CN204145350U - Modified model single-phase brushless generator group - Google Patents
Modified model single-phase brushless generator group Download PDFInfo
- Publication number
- CN204145350U CN204145350U CN201420667693.5U CN201420667693U CN204145350U CN 204145350 U CN204145350 U CN 204145350U CN 201420667693 U CN201420667693 U CN 201420667693U CN 204145350 U CN204145350 U CN 204145350U
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- stator
- resistance
- rotor
- exciter
- out terminal
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Abstract
The utility model relates to a kind of brushless single phase group of motors, comprise stator leading-out terminal, main rotor, main frame stator, rectifier, exciter rotor, exciter stator, AVR voltage regulator, also comprise ground protection circuit, the variable inductor of ground protection circuit is corresponding to the excitation winding position on exciter rotor, described ground protection circuit comprises sampling resistor, variable inductor, earth resistance, convert resistance, convert resistance switch, voltmeter, described sampling resistor, inductor, convert resistance, voltmeter is cascaded, earth resistance one end is connected on the slide plate of variable inductor, the other end is connected with convert resistance leading-out terminal and ground connection.The utility model is for when changing due to exciting voltage, optimization has been made in the change of the practical application resistive segments of earth resistance, solve the problem that there is relatively large deviation between the measured value of traditional grounding resistance of transmission and actual value, make the life-span of single-phase brushless generator group longer, fail safe is higher.
Description
Technical field
The utility model relates to a kind of generating set, is a kind of modified model single-phase brushless generator group specifically.
background technology
Produce because electric energy has and change both economical, transmission and distribution ratio are easier to, use and control the advantages such as more convenient, thus become modern the most frequently used a kind of energy, and along with the development of national economy, automaticity is more and more higher, increasing to the demand of electricity, not only require electricity consumption quantity, requirement be it is also proposed to the quality of electricity consumption simultaneously, undoubtedly high request be it is also proposed to the performance of synchronous generator.
Have brushless generator and brush hair motor in the market, have and brush hair the basis that motor is all motors, it have start fast, braking in time, can the features such as speed governing smoothly, control circuit be relatively simple on a large scale.Brushless generator is actually that two generators form, one as exciter, one is main generator.The excitation winding of main generator is at rotor, and armature winding is at stator, and the armature winding of exciter is at rotor, and excitation winding is at stator.The operation principle of brushless generator provides excitation to the excitation winding of exciter on stator, its armature rotor winding will send alternating current, power to the excitation winding of main generator at rotor at rotor after over commutation, thus make main generator induce required alternating current at the armature winding of stator.
But brushless generator eliminates brush and slip ring structure, the voltage of excitation rotor, electric current and temperature are difficult to direct measurement, so more difficult for the fault detect of the ground connection of excitation rotor.At present; the excitation winding grounding of single-phase brushless generator generally adopts one point earth fault protection circuit structure; and generator excitation circuit one-point grounding fault is very common; it does not work the mischief to engine block; if but in succession there is second point earth fault; then there will be the excessive burn rotor body of current in the fault point, excitation winding is caused the catastrophic consequences such as vibration and axle system rotor magnetization by short circuit air-gap flux disequilibrium, the safety of serious threat generator.Therefore brushless generator installing earthing device is imperative.
Summary of the invention
For above-mentioned situation; the utility model provides a kind of single-phase brushless generator group; set up earth protective device, the mode that earth protective device adopts superposition direct current pressure type to combine with switch sampling formula, the monitoring for the voltage of excitation rotor, electric current is more accurate.For when changing due to exciting voltage, optimization has been made in the change of the practical application resistive segments of earth resistance, solve the problem that there is relatively large deviation between the measured value of traditional grounding resistance of transmission and actual value, make the life-span of single-phase brushless generator group longer, fail safe is higher.
To achieve these goals, the technical solution of the utility model is as follows:
Brushless single phase group of motors, comprises stator leading-out terminal, main rotor, main frame stator, rectifier, exciter rotor, exciter stator, AVR voltage regulator, main frame stator two ends connecting stator leading-out terminal, exciter stator is parallel with between main frame stator and stator leading-out terminal, AVR voltage regulator is also provided with between exciter stator and stator leading-out terminal, main rotor two ends are parallel with exciter rotor, exciter rotor is connected with main rotor by rectifier, it is characterized in that, also comprise ground protection circuit, the variable inductor of ground protection circuit is corresponding to the excitation winding position on exciter rotor, and described ground protection circuit comprises sampling resistor, variable inductor, earth resistance, convert resistance, convert resistance switch, voltmeter, described sampling resistor, inductor, convert resistance, voltmeter is cascaded, and earth resistance one end is connected on the slide plate of variable inductor, and the other end is connected with convert resistance leading-out terminal and ground connection, and the two ends of described convert resistance are parallel with convert resistance switch.
