CN203961717U - A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function - Google Patents
A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function Download PDFInfo
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- CN203961717U CN203961717U CN201420374765.7U CN201420374765U CN203961717U CN 203961717 U CN203961717 U CN 203961717U CN 201420374765 U CN201420374765 U CN 201420374765U CN 203961717 U CN203961717 U CN 203961717U
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 71
- 238000001514 detection method Methods 0.000 title abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 3
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- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004079 fireproofing Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function, include the circuit of testing the phase sequence and the phase sequence Circuit tuning that connect in turn, circuit of testing the phase sequence input is connected in power supply, phase sequence Circuit tuning connects controls fire curtain door motor, described circuit of testing the phase sequence is by single-chip microcomputer, phase sequence test section and phase shortage test section composition, phase sequence test section is made up of bleeder circuit and the first comparator circuit, phase shortage test section is made up of RC circuit and the second comparator circuit, the signal output part of phase sequence test section is connected to the signal input part of phase shortage test section.The utility model can detect phase sequence automatically by circuit of testing the phase sequence; then pass through phase sequence Circuit tuning; can ensure that the rotation direction of motor is constant and protect motor; reach the object that fire curtain can not cause because of three-phase phase sequence wrong fire resistance rolling shutter door to damage; circuit structure is simple; easily manufactured, can greatly improve interference free performance and the accuracy of detection.
Description
Technical field
The utility model relates to a kind of electric machine controller, particularly a kind of fire-proof roll screen control that has the automatic detection of phase sequence and adjust function.
Background technology
Fire resistance rolling shutter door is indispensable fireproofing in modern high-rise building; fire resistance rolling shutter door is except possessing the effect of common door; also there is fire prevention, every cigarette, suppress the specific function of fire spread, protection evacuating personnel, in the intensive occasion of the personnel such as highrise building, megastore, be widely used.Fire resistance rolling shutter door critical piece is the motor that can drive spool, hereinafter to be referred as motor.
The required working power of motor is alternating current 380V on the market at present, for motor can be turned round according to normal direction, just must ensure that the phase sequence of three-phase electricity input is correct.The phase sequence of three phase mains is easy to connect instead, connects and instead can cause a body to damage or accident, now just needs to readjust the wiring of controller inside, so not only causes the waste of installation work-hour, also can cause unnecessary loss.In order to make motor turn round normally, three phase mains is detected and seems and be even more important.And the large heaviness of the circuit of testing the phase sequence of existing fire-proof roll screen control or body, or be easily disturbed, complex structure, the accuracy of detection is poor.
Utility model content
Main purpose of the present utility model is the shortcoming that overcomes prior art; provide one can protect fire curtain door motor; ensure that fire resistance rolling shutter door can not cause because of three-phase phase sequence wrong damaging; circuit structure is simple, and can greatly improve the interference free performance of detection and the fire-proof roll screen control with the automatic detection of phase sequence and adjustment function of accuracy.
The utility model adopts following technical scheme:
A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function, include the circuit of testing the phase sequence and the phase sequence Circuit tuning that connect in turn, circuit of testing the phase sequence input is connected in power supply, phase sequence Circuit tuning connects controls fire curtain door motor, described circuit of testing the phase sequence is by single-chip microcomputer, phase sequence test section and phase shortage test section composition, phase sequence test section is made up of bleeder circuit and the first comparator circuit, phase shortage test section is made up of RC circuit and the second comparator circuit, the signal output part of phase sequence test section is connected to the signal input part of phase shortage test section.
Further, described the first comparator circuit adopts the zero-crossing comparator being made up of LM339, for the three-phase sine-wave through dividing potential drop is shaped to three-phase square wave signal.
Further, the signal output part of described the first comparator circuit is connected to the signal input part of RC circuit, through RC circuit, the three-phase square wave signal shaping of the first comparator circuit output is become to sawtooth waveforms.
Further, described the second comparator circuit is made up of LM339, for the sawtooth waveforms of RC circuit output is shaped to square-wave signal.
Further, the output signal of described phase sequence test section and phase shortage test section is all delivered to the input port of single-chip microcomputer through photoisolator.
