CN1153307A - Under-voltage timing method and under-voltage timing device thereby - Google Patents
Under-voltage timing method and under-voltage timing device thereby Download PDFInfo
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- CN1153307A CN1153307A CN 95121809 CN95121809A CN1153307A CN 1153307 A CN1153307 A CN 1153307A CN 95121809 CN95121809 CN 95121809 CN 95121809 A CN95121809 A CN 95121809A CN 1153307 A CN1153307 A CN 1153307A
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Abstract
A under-voltage time count method and its device feature that the phases of three phase voltages are mutually compared to obtain their phase differences, and when the phase difference between any two phase voltages is greater than 150 deg. under-voltage condition is determined and under-voltage time count begins.
Description
The present invention relates to a kind of decompression clocking method, also relate to a kind of decompression time set that uses this method, be used to measure the three-phase supply interruption phase time industrial.
In the prior art, at present used decompression time set mostly adopts the amplitude method to differentiate decompression.When the amplitude that promptly ought record a certain phase (or two-phase, or three-phase) voltage is lower than a certain predetermined value (for example 80% of ratings), be judged to this phase voltage decompression (phase failure).This method exists a significant disadvantages to be: when line voltage descends or load when significantly increasing (especially power shortage area) and causing that regional voltage magnitude descends, adopt the decompression timer of this method to judge by accident and be decompression, and only actually is voltage decline, decompression does not take place, thereby the generation metering is incorrect.
The object of the present invention is to provide a kind of can correctly judge certain phase voltage whether decompression (or phase failure) the decompression clocking method and make the decompression time set that carries out the decompression timing in this way, thereby can make correct record to phase failure situation.
Because when certain phase decompression, except this phase voltage descends, three-phase imbalance takes place simultaneously also, promptly the phase differential between the three-phase voltage obviously departs from normal value, 120 degree.And because of line voltage descends or power shortage when causing that regional voltage magnitude descends, be that three-phase voltage descends together because this voltage descends, so three-phase voltage balance still, the phase differential between the three-phase voltage still is 120 degree.Therefore, utilize phase place whether to differentiate decompression, Billy differentiates decompression with amplitude and comes more accurately.
Therefore, decompression clocking method the following step of the present invention,
The phase place of three phase voltages is compared mutually, obtain described three phase voltages phase differential each other;
When the phase differential of the wherein any two-phase in described three phase voltages is spent greater than 150, be judged as another phase decompression, carry out the decompression timing.
According to said method, the present invention also provides a kind of decompression time set, and it comprises:
Phase difference detector is used to detect three phase voltages phase differential each other;
The timing drive device links to each other with described phase difference detector, in the phase differential between described three phase voltages of described phase difference detector output, when the phase differential of wherein any two phase voltages is spent greater than 150, exports the decompression timing drive signal of another phase;
Decompression timing and display link to each other with described timing drive device, and the decompression timing drive signal according to described timing drive device output carries out the timing of phase-splitting decompression.
Describe embodiments of the invention below with reference to accompanying drawings in detail, and can further understand above-mentioned purpose of the present invention from the following description, and advantage of the present invention and effect.
Fig. 1 is the process flow diagram of decompression clocking method of the present invention;
Fig. 2 is the block scheme of the decompression time set of the described method of use Fig. 1 of the present invention;
Fig. 3 is a kind of concrete circuit diagram of block scheme shown in Figure 2;
Fig. 4 is the circuit diagram of the another kind of embodiment of the phase difference detector among Fig. 2.
As shown in Figure 1, Fig. 1 shows the process flow diagram of decompression clocking method of the present invention.In the drawings, step 10,20 and 30, three phase voltages of three-phase voltage respectively with a reference voltage, as the mid-point voltage of three-phase electricity, make comparisons, promptly in step 10, at first first phase voltage and reference voltage are compared, if first phase voltage is greater than reference voltage, then flow process enters step 15, with two timers, first and second timers pick up counting, flow process enters step 20 then, if be not more than reference voltage in step 10 first phase voltage, then flow process is returned step 10.Enter after the step 20, second phase voltage and reference voltage are compared, if second phase voltage is greater than reference voltage, then flow process enters step 25, make first timer of opening as timing in step 15 stop timing, flow process enters step 30 then, if be not more than reference voltage in step 20 second phase voltage, then flow process is returned step 20.Enter after the step 30, third phase voltage and reference voltage are compared, if third phase voltage is not more than reference voltage, then flow process is returned step 30; If third phase voltage is greater than reference voltage, then flow process enters step 35, make second timer that picks up counting in step 15 stop timing, flow process enters step 40 then, calculates three phase voltages phase differential each other with the count value of first and second timers.The calculating of phase differential can followingly be carried out: first timer is write down is mistiming T12 between first phase voltage and second phase voltage, at present, the frequency of the alternating current that the electric system of China is used is 50Hz, so the phase differential between first phase voltage and second phase voltage is θ 12=50Hz*2 π * T12.For example, T12 is 6ms, and then the phase differential between first phase voltage and second phase voltage is 0.6 π, i.e. 108 degree.Phase differential between phase differential between second phase voltage and the third phase voltage and third phase voltage and first phase voltage calculates with similar methods.
Calculate after three phase voltages phase differential each other, flow process enters step 50, differentiate in step 50, three phase differential θ 12 that calculate in the step 40, whether spend among θ 23 and the θ 31 greater than 150, if the value that a phase differential (as θ 12) is wherein arranged is greater than 150 degree, then judge and form relative another phase voltage (third phase voltage) decompression of two phase voltages (first phase voltage and second phase voltage) of this phase differential (θ 12), drive timer (as third phase decompression timer) in step 60 this phase (third phase voltage) is carried out decompression timing and demonstration.If there is not phase differential to exceed this scope, after then flow process reinitializes, as carry out returning step 10 after the counter reset etc., repeat said procedure.
For the standard of comparison in the step 10,20 and 30, can use standard greater than reference voltage, also can use standard less than reference voltage, the effect of this two standards is consistent.
In the present embodiment, step 10 is to 40 three phase voltages phase differential each other that are used to detect three-phase voltage.In further embodiments, also can detect three phase voltages phase differential each other such as methods such as phase demodulations.
The present invention also provides a kind of decompression time set that uses said method.Fig. 2 shows the block scheme of a kind of embodiment of the decompression time set that uses said method.As shown in Figure 2, in the present embodiment, the decompression time set comprises three voltage comparators: first voltage comparator 11, second voltage comparator 12 and tertiary voltage comparer 13.Three phase voltage Ua, Ub of three-phase voltage and Uc import an input end of three comparers 11,12 and 13 respectively.Three voltage comparators 11,12 and another input end input reference voltage of 13.The decompression time set also comprises two timers: first timer 21 and second timer 22.The output terminal of first voltage comparator 11 links to each other with the start end of first timer 21 and second timer 22 respectively, when first phase voltage during greater than reference voltage, signal of first voltage comparator, 11 outputs picks up counting first timer 21 and second timer 22.The output terminal of second voltage comparator 12 links to each other with the end that stops of first timer 21.When second phase voltage during greater than reference voltage, signal of second voltage comparator, 12 outputs makes first timer 21 stop timing.The output terminal of tertiary voltage comparer 13 links to each other with the end that stops of second timer 22.When third phase voltage during greater than reference voltage, signal of tertiary voltage comparer 13 outputs makes second timer 22 stop timing.First and second timers 21 link to each other with a phase difference calculating device 3 with 22 output terminal.Phase difference calculating device 3 calculates first, second and third phase voltage phase differential each other according to the count value of first and second timers 21 and 22 outputs.The output terminal of phase difference calculating device 3 links to each other with a timing drive device 4, and whether timing drive device 4 is at first differentiated three phase differential has a phase differential greater than 150 degree.If a phase differential is arranged greater than 150 degree, then explanation and another the relative phase voltage decompression of two phase voltages that forms this phase differential, this phase decompression timing drive signal of timing drive device 4 outputs is to decompression timing and display 5.Three decompression timers are arranged in decompression timing and the display 5, the decompression time of writing down first phase voltage, second phase voltage and third phase voltage respectively, and show respectively with display.For example, exporting third phase decompression timing drive signals when timing drive device 4 is that the third phase voltage timer in decompression timing and the display 5 picks up counting.
