CN204886144U - Be used for preventing protection device of converter input/output misconnection - Google Patents
Be used for preventing protection device of converter input/output misconnection Download PDFInfo
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- CN204886144U CN204886144U CN201520453843.7U CN201520453843U CN204886144U CN 204886144 U CN204886144 U CN 204886144U CN 201520453843 U CN201520453843 U CN 201520453843U CN 204886144 U CN204886144 U CN 204886144U
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- frequency converter
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- voltage level
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Abstract
The utility model provides a be used for preventing protection device of converter input/output misconnection. Protection device includes signal detector and microcontroller. The signal detector is connected in at least one output of converter for detect at least one output signal of converter, and produce at least one detected signal. Microcontroller connects in at least one output of signal detector for the voltage level of the detected signal of detected signal detector, only when microcontroller detected the detected signal all for a voltage level, it was correct to judge just that converter input/output connects, and output enable signal gives the converter, makes the converter normally start shooting, when microcontroller detect the detected signal at least one when being the 2nd voltage level, then judge converter input/output misconnection, does not export enable signal and give the converter, make the unable start of converter. The utility model discloses can realize when carrying out the converter distribution, just can make the normal effect of starting shooting of converter after must going on correctly connecting.
Description
Technical field
The utility model relates to a kind of protective device, and particularly a kind of in order to prevent the protective device of frequency converter input and output misconnection.
Background technology
Frequency converter is the one of adjustable-speed drive system, frequency and the amplitude that application variable-frequency driving technique changes alternating current motor operating voltage, and converter technology and electron electric power have substantial connection, comprise semiconductor switch element, frequency converter topology, control and analogue technique and control the progress etc. of hardware and firmware.Being of wide application of frequency converter, all has from small household appliances to large-scale mining site grinder and compressor.
But, if careless by input and output misconnection, the damage of frequency converter can be caused after frequency converter start, and have the danger of immediacy.Cause the reason of input and output misconnection may be that input and output design on same distribution terminal platform by the distribution terminal platform of frequency converter usually, the situation of misconnection easily can occur when connecting.In addition, the source terminal equipment of input terminal and lead-out terminal and apparatus of output terminal usually and frequency converter apart from far, cannot according to source terminal equipment or apparatus of output terminal be simple and easy distinguishes input terminal and lead-out terminal.Moreover input terminal and lead-out terminal are usually also without the design preventing misconnection.Based on above reason, once there is the situation of input and output misconnection, after frequency converter start, frequency converter just can damage immediately, and whole system cannot be operated, and can cause distribution personnel danger immediately.
Summary of the invention
The utility model embodiment provides a kind of in order to prevent the protective device of frequency converter input and output misconnection.Described protective device comprises signal detector and microcontroller.Signal detector is connected to multiple outputs of frequency converter, in order to detect multiple output signals of frequency converter, and produces multiple detection signal.Microcontroller is connected to multiple outputs of signal detector, in order to the voltage level of multiple detection signals of detection signal detector, when microcontroller detects that multiple detection signal is all the first voltage level, just can judge that frequency converter input and output connect correct, output enable signal, to frequency converter, makes frequency converter can normal boot-strap; When microcontroller detects in multiple detection signal, when wherein at least one is the second voltage level, then judge frequency converter input and output misconnection, output enable signal is not to frequency converter, and frequency converter cannot be started shooting.
Another embodiment of the utility model provides a kind of in order to prevent the protective device of frequency converter input and output misconnection.Described protective device comprises signal detector and microcontroller.Signal detector is connected at least one output of frequency converter, in order to detect at least one output signal of frequency converter, and produces detection signal.Microcontroller is connected to the output of signal detector, in order to the voltage level of the detection signal of detection signal detector, when microcontroller detects that detection signal is the first voltage level, just can judge that frequency converter input and output connect correct, output enable signal, to frequency converter, makes frequency converter can normal boot-strap; When microcontroller detects that detection signal is the second voltage level, then judge frequency converter input and output misconnection, output enable signal is not to frequency converter, and frequency converter cannot be started shooting.
In one of them embodiment of the utility model, above-mentioned signal detector comprises photocoupling test device.