From above-mentioned to description of the present utility model; compared with prior art; the beneficial effects of the utility model are: can use the method for digit phase detection and phase-frequency conversion automatically to detect phase sequence by circuit of testing the phase sequence; then pass through phase sequence Circuit tuning; can ensure that the rotation direction of motor is constant and protect motor; reach the object that fire curtain can not cause because of three-phase phase sequence wrong fire resistance rolling shutter door to damage; circuit structure is simple; easily manufactured, and can greatly improve interference free performance and the accuracy of detection.
Brief description of the drawings
Fig. 1 is the overall structure block diagram of the utility model detailed description of the invention;
Fig. 2 is the circuit diagram of the circuit of testing the phase sequence of the utility model detailed description of the invention;
The three-phase voltage oscillogram of circuit of testing the phase sequence output when Fig. 3 is positive phase sequence;
Fig. 4 is the output waveform figure of the lack detection circuit of the utility model detailed description of the invention.
In figure: 1. circuit of testing the phase sequence, 10. single-chip microcomputer, 11. phase sequence test sections, 110. bleeder circuits, 111. first comparator circuits, 12. phase shortage test sections, 120.RC circuit, 121. second comparator circuits, 2. phase sequence Circuit tuning, 3. three phase mains, 4. fire curtain door motor.
Detailed description of the invention
Below by detailed description of the invention, the utility model will be further described.
Referring to figs. 1 through Fig. 4, a kind of automatic fire-proof roll screen control that detects and adjust function of phase sequence that has of the present utility model, include the circuit of testing the phase sequence 1 and the phase sequence Circuit tuning 2 that connect in turn, circuit of testing the phase sequence 1 input is connected in three phase mains 3, phase sequence Circuit tuning 2 connects controls fire curtain door motor 4, described circuit of testing the phase sequence 1 is by single-chip microcomputer 10, phase sequence test section 11 and phase shortage test section 12 form, phase sequence test section 11 is made up of bleeder circuit 110 and the first comparator circuit 111, phase shortage test section 12 is made up of RC circuit 120 and the second comparator circuit 121, the signal output part of phase sequence test section 11 is connected to the signal input part of phase shortage test section 12.The output signal of described phase sequence test section 11 and phase shortage test section 12 is all delivered to the input port of single-chip microcomputer 10 through photoisolator.
Described the first comparator circuit 111 adopts the zero-crossing comparator being made up of LM339, for the three-phase sine-wave through dividing potential drop is shaped to three-phase square wave signal.The signal output part of described the first comparator circuit 111 is connected to the signal input part of RC circuit 120, and the three-phase square wave signal shaping of the first comparator circuit 111 being exported through RC circuit 120 becomes sawtooth waveforms.Described the second comparator circuit 121 is made up of LM339, is shaped to square-wave signal for the sawtooth waveforms that RC circuit 120 is exported.
Referring to figs. 1 through Fig. 4, when the utility model work, first three-phase mains voltage is delivered to the first comparator circuit 111 after bleeder circuit 110 dividing potential drops, the three-phase sine-wave through dividing potential drop is shaped to three-phase square wave signal by the zero-crossing comparator being made up of LM339, delivers to single-chip microcomputer 10 input ports after photoisolator.As the three-phase voltage waveform after shaping sent into the low three of single-chip microcomputer 10P1 mouth, the phase sequence of three-phase mains voltage can directly just can be detected by the state of sampling P1 mouth.If the phase sequence of three-phase mains voltage is positive phase sequence, the data order that P1 mouth detects should be 5-4-6-2-3-1-5, as shown in Figure 3; If the phase sequence of three-phase mains voltage is negative-phase sequence, the data order that P1 mouth detects should be 5-1-3-2-6-4-5; The non-above two kinds of orders of data that P1 mouth detects are invalid interfering signal.Simultaneously, if the data that P1 mouth detects are 0 or 7, it is phase shortage, but owing to being often connected to motor even load on three phase mains 3, the effect of responding to by loading coil, may work as phase shortage generation time, the data that P1 mouth detects not are 0 or 7, now, need carry out phase shortage detection by lack detection circuit 12.