In the present embodiment, the decompression time set also comprises a three phase rectifier 6 and reference voltage generator 7.Three phase voltages of three-phase electricity input in the three phase rectifier 6.The effect of this three phase rectifier is, on the one hand, the electric current after three phase rectifier 6 rectifications can be used as the work electricity consumption of circuit such as voltage comparator in the decompression device, timer, counter behind filtering voltage regulation; On the other hand, three phase rectifier 6 has or not direct current output also to can be used as to declare the situation that whether has two-phase or three-phase pressure loss in the three-phase electricity.In three-phase electricity, two phase voltages or three phase voltages are arranged simultaneously during decompression, three phase rectifier 6 will not have direct current and will export.So, can link to each other an output terminal of three phase rectifier 6 with timing drive device 4.When three phase rectifier 6 no direct currents were exported, timing drive device 4 picked up counting the three-phase pressure loss timer in decompression timing and the display 5 to decompression timing and three-phase pressure loss timing drive signal of display 5 outputs.On the one hand, also can connect a reference voltage generator 7 on the output terminal of three phase rectifier 6 again.This reference voltage generator 7 utilizes the direct current of three phase rectifier 6 outputs to produce reference voltage, uses for three voltage comparators 11,12 and 13.Certainly, three phase rectifier 6 and reference voltage generator 7 are also nonessential in the present invention.Because, in some decompression timing is used, do not need to carry out the three-phase pressure loss timing, only need single-phase decompression timing to get final product.
Fig. 3 shows a kind of concrete circuit diagram of the block scheme of Fig. 2.Among Fig. 3, three phase rectifier 6 is made of with the diode D1-D6 that connects into rectified three-phase circuit resistance R 1 to R3.Reference voltage generator 7 is made up of the resistance R 4 of two series connection, R5 and two series capacitors C1 and C2, resistance R 4 and R5 series connection back with connect after capacitor C1 and C2 parallel connection, reference voltage is drawn from the resistance R 4 of series connection and R5 and series capacitors C1 and C2 tie point, is the mid point of three-phase electricity.Voltage comparator 11,12 and 13 usefulness operational amplifiers constitute.Decompression timing part in first timer 21, second timer 22, phase difference calculating device 3, timing drive device 4 and decompression timing and the display 5 among Fig. 2 is realized by a singlechip CPU.In singlechip CPU, realize above-mentioned functions of components among Fig. 2 with software, about concrete software, those skilled in the art can draw according to above-mentioned description, therefore, no longer describe at this.
In Fig. 2, three voltage comparators 11,12 and 13, first and second timers 21 and 22 and phase difference calculating device 3 formed a phase difference detector.Fig. 4 shows the formation of another kind of phase detectors.As shown in Figure 4, phase difference detector comprises three voltage comparators: first voltage comparator 11, second voltage comparator 12 and tertiary voltage comparer 13, these three comparers are identical with three voltage comparators among Fig. 2.Three phase voltages of three-phase voltage are imported an input end of three comparers 11,12 and 13 respectively.Three voltage comparators 11,12 and another input end grounding of 13.Phase voltage becomes square-wave signal behind voltage comparator.Three voltage comparators 11,12 and 13 output terminal are connected on three XOR gate G1, G2 and the G3 in twos.On the output terminal of XOR gate G1, G2 and G3, be connected a capacitor and resistor C11 and R11, C12 and R12 and C13 and R13 respectively over the ground, also be connected to the timing drive device.In the present embodiment, the timing drive device is made up of three voltage comparator D1, D2 and D3.The principle of work of the phase difference detector of present embodiment is, when the square-wave voltage of first voltage comparator 11 and 12 outputs of second voltage comparator was opposite, XOR gate G1 exported 1 (high level), charges to capacitor C11.If the phase differential between first phase voltage and second phase voltage is big more, then the time of XOR gate G1 output 1 long more, so the voltage on the capacitor C11 is just high more.An input end as the voltage comparator D1 of timing drive device is connected to capacitor C11, and another input termination one threshold voltage.This threshold voltage is the voltage that is filled on 150 capacitor C11 when spending or C12 or the C13 corresponding to the two-phase potential difference just in time.When the phase differential of first phase voltage and second phase voltage is spent above 150, the voltage on the capacitor C11 will be higher than threshold voltage like this, thereby voltage comparator D1 exports a drive signal, and the decompression timer that drives the back level carries out timing.
