CN101447667A - High voltage transducer power unit input phase loss detector - Google Patents
High voltage transducer power unit input phase loss detector Download PDFInfo
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- CN101447667A CN101447667A CNA2008102052151A CN200810205215A CN101447667A CN 101447667 A CN101447667 A CN 101447667A CN A2008102052151 A CNA2008102052151 A CN A2008102052151A CN 200810205215 A CN200810205215 A CN 200810205215A CN 101447667 A CN101447667 A CN 101447667A
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Abstract
The invention provides a high voltage transducer power unit input phase loss detector. The invention is characterized in that the detector comprises a circuit which transforms high voltage input into single phase low voltage output. A phase A output end of the circuit which transforms the high voltage input into the single phase low voltage output is connected with a first voltage reducing loop and a second voltage reducing loop respectively; a phase B output end is connected with the second voltage reducing loop and a third voltage reducing loop respectively; and a phase C output end is connected with the first voltage reducing loop and the third voltage reducing loop respectively. The first voltage reducing loop, the second voltage reducing loop and the third voltage reducing loop are respectively connected with a first voltage-stabilizing rectification filter circuit, a second voltage-stabilizing rectification filter circuit and a third voltage-stabilizing rectification filter circuit. The first voltage-stabilizing rectification filter circuit, the second voltage-stabilizing rectification filter circuit and the third voltage-stabilizing rectification filter circuit are respectively connected with a first isolation converting circuit, a second isolation converting circuit and a third isolation converting circuit. The first isolation converting circuit, the second isolation converting circuit and the third isolation converting circuit are respectively connected with a phase A phase loss signal output circuit, a phase B phase loss signal output circuit and a phase C phase loss signal output circuit. The high voltage transducer power unit input phase loss detector has the advantages of high electric isolation degree, strong anti-interference capability, simple circuit realization, using less element and apparatus, reducing the cost of the circuit and improving the reliability of the circuit.
Description
Technical field
The present invention relates to a kind of high voltage transducer power unit input phase loss detector, belong to the switch power technology field.
Background technology
Owing to adopt at present in the electric topological structure of cell series multi-level converter, the all separate work of each power cell, after the phase shifting transformer power taking through three phase full bridge rectification, filtering, low tension loop power work, cell controller operate as normal and with the master controller communication, carry out normal copped wave frequency conversion, the alternating current that output voltage, frequency are all adjustable according to the instruction of master controller again.In course of normal operation, cell controller needs the active detecting unit various faults that may occur in service,, control circuit dead electricity not normal, unit excess temperature etc. as power supply input side phase shortage, overvoltage, overcurrent, power device overcurrent, optical-fibre communications, must accurately make timely and judging and corresponding the processing, and report master controller.Master controller does further to judge and handle according to the information of fault, and sends control command and return to cell controller, allows the unit make relevant protection action, and demonstrates the processing that fault-signal prompting user does dependent failure.
When high voltage converter normally moves, if the three-phase that power cell occurs input open-phase