CN203166809U - High-voltage current-limiting motor protector - Google Patents
High-voltage current-limiting motor protector Download PDFInfo
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- CN203166809U CN203166809U CN 201320173886 CN201320173886U CN203166809U CN 203166809 U CN203166809 U CN 203166809U CN 201320173886 CN201320173886 CN 201320173886 CN 201320173886 U CN201320173886 U CN 201320173886U CN 203166809 U CN203166809 U CN 203166809U
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Abstract
The utility model relates to a high-voltage current-limiting motor protector which comprises a CPU, a high-voltage current-limiting circuit, a current sampling circuit and a driving circuit. The high-voltage current-limiting circuit comprises a high-voltage isolating switch, a vacuum circuit breaker, a zinc oxide non-linear component, a high-voltage current-limiting fuse. One end of the high-voltage isolating switch is electrically connected to a power supply, and the other end of the high-voltage isolating switch is electrically connected to one end of the vacuum circuit breaker via the zinc oxide non-linear component. The high-voltage current-limiting fuse is in parallel connection with the zinc oxide non-linear component. The driving circuit comprises three pairs of silicon controlled rectifiers in anti-parallel connection which are electrically connected orderly and are in series connection between the other end of the circuit breaker and the motor, and the controlled end of each of the silicon controlled rectifiers is electrically connected with the CPU. The current sampling circuit samples the current information of the power supply to the CPU. The high-voltage current-limiting motor protector has the advantages that the input voltage of the motor is changed according to different needs, and different starting functions are realized; when a system is in short circuit, short circuit current can be broken within one second to two seconds.
Description
Technical field
The utility model relates to a kind of protector, relates in particular to a kind of high-voltage and current-limitation motor protector.
Background technology
At present, motor is widely used in various mechanizations, the electrified system, in use find: the capacity relative scale of motor in system is bigger, the full voltage starting motor will cause place network system pressure drop excessive, thereby, can influence the normal operation with the net miscellaneous equipment, when serious even can to cause that electrical network loses stable, also can produce higher peak torque, thereby motor and whole machine driving are caused harmful impact.Traditional reactor and compensator starting mode are a kind of step-down modes of great-jump-forward, so can not mate by fine load curve with equipment, can not adjust start-up parameter easily according to load state, guarantee the stable startup of motor transmission agent.
Summary of the invention
In view of this; be necessary to provide a kind of high-voltage and current-limitation motor protector; it is for the motor of band periodic load and long-term light running; do not taking under the conservation measures situation power consumption efficiency low; power factor is low; by motor is carried out Energy Saving Control, can obviously improve power consumption efficiency and improve power factor, reach energy saving purposes.
The utility model is achieved in that a kind of high-voltage and current-limitation motor protector, and it is electrically connected between power supply and the motor operation for the protection of this motor; This high-voltage and current-limitation motor protector comprises CPU, high-voltage and current-limitation circuit and the current sampling circuit, the drive circuit that all electrically connect with this CPU; This high-voltage and current-limitation circuit comprises high voltage isolator, vacuum circuit-breaker, zinc oxide nonlinear element, high-voltage and current-limitation fuse; One end of this high voltage isolator is electrically connected at this power supply, and the other end of this high voltage isolator is electrically connected at an end of this vacuum circuit-breaker via this zinc oxide nonlinear element, and this high-voltage and current-limitation fuse is connected in parallel on this zinc oxide nonlinear element; This drive circuit comprises three pairs of Group of Silicon Controlled Rectifier, two controllable silicon inverse parallels in every Group of Silicon Controlled Rectifier connect, the Group of Silicon Controlled Rectifier of three pairs of inverse parallel connections electrically connects successively and is serially connected with between the other end and this motor of this vacuum circuit-breaker, and the controlled end of each silicon controlled is electrically connected at this CPU; One end of this current sampling circuit is electrically connected between this power supply and this drive circuit, and the other end of this current sampling circuit is electrically connected at this CPU.
As the further improvement of such scheme, this high-voltage and current-limitation motor protector also comprises the operational order input circuit, and this operational order input circuit is electrically connected at this CPU.
