CN102738985A - Direct grid-tied variable-speed constant-frequency generator - Google Patents
Direct grid-tied variable-speed constant-frequency generator Download PDFInfo
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- CN102738985A CN102738985A CN2012102334243A CN201210233424A CN102738985A CN 102738985 A CN102738985 A CN 102738985A CN 2012102334243 A CN2012102334243 A CN 2012102334243A CN 201210233424 A CN201210233424 A CN 201210233424A CN 102738985 A CN102738985 A CN 102738985A
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- generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
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Abstract
The invention relates to a generator, and particularly relates to a direct grid-tied variable-speed constant-frequency generator. The generator comprises a main shaft, a generator rotor fixedly arranged on the main shaft and a generator stator which is arranged on the periphery of the generator rotor in a surrounding manner, wherein the generator rotor is provided with a generator direct current excitation coil, and the generator stator is provided with a generator armature coil; the generator stator is arranged on the main shaft through a bearing, and the generator rotor is fixedly arranged on the main shaft; an exciter is arranged on the main shaft and comprises an exciter armature shell arranged on the main shaft and an exciter rotor fixedly arranged on the main shaft; the exciter rotor is fixedly provided with an exciter rotor direct current excitation coil; the inner side wall of the exciter armature shell is fixedly provided with an exciter armature, and the outer side wall of the exciter armature is fixedly provided with a main generator rotor winding coil; a main generator armature shell is sleeved on the outer side of the exciter armature shell and is fixedly connected with the generator stator; and the inner side wall of the main generator armature shell is fixedly provided with a main generator stator coil. When the rotating speed of the generator changes, the output voltage frequency of the generator and network frequency are kept same all the time; and the generator disclosed by the invention is compact in structure and simple in production process.
Description
Technical field
The present invention relates to a kind of generator, especially a kind of direct parallel variable-speed constant-frequency generator.
Background technology
The generator of wind-driven generator iso-variable velocity operation is in order to reach the requirement of generating electricity by way of merging two or more grid systems; It is consistent with mains frequency that the electric voltage frequency that need under the situation of different rotating speeds, export keeps; The main mode of rectification-inversion that adopts such as direct-driving type generator, double-fed generator is carried out electronics adjustment output frequency now; Because inverter structure is complicated, failure rate is high, cost is high, has become a big obstacle of wind-force iso-variable velocity generator connecting in parallel with system generating.My another patent application " directly parallel variable-speed constant-frequency generator "; Application number is 2011204233619; A kind of feedback frequency modulation formula generator that comprises main generator, exciter, main generator is disclosed; Adjust the frequency of exciter according to the frequency of power shaft driving main generator rotation and the difference of mains frequency, thereby the output frequency of main generator and electrical network are consistent.But this direct parallel variable-speed constant-frequency generator uses hollow shaft and brush in a large number, and it is complicated to produce assembly technology, and cost is high, failure rate is high.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, produce the direct parallel variable-speed constant-frequency generator that assembly technology is simple, can directly be incorporated into the power networks and need not inverter.
For achieving the above object, the present invention adopts following technical scheme:
A kind of direct parallel variable-speed constant-frequency generator of the present invention comprises main shaft, is fixedly mounted on the generator amature on the main shaft; And around being arranged on generator amature generator unit stator on every side; The generator direct-flow magnet exciting coil is installed on the generator amature, the generator armature coil is installed on the generator unit stator, generator unit stator passes through Bearing Installation on main shaft; Generator amature is fixedly mounted on the main shaft; Generator unit stator becomes air gap to cooperate with generator amature, generator exciter also is installed on main shaft
It is characterized in that:
Described generator exciter comprise through Bearing Installation in the exciter armature case on the main shaft, be fixedly mounted on the exciter rotor on the main shaft; Be installed with the exciter rotor direct-flow magnet exciting coil on the exciter rotor; Be installed with the exciter armature on the madial wall of exciter armature case; The exciter armature becomes air gap to cooperate with exciter rotor; Be installed with the main generator rotor coiled wire-wound coil on the lateral wall of exciter armature case, the outside of exciter armature case is set with the main generator armature case, and the main generator armature case is fixedly connected with generator unit stator; Be installed with the main generator unit stator coil on the madial wall of main generator armature case, said main generator unit stator coil becomes air gap to cooperate with the main generator rotor coiled wire-wound coil; The main generator rotor coiled wire-wound coil is electrically connected with the exciter armature; The magnetic pole logarithm of main generator unit stator coil, exciter rotor direct-flow magnet exciting coil and generator direct-flow magnet exciting coil equates; On each phase line of said generator armature coil and main generator unit stator coil the connector lug that is connected electrical network is arranged; The two ends of said exciter armature case are fixedly connected with two hollow shafts respectively, and main shaft is inserted into through bearing in the inner chamber of a hollow shaft, and this hollow shaft is connected with power shaft, and another hollow shaft sleeve is contained on the main shaft; Two main generator armature case end caps pass through Bearing Installation respectively on two hollow shafts, and the main generator armature case is fixedly connected on the circumference of two main generator armature case end caps; Main shaft is provided with slip ring.