In one of them embodiment of the utility model, above-mentioned photocoupling test device comprises optical transmitting set and photodetector.
In one of them embodiment of the utility model, above-mentioned optical transmitting set comprises light-emittingdiode.
In one of them embodiment of the utility model, above-mentioned photodetector comprises photodiodes or photoelectric crystal.
In one of them embodiment of the utility model, above-mentioned signal detector comprises bridge rectifier and resistor current testing circuit.
In one of them embodiment of the utility model, above-mentioned signal detector comprises mixer circuit and low-pass filter circuit.
In one of them embodiment of the utility model, above-mentioned microcontroller can be use single-chip, signal processor, signal comparator circuit etc., can also be original control wafer in frequency converter.As long as can judge that also output enable signal is to frequency converter according to the detection signal of above-mentioned signal detector.
In one of them embodiment of the utility model, above-mentioned first voltage level and the second voltage level are different voltage level.
In one of them embodiment of the utility model, signal detector comprises at least one photocoupling test device, wherein photocoupling test device comprises: one first resistance, its one end is connected to one first output in multiple outputs of frequency converter, to receive one first output signal in multiple output signals of frequency converter; One second resistance, its one end is connected to one second output in multiple outputs of frequency converter, to receive one second output signal in multiple output signals of frequency converter; One photo coupling detection circuit, its input is connected to the other end of the first resistance and the second resistance; And an output resistance, its one end is connected to a supply voltage, and the other end is connected to the output of photo coupling detection circuit and the input of microcontroller.
Comprehensive the above; the protective device that the utility model embodiment provides; distribution personnel can be allowed when carrying out frequency converter distribution; even if careless by after input and output misconnection; also frequency converter cannot be made to start shooting by the switch of low-converter, after must exact connect ion being carried out, just can make frequency converter normal boot-strap.
Feature of the present utility model and technology contents is further understood for enable, refer to following about detailed description of the present utility model and accompanying drawing, but these illustrate and institute's accompanying drawings is only used to the utility model is described, but not do any restriction to interest field of the present utility model.
Accompanying drawing explanation
Fig. 1 is the block schematic diagram of the protective device of the utility model embodiment.
Fig. 2 is the structural representation of the photocoupling test device of the utility model embodiment.
101,23: signal detector
103,21: microcontroller
105: frequency converter
231,233,235: photo coupling detection circuit
R
1, R
3, R
5: the first resistance
R
2, R
4, R
6: the second resistance
R
7, R
8, R
9: output resistance
VCC: supply voltage
R, S, T: inverter input
U, V, W: inverter output terminal
Embodiment
In order to avoid distribution personnel are in the situation connecting inverter input and output generation misconnection; cause the damage of frequency converter and the danger of distribution personnel after frequency converter start, the utility model embodiment provides a kind of in order to prevent the protective device of frequency converter input and output misconnection.
The signal detector of described protective device can detect at least one output of frequency converter before frequency converter start; signal detector produces at least one detection signal according at least one output signal of frequency converter, and the voltage level of the detection signal that microcontroller produces according to signal detector judges whether to want output enable signal to frequency converter.When the output that signal detector detects frequency converter does not output signal, then produce the detection signal of the first voltage level, when the output that signal detector detects frequency converter there being output signal, then what produce the second voltage level detects side signal.When microcontroller detect side be all the first voltage level to the detection signal of signal detector time, just can judge that inverter input is connected with output correctly, output enable signal, to frequency converter, makes frequency converter can normal boot-strap; When microcontroller detect side to signal detector detect side signal at least one be the second voltage level time, then judge inverter input and output misconnection, output enable signal is not to frequency converter, and frequency converter cannot be started shooting.Therefore distribution personnel in time connecting the situation of inverter input and output misconnection, even if also frequency converter normal boot-strap cannot be made by the mains switch of low-converter, the safety of protection frequency converter and distribution personnel by this.
Hereinafter, will illustrate that various embodiment of the present utility model describes protective device of the present utility model in detail by accompanying drawing.But the utility model concept may embody in many different forms, and should not be construed as and be limited to set forth exemplary embodiments herein.In addition, same reference numbers can in order to element like representation class in the drawings.