Preferably, this operational order input circuit is the keyboard that is electrically connected at this CPU.
Preferably, this operational order input circuit is the touch screen that is electrically connected at this CPU.
As the further improvement of such scheme, this high-voltage and current-limitation motor protector also comprises display circuit, and this display circuit is electrically connected at this CPU.
Preferably, this display circuit is the LCD that is electrically connected at this CPU.
The advantage of the high-voltage and current-limitation motor protector that the utility model provides is: utilize power electronic technology and automatic control technology; the control technology that forceful electric power and light current are combined realizes soft start; utilize controllable silicon phase shifting control principle; control three pairs of inverse parallel silicon controlled angles of flow; the input voltage of motor is changed by different requirements, thereby realize different start-up functions.
Description of drawings
The structural representation of the high-voltage and current-limitation motor protector that Fig. 1 provides for the utility model preferred embodiments.
Main symbol description: power supply 1, motor 2, high-voltage and current-limitation motor protector 3, CPU 4, current sampling circuit 5, drive circuit 6, operational order input circuit 7, display circuit 8, controllable silicon 9, high-voltage and current-limitation circuit 10, high voltage isolator GL, vacuum circuit-breaker DL, zinc oxide nonlinear element FR, high-voltage and current-limitation fuse FU.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also Fig. 1, the structural representation of the high-voltage and current-limitation motor protector that it provides for the utility model preferred embodiments.This high-voltage and current-limitation motor protector 3 is electrically connected between power supply 1 and the motor 2 operation for the protection of this motor 2.This high-voltage and current-limitation motor protector 3 comprises CPU 4, high-voltage and current-limitation circuit 10 and the current sampling circuit 5, drive circuit 6, the operational order input circuit 7 and display circuit 8 that all electrically connect with this CPU 4.
This high-voltage and current-limitation circuit 10 comprises high voltage isolator GL, vacuum circuit-breaker DL, zinc oxide nonlinear element FR, high-voltage and current-limitation fuse FU.The end of this high voltage isolator GL is electrically connected at this power supply 1, the other end of this high voltage isolator GL is electrically connected at the end of this vacuum circuit-breaker DL via this zinc oxide nonlinear element FR, and this high-voltage and current-limitation fuse FU is connected in parallel on this zinc oxide nonlinear element FR.
This drive circuit 6 comprises three pairs of Group of Silicon Controlled Rectifier, two controllable silicon 9 inverse parallels in every Group of Silicon Controlled Rectifier connect, the Group of Silicon Controlled Rectifier of three pairs of inverse parallel connections electrically connects successively and is serially connected with between the other end and this motor 2 of vacuum circuit-breaker DL, and the controlled end of each controllable silicon 9 is electrically connected at this CPU 4; One end of this current sampling circuit 5 is electrically connected between this power supply 1 and this drive circuit 6, and the other end of this current sampling circuit 5 is electrically connected at this CPU 4.
The current data input CPU 4 that this current sampling circuit 5 is sampled and obtained, CPU 4 is by the conducting of in house software program calculating control controllable silicon 9 and by realizing the purpose of this utility model.The utility model utilizes power electronic technology and automatic control technology, the control technology that forceful electric power and light current are combined realizes soft start, utilize controllable silicon phase shifting control principle, the angle of flow of three pairs of inverse parallel controllable silicons 9 of control, the input voltage of motor 2 is changed by different requirements, thereby realize different start-up functions.By the control to controllable silicon 9 angles of flow, reach good motor 2 soft start functions, when the normal operation of motor 2, can realize functions such as energy-conservation, voltage stabilizing, filtering harmonic wave shove.Have defencive functions such as open-phase protection, overcurrent protection, overvoltage protection simultaneously.
