CN207752075U - A kind of detection device of fan of frequency converter failure - Google Patents
A kind of detection device of fan of frequency converter failure Download PDFInfo
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- CN207752075U CN207752075U CN201721202386.XU CN201721202386U CN207752075U CN 207752075 U CN207752075 U CN 207752075U CN 201721202386 U CN201721202386 U CN 201721202386U CN 207752075 U CN207752075 U CN 207752075U
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- fan
- frequency converter
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- resistance
- detection
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Abstract
The utility model provides a kind of detection device of fan of frequency converter failure, including fan group unit, fan driving unit, detection unit, signal amplification unit and frequency converter control panel；The fan group unit has the fan of three or three more parallels；The fan driving unit has a switch element, and the switch element is electrically connected the frequency converter control panel and fan, the switch element control the start and stop of the fan according to the signal from the frequency converter control panel is received；The detection unit has a detection resistance, and the detection resistance is used for detecting the total current for flowing through the fan group unit, and exports a voltage signal；The signal amplification unit input is terminated at the voltage signal, and exports a signal by a ratio enlargement and be delivered to the frequency converter control panel.The detection device of the utility model design carries out artificial detection without personnel so that frequency converter has the function whether fan auto-detection fails, and simplifies maintenance process.
Description
Technical field
The utility model belongs to the detection dress of frequency converter detection technique field more particularly to a kind of failure of fan of frequency converter
It sets.
Background technology
Frequency converter (Variable-frequency Drive, VFD) is to apply converter technique and microelectric technique, by changing
Become motor working power Frequency Patterns to control the electric control appliance of ac motor.Mainly by rectification, (exchange becomes frequency converter
Direct current), filtering, inversion (direct current become exchange), brake unit, driving unit, the compositions such as detection unit microprocessing unit.Frequency converter
IGBT cut-offs to adjust the voltage and frequency of out-put supply close to the inner portion, and it is required to provide its according to the actual needs of motor
Supply voltage, and then achieve the purpose that energy saving, speed governing.With the continuous improvement of industrial automatization, frequency converter also obtains
Very extensive application.
In general, multiple radiator fans can be equipped with inside frequency converter, radiate to the entirety of frequency converter.But in certain comparisons
Rugged environment inevitably will appear individual failures or fan power supply connect when cooling fan of frequency converter needs to open for a long time
Caused by mouth poor contact, this when, if frequency converter works on, internal temperature will increase, in the event of not up to temperature
In the case of barrier value, the service life of frequency converter can be shortened, and unnecessary loss is caused.Detection cooling fan of frequency converter is at present
No normal work is all the mode by maintenance staff or user's routine observation, when especially with more radiator fans, detection
Personnel are not slightly note that individual radiator fan failures will not be aware.
It is those skilled in that art's skill urgently to be resolved hurrily therefore, because above-mentioned technological deficiency exists in the prior art
Art problem.
Utility model content
The purpose of this utility model is to provide a kind of detection devices of fan of frequency converter failure, it is intended to solve the prior art
The deficiency of middle cooling fan of frequency converter detection mode can give the working condition Real-time Feedback of radiator fan group to frequency converter master control
Plate.
The utility model is realized in this way
A kind of detection device of fan of frequency converter failure, including fan group unit, fan driving unit, detection unit, letter
Number amplifying unit and frequency converter control panel；
The fan group unit has the fan of three or three more parallels；
The fan driving unit has a switch element, the switch element be electrically connected the frequency converter control panel and
Fan, the switch element control the start and stop of the fan according to the signal from the frequency converter control panel is received；
There is the detection unit detection resistance, the detection resistance to be used for detecting flowing through the total of the fan group unit
Electric current, and export a voltage signal；
The signal amplification unit input is terminated at the voltage signal, and exports signal conveying by a ratio enlargement
To the frequency converter control panel.
Preferably, the switch element in the fan driving unit includes driving resistance and NMOS transistor, described
The input terminal of driving resistance is coupled to the output end of the frequency converter control panel, and the output end of the driving resistance is coupled to described
The grid of NMOS transistor, the source electrode of the NMOS transistor are coupled to the fan of the fan group unit, the NMOS crystal
The drain electrode of pipe is coupled to the detection unit.