Adopt after the technique scheme, the present invention has following advantage:
1, generator can keep output voltage frequency identical with mains frequency all the time when rotation speed change.
2, when being used for wind power generation, can save rectification-inverter, reliability improves greatly, and cost but declines to a great extent.
3, can adjust idle output current size, the maximum constraints of adjustment active power.
When 4, being used for wind power-generating grid-connected operation, the quality of power supply increases substantially, and can satisfy the specification requirement that low-voltage is passed through.
5, compact conformation, it is simple to produce assembly technology, helps reducing cost and reducing failure rate.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the electrical schematic diagram of one embodiment of the invention.
Embodiment
As shown in Figure 1; A kind of direct parallel variable-speed constant-frequency generator of the present invention comprises main shaft 1, is fixedly mounted on the generator amature 2 on the main shaft 1; And around being arranged on generator amature 2 generator unit stator 3 on every side; Generator direct-flow magnet exciting coil 21 is installed on the generator amature 2, generator armature coil 31 is installed on the generator unit stator 3, generator unit stator 3 passes through Bearing Installation on main shaft 1; Generator amature 2 is fixedly mounted on the main shaft 1, and 2 one-tenth air gaps of generator unit stator 3 and generator amature cooperate.
Generator exciter also is installed on main shaft 1; Described generator exciter comprise through Bearing Installation in the exciter armature case 4 on the main shaft 1, be fixedly mounted on the exciter rotor 5 on the main shaft 1; Be installed with exciter rotor direct-flow magnet exciting coil 51 on the exciter rotor 5; Be installed with exciter armature 41 on the madial wall of exciter armature case 4,5 one-tenth air gaps of exciter armature 41 and exciter rotor cooperate, and are installed with main generator rotor coiled wire-wound coil 71 on the lateral wall of exciter armature case 4; The outside of exciter armature case 4 is set with main generator armature case 7; Main generator armature case 7 is fixedly connected with generator unit stator 3, is installed with main generator unit stator coil 81 on the madial wall of main generator armature case 7, and 71 one-tenth air gaps of said main generator unit stator coil 81 and main generator rotor coiled wire-wound coil cooperate; Main generator rotor coiled wire-wound coil 71 is electrically connected with exciter armature 41; The magnetic pole logarithm of main generator unit stator coil 81, exciter rotor direct-flow magnet exciting coil 51 and generator direct-flow magnet exciting coil 21 equates.
As shown in Figure 2, main shaft 1 is provided with slip ring 9.Said exciter rotor direct-flow magnet exciting coil 51 is wired to respectively on the slip ring 9 with generator direct-flow magnet exciting coil 21; Said main generator rotor coiled wire-wound coil 71 passes through the corresponding electrical connection of lead respectively mutually with each of exciter armature 41, leaves the connector lug that is used to be connected electrical network on each phase line of said generator armature coil 31 and main generator unit stator coil 81.
Said exciter armature case 4 is fixedly connected with hollow shaft 6, and main shaft 1 is inserted into through bearing in the inner chamber of hollow shaft 6, and hollow shaft 6 is connected with power shaft; Main generator armature case end cap 72 passes through Bearing Installation on hollow shaft 6; Said main generator armature case end cap 72 is discoid, and hollow shaft 6 is positioned at its home position, and main generator armature case 7 is fixedly connected on the circumference of main generator armature case end cap 72.
