CN102355107A - Integral salient pole intermediate frequency brushless synchronous generator - Google Patents
Integral salient pole intermediate frequency brushless synchronous generator Download PDFInfo
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- CN102355107A CN102355107A CN2011102888061A CN201110288806A CN102355107A CN 102355107 A CN102355107 A CN 102355107A CN 2011102888061 A CN2011102888061 A CN 2011102888061A CN 201110288806 A CN201110288806 A CN 201110288806A CN 102355107 A CN102355107 A CN 102355107A
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Abstract
The invention provides an integral salient pole intermediate frequency brushless synchronous generator. The generator comprises a main generator, an exciter and an excitation regulating system, wherein the excitation adjusting system comprises a compound excitation device, a rotating rectifier and an AVR (automatic voltage regulator); the compound excitation device comprises compound windings, compound converters and a three-phase rectifier bridge; a stator of the main generator adopts a fractional slot short pitch winding; the number of slots per pole per phase q is a fraction value; a rotor core of the main generator is formed by lamination of multipole punched rotor core plates and is in an integral salient pole rotor core structure; the rotor core is formed by punching and laminating the integral punched rotor core plates; and each punched rotor core plate is formed in such a manner that magnetic poles and magnetic yokes are manufactured into an integer and quadrilateral axial ventilation cooling holes are arranged on the magnetic yokes. The generator can realize brushless exciting intermediate frequency generation and output single-phase or three-phase intermediate frequency voltage and has the advantages of excellent performances, stable and reliable work and high output power.
Description
(1) technical field
The present invention relates to a kind of intermediate frequency generator, especially a kind of in powerful overall salient type mid-frequency synchronous generators with brushless.
(2) background technology
At present; More and more on the market to the demand of intermediate frequency generator, as national defense facility and national economy association area need intermediate frequency power supply, airport for safeguard and maintenance cabin instrument and the portable intermediate frequency power supply of equipment needs, industry smelt need be with intermediate frequency power supply of 400Hz and higher frequency or the like.
Existing intermediate frequency power supply is often obtained through frequency conversion by power frequency supply; Power frequency supply is that the generating frequency of common generator is generally 50HZ or 60HZ; For obtaining intermediate frequency power supply; Just need frequency conversion equipment and auxiliary equipment, the shortcoming of its existence is: the one, and investment is big, and equipment investment is much larger than a generator; Cost is high; The facility link is many, and maintenance workload that brings and failure rate are also many, and maintenance cost is high; The 2nd, make the stability of system lower through frequency conversion; The 3rd, the generator amature iron core generally adopts traditional split salient pole rotor unshakable in one's determination; It by every independently pole core punching closed assembly become pole core after the magnetic pole screw radially fixing and locking on rotor yoke; Complex structure not only; Manufacturing process is many, inconvenient installation, poor reliability; Cost is high; And the area of dissipation coefficient is little, and cooling effect is poor, causes the generator amature winding temperature rise high; The 4th, existing intermediate frequency generator power is less, and powerful intermediate frequency generator is not reported in 500kw～1000kW.
Mostly traditional small-sized intermediate frequency generator is magneto, and rotor magnetic pole or magnetic pole of the stator are permanent-magnet steel, also have weak point: the one, magnetic pole does not have winding, has no way of regulating exciting current, thus generator voltage be in can't adjustment state; The 2nd, the permanent-magnet steel that has under hot environment, move or the mal-condition such as top shake etc. of transporting for long-distance under, the possibility of demagnetization is gradually arranged, influence the stability of generator voltage; The 3rd, medium-sized or above power motor root diameter is big, centrifugal force is big, extremely difficult installing magnet steel.
(3) summary of the invention
The objective of the invention is to provide a kind of in powerful overall salient type mid-frequency synchronous generators with brushless; This synchronous generator function realizes the generating of brushless excitation intermediate frequency; Export single-phase or three-phase voltage of intermediate frequency; Not only have rational in infrastructure, in light weight, the advantage that cost is low; And the advanced person that possesses skills; Function admirable, working stability is reliable, the remarkable advantage that power output is big.
The present invention constitutes like this; It comprises the main generator that is installed on the main shaft; With the coaxial mounted exciter of main generator; Excitation control system and air draft cooling fan; On described main generator, be provided with stator core; Rotor core; Stator intermediate frequency winding and rotor winding; On described exciter, be provided with stator core; Armature rotor is unshakable in one's determination; Stator master excitation winding and armature rotor winding; It is characterized in that: described excitation control system is by the compound excitation device; Rotating rectifier and AVR automatic voltage regulator are formed; Described compound excitation device is by the compound winding that is fixed on the exciter stator; The compound excitation current transformer that links to each other with this compound winding constitutes with the three-phase commutation bridge group that is connected on the compound excitation current transformer; Thereby make main generator rotor exciting current and exciter stator exciting current all be in the controllable adjustment state; Described main generator unit stator adopts fractional-slot short distance winding; It is a fractional value that its every extremely every phase groove is counted q; Can obtain desirable sine voltage waveform; Described main generator rotor iron core is formed by the rotor-core lamination closed assembly of multipole number; Described main generator rotor iron core is an overall salient type rotor core structure; This overall salient type rotor core is to be formed by rotor-core lamination full wafer punching out closed assembly; All magnetic poles on the said every rotor-core lamination and yoke are a monolithic construction (being that every rotor-core lamination is that magnetic pole and yoke are processed an integral body); Described magnetic pole is evenly distributed on place, rotor hub outer and outwards protrudes; Promptly be positioned at each magnetic pole interpolar at described yoke outer place and offer polygon (like quadrangle) axial ventilation cooling holes, to form the axial ventilation road that the air inducing cooling fan that can utilize the generator end directly cools off the rotor winding.
Technical characterictic of the present invention can also further be specially:
The input of described rotating rectifier (exchanging end) links to each other with exciter rotor armature winding; Output (dc terminal) links to each other with the main generator rotor winding; Described AVR automatic voltage regulator is provided with low-frequency protection circuit link, voltage stability circuit link, parallel running and transfers difference circuit link and the voltage circuit link of adjusting, and on described AVR automatic voltage regulator, is connected with main generator unit stator tapping wire turn, exciter stator master excitation winding respectively and transfers the difference instrument transformer.When this underfrequency protection link is lower than protection dot frequency lower limit in generator speed, the super large exciting current can occur and burn winding.
In the stator slot of said main generator, be distributed with stator three-phase intermediate frequency winding, or be distributed with the single-phase intermediate frequency winding of stator.
Unshakable in one's determination and the exciter stator iron core of described main generator rotor is to have the iron-core lamination closed assembly of sheet metal punching out of remanent magnetism function again by existing good magnetization property to form, and makes this intermediate frequency brushless excitation synchronous generator have main generator rotor and the dual remanent magnetism of exciter stator magnetic field.
Said main generator rotor number of poles can be respectively 16,24,32,40 utmost points.
The axial ventilation cooling holes of offering in place, said yoke outer is tetragonal axial ventilation cooling holes.
Operation principle process of the present invention is following: this mid-frequency synchronous generators with brushless main generator rotor under the driving of engine rotates near rated speed; And drive exciter rotor armature rotation; Since the dissection in main generator rotor magnetic field and exciter stator magnetic field make the stator winding U that is embedded in the main generator unit stator core slots, V mutually the tap wire turn induce voltage; Rectification link in the AVR automatic voltage regulator becomes direct current with AC rectification then; Input exciter stator master Exciting Windings for Transverse Differential Protection; Set up exciter main field at the exciter stator iron core this moment; The exciter rotor armature winding of rotation just induces three-phase alternating voltage; This three-phase alternating voltage is rectified into DC voltage through three-phase rotary rectifier bridge group; Import the main generator rotor winding again; Thereby set up the main generator rotor main field; Make the main generator unit stator winding induce the three-phase voltage of intermediate frequency, output three-phase intermediate frequency electric energy.Regulate the potentiometer in the AVR automatic voltage regulator, just can adjust the terminal voltage of generator at rated value.