The utility model is by the switching of convert resistance switch, two loop equations can be obtained, direct solution grounding resistance, make the determination of earth resistance more accurate, avoid the excessive burn rotor body of earth fault current, excitation winding is caused the catastrophic consequences such as vibration and axle system rotor magnetization by short circuit air-gap flux disequilibrium, the safety of serious threat generator.
The utility model has the advantages that: set up earth protective device, the mode that earth protective device adopts superposition direct current pressure type to combine with switch sampling formula, the monitoring for the voltage of excitation rotor, electric current is more accurate.For when changing due to exciting voltage, optimization has been made in the change of the practical application resistive segments of earth resistance, solve the problem that there is relatively large deviation between the measured value of traditional grounding resistance of transmission and actual value, make the life-span of single-phase brushless generator group longer, fail safe is higher.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
In the drawings: 1-stator leading-out terminal, 2-main rotor, 3-main frame stator, 4-rectifier, 5-exciter rotor, 6-exciter stator, 61-AVR voltage regulator, 7-sampling resistor, 8-voltmeter, 9-convert resistance, 10-earth resistance, 11-convert resistance switch, 12-slide plate, 13-variable inductor.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See Fig. 1, brushless single phase group of motors, comprises stator leading-out terminal, main rotor, main frame stator, rectifier, exciter rotor, exciter stator, AVR voltage regulator, main frame stator two ends connecting stator leading-out terminal, exciter stator is parallel with between main frame stator and stator leading-out terminal, AVR voltage regulator is also provided with between exciter stator and stator leading-out terminal, main rotor two ends are parallel with exciter rotor, exciter rotor is connected with main rotor by rectifier, it is characterized in that, also comprise ground protection circuit, the variable inductor of ground protection circuit is corresponding to the excitation winding position on exciter rotor, and described ground protection circuit comprises sampling resistor, variable inductor, earth resistance, convert resistance, convert resistance switch, voltmeter, described sampling resistor, inductor, convert resistance, voltmeter is cascaded, and earth resistance one end is connected on the slide plate of variable inductor, and the other end is connected with convert resistance leading-out terminal and ground connection, and the two ends of described convert resistance are parallel with convert resistance switch.
The utility model is by the switching of convert resistance switch, two loop equations can be obtained, direct solution grounding resistance, make the determination of earth resistance more accurate, avoid the excessive burn rotor body of earth fault current, excitation winding is caused the catastrophic consequences such as vibration and axle system rotor magnetization by short circuit air-gap flux disequilibrium, the safety of serious threat generator.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; the just principle of the present utility model described in above-described embodiment and specification; under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection range that the utility model requires is defined by appending claims and equivalent thereof.
Claims (1)
1. brushless single phase group of motors, comprises stator leading-out terminal, main rotor, main frame stator, rectifier, exciter rotor, exciter stator, AVR voltage regulator, main frame stator two ends connecting stator leading-out terminal, exciter stator is parallel with between main frame stator and stator leading-out terminal, AVR voltage regulator is also provided with between exciter stator and stator leading-out terminal, main rotor two ends are parallel with exciter rotor, exciter rotor is connected with main rotor by rectifier, it is characterized in that, also comprise ground protection circuit, the variable inductor of ground protection circuit is corresponding to the excitation winding position on exciter rotor, and described ground protection circuit comprises sampling resistor, variable inductor, earth resistance, convert resistance, convert resistance switch, voltmeter, described sampling resistor, inductor, convert resistance, voltmeter is cascaded, and earth resistance one end is connected on the slide plate of variable inductor, and the other end is connected with convert resistance leading-out terminal and ground connection, and the two ends of described convert resistance are parallel with convert resistance switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667693.5U CN204145350U (en) | 2014-11-11 | 2014-11-11 | Modified model single-phase brushless generator group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667693.5U CN204145350U (en) | 2014-11-11 | 2014-11-11 | Modified model single-phase brushless generator group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204145350U true CN204145350U (en) | 2015-02-04 |
Family
ID=52422013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420667693.5U Expired - Fee Related CN204145350U (en) | 2014-11-11 | 2014-11-11 | Modified model single-phase brushless generator group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204145350U (en) |
-
2014
- 2014-11-11 CN CN201420667693.5U patent/CN204145350U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20150204 Termination date: 20171111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |