CN203984201U - Brushless excitation generator - Google Patents
Brushless excitation generator Download PDFInfo
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- CN203984201U CN203984201U CN201420282563.XU CN201420282563U CN203984201U CN 203984201 U CN203984201 U CN 203984201U CN 201420282563 U CN201420282563 U CN 201420282563U CN 203984201 U CN203984201 U CN 203984201U
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- generator
- exciter
- excitation
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- armature winding
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- 230000005284 excitation Effects 0.000 title claims abstract description 72
- 238000004804 winding Methods 0.000 claims abstract description 78
- 238000001514 detection method Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a kind of brushless excitation generator, comprising: AC exciter and generator, this brushless excitation generator also comprises: pilot exciter, pilot exciter rotor is located on the rotor of generator and pilot exciter rotor is permanent magnet component; Pilot exciter armature winding is located on the stator of generator and pilot exciter armature winding connects the excitation winding of AC exciter through field regulator.By pilot exciter is set, pilot exciter armature winding is responded to generation alternating current to power to field regulator in the time that rotor rotates, to meet the requirement of excitation power supply of AC exciter, and through the output size of field regulator control field power supply, save the control trouble of excitation switch, therefore the utility model brushless excitation generator has saved traditional excitation power supply and Lai control of loop, circuit is simple, and generator operation is reliable.
Description
Technical field
The utility model relates to electrical generator fields, especially, relates to a kind of brushless excitation generator.
Background technology
Gas Turbine Generating Units is using gas turbine as prime mover, and the thermal power transfer in fuel is become to mechanical energy, then the synchronous generator dragging by it converts electric energy to.Synchronous generator is actually that two generators form, and one as AC exciter, and another is only main generator.Main generator in Gas Turbine Generating Units is provided with the additional winding of stator, and the additional winding of stator provides power power-supply for AC exciter.The excitation winding of armature winding, rotating rectifier and the main generator of AC exciter all on the rotor of main generator, coaxial rotating, the additional winding of the excitation winding of AC exciter and stator is on the stator of main generator.
Each when sending out main motor and playing machine, stator residual voltage is very low, and the additional winding voltage of stator is lower, only has 3-6V, and the minimum requirements of excitation controller operating voltage is 10V, and while causing starting, excitation cannot normally be worked, and needs increase excitation initiating circuit in addition.When each starting, need first conducting excitation switch, while observing the output voltage arrival rated value 30% of main generator, disconnect excitation switch, can cause main generator overvoltage if disconnect not in time excitation switch.Complicated operation like this, circuit is also complicated, needs to increase in addition excitation power supply and Lai control of loop, and unit failure rate increases.
Utility model content
The utility model object is to provide a kind of brushless excitation generator, needs the complex circuit that excitation power supply causes and controls loaded down with trivial details technical problem in when starting to solve existing brushless excitation generator.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of brushless excitation generator, comprising: AC exciter and generator, and AC exciter is for providing the excitation winding of field power supply to generator; This brushless excitation generator also comprises: pilot exciter, and the pilot exciter rotor of pilot exciter is located on the rotor of generator and pilot exciter rotor is permanent magnet component; The pilot exciter armature winding of pilot exciter is located on the stator of generator and pilot exciter armature winding connects the excitation winding of AC exciter through field regulator.
Further, AC exciter is provided with the first excitation winding and the first armature winding; Generator is provided with the second excitation winding and the second armature winding;
The first excitation winding and the second armature winding are located on the stator of generator;
The first armature winding, the second excitation winding and rotating rectifier are located on the rotor of generator and coaxial rotating, and the first armature winding connects the second excitation winding through rotating rectifier.
Further, rotating rectifier is three-phase bridge rectifier circuit.
Further, field regulator is connected with for detection of the current transformer of the output current of the second armature winding with for detection of the voltage transformer of the output voltage of the second armature winding.
Further, pilot exciter rotor is permanent magnet.
Further, the rotor of generator and the output shaft of gas turbine are coaxially connected.