During work, hollow shaft 6 is high speed rotating under the dynamic action externally, and the electrical network that main generator unit stator coil 81 is f1 through main be incorporated into the power networks K switch 1 and frequency is connected, and slip ring passes through brush and is connected with two dc excitation powers.Through slip ring, exciter rotor direct-flow magnet exciting coil 51 obtains adjustable DC excitation electric current separately respectively with generator direct-flow magnet exciting coil 21.Main generator unit stator coil 81 inserts electrical network and on armature, produces a rotating magnetic field; Hollow shaft 6 externally rotates with the speed that is higher than main generator unit stator coil 81 rotating magnetic field rotating speeds under the dynamic action; And at alternating current that slip frequency is f3 of main generator rotor coiled wire-wound coil 71 outputs; This alternating current is added on the exciter armature 41 again and produces the rotating magnetic field of a relative exciter armature case 4; The direction of rotation of direction and exciter armature case 4 is opposite, just in time equals the rotating speed of the rotating magnetic field that main generator unit stator coil 81 produces after these two rotating speeds are synthetic, exciter rotor 5 under this rotating magnetic field drives to rotate with leg speed; Drive main shaft 1 and generator amature 2 rotations again; Because generator and main generator number of pole-pairs equate,, thereby realize variable speed constant frequency generator so generator armature coil 31 produces and the electromotive force f2 of electrical network same frequency.The operation characteristic of main generator is equal to double-fed generator.The operation characteristic of generator is equal to synchronous generator, and can realize the adjustment of reactive power.
The f2 frequency is derived as follows:
Wherein: f1 is a mains frequency; F2 is a generator electromotive force frequency; F3 is an exciter armature supply frequency, also is the wound rotor output voltage frequency.P1 is the main generator rotor number of pole-pairs; P2 is the generator amature number of pole-pairs; P3 is the exciter rotor number of pole-pairs.N1 is the rotating speed of main generator and rotating magnetic field; N2 is the power shaft rotating speed; N3 is the slip of main shaft and hollow shaft; Nc is the rotating speed that the exciter armature exchanges rotating magnetic field, and the direction of rotation of direction and hollow shaft 6 is opposite.
According to the synchronous machine identity, n=60f/p derives as follows:
n1=60f1/p1,
n3=n2-n1
nc=?f3*60/p3
f3=（n2-n1）p1/60
f2=（n2-nc）p2/60
=（n2-?f3*60/p3）p2/60
=（n2-（n2-n1）p1/60*60/p3）p2/60
=（n2-（n2-n1）p1/p3）p2/60
Again because p1=p3
So f2=(n2-n2+n1) p2/60
=?n1*?p2/60
=60f1/p1*?p2/60
=?（p2/?p1）*?f1
Again because p1=p2
So f2=f1.
Promptly when p1=p2=p3, f2=f1 is an identity.So when the number of pole-pairs of main generator unit stator coil 81, exciter rotor direct-flow magnet exciting coil 51 and generator direct-flow magnet exciting coil 21 is identical; The frequency of the electric current that generator sends is constantly equal to the frequency of the electrical network that main generator incorporates into, thereby realizes variable speed constant frequency generator.
Claims (1)
1. direct parallel variable-speed constant-frequency generator; Comprise main shaft (1), be fixedly mounted on the generator amature (2) on the main shaft (1), and, generator direct-flow magnet exciting coil (21) is installed on the generator amature (2) around being arranged on generator amature (2) generator unit stator (3) on every side; Generator armature coil (31) is installed on the generator unit stator (3); On main shaft (1), generator amature (2) is fixedly mounted on the main shaft (1) generator unit stator (3) through Bearing Installation, and generator unit stator (3) becomes air gap to cooperate with generator amature (2); On main shaft (1), generator exciter is installed also, it is characterized in that:
Described generator exciter comprise through Bearing Installation in the exciter armature case (4) on the main shaft (1), be fixedly mounted on the exciter rotor (5) on the main shaft (1); Be installed with exciter rotor direct-flow magnet exciting coil (51) on the exciter rotor (5); Be installed with exciter armature (41) on the madial wall of exciter armature case (4); Exciter armature (41) becomes air gap to cooperate with exciter rotor (5); Be installed with main generator rotor coiled wire-wound coil (71) on the lateral wall of exciter armature case (4); The outside of exciter armature case (4) is set with main generator armature case (7); Main generator armature case (7) is fixedly connected with generator unit stator (3), is installed with main generator unit stator coil (81) on the madial wall of main generator armature case (7), and said main generator unit stator coil (81) becomes air gap to cooperate with main generator rotor coiled wire-wound coil (71); Main generator rotor coiled wire-wound