voltage maintains near the rated voltage.
When generator loading continued to increase, it is big that armature supply becomes, and the motor impedance drop further increases; Make output voltage be lower than rated voltage, need this moment to regulate exciting current size and phase place, make synthetic magnetic field of exciting current and magneto magnetic field partly same-phase spatially; Be that the exciting current resultant magnetic field is on permanent magnetism magnetic pole parallel axes line; And direction is identical with permanent magnetic field, thus the electromotive force same-phase of electromotive force that electricity excitation magnetic field is responded in armature winding and permanent magnetic field induction, and the synthetic electromotive force in the armature winding is greater than the Permanent Magnet and Electric kinetic potential; Exciting current has been equivalent to increase magnetic action, and output voltage continues to maintain near the rated voltage.
Claims (1)
1. the brushless mixed excitation synchronous generator of the two stators of electric excitation part; The magneto alternator part (17) that its main components comprises end cap (3), casing (13), be made up of rotating shaft (1), permanent magnet machine rotor (4), permanent magnetic steel (6) unshakable in one's determination, permanent magnet motor stator (9) unshakable in one's determination and armature winding (5) and by the electric excitation generator of electric excitation internal stator iron core (11), electric excitation external stator (12) unshakable in one's determination, excitation winding (10) and armature winding (5) formation partly (18); Excitation winding (10) is positioned on the electric excitation internal stator iron core (11); Electricity excitation internal stator iron core (11) and electric excitation external stator do not have air gap between (12) unshakable in one's determination, it is characterized in that:
-said magneto alternator (17) and electric excitation generator (18) two parts are along axially being installed in the same casing (13), and two parts magnetic circuit is independently of one another;
The shared cover armature winding (5) of-said two parts has identical winding distribution form, and through armature winding (5) two parts is connected on circuit;
-permanent magnet machine rotor adopts surperficial magnet steel structure or built-in magnet steel structure;
-said permanent magnet motor stator (9) unshakable in one's determination has identical teeth groove number with electric excitation external stator (12) unshakable in one's determination, and both length is different, and stator poles/groove cooperates the utmost point/groove ratio that adopts traditional distributed winding fractional-slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538345A CN102005879B (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double stator brushless mixed excitation synchronous generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010538345A CN102005879B (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double stator brushless mixed excitation synchronous generator |
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| CN102005879A CN102005879A (en) | 2011-04-06 |
| CN102005879B true CN102005879B (en) | 2012-08-29 |
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| CN201010538345A Expired - Fee Related CN102005879B (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double stator brushless mixed excitation synchronous generator |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012062018A1 (en) * | 2010-11-08 | 2012-05-18 | 华北电力大学 | Hybrid excitation synchronous generator with coordinate structure and ac excitation control system thereof |
| CN102769422A (en) * | 2011-05-06 | 2012-11-07 | 陈维加 | Hybrid excitation amplitude modulation power generation method and generator of alternating current generator |
| CN102664097B (en) * | 2012-06-06 | 2013-12-11 | 哈尔滨工业大学 | Double-channel axial magnetic circuit outer rotor reluctance type rotary transformer |
| CN102842412B (en) * | 2012-07-30 | 2014-09-03 | 哈尔滨工业大学 | Co-excitation coarse-refined coupling magnetic resistance type rotary transformer |
| CN106026575A (en) * | 2016-07-22 | 2016-10-12 | 佛山市奥力博动力工程有限公司 | Novel hybrid excitation generator |
| CN112087114B (en) * | 2020-08-31 | 2021-08-03 | 江苏大学 | Hybrid excitation double-stator switched reluctance motor |
| CN114785078B (en) * | 2022-06-21 | 2022-09-06 | 宁德时代电机科技有限公司 | Constant-voltage composite electro-magnetic permanent magnet synchronous power frequency water-cooled generator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1146767A1 (en) * | 1982-03-29 | 1985-03-23 | Eliazar Ya Bukhshtaber | Combined synchronous electric machine |
| US5731647A (en) * | 1995-02-21 | 1998-03-24 | Siemens Aktiengesellschaft | Hybrid-energized synchronous electric machine |
| CN1743691A (en) * | 2005-09-26 | 2006-03-08 | 南京航空航天大学 | Low-loss mixed excitation internal rotor radial magnetic-suspension bearing |
| CN101262160A (en) * | 2008-04-16 | 2008-09-10 | 南京航空航天大学 | Mixed excited magnetic pass switching electromotor |
| CN201985720U (en) * | 2010-11-08 | 2011-09-21 | 华北电力大学 | Electric excitation part double-stator brushless hybrid excitation synchronous generator |
-
2010
- 2010-11-08 CN CN201010538345A patent/CN102005879B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1146767A1 (en) * | 1982-03-29 | 1985-03-23 | Eliazar Ya Bukhshtaber | Combined synchronous electric machine |
| US5731647A (en) * | 1995-02-21 | 1998-03-24 | Siemens Aktiengesellschaft | Hybrid-energized synchronous electric machine |
| CN1743691A (en) * | 2005-09-26 | 2006-03-08 | 南京航空航天大学 | Low-loss mixed excitation internal rotor radial magnetic-suspension bearing |
| CN101262160A (en) * | 2008-04-16 | 2008-09-10 | 南京航空航天大学 | Mixed excited magnetic pass switching electromotor |
| CN201985720U (en) * | 2010-11-08 | 2011-09-21 | 华北电力大学 | Electric excitation part double-stator brushless hybrid excitation synchronous generator |
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Granted publication date: 20120829 Termination date: 20171108 |