The utlity model has following beneficial effect:
Originally be utility model brushless excitation generator, by pilot exciter is set, this pilot exciter comprises the pilot exciter armature winding on the stator of being located at the epitrochanterian pilot exciter rotor of generator and being located at generator, pilot exciter armature winding is responded to generation alternating current to power to field regulator in the time that rotor rotates, to meet the requirement of excitation power supply of AC exciter, and through the output size of field regulator control field power supply, save the control trouble of excitation switch, therefore the utility model brushless excitation generator has saved traditional excitation power supply and Lai control of loop, circuit is simple, and generator operation is reliable.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the utility model preferred embodiment brushless excitation generator.
Description of reference numerals:
10, pilot exciter; 20, AC exciter; 30, generator;
40, rotating rectifier; 50, field regulator;
11, pilot exciter rotor; 13, pilot exciter armature winding;
21, the first excitation winding; 23, the first armature winding;
31, stator; 32, rotor;
33, the second excitation winding; 34, the second armature winding.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
With reference to Fig. 1, preferred embodiment of the present utility model provides a kind of brushless excitation generator, and this brushless excitation generator is made up of three generators, specifically comprises: pilot exciter 10, AC exciter 20 and generator 30.Wherein, pilot exciter 10 comprises: be located at the pilot exciter rotor 11 on the rotor 32 of generator 30 and be located at the pilot exciter armature winding 13 on the stator 31 of generator 30; AC exciter 20 comprises: the first excitation winding 21 and the first armature winding 23; Generator 30 comprises: the second excitation winding 33 and the second armature winding 34.In the present embodiment, pilot exciter armature winding 13, the first excitation winding 21 and the second armature winding 34 are all located on stator 31, pilot exciter rotor 11, the first armature winding 23 and the second excitation winding 33 are all located on rotor 32, wherein, the first armature winding 23 connects the second excitation winding 33 through rotating rectifier 40, and the first armature winding 23, rotating rectifier 40 and the second excitation winding 33 and sub 32 coaxial rotatings that rotate.In the time that the rotor 32 of generator 30 starts to rotate under external force, pilot exciter rotor 11 rotates thereupon, in the present embodiment, pilot exciter rotor 11 is permanent magnet component, the magnetic field that the rotation of pilot exciter rotor 11 changes, pilot exciter armature winding 13 on stator 31 produces alternating current the power power-supply as field regulator 50, like this, efficiently solve the problem that the additional winding of stator forces down at the induced electricity in generator starting stage, in the present embodiment, field regulator 50 output dc voltages are loaded in the first excitation winding 21 of AC exciter 20, the first armature winding 23 generates alternating current output, the alternating current that the first armature winding 23 is exported becomes direct current and offers the second excitation winding 33 of generator 30 after the conversion process of rotating rectifier 40, the second armature winding 34 inductions of generator generate required alternating current.In the present embodiment, AC exciter 20 provides second excitation winding 33 of field power supply to generator 30, to realize brushless excitation.
The present embodiment is by arranging pilot exciter 10, this pilot exciter 10 comprises pilot exciter rotor on the rotor 32 of being located at generator 30 11 and is located at the pilot exciter armature winding 13 on the stator 31 of generator 30, pilot exciter armature winding 13 is responded to generation alternating current to power to field regulator 50 in the time that rotor 32 rotates, to meet the requirement of excitation power supply of AC exciter 20, and control the output size of field power supply through field regulator 50, save the control trouble of excitation switch, therefore the utility model brushless excitation generator has saved traditional excitation power supply and Lai control of loop, circuit is simple, and generator 30 is reliable.
In the present embodiment, rotating rectifier 40 is three-phase bridge rectifier circuit, and the alternating current that the first armature winding 23 generates is exported direct current to the second excitation winding 33 after three-phase bridge rectifier circuit rectification.
In the present embodiment, the low problem of exciting voltage when solving the starting of brushless excitation generator, be provided with pilot exciter 10, preferably, the pilot exciter rotor 11 of pilot exciter 10 is permanent magnet, this permanent magnet is located on the rotor 32 of generator 30, generates with the rotation of the rotor 32 with generator 30 magnetic field changing.