First, please refer to Fig. 1, Fig. 1 is the block schematic diagram of the protective device of the utility model embodiment.The protective device of Fig. 1 comprises signal detector 101 and microcontroller 103.Signal detector 101 links multiple outputs of frequency converter 105, in order to detect multiple output signals of frequency converter 105 before frequency converter 105 is started shooting, and produces multiple detection signal.Microcontroller 103 connection signal detector 101, in order to the voltage level of multiple detection signals of detection signal detector 101, and judges whether that generation one enable signal exports frequency converter 105 to accordingly.Microcontroller 103 can be use single-chip, signal processor, signal comparator circuit etc., and can also be original control wafer in frequency converter, the utility model limit the execution mode of microcontroller 103.
Furthermore, before frequency converter 105 is started shooting, signal detector 101 detects the multiple output signals on multiple outputs of frequency converter 105, produces multiple detection signal accordingly.Then, the voltage level of multiple detection signals of microcontroller 103 detection signal detector 101, judge whether frequency converter 105 is input and output misconnection situation accordingly, and determine whether output enable signal is to frequency converter 105, frequency converter 105 can maybe cannot be started shooting by normal boot-strap.Output signal on the output of frequency converter 105 can be voltage signal, and the utility model is not as limit.
For example, before frequency converter 105 is started shooting, if signal detector 101 frequency converter 105 detected any two outputs of output U, V, W on all no-voltage signals, signal detector 101 produces the detection signal of the first voltage level; On the contrary, before frequency converter 105 is started shooting, when on any two outputs of output U, V, W that signal detector 101 detects frequency converter 105, at least one has voltage signal, signal detector 101 produces the detection signal of the second voltage level accordingly.Then, when microcontroller 103 detects that multiple detection signals that signal detector 101 produces are all the first voltage level, just can judge that frequency converter 105 input and output do not have misconnection, and then output enable signal is to frequency converter 105, makes frequency converter 105 can normal boot-strap; On the contrary, when during microcontroller 103 detects multiple detection signals that signal detector 101 produces, at least one is the second voltage level, then judge that frequency converter 105 is as input and output misconnection, and then output enable signal, to frequency converter 105, does not make frequency converter 105 start shooting.Wherein, the first voltage level and the second voltage level are different voltage level.
In addition, signal detector 101 can comprise photocoupling test device, or comprises bridge rectifier and resistor current testing circuit, also or comprise mixer and low-pass filter circuit.Generally speaking, the utility model embodiment not type of restricting signal detector and execution mode.
For example, please refer to Fig. 2, Fig. 2 is the structural representation of the photocoupling test device of the utility model embodiment.Note that in this embodiment at this, signal detector comprises at least one photocoupling test device 23, and the utility model does not limit the quantity of photocoupling test device 23.For the leftmost one group of photocoupling test device of Fig. 2, photocoupling test device 23 comprises the first resistance R
1, the second resistance R
2, photo coupling detection circuit 231 and output resistance R
7.One of them output U and another output V of multiple outputs of frequency converter link the first resistance R respectively
1with the second resistance R
2one end, the first resistance R
1with the second resistance R
2the other end be connected to the input of photo coupling detection circuit 231, the output of photo coupling detection circuit 231 connects output resistance R
7one end and the input of microcontroller 21, output resistance R
7the other end connects supply voltage VCC.
Then, before frequency converter start, photo coupling detection circuit 231 produces detection signal by two output signals detected on the output U of frequency converter and output V, microcontroller 21 detects the voltage level of the detection signal that photo coupling detection circuit 231 produces, judge whether the input of frequency converter and output have the situation of misconnection accordingly, and then determine whether output enable signal is to frequency converter, frequency converter can maybe cannot be started shooting by normal boot-strap.