Preferably, the detection resistance of the detection unit is metal plate resistance, and the input terminal of the metal plate resistance is simultaneously
It is coupled to drain electrode and the input terminal of the signal amplification unit of the NMOS transistor, the output end coupling of the metal plate resistance
It is connected to ground terminal.
Preferably, the signal amplification unit includes operational amplifier and two proportion adjustment resistance, a ratio
Regulation resistance is coupled to the input terminal of the metal plate resistance and the operational amplifier, another described proportion adjustment resistance coupling
It is connected to the input terminal of the operational amplifier and the operational amplifier output terminal, the input terminal of the operational amplifier is coupled to
The metal plate resistance, the output end of the operational amplifier are coupled to the input terminal of the frequency converter control panel.
The beneficial effects of the utility model are：When radiator fan normally starts, the detection resistance detects stream
It crosses the total current of radiator fan and switchs to a voltage value, be amplified the voltage value by the signal amplification unit, send
To the frequency converter control panel, it is signal when radiator fan is normal that the frequency converter control panel, which receives this signal value,
Value.When in radiator fan there are one or when multiple failures, current value that the detection resistance detects can with it is normal when differ
Sample, to which one different voltage value of output is sent to the frequency converter control panel, the change through the signal amplification unit
When frequency device control panel detects this voltage value difference, you can controlled, carry out artificial detection without personnel so that frequency conversion utensil
The function whether standby fan auto-detection fails, simplifies maintenance process.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model；
In figure：100 be fan group unit, and 200 be driving unit, and 300 be detection unit, and 400 be signal amplification unit,
500 be frequency converter control panel.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
A kind of detection device of fan of frequency converter failure as described in Figure 1, including fan group unit 100, fan driving unit
200, detection unit 300, signal amplification unit 400 and frequency converter control panel 500；
The fan group unit 100 has the fan of three or three more parallels；
There is the fan driving unit 200 switch element, the switch element to be electrically connected the Frequency Converter Control
Plate 500 and fan, the switch element control the wind according to the signal from the frequency converter control panel 500 is received
The start and stop of fan；
There is the detection unit 300 detection resistance, the detection resistance to be used for detecting flowing through the fan group unit
100 total current, and export a voltage signal；
The input of the signal amplification unit 400 is terminated at the voltage signal, and exports a signal by a ratio enlargement
It is delivered to the frequency converter control panel 500.
Further, the switch element in the fan driving unit 200 includes driving resistance and NMOS crystal
The input terminal of pipe, the driving resistance is coupled to the output end of the frequency converter control panel 500, the output end of the driving resistance
It is coupled to the grid of the NMOS transistor, the source electrode of the NMOS transistor is coupled to the fan of the fan group unit 100,
The drain electrode of the NMOS transistor is coupled to the detection unit 300.
Further, the detection resistance of the detection unit 300 is metal plate resistance, the input of the metal plate resistance
End while drain electrode and the input terminal of the signal amplification unit 400 for being coupled to the NMOS transistor, the metal plate resistance
Output end be coupled to ground terminal.
Further, the signal amplification unit 400 includes operational amplifier and two proportion adjustment resistance, an institute
The input terminal that proportion adjustment resistance is coupled to the metal plate resistance and the operational amplifier is stated, another described proportion adjustment
Resistance is coupled to the input terminal of the operational amplifier and the operational amplifier output terminal, the input terminal of the operational amplifier
It is coupled to the metal plate resistance, the output end of the operational amplifier is coupled to the input terminal of the frequency converter control panel 500.
In the present embodiment, when radiator fan normally starts, the detection resistance, which detects, flows through radiator fan
Total current simultaneously switchs to a voltage value, is amplified the voltage value by the signal amplification unit 400, is sent to the frequency conversion
Device control panel 500, it is signal value when radiator fan is normal that the frequency converter control panel 500, which receives this signal value,.When
In radiator fan there are one or when multiple failures, current value that the detection resistance detects can with it is normal when it is different, from
And it exports a different voltage value and is sent to the frequency converter control panel 500, the change through the signal amplification unit 400
When frequency device control panel 500 detects this voltage value difference, you can controlled, carry out artificial detection without personnel so that frequency conversion
Device has the function whether fan auto-detection fails.