During starting, the angle of flow of controllable silicon 9 is started from scratch, reach gradually, the terminal voltage of motor 2 is started from scratch, and rises gradually by preset function relation, satisfies starting torque and motor 2 is started smoothly until reaching, and motor 2 full voltages are moved.Wherein, soft stop process and soft start are opposite, and the terminal voltage by controllable silicon 9 control motor 2 can be avoided driving unexpected stagnation, the infringement that causes some systems to bring because of velocity jump from the level and smooth reduction of rated voltage thus.
When short circuit occurring, high-voltage and current-limitation fuse FU quick fuse in 1 ~ 2ms, cutting-off of short-circuit electric current, high-voltage and current-limitation fuse FU dams and produces the electric arc pressure, force arc current to be transferred to zinc oxide nonlinear element FR, thermal capacity is big, and logical good fluidity plays the effect of extinguishing high-voltage and current-limitation fuse FU electric arc fast.
Operational order input circuit 7 can be keyboard or touch screen, is used for the input external command, changes the operation of CPU 4.Display circuit 8 can be LCD, when CPU 4 need show some data, can realize by control display circuit 8.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (6)
1. high-voltage and current-limitation motor protector, it is electrically connected between power supply and the motor operation for the protection of this motor; It is characterized in that this high-voltage and current-limitation motor protector comprises CPU, high-voltage and current-limitation circuit and the current sampling circuit, the drive circuit that all electrically connect with this CPU; This high-voltage and current-limitation circuit comprises high voltage isolator, vacuum circuit-breaker, zinc oxide nonlinear element, high-voltage and current-limitation fuse; One end of this high voltage isolator is electrically connected at this power supply, and the other end of this high voltage isolator is electrically connected at an end of this vacuum circuit-breaker via this zinc oxide nonlinear element, and this high-voltage and current-limitation fuse is connected in parallel on this zinc oxide nonlinear element; This drive circuit comprises three pairs of Group of Silicon Controlled Rectifier, two controllable silicon inverse parallels in every Group of Silicon Controlled Rectifier connect, the Group of Silicon Controlled Rectifier of three pairs of inverse parallel connections electrically connects successively and is serially connected with between the other end and this motor of this vacuum circuit-breaker, and the controlled end of each silicon controlled is electrically connected at this CPU; One end of this current sampling circuit is electrically connected between this power supply and this drive circuit, and the other end of this current sampling circuit is electrically connected at this CPU.
2. high-voltage and current-limitation motor protector as claimed in claim 1 is characterized in that, this high-voltage and current-limitation motor protector also comprises the operational order input circuit, and this operational order input circuit is electrically connected at this CPU.
3. high-voltage and current-limitation motor protector as claimed in claim 2 is characterized in that, this operational order input circuit is the keyboard that is electrically connected at this CPU.
4. high-voltage and current-limitation motor protector as claimed in claim 2 is characterized in that, this operational order input circuit is the touch screen that is electrically connected at this CPU.
5. high-voltage and current-limitation motor protector as claimed in claim 1 or 2 is characterized in that, this high-voltage and current-limitation motor protector also comprises display circuit, and this display circuit is electrically connected at this CPU.
6. high-voltage and current-limitation motor protector as claimed in claim 5 is characterized in that, this display circuit is the LCD that is electrically connected at this CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320173886 CN203166809U (en) | 2013-04-09 | 2013-04-09 | High-voltage current-limiting motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320173886 CN203166809U (en) | 2013-04-09 | 2013-04-09 | High-voltage current-limiting motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203166809U true CN203166809U (en) | 2013-08-28 |
Family
ID=49027963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320173886 Expired - Fee Related CN203166809U (en) | 2013-04-09 | 2013-04-09 | High-voltage current-limiting motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203166809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849030A (en) * | 2017-03-02 | 2017-06-13 | 安徽伊格瑞德电气设备有限公司 | A kind of high-voltage and current-limitation device based on current limliting zinc oxide FR |
-
2013
- 2013-04-09 CN CN 201320173886 patent/CN203166809U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849030A (en) * | 2017-03-02 | 2017-06-13 | 安徽伊格瑞德电气设备有限公司 | A kind of high-voltage and current-limitation device based on current limliting zinc oxide FR |
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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: 20130828 Termination date: 20170409 |