When load; Because the variation of load can cause the variation of generator voltage; Control realization so keep the constant of terminal voltage through AVR automatic voltage regulator and compound excitation device: 1, the exciter excitation electric current is automatically adjusted by the AVR automatic voltage regulator; The exciting current of being defeated by the main generator rotor winding through rotary rectifier by the three-phase voltage of exciter armature induction has also obtained automatic adjusting, thereby the voltage of having kept synchronous generator keeps substantially constant.2, regulate the terminal voltage of synchronous generator by the compound excitation device; When generator loading increase or impact; Compound excitation current transformer pair side electric current in the compound excitation device also increases; Then through input exciter compound winding after the rectification of three-phase commutation bridge group; The stator field of exciter is strengthened simultaneously, thereby help the terminal voltage of synchronous generator to go up rapidly; When generator loading minimizing or prominent getting rid of, the compound excitation effect of compound excitation device weakens, and the terminal voltage of synchronous generator is also fallen after rise rapidly.Therefore, the compound excitation effect of compound excitation device has improved brushless generator dynamic property (comprise transient state pressure regulating performance, voltage recovery time and start the dynamic power machine ability).
Than existing intermediate frequency generator, the present invention has following advantage:
1, because main generator unit stator of the present invention adopts fractional-slot short distance winding, obtain the breadth coefficient of suitable multiple-grooved with less groove number, so can effectively weaken the harmonic wave electromotive force in the winding, improve voltage waveform, thereby make generator voltage quality height.
2, owing to adopt the mode of brushless excitation, so radio interference is minimum, working stability is reliable, and maintenance workload is few.
3, because the main generator rotor iron core is an overall salient type rotor core structure; And be provided with the axial ventilation cooling holes; So not only can save the material of iron core, winding; Reduce weight and volume; And rotor core is firm, winding is solid, radiating condition is good; Rotor winding temperature rise measured value is than the low 20-25K of standard value, thereby makes the generator long service life.
4, because main generator rotor iron core of the present invention and exciter stator are unshakable in one's determination adopts existing good magnetization property to have the iron-core lamination closed assembly of sheet metal punching out of remanent magnetism function again to form, set up voltage so under various environmental conditions, all can reliably encourage oneself.
5, because the present invention adopts AVR automatic voltage regulator and compound excitation structure to keep the constant of terminal voltage, so it is reliable to have a working stability, the remarkable advantage that dynamic property is good.
6, advanced technology of the present invention; It adopts the high specific electric load of Electromagnetic Design new technology, high magnetic flux density, the close i.e. principle of " two high is low " of low stator electricity; Not only make the stator and rotor core length shorten; Save the material of iron core, winding, structure; Make cost lower, and the temperature rise of stator winding is effectively controlled.
7, the number of poles of generator of the present invention can be respectively 16,24,32,40 utmost points, and number of poles is many, and scope is wide; Frequency is 300～600Hz; Be applicable to the demand of various places to intermediate frequency power supply, power can reach 500～1000kW, become at present desirable in high-power even powerful intermediate frequency generating equipment.
8, in addition; The present invention also has rational in infrastructure; Lightweight advantage; It connects with internal combustion engine forms generating set or mobile power station; Can use AC power commonly used or emergency standby power as communication, power or the illumination of national defense facility, aircraft airport, post and telecommunications, ships, smelting factories and miness; So have remarkable social benefit and economic benefit, be convenient to utilization and extention.
(4) description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the circuit working schematic diagram that the present invention exports three-phase voltage.
Fig. 3 is that the number of poles of main generator overall salient type rotor-core lamination is the structural representation of 24 utmost points.
Among the figure; 1 is main generator; 2 is exciter; 3 is rotating rectifier; 4 is the stator core of exciter, and 5 is the armature rotor iron core of exciter, and 6 is the main excitation winding of exciter; 7 is the armature rotor winding of exciter; 8 is compound winding, and 9 is the compound excitation current transformer, and 10 is the three-phase commutation bridge group; 11 is the rotor core of main generator; 12 is the stator core of main generator, and 13 is the rotor winding of main generator, and 14 is the stator winding of main generator; 15 is the rotor-core lamination of main generator; 16 is the magnetic pole of rotor-core lamination, and 17 is the yoke of rotor-core lamination, and 18 is the quadrangle axial ventilation cooling holes of rotor-core lamination yoke; 19 is the AVR automatic voltage regulator, and 20 for transferring the difference instrument transformer.
(5) embodiment
With reference to accompanying drawing; The embodiment of the invention comprises the main generator 1 that is installed on the main shaft; With main generator 1 coaxial mounted exciter 2; Excitation control system and air draft cooling fan; On described main generator 1, be provided with stator core 12; Rotor core 11; Stator intermediate frequency winding 14 and rotor winding 13; On described exciter 2, be provided with stator core 4; Armature rotor unshakable in one's determination 5; Stator master excitation winding 6 and armature rotor winding 7; It is characterized in that: described excitation control system is by the compound excitation device; Rotating rectifier 3 is formed with AVR automatic voltage regulator 19; Described compound excitation device is by the compound winding 8 that is fixed on the exciter stator; The compound excitation current transformer 9 that links to each other with this compound winding constitutes with the three-phase commutation bridge group 10 that is connected on the compound excitation current transformer; Thereby make main generator rotor exciting current and exciter stator exciting current all be in the controllable adjustment state; Described main generator unit stator 12 adopts fractional-slot short distance winding 14; It is a fractional value that its every extremely every phase groove is counted q; Its effect is to obtain considerable breadth coefficient with less number of stator slots; Effectively weaken the harmonic wave electromotive force in the winding induced potential; Obtain desirable sine voltage waveform; Described main generator rotor 11 rotor-core lamination 15 closed assemblies by multipole number unshakable in one's determination form; Described main generator rotor unshakable in one's determination 11 is an overall salient type rotor core structure; This overall salient type rotor core is to be formed by rotor-core lamination 15 full wafer punching out closed assemblies; Described every rotor-core lamination 15 is that magnetic pole 16 and yoke 17 are processed an integral body; Described magnetic pole 16 is evenly distributed on the rotor hub outer edge part and outwards protrudes; Be positioned at each magnetic pole 16 interpolar in described yoke 17 and offer quadrangle axial ventilation cooling holes 18; When installing and using because the effect of air draft cooling fan; The generating function forms rotor winding 7; The 13 axial ventilation roads that directly cool off; Thereby make rotor core 5; 11 is firm, and radiating condition is good.
The input of above-mentioned rotating rectifier 3 (exchanging end) is connected with exciter 2 armature rotor windings 7, and output (dc terminal) is connected with main generator 1 rotor winding 13.Above-mentioned AVR automatic voltage regulator 19 is provided with low-frequency protection circuit link, voltage stability circuit link, parallel running and transfers difference circuit link and the voltage circuit link of adjusting.When this low-frequency protection circuit link is lower than protection dot frequency lower limit in generator speed, the super large exciting current can occur and burn winding.On above-mentioned AVR automatic voltage regulator 19, be connected with main generator 1 stator winding 14 tap wire turns, exciter 2 stator master excitation winding 6 respectively and transfer difference instrument transformer 20.Transfer difference instrument transformer 20 to transfer the difference circuit link to be connected, when being used for 2 or many main generator parallel runnings, can regulating reactive current automatically, thereby realize the distribution automatically in proportion of each generator reactive power with the parallel running of AVR automatic voltage regulator 19.
In the stator slot of above-mentioned main generator 1, be distributed with stator three-phase intermediate frequency winding 14, or be distributed with the single-phase intermediate frequency winding 14 of stator, thereby realize that output voltage is single-phase or three-phase voltage.
1 rotor core 11 of above-mentioned main generator and exciter 2 stator cores 4 are to have the iron-core lamination closed assembly of Q235-A sheet metal punching out of remanent magnetism function again by existing good magnetization property to form; Make this intermediate frequency brushless excitation synchronous generator have main generator rotor and the dual remanent magnetism of exciter stator magnetic field, it can reliably be encouraged oneself under various environmental conditions and set up voltage.
Above-mentioned main generator 1 rotor number of poles can be respectively 16,24,32,40 utmost points, so the generator number of poles of manufacturing of the present invention also is respectively 16,24,32,40 utmost points, number of poles is many, and scope is wide.
The axial ventilation cooling holes of offering in place, said yoke outer is tetragonal axial ventilation cooling holes.
Of the present invention do not state the part identical with prior art.
Claims (6)
1. overall salient type mid-frequency synchronous generators with brushless; Comprise the main generator that is installed on the main shaft; With the coaxial mounted exciter of main generator; Excitation control system and air draft cooling fan; On described main generator, be provided with stator core; Rotor core; Stator intermediate frequency winding and rotor winding; On described exciter, be provided with stator core; Armature rotor is unshakable in one's determination; Stator master excitation winding and armature rotor winding; It is characterized in that: described excitation control system is by the compound excitation device; Rotating rectifier and AVR automatic voltage regulator are formed; Described compound excitation device is by the compound winding that is fixed on the exciter stator; The compound excitation current transformer that links to each other with this compound winding constitutes with the three-phase commutation bridge group that is connected on the compound excitation current transformer; Described main generator unit stator adopts fractional-slot short distance winding; It is a fractional value that its every extremely every phase groove is counted q; Described main generator rotor iron core is formed by the rotor-core lamination closed assembly of multipole number; Described main generator rotor iron core is an overall salient type rotor core structure; This overall salient type rotor core is to be formed by rotor-core lamination full wafer punching out closed assembly; All magnetic poles on the said every rotor-core lamination and yoke are a monolithic construction; Be that every rotor-core lamination is that magnetic pole and yoke are processed an integral body; Described magnetic pole is evenly distributed on place, rotor hub outer and outwards protrudes; Promptly be positioned at each magnetic pole interpolar at described yoke outer place and offer polygon axial ventilation cooling holes, to form the axial ventilation road that the air draft cooling fan that can utilize the generator end directly cools off the rotor winding.
2. overall salient type mid-frequency synchronous generators with brushless according to claim 1; It is characterized in that: the input of described rotating rectifier links to each other with exciter rotor armature winding; Output links to each other with the main generator rotor winding; Described AVR automatic voltage regulator is provided with low-frequency protection circuit link, voltage stability circuit link, parallel running and transfers difference circuit link and the voltage circuit link of adjusting, and on described AVR automatic voltage regulator, is connected with main generator unit stator tapping wire turn, exciter stator master excitation winding respectively and transfers the difference instrument transformer.
3. overall salient type mid-frequency synchronous generators with brushless according to claim 1 is characterized in that: in the stator slot of said main generator, be distributed with stator three-phase intermediate frequency winding, or be distributed with the single-phase intermediate frequency winding of stator.
4. overall salient type mid-frequency synchronous generators with brushless according to claim 1 is characterized in that: the unshakable in one's determination and exciter stator iron core of described main generator rotor is to have the iron-core lamination closed assembly of sheet metal punching out of remanent magnetism function again by existing good magnetization property to form.
5. overall salient type mid-frequency synchronous generators with brushless according to claim 1 is characterized in that: said main generator rotor number of poles can be respectively 16,24,32,40 utmost points.
6. overall salient type mid-frequency synchronous generators with brushless according to claim 1 is characterized in that: the polygon axial ventilation cooling holes of offering in place, said yoke outer is tetragonal axial ventilation cooling holes.