For example, before frequency converter start, if photo coupling detection circuit 231 does not detect the signal voltage of output U, V phase place of frequency converter, then photo coupling detection circuit 231 produces the detection signal of the first voltage level, now, when microcontroller 21 detects that the detection signal that photo coupling detection circuit 231 produces is the first voltage level, just can judge that inverter input and output do not have misconnection, and then output enable signal is to frequency converter, make frequency converter normal operation; On the contrary, before frequency converter start, if photo coupling detection circuit 231 detects that at least one of them has voltage signal for two output U, V of frequency converter, then photo coupling detection circuit 231 produces the detection signal of the second voltage level, when now microcontroller 21 detects that the detection signal that photo coupling detection circuit 231 produces is the second voltage level, the input and the output that then judge frequency converter are misconnection, so not output enable signal to frequency converter, to make frequency converter cannot normal boot-strap.
Separately for example, please refer to Fig. 2, before frequency converter start, when photo coupling detection circuit 231, photo coupling detection circuit 233 all produce the detection signal of the first voltage level with photo coupling detection circuit 235, the detection signal that microcontroller 21 judges photo coupling detection circuit 231, photo coupling detection circuit 233 produces with photo coupling detection circuit 235 is all the first voltage level, then judge that inverter input and output do not have misconnection, and then output enable signal is to frequency converter, make frequency converter normal operation; On the contrary, when at least one of them produces the detection signal of the second voltage level with photo coupling detection circuit 235 for photo coupling detection circuit 231, photo coupling detection circuit 233, at least one of them is the second voltage level to the detection signal that microcontroller 21 detects photo coupling detection circuit 231, photo coupling detection circuit 233 produces with photo coupling detection circuit 235, the input and the output that then judge frequency converter are misconnection, and then not output enable signal to frequency converter, to make frequency converter cannot normal boot-strap.
In addition, photo coupling detection circuit 231, photo coupling detection circuit 233 can be made up of optical transmitting set and photodetector with photo coupling detection circuit 235, optical transmitting set produces luminous signal in order to the output signal according to this inverter output terminal, the luminous signal that photodetector produces in order to receive optical transmitting set, wherein optical transmitting set can comprise light-emittingdiode, and photodetector can comprise photodiodes or photoelectric crystal.Combination and the element of photo coupling detection circuit 231, photo coupling detection circuit 233 and photo coupling detection circuit 235 are all known, and it will be appreciated by those skilled in the art that, impartial and tool to be to implement.
The utility model separately provides the embodiment of a protective device; protective device comprises signal detector and microcontroller; signal detector links at least one output of frequency converter, in order to detect at least one output signal of frequency converter before frequency converter start, and produces a detection signal.Microcontroller connection signal detector, in order to the voltage level of the detection signal of detection signal detector, and judges whether that generation one enable signal exports frequency converter to accordingly.Microcontroller can be use single-chip, signal processor, signal comparator circuit etc., and can also be original control wafer in frequency converter, the utility model limit the execution mode of microcontroller.
Furthermore, before frequency converter start, signal detector detects at least one output signal at least one output of frequency converter, produces detection signal accordingly.Then, the voltage level of the detection signal of microcontroller detection signal detector, judges whether frequency converter is input and output misconnection situation accordingly, and determines whether output enable signal is to frequency converter, frequency converter can maybe cannot be started shooting by normal boot-strap.Output signal on the output of frequency converter can be voltage signal, and the utility model is not as limit.
For example, before frequency converter start, if signal detector detects output all no-voltage signals of frequency converter, signal detector then produces the detection signal of the first voltage level; On the contrary, before frequency converter start, when at least one output of output that signal detector detects frequency converter has voltage signal, signal detector then produces the detection signal of the second voltage level accordingly.Then, when microcontroller detects that the detection signal that signal detector produces is the first voltage level, just can judge that inverter input and output do not have misconnection, and then output enable signal is to frequency converter, makes frequency converter can normal boot-strap; On the contrary, when microcontroller detects that the detection signal that signal detector produces is the second voltage level, then judge that frequency converter is input and output misconnection, and then output enable signal, to frequency converter, does not make frequency converter start shooting.Wherein, the first voltage level and the second voltage level are different voltage level.
In sum; what the utility model embodiment provided prevents the protective device of frequency converter input and output misconnection from can allow distribution personnel when connection inverter input and output have the situation of misconnection; even if also frequency converter normal boot-strap cannot be made by the mains switch of low-converter, protect the safety of frequency converter and distribution personnel by this.
