CN202564925U - Input overcurrent overvoltage protector used for frequency converter - Google Patents
Input overcurrent overvoltage protector used for frequency converter Download PDFInfo
- Publication number
- CN202564925U CN202564925U CN2012200920471U CN201220092047U CN202564925U CN 202564925 U CN202564925 U CN 202564925U CN 2012200920471 U CN2012200920471 U CN 2012200920471U CN 201220092047 U CN201220092047 U CN 201220092047U CN 202564925 U CN202564925 U CN 202564925U
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- China
- Prior art keywords
- controlled switch
- frequency converter
- input
- circuit breaker
- overvoltage protector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 230000001012 protector Effects 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model provides an input overcurrent overvoltage protector used for a frequency converter, and the input overcurrent overvoltage protector has a simple structure and low cost. The input overcurrent overvoltage protector comprises an input voltage detection circuit, a control module, an electric controlled switch and a circuit breaker. After the input voltage detection circuit detects an input voltage of a generator, the input voltage is sent to the control module. The control module controls closing and opening of the electric controlled switch according to a detection value of the input voltage. The electric controlled switch controls opening and closing of the circuit breaker. When the detection value is greater than a preset voltage threshold value, the electric controlled switch is controlled to open, and the circuit breaker is opened; and when the detection value is smaller than or equal to the preset voltage threshold value, the electric controlled switch is controlled to close, and the circuit breaker is closed. The input overcurrent overvoltage protector used for the frequency converter has advantages of simple structure, low cost, wide application and improved usage safety of the frequency converter.
Description
Technical field
The utility model relates to a kind of frequency converter protective device, especially a kind of input overcurrent and overvoltage protector that is applied to frequency converter.
Background technology
At present, TRT is very universal, like wind power generation; Diesel power generation etc., the voltage of electricity generation system output is two or three-phase alternating voltage usually, and generally all in a bigger scope, fluctuates; Can not directly offer electronic equipment uses; All need become fixing phase voltage to unsettled voltage transitions in the practical application, offer relevant power consumption equipment then or input to electrical network through a converter plant.
Existing frequency converter is under abnormal conditions, and problems such as driving can appear in generator, make power output uncontrolled, and frequency converter is damaged.
The utility model content
The utility model provides a kind of simple in structure, input overcurrent and overvoltage protector that is applied to frequency converter that cost is low.
Realize the input overcurrent and overvoltage protector that is applied to frequency converter of the utility model purpose, comprise input voltage detection circuit, control module, electric gate-controlled switch and circuit breaker;
After said input voltage detection circuit detects the input voltage of generator, send to said control module, said control module is controlled the disconnection and the closure of said electric gate-controlled switch according to the detected value of input voltage, the switch of said electric gate-controlled switch control circuit breaker; When said detected value during greater than preset voltage threshold, to control said electric gate-controlled switch and break off, circuit breaker breaks off; When said detected value was less than or equal to preset voltage threshold, it was closed to control said electric gate-controlled switch, and circuit breaker is opened.
The beneficial effect of the input overcurrent and overvoltage protector that is applied to frequency converter of the utility model is following:
The input overcurrent and overvoltage protector that is applied to frequency converter of the utility model, simple in structure, cost is low, be fit to widespread adoption, improved the fail safe that frequency converter uses.
Description of drawings
Fig. 1 is the structural representation of the input overcurrent and overvoltage protector that is applied to frequency converter of the utility model.
Embodiment
As shown in Figure 1, the input overcurrent and overvoltage protector that is applied to frequency converter of the utility model comprises input voltage detection circuit 1, control module 2, electric gate-controlled switch 3 and circuit breaker 4;
After said input voltage detection circuit 1 detects the input voltage of generator; Send to said control module 2; Said control module 2 is controlled the disconnection and the closure of said electric gate-controlled switch 3 according to the detected value of input voltage, the switch of said electric gate-controlled switch 3 control circuit breakers 4; When said detected value during greater than preset voltage threshold, to control said electric gate-controlled switch 3 and break off, circuit breaker 4 breaks off; When said detected value is less than or equal to preset voltage threshold, control said electric gate-controlled switch 3 closures, circuit breaker 4 is opened.
The advantage of the input overcurrent and overvoltage protector that is applied to frequency converter of the utility model is following:
The input overcurrent and overvoltage protector that is applied to frequency converter of the utility model, simple in structure, cost is low, be fit to widespread adoption, improved the fail safe that frequency converter uses.
Embodiment recited above describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Design under the spiritual prerequisite not breaking away from the utility model; Various distortion and improvement that the common engineers and technicians in this area make the utility model technical scheme all should fall in the protection range that claims of the utility model confirm.
Claims (1)
1. an input overcurrent and overvoltage protector that is applied to frequency converter is characterized in that: comprise input voltage detection circuit, control module, electric gate-controlled switch and circuit breaker;
After said input voltage detection circuit detects the input voltage of generator, send to said control module, said control module is controlled the disconnection and the closure of said electric gate-controlled switch according to the detected value of input voltage, the switch of said electric gate-controlled switch control circuit breaker; When said detected value during greater than preset voltage threshold, to control said electric gate-controlled switch and break off, circuit breaker breaks off; When said detected value was less than or equal to preset voltage threshold, it was closed to control said electric gate-controlled switch, and circuit breaker is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200920471U CN202564925U (en) | 2012-03-13 | 2012-03-13 | Input overcurrent overvoltage protector used for frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200920471U CN202564925U (en) | 2012-03-13 | 2012-03-13 | Input overcurrent overvoltage protector used for frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202564925U true CN202564925U (en) | 2012-11-28 |
Family
ID=47214540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200920471U Expired - Fee Related CN202564925U (en) | 2012-03-13 | 2012-03-13 | Input overcurrent overvoltage protector used for frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202564925U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880219A (en) * | 2018-06-27 | 2018-11-23 | 北京金风科创风电设备有限公司 | Circuit protection device and variable pitch system |
| CN115441400A (en) * | 2021-06-01 | 2022-12-06 | 上海正泰智能科技有限公司 | Protection circuit of switch electric appliance, breaker and protection method of breaker |
-
2012
- 2012-03-13 CN CN2012200920471U patent/CN202564925U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880219A (en) * | 2018-06-27 | 2018-11-23 | 北京金风科创风电设备有限公司 | Circuit protection device and variable pitch system |
| CN115441400A (en) * | 2021-06-01 | 2022-12-06 | 上海正泰智能科技有限公司 | Protection circuit of switch electric appliance, breaker and protection method of breaker |
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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: 20121128 Termination date: 20200313 |