CN201985720U - Electric excitation part double-stator brushless hybrid excitation synchronous generator - Google Patents
Electric excitation part double-stator brushless hybrid excitation synchronous generator Download PDFInfo
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- CN201985720U CN201985720U CN2010206009651U CN201020600965U CN201985720U CN 201985720 U CN201985720 U CN 201985720U CN 2010206009651 U CN2010206009651 U CN 2010206009651U CN 201020600965 U CN201020600965 U CN 201020600965U CN 201985720 U CN201985720 U CN 201985720U
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Abstract
The utility model relates to an electric excitation part double-stator brushless hybrid excitation synchronous generator, which consists of a permanent magnet synchronous motor part (17) and an electric excitation part (18), wherein magnetic paths of the two parts are independent of each other; an armature winding (5) is arranged in a permanent magnet part stator core (9) and an electric excitation part outer stator core respectively; the electric excitation part comprises an outer stator core (12) and an inner stator core (11); and a three-phase or multi-phase excitation winding (10) is arranged in the inner stator core (11). Electromotive force and phase of electric excitation in the armature winding (5) are adjusted by changing current and phase in the excitation winding (10) through a frequency converter, so that the aim of changing total electromotive force and output voltage is fulfilled. Since no gap is formed on the electric excitation part, magnetomotive force required by the electric excitation is low, and magnetic field adjusting efficiency is high. Irreversible demagnetization is not caused to a permanent magnet by the magnetomotive force of the electric excitation, and brushless alternating current excitation is adopted, so that the motor has high reliability.
Description
Technical field
The utility model 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, 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 is that permanent magnetic field is still as the main field of motor, the electricity 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 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, by 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 the output voltage sine 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 by 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 by 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, regulate motor gas-gap total magnetic flux size by the current amplitude and the direction that change in the magnetic field control winding, reach the purpose that changes the induced potential size.
The utility model content
At the deficiency that above-mentioned prior art exists, the utility model 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 utility model 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, two-part induced electromotive force superposes in armature winding.In electric excitation partial stator, increase by a cover internal stator iron core, both provided path for electricity excitation magnetic field and armature field, can place electric excitation winding again as inner yoke.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, electric excitation efficiency height; 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 traditional surperficial 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 harmonic content in the armature winding electromotive force by 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 is 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, design by the excitation winding distribution form, the resultant magnetic field harmonic wave that guarantees the exciting current generation is as much as possible little, and 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 heterogeneous magnetic is around wherein wherein mutually a dead in line of axis and threephase armature winding of a phase of 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 utility model compared with prior art has following characteristics:
1. electric excitation partly adopts the AC excitation of Frequency Converter Control, by 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, electric excitation efficiency height.
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 height of motor.
5. under the certain situation of electro-magnetic motor maximum saturation degree,, can change the adjustable range of generator output voltage by designing electric excitation and permanent magnetism part length ratio unshakable in one's determination.
6. by 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 utility model is elaborated:
Fig. 1 is the brushless mixed excitation synchronous generator axial section schematic diagram of the two stators of electric excitation part;
Fig. 2 is the brushless mixed excitation synchronous generator permanent magnetism partial cross section schematic diagram 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 schematic diagram of the two stators of electric excitation part;
Fig. 5 is the brushless mixed excitation synchronous generator electricity excitation internal stator iron core punching schematic diagram of the two stators of electric excitation part;
Fig. 6 is the brushless mixed excitation synchronous generator electricity excitation external stator iron-core lamination schematic diagram of the two stators of electric excitation part.
Reference numeral:
The 1-rotating shaft, 2-bearing, 3-end cap, 4-permanent magnet machine rotor iron core, 5-armature winding, 6-permanent magnetic steel, 7-magneto air gap, the non-magnetic conduction screw of 8-stainless steel, 9-permanent magnet motor stator iron core, 10-electricity excitation winding, 11-electricity excitation internal stator iron core, 12-electricity excitation external stator iron core, the 13-casing, 14-O grommet type seal circle, 15-fan, the 16-fan guard, 17-magneto alternator part, 18-electric excitation generator part.
Embodiment
As shown in Figure 1, the brushless hybrid exciting synchronous motor of the two stators of electric excitation part of the present utility model is made up of the magneto alternator 17 on the left side and the electric excitation generator part 18 on the right, and coaxial being arranged in juxtaposition is 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 iron core 12, and present embodiment is 36 grooves, and as shown in Figure 4, 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 iron core 4, and shown in Fig. 2,3, rotor core 4 is that two No. ten steel process.
The one electric excitation internal stator iron core 11 that is formed by silicon steel plate stacking is arranged in electric excitation external stator iron core 12, and additional air gap has identical teeth groove number between electric excitation internal stator iron core 11 and the electric excitation external stator iron core 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, simultaneously a depression is arranged on the corresponding teeth of electric excitation external stator iron core 12, as shown in Figure 6, realize the fixing of electric excitation internal stator 11 circumferencial directions.Not additional air gap between electricity excitation internal stator iron core 11 and the external stator iron core 12.
In order to guarantee the normal operation of generator, as shown in Figure 1, alternator shaft 1 supports by two bearings 2 at two ends, 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).At the faying face place of electric generator casing 13 and two ends end cap 3, seal 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 utility model is as follows: 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 is usually above rated voltage, in the electric excitation winding of three-phase (or heterogeneous), feed the AC excitation electric current this moment, the size and the phase place of control exciting current, make the exciting current resultant magnetic field spatially opposite with permanent magnetic field phase place (direction), be that the exciting current resultant magnetic field is on the parallel lines of permanent magnetism magnetic pole axis, but direction and permanent magnetic field are opposite, thereby the electric excitation electromotive force that in the electric excitation part of armature winding, produces and the electromotive force antiphase of permanent magnetism part, 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, does not need to provide electric exciting current this moment, be that exciting current is zero, output voltage maintains near the rated voltage.
When generator loading continues to increase, it is big that armature supply becomes, the motor impedance drop further increases, make output voltage be lower than rated voltage, need to regulate exciting current size and phase place this moment, 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, thereby the electromotive force same-phase of electromotive force that electricity excitation magnetic field is responded in armature winding and permanent magnetic field induction, synthetic electromotive force in the armature winding is greater than the Permanent Magnet and Electric kinetic potential, and exciting current has been equivalent to increase magnetic action, and output voltage continues to maintain near the rated voltage.
Claims (3)
1. the brushless mixed excitation synchronous generator of the two stators of electric excitation part, magneto alternator part (17) that its main components comprises end cap (3), casing (13), be made of rotating shaft (1), permanent magnet machine rotor iron core (4), permanent magnetic steel (6), permanent magnet motor stator iron core (9) and armature winding (5) and the electric excitation generator that is made of electric excitation internal stator iron core (11), electric excitation external stator iron core (12), excitation winding (10) and armature winding (5) be (18) partly, it is characterized in that:
-described 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-described two parts has identical winding distribution form, and by armature winding (5) two parts is connected on circuit;
-permanent magnet machine rotor adopts surperficial magnet steel structure or built-in magnet steel structure;
-described permanent magnet motor stator iron core (9) has identical teeth groove number with electric excitation external stator iron core (12), and stator poles/groove cooperates the traditional distributed winding of employing.
2. generator as claimed in claim 1 is characterized in that, does not have air gap between described electric excitation internal stator iron core (11) and the electric excitation external stator iron core (12).
3. generator as claimed in claim 1 or 2 is characterized in that, described electric excitation internal stator iron core (11) and electric excitation external stator iron core (12) have identical or different teeth groove number; Embed three-phase or heterogeneous electric excitation winding (10) in internal stator iron core (11), described electric excitation winding (10) can have identical distribution form with armature winding (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206009651U CN201985720U (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double-stator brushless hybrid excitation synchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206009651U CN201985720U (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double-stator brushless hybrid excitation synchronous generator |
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| Publication Number | Publication Date |
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| CN201985720U true CN201985720U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206009651U Expired - Fee Related CN201985720U (en) | 2010-11-08 | 2010-11-08 | Electric excitation part double-stator brushless hybrid excitation synchronous generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005879A (en) * | 2010-11-08 | 2011-04-06 | 华北电力大学 | Electric excitation part double stator brushless mixed excitation synchronous generator |
| CN103595212A (en) * | 2013-10-17 | 2014-02-19 | 泰豪科技股份有限公司 | Mixed magnetic power frequency power generator |
-
2010
- 2010-11-08 CN CN2010206009651U patent/CN201985720U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005879A (en) * | 2010-11-08 | 2011-04-06 | 华北电力大学 | Electric excitation part double stator brushless mixed excitation synchronous generator |
| CN102005879B (en) * | 2010-11-08 | 2012-08-29 | 华北电力大学 | Electric excitation part double stator brushless mixed excitation synchronous generator |
| CN103595212A (en) * | 2013-10-17 | 2014-02-19 | 泰豪科技股份有限公司 | Mixed magnetic power frequency power generator |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110921 Termination date: 20141108 |
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| EXPY | Termination of patent right or utility model |