In lack detection circuit 12, due to the effect that discharges and recharges of RC circuit 120, what make that the inverting input of the second comparator circuit 121 obtains is a sawtooth waveforms (discharge and recharge resistance by adjustment and can adjust rising and falling edges width), then is shaped to square-wave signal input single-chip microcomputer 10 by the second comparator circuit 121.Bleeder circuit 110 provides the trigging signal of comparator.While generation due to phase shortage, 3 phase places will great changes will take place for three phase mains, and great changes will take place to cause RC circuit 120 to discharge and recharge the time.Actual measurement obtains, and lack detection circuit 12 is not exported the square-wave signal of 50Hz when phase shortage, and lack detection circuit 12 is exported the square-wave signal of about 150Hz when phase shortage.Therefore, computer just can judge whether phase shortage by the change of frequency that detects this circuit output signal.Because lack detection circuit 12 input signals are taken from circuit of testing the phase sequence 11 outputs, be the square-wave signal of DC12V, therefore, the impact that not changed by supply voltage amplitude.Meanwhile, RC circuit 120 itself just forms a low pass filter, can filter most of higher hamonic waves, and interfering signal is suppressed.In addition, when phase shortage the variation of frequency very large, the low-frequency disturbance of limited number of time also can be by effective filtering like this, and the reliability of circuit is greatly improved.
Meanwhile, in order to improve the noiseproof feature of equipment, the utility model has also adopted digital filtering technique; In order to improve the reliability of equipment, the utility model has designed open-phase protection.
Above are only a detailed description of the invention of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection domain.
Claims (5)
1. one kind has the automatic fire-proof roll screen control that detects and adjust function of phase sequence, it is characterized in that: include the circuit of testing the phase sequence and the phase sequence Circuit tuning that connect in turn, circuit of testing the phase sequence input is connected in power supply, phase sequence Circuit tuning connects controls fire curtain door motor, described circuit of testing the phase sequence is by single-chip microcomputer, phase sequence test section and phase shortage test section composition, phase sequence test section is made up of bleeder circuit and the first comparator circuit, phase shortage test section is made up of RC circuit and the second comparator circuit, the signal output part of phase sequence test section is connected to the signal input part of phase shortage test section.
2. a kind of automatic fire-proof roll screen control that detects and adjust function of phase sequence that has as claimed in claim 1, it is characterized in that: described the first comparator circuit adopts the zero-crossing comparator being made up of LM339, for the three-phase sine-wave through dividing potential drop is shaped to three-phase square wave signal.
3. a kind of automatic fire-proof roll screen control that detects and adjust function of phase sequence that has as claimed in claim 2, it is characterized in that: the signal output part of described the first comparator circuit is connected to the signal input part of RC circuit, through RC circuit, the three-phase square wave signal shaping of the first comparator circuit output is become to sawtooth waveforms.
4. a kind of automatic fire-proof roll screen control that detects and adjust function of phase sequence that has as claimed in claim 3, is characterized in that: described the second comparator circuit is made up of LM339, for the sawtooth waveforms of RC circuit output is shaped to square-wave signal.
5. a kind of automatic fire-proof roll screen control that detects and adjust function of phase sequence that has as claimed in claim 1, is characterized in that: the output signal of described phase sequence test section and phase shortage test section is all delivered to the input port of single-chip microcomputer through photoisolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374765.7U CN203961717U (en) | 2014-07-08 | 2014-07-08 | A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374765.7U CN203961717U (en) | 2014-07-08 | 2014-07-08 | A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function |
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| Publication Number | Publication Date |
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| CN203961717U true CN203961717U (en) | 2014-11-26 |
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| CN201420374765.7U Active CN203961717U (en) | 2014-07-08 | 2014-07-08 | A kind of fire-proof roll screen control that there is the automatic detection of phase sequence and adjust function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN108953207A (en) * | 2018-07-27 | 2018-12-07 | 廊坊市骏成消防技术咨询服务有限公司 | A kind of blower reversal protection control device |
-
2014
- 2014-07-08 CN CN201420374765.7U patent/CN203961717U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105992417A (en) * | 2015-02-04 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit for electric cooking device, and electric cooking device |
| CN105992417B (en) * | 2015-02-04 | 2024-04-16 | 佛山市顺德区美的电热电器制造有限公司 | Heating control circuit of electric cooker and electric cooker |
| CN108953207A (en) * | 2018-07-27 | 2018-12-07 | 廊坊市骏成消防技术咨询服务有限公司 | A kind of blower reversal protection control device |
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