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| CN2011102888061A CN102355107A (en) | 2011-09-21 | 2011-09-21 | Integral salient pole intermediate frequency brushless synchronous generator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904516A (en) * | 2012-10-24 | 2013-01-30 | 徐峰 | AC brushless synchronous generator with modularized excitation reinforcement system |
| CN103546002A (en) * | 2013-09-25 | 2014-01-29 | 于波 | Efficient variable-speed constant-frequency generator |
| CN104467289A (en) * | 2013-09-12 | 2015-03-25 | 利莱森玛电机科技(福州)有限公司 | Direct-current generator |
| CN104753421A (en) * | 2013-12-28 | 2015-07-01 | 易泰帝传动技术(烟台)有限公司 | Current sampling and calibrating method of DC speed controller |
| US9882518B2 (en) | 2014-07-08 | 2018-01-30 | Generac Power Systems, Inc. | Auxiliary winding for a generator |
| CN107742964A (en) * | 2017-11-20 | 2018-02-27 | 黄舒淳 | A kind of electric variable frequency brushless synchronous generating group |
| CN109995157A (en) * | 2018-01-02 | 2019-07-09 | 法雷奥系统公司 | The rotor and related manufacturing process of rotating electric machine |
| CN110429776A (en) * | 2018-12-26 | 2019-11-08 | 山东德欣电机有限公司 | Double 12 pulse wave double fluid brushless generators |
| CN114465384A (en) * | 2021-12-28 | 2022-05-10 | 黄石东贝电机有限公司 | Refrigerator compressor variable frequency motor rotor made of strip steel |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904516A (en) * | 2012-10-24 | 2013-01-30 | 徐峰 | AC brushless synchronous generator with modularized excitation reinforcement system |
| CN102904516B (en) * | 2012-10-24 | 2014-10-08 | 徐峰 | AC brushless synchronous generator with modularized excitation reinforcement system |
| CN104467289A (en) * | 2013-09-12 | 2015-03-25 | 利莱森玛电机科技(福州)有限公司 | Direct-current generator |
| CN103546002A (en) * | 2013-09-25 | 2014-01-29 | 于波 | Efficient variable-speed constant-frequency generator |
| CN104753421A (en) * | 2013-12-28 | 2015-07-01 | 易泰帝传动技术(烟台)有限公司 | Current sampling and calibrating method of DC speed controller |
| CN104753421B (en) * | 2013-12-28 | 2017-06-27 | 易泰帝传动技术(烟台)有限公司 | A kind of DC speed regulator current sample and calibrating method |
| US9882518B2 (en) | 2014-07-08 | 2018-01-30 | Generac Power Systems, Inc. | Auxiliary winding for a generator |
| CN107742964A (en) * | 2017-11-20 | 2018-02-27 | 黄舒淳 | A kind of electric variable frequency brushless synchronous generating group |
| CN107742964B (en) * | 2017-11-20 | 2023-11-21 | 黄舒淳 | Electric variable-frequency brushless synchronous generator set |
| CN109995157A (en) * | 2018-01-02 | 2019-07-09 | 法雷奥系统公司 | The rotor and related manufacturing process of rotating electric machine |
| CN109995157B (en) * | 2018-01-02 | 2022-03-22 | 法雷奥系统公司 | Rotor for a rotating electrical machine and associated manufacturing process |
| CN110429776A (en) * | 2018-12-26 | 2019-11-08 | 山东德欣电机有限公司 | Double 12 pulse wave double fluid brushless generators |
| CN110429776B (en) * | 2018-12-26 | 2024-03-19 | 山东德欣电机有限公司 | Double 12 pulse wave double flow brushless generator |
| CN114465384A (en) * | 2021-12-28 | 2022-05-10 | 黄石东贝电机有限公司 | Refrigerator compressor variable frequency motor rotor made of strip steel |
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Application publication date: 20120215 |