The foregoing is only embodiment of the present utility model, it is also not used to limit to the scope of the claims of the present utility model.
Claims (6)
1. in order to prevent a protective device for frequency converter input and output misconnection, it is characterized in that, comprising:
One signal detector, is connected to multiple outputs of frequency converter, in order to detect multiple output signals of described frequency converter, and produces multiple detection signal; And
One microcontroller, is connected to multiple outputs of described signal detector, in order to detect the voltage level of described multiple detection signal that described signal detector produces;
Wherein, when described microcontroller detects that described multiple detection signal is all the first voltage level, just can export an enable signal to described frequency converter, when described microcontroller detects described multiple detection signal at least one of them is the second voltage level, then do not export described enable signal to described frequency converter, wherein the first voltage level and the second voltage level are different voltage level.
2. protective device as claimed in claim 1; it is characterized in that; when described signal detector detects described multiple output of described frequency converter wherein any two does not all output signal; then produce the detection signal of the first voltage level; when on described multiple output that described signal detector detects described frequency converter wherein any two at least one of them has an output signal time, then produce the detection signal of the second voltage level.
3. protective device as claimed in claim 1, it is characterized in that, described signal detector comprises multiple photocoupling test device, and wherein said photocoupling test device comprises:
One first resistance, its one end is connected to one first output in described multiple output of described frequency converter, to receive one first output signal in described multiple output signal of described frequency converter;
One second resistance, its one end is connected to one second output in described multiple output of described frequency converter, to receive one second output signal in described multiple output signal of described frequency converter;
One photo coupling detection circuit, its input is connected to the other end of described first resistance and described second resistance; And
One output resistance, its one end is connected to a supply voltage, and the other end is connected to the output of described photo coupling detection circuit and the input of described microcontroller.
4. in order to prevent a protective device for frequency converter input and output misconnection, it is characterized in that, comprising:
One signal detector, is connected at least one output of frequency converter, in order to detect at least one output signal of described frequency converter, and produces a detection signal; And
One microcontroller, is connected to the output of described signal detector, in order to detect the voltage level of the described detection signal that described signal detector produces;
Wherein, when described microcontroller detects that described detection signal is the first voltage level, just can export an enable signal to described frequency converter, when described microcontroller detects that described detection signal is the second voltage level, then do not export described enable signal to described frequency converter, wherein the first voltage level and the second voltage level are different voltage level.
5. protective device as claimed in claim 4; it is characterized in that; when described multiple output that described signal detector detects described frequency converter does not all output signal; then produce the detection signal of the first voltage level; when at least one of them has an output signal on described multiple output that described signal detector detects described frequency converter, then produce the detection signal of the second voltage level.
6. protective device as claimed in claim 4, it is characterized in that, described signal detector comprises at least one photocoupling test device, and wherein said photocoupling test device comprises:
One first resistance, its one end is connected to one first output in described multiple output of described frequency converter, to receive one first output signal in described multiple output signal of described frequency converter;
One second resistance, its one end is connected to one second output in described multiple output of described frequency converter, to receive one second output signal in described multiple output signal of described frequency converter;
One photo coupling detection circuit, its input is connected to the other end of described first resistance and described second resistance; And
One output resistance, its one end is connected to a supply voltage, and the other end is connected to the output of described photo coupling detection circuit and the input of described microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520453843.7U CN204886144U (en) | 2015-06-26 | 2015-06-26 | Be used for preventing protection device of converter input/output misconnection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520453843.7U CN204886144U (en) | 2015-06-26 | 2015-06-26 | Be used for preventing protection device of converter input/output misconnection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886144U true CN204886144U (en) | 2015-12-16 |
Family
ID=54830476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520453843.7U Expired - Fee Related CN204886144U (en) | 2015-06-26 | 2015-06-26 | Be used for preventing protection device of converter input/output misconnection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204886144U (en) |
-
2015
- 2015-06-26 CN CN201520453843.7U patent/CN204886144U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20210626 |