Preferably, in the present embodiment, field regulator 50 is connected with for detection of the current transformer of the output current I of the second armature winding 34 with for detection of the voltage transformer of the output voltage U of the second armature winding 34.Field regulator 50 is by detecting in real time output voltage and the output current of generator 30, according to controlling the output voltage and/or the output current that require to calculate field regulator 50, to regulate the direct current to AC exciter 20 according to the power output of generator 30, thus the field power supply that regulates AC exciter 20 to export.
Preferably, in the present embodiment, this brushless excitation generator is for Gas Turbine Generating Units, and the rotor 32 of generator 30 is coaxially connected with the output shaft of gas turbine, and to utilize gas turbine as prime mover, drawing generator 30 generates electricity.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. a brushless excitation generator, comprising: AC exciter (20) and generator (30), and described AC exciter (20) is for providing the excitation winding of field power supply to described generator (30); It is characterized in that,
This brushless excitation generator also comprises: pilot exciter (10), and it is permanent magnet component that the pilot exciter rotor (11) of described pilot exciter (10) is located at the upper and described pilot exciter rotor (11) of the rotor (32) of described generator (30); The pilot exciter armature winding (13) of described pilot exciter (10) is located at the upper and described pilot exciter armature winding (13) of the stator (31) of described generator (30) connects described AC exciter (20) excitation winding through field regulator (50).
2. brushless excitation generator according to claim 1, is characterized in that,
Described AC exciter (20) is provided with the first excitation winding (21) and the first armature winding (23); Described generator (30) is provided with the second excitation winding (33) and the second armature winding (34);
Described the first excitation winding (21) and described the second armature winding (34) are located on the stator (31) of described generator (30):
Described the first armature winding (23), described the second excitation winding (33) and rotating rectifier (40) are located at the rotor (32) of described generator (30) and are gone up and coaxial rotating, and described the first armature winding (23) connects described the second excitation winding (33) through described rotating rectifier (40).
3. brushless excitation generator according to claim 2, is characterized in that,
Described rotating rectifier (40) is three-phase bridge rectifier circuit.
4. brushless excitation generator according to claim 2, is characterized in that,
Described field regulator (50) is connected with for detection of the current transformer of the output current of described the second armature winding (34) with for detection of the voltage transformer of the output voltage of described the second armature winding (34).
5. brushless excitation generator according to claim 2, is characterized in that,
Described pilot exciter rotor (11) is permanent magnet.
6. according to the brushless excitation generator described in claim 1 to 5 any one, it is characterized in that,
The rotor (32) of described generator (30) is coaxially connected with the output shaft of gas turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282563.XU CN203984201U (en) | 2014-05-29 | 2014-05-29 | Brushless excitation generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282563.XU CN203984201U (en) | 2014-05-29 | 2014-05-29 | Brushless excitation generator |
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| Publication Number | Publication Date |
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| CN203984201U true CN203984201U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420282563.XU Expired - Fee Related CN203984201U (en) | 2014-05-29 | 2014-05-29 | Brushless excitation generator |
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| Country | Link |
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| CN (1) | CN203984201U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290736A (en) * | 2020-10-15 | 2021-01-29 | 东方电气集团东风电机有限公司 | Three-machine excitation steam generator suitable for isolated network operation |
| CN114928027A (en) * | 2022-05-30 | 2022-08-19 | 阳江核电有限公司 | Grounding protection method and device for three-machine brushless excitation system |
-
2014
- 2014-05-29 CN CN201420282563.XU patent/CN203984201U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290736A (en) * | 2020-10-15 | 2021-01-29 | 东方电气集团东风电机有限公司 | Three-machine excitation steam generator suitable for isolated network operation |
| CN114928027A (en) * | 2022-05-30 | 2022-08-19 | 阳江核电有限公司 | Grounding protection method and device for three-machine brushless excitation system |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20180529 |