Invention has been described by embodiment above.But the present invention is not limited to the above embodiments.The foregoing description can also be made some variations under the situation that does not change design of the present invention.As, in further embodiments, phase difference detector can be realized with methods such as phase demodulations; Adding first, second timer that the mode of software realizes, phase difference calculating device, timing drive device etc. with single-chip microcomputer among Fig. 2 and Fig. 3 also can realize with the form of hardware.Therefore, protection scope of the present invention is limited by appending claims.
Claims (7)
1. a decompression clocking method is characterized in that, comprises the following steps:
The phase place of three phase voltages is compared mutually, obtain described three phase voltages phase differential each other;
When the phase differential of the wherein any two-phase in described three phase voltages is spent greater than 150, be judged as another phase decompression, carry out the decompression timing.
2. decompression clocking method as claimed in claim 1 is characterized in that, described phase place comparison step comprises:
Three phase voltages are made comparisons with a reference voltage respectively,
If first phase voltage in described three phase voltages is greater than or less than described reference voltage, then first timer and second timer pick up counting;
If second phase voltage in described three phase voltages is greater than or less than described reference voltage, then described first timer stops timing;
If the third phase voltage in described three phase voltages is greater than or less than described reference voltage, then described second timer stops timing;
Described second phase voltage that described first timer and second timer are write down and described third phase voltage respectively and the mistiming of described first phase voltage be converted into phase differential between described three phase voltages.
3. decompression clocking method as claimed in claim 1 is characterized in that,
Before carrying out described phase bit comparison, earlier described three-phase voltage is carried out three phase rectifier;
If the voltage behind the described three phase rectifier is zero, then carry out the three-phase pressure loss timing.
4. a decompression time set is characterized in that, comprising:
Phase difference detector is used to detect three phase voltages phase differential each other;
The timing drive device links to each other with described phase difference detector, in the phase differential between described three phase voltages of described phase difference detector output, when the phase differential of wherein any two phase voltages is spent greater than 150, exports the decompression timing drive signal of another phase;
Decompression timing and display link to each other with described timing drive device, and the decompression timing drive signal according to described timing drive device output carries out the timing of phase-splitting decompression.
5. decompression time set as claimed in claim 4 is characterized in that, described phase difference detector comprises:
Three voltage comparators that three phase voltages are compared with a reference voltage respectively;
First timer links to each other with first comparer in described three voltage comparators, triggered by its trigger pip and picks up counting, and links to each other with second comparer in described three voltage comparators, is subjected to its trigger pip to trigger the termination timing;
Second timer links to each other with first comparer in described three voltage comparators, triggered by its trigger pip and picks up counting, and links to each other with the 3rd comparer in described three voltage comparators, is subjected to its trigger pip to trigger the termination timing;
The phase difference calculating device links to each other with described second timer with described first timer, and it calculates the phase differential between described three phase voltages according to the count value of described first timer and the output of described second timer.
6. decompression time set as claimed in claim 5 is characterized in that, described decompression timer also comprises:
One three phase rectifier, described three-phase voltage is carried out three phase rectifier, the output terminal of described three phase rectifier links to each other with described timing drive device, when described timing drive device is output as zero at described three phase rectifier, drives described decompression timer and carries out two-phase or three-phase pressure loss timing.