Specifically, as shown in Fig. 2, frequency converter control panel 500, which sends out drive signal, is given to fan driving unit 200, FAN points
Voltage becomes high level, and NMOS transistor Q1 is open-minded, and+24V source currents flow through fan group unit 100, passes through NMOS crystalline substances
Body pipe Q1 finally flows into ground terminal, while the metal plate resistance R2 input terminals can export one using metal plate resistance R2
Voltage signal.The signal amplification unit 400 obtains after receiving the voltage signal after proportionally R4/R3 is amplified
To voltage signal VTH, which is finally received by frequency converter control panel 500, i.e., can carry out software detection.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly
The limitation of type protection domain, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel would not require any inventive effort the various modifications or changes that can be made still in the protection of the utility model
Within the scope of.
Claims (4)
1. a kind of detection device of fan of frequency converter failure, it is characterised in that：Including fan group unit, fan driving unit, inspection
Survey unit, signal amplification unit and frequency converter control panel；
The fan group unit has the fan of three or three more parallels；
There is the fan driving unit switch element, the switch element to be electrically connected the frequency converter control panel and wind
Fan, the switch element control the start and stop of the fan according to the signal from the frequency converter control panel is received；
There is the detection unit detection resistance, the detection resistance to be used for detecting the total electricity for flowing through the fan group unit
Stream, and export a voltage signal；
The signal amplification unit input is terminated at the voltage signal, and exports a signal by a ratio enlargement and be delivered to institute
State frequency converter control panel.
2. a kind of detection device of fan of frequency converter failure as described in claim 1, it is characterised in that：The fan driving is single
The switch element in member includes driving resistance and NMOS transistor, and the input terminal of the driving resistance is coupled to the frequency conversion
The output end of the output end of device control panel, the driving resistance is coupled to the grid of the NMOS transistor, the NMOS crystal
The source electrode of pipe is coupled to the fan of the fan group unit, and the drain electrode of the NMOS transistor is coupled to the detection unit.
3. a kind of detection device of fan of frequency converter failure as claimed in claim 2, it is characterised in that：The detection unit
Detection resistance is metal plate resistance, and the input terminal of the metal plate resistance is coupled to drain electrode and the institute of the NMOS transistor simultaneously
The input terminal of signal amplification unit is stated, the output end of the metal plate resistance is coupled to ground terminal.
4. a kind of detection device of fan of frequency converter failure as claimed in claim 3, it is characterised in that：The signal amplification is single
Member include operational amplifier and two proportion adjustment resistance, the proportion adjustment resistance be coupled to the metal plate resistance and
The input terminal of the operational amplifier, another described proportion adjustment resistance are coupled to input terminal and the institute of the operational amplifier
Operational amplifier output terminal is stated, the input terminal of the operational amplifier is coupled to the metal plate resistance, the operational amplifier
Output end be coupled to the input terminal of the frequency converter control panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202386.XU CN207752075U (en) | 2017-09-19 | 2017-09-19 | A kind of detection device of fan of frequency converter failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202386.XU CN207752075U (en) | 2017-09-19 | 2017-09-19 | A kind of detection device of fan of frequency converter failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207752075U true CN207752075U (en) | 2018-08-21 |
Family
ID=63146751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721202386.XU Active CN207752075U (en) | 2017-09-19 | 2017-09-19 | A kind of detection device of fan of frequency converter failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207752075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589327A (en) * | 2017-09-19 | 2018-01-16 | 天津康途科技有限公司 | A kind of detection means of fan of frequency converter failure |
-
2017
- 2017-09-19 CN CN201721202386.XU patent/CN207752075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589327A (en) * | 2017-09-19 | 2018-01-16 | 天津康途科技有限公司 | A kind of detection means of fan of frequency converter failure |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200624 Address after: 300380 Tianjin city Xiqing District Yangliuqing town Liu Yilu No. 20 Patentee after: GORE ELEVATOR (TIANJIN) Co.,Ltd. Address before: 300380 Tianjin Xiqing District Tianjin Xiqing District Xinkou town Jinjing Road double track and the west side of Taihua Road intersection 50 meters Patentee before: TIANJIN KANGTU TECHNOLOGY Co.,Ltd. |