coil (71) is electrically connected with exciter armature (41); The magnetic pole logarithm of main generator unit stator coil (81), exciter rotor direct-flow magnet exciting coil (51) and generator direct-flow magnet exciting coil (21) equates; On each phase line of said generator armature coil (31) and main generator unit stator coil (81) the connector lug that is connected electrical network is arranged; The two ends of said exciter armature case (4) are fixedly connected with two hollow shafts (6,61) respectively; Main shaft (1) is inserted in the inner chamber of a hollow shaft (6) through bearing; This hollow shaft (6) is connected with power shaft, and another hollow shaft (61) is sleeved on the main shaft (1); Two main generator armature case end caps (72,73) pass through Bearing Installation respectively on two hollow shafts (6,61), and main generator armature case (7) is fixedly connected on the circumference of two main generator armature case end caps (72,73); Main shaft (1) is provided with slip ring (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102334243A CN102738985A (en) | 2012-07-06 | 2012-07-06 | Direct grid-tied variable-speed constant-frequency generator |
| PCT/CN2013/078939 WO2014005554A1 (en) | 2012-07-06 | 2013-07-05 | Directly grid-connected variable speed constant frequency generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102334243A CN102738985A (en) | 2012-07-06 | 2012-07-06 | Direct grid-tied variable-speed constant-frequency generator |
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| Publication Number | Publication Date |
|---|---|
| CN102738985A true CN102738985A (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102334243A Pending CN102738985A (en) | 2012-07-06 | 2012-07-06 | Direct grid-tied variable-speed constant-frequency generator |
Country Status (2)
| Country | Link |
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| CN (1) | CN102738985A (en) |
| WO (1) | WO2014005554A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005554A1 (en) * | 2012-07-06 | 2014-01-09 | Wang Guangshun | Directly grid-connected variable speed constant frequency generator |
| CN104617729A (en) * | 2015-02-06 | 2015-05-13 | 浙江富春江水电设备有限公司 | Variable-speed constant-frequency generator |
| CN107546915A (en) * | 2017-08-23 | 2018-01-05 | 江苏法兰德电机科技有限公司 | Electrification structure for refrigerator car |
| CN112583221A (en) * | 2020-12-01 | 2021-03-30 | 西北工业大学 | High-power differential counter-rotating motor for underwater vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488053A (en) * | 1981-02-17 | 1984-12-11 | Lockheed Corporation | Electric constant speed/variable speed drive/generator assembly |
| US20050218740A1 (en) * | 2004-03-30 | 2005-10-06 | Stout David E | Low profile generator configuration |
| CN101359861A (en) * | 2008-05-19 | 2009-02-04 | 邵凯 | Speed variant, frequency constant synchronous power generator of wind power |
| CN102437699A (en) * | 2011-10-31 | 2012-05-02 | 王光顺 | Direct grid connection speed change constant frequency generator |
| CN202652019U (en) * | 2012-07-06 | 2013-01-02 | 王光顺 | Direct-grid-connected variable-speed constant-frequency generator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000350309A (en) * | 1999-06-04 | 2000-12-15 | Denso Corp | Power converting system and driving system in vehicle |
| CN102738985A (en) * | 2012-07-06 | 2012-10-17 | 王光顺 | Direct grid-tied variable-speed constant-frequency generator |
-
2012
- 2012-07-06 CN CN2012102334243A patent/CN102738985A/en active Pending
-
2013
- 2013-07-05 WO PCT/CN2013/078939 patent/WO2014005554A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488053A (en) * | 1981-02-17 | 1984-12-11 | Lockheed Corporation | Electric constant speed/variable speed drive/generator assembly |
| US20050218740A1 (en) * | 2004-03-30 | 2005-10-06 | Stout David E | Low profile generator configuration |
| CN101359861A (en) * | 2008-05-19 | 2009-02-04 | 邵凯 | Speed variant, frequency constant synchronous power generator of wind power |
| CN102437699A (en) * | 2011-10-31 | 2012-05-02 | 王光顺 | Direct grid connection speed change constant frequency generator |
| CN202652019U (en) * | 2012-07-06 | 2013-01-02 | 王光顺 | Direct-grid-connected variable-speed constant-frequency generator |
Non-Patent Citations (1)
| Title |
|---|
| 汤蕴璆: "《电机学》", 31 January 2005 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005554A1 (en) * | 2012-07-06 | 2014-01-09 | Wang Guangshun | Directly grid-connected variable speed constant frequency generator |
| CN104617729A (en) * | 2015-02-06 | 2015-05-13 | 浙江富春江水电设备有限公司 | Variable-speed constant-frequency generator |
| CN107546915A (en) * | 2017-08-23 | 2018-01-05 | 江苏法兰德电机科技有限公司 | Electrification structure for refrigerator car |
| CN112583221A (en) * | 2020-12-01 | 2021-03-30 | 西北工业大学 | High-power differential counter-rotating motor for underwater vehicle |
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| Publication number | Publication date |
|---|---|
| WO2014005554A1 (en) | 2014-01-09 |
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Application publication date: 20121017 |