7. decompression time set as claimed in claim 6 is characterized in that, described decompression timer also comprises:
A reference voltage generator links to each other with described three phase rectifier, produces a reference voltage, transports to described three voltage comparators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95121809 CN1153307A (en) | 1995-12-29 | 1995-12-29 | Under-voltage timing method and under-voltage timing device thereby |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 95121809 CN1153307A (en) | 1995-12-29 | 1995-12-29 | Under-voltage timing method and under-voltage timing device thereby |
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| CN1153307A true CN1153307A (en) | 1997-07-02 |
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| CN 95121809 Pending CN1153307A (en) | 1995-12-29 | 1995-12-29 | Under-voltage timing method and under-voltage timing device thereby |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102656472A (en) * | 2009-12-17 | 2012-09-05 | 皇家飞利浦电子股份有限公司 | Direct digital receiver with local free running clock |
| CN104828111A (en) * | 2015-05-29 | 2015-08-12 | 中国铁路通信信号上海工程局集团有限公司 | Connector device for switch machine for railway |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
| CN105353261A (en) * | 2015-10-26 | 2016-02-24 | 常熟开关制造有限公司(原常熟开关厂） | Open-phase fault detection method and device, and automatic change-over switch |
| CN107612107A (en) * | 2017-08-23 | 2018-01-19 | 成都芯源系统有限公司 | Power supply voltage generating circuit and integrated circuit thereof |
| CN109613386A (en) * | 2019-01-04 | 2019-04-12 | 常熟开关制造有限公司(原常熟开关厂） | The detection method and device of three phase mains inlet wire zero curve misconnection, automatic change-over |
| CN111521886B (en) * | 2020-04-28 | 2021-07-16 | 美的集团股份有限公司 | Phase-loss detection circuit and air conditioner |
-
1995
- 1995-12-29 CN CN 95121809 patent/CN1153307A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102656472A (en) * | 2009-12-17 | 2012-09-05 | 皇家飞利浦电子股份有限公司 | Direct digital receiver with local free running clock |
| CN102656472B (en) * | 2009-12-17 | 2015-11-25 | 皇家飞利浦电子股份有限公司 | There is the Direct Digital receiver of local free-running operation clock |
| CN104828111A (en) * | 2015-05-29 | 2015-08-12 | 中国铁路通信信号上海工程局集团有限公司 | Connector device for switch machine for railway |
| CN105203911A (en) * | 2015-10-26 | 2015-12-30 | 常熟开关制造有限公司(原常熟开关厂） | Open conductor fault detection method and device for three-phase power source and automatic transfer switch |
| CN105353261A (en) * | 2015-10-26 | 2016-02-24 | 常熟开关制造有限公司(原常熟开关厂） | Open-phase fault detection method and device, and automatic change-over switch |
| CN105203911B (en) * | 2015-10-26 | 2018-01-05 | 常熟开关制造有限公司(原常熟开关厂） | Three phase mains open phase fault detection method, device and a kind of automatic change-over |
| CN105353261B (en) * | 2015-10-26 | 2018-01-19 | 常熟开关制造有限公司(原常熟开关厂） | Open phase fault detection method, device and a kind of automatic change-over |
| CN107612107A (en) * | 2017-08-23 | 2018-01-19 | 成都芯源系统有限公司 | Power supply voltage generating circuit and integrated circuit thereof |
| CN109613386A (en) * | 2019-01-04 | 2019-04-12 | 常熟开关制造有限公司(原常熟开关厂） | The detection method and device of three phase mains inlet wire zero curve misconnection, automatic change-over |
| CN109613386B (en) * | 2019-01-04 | 2020-10-02 | 常熟开关制造有限公司(原常熟开关厂） | Method and device for detecting misconnection of zero lines of three-phase power supply incoming line and automatic change-over switch |
| CN111521886B (en) * | 2020-04-28 | 2021-07-16 | 美的集团股份有限公司 | Phase-loss detection circuit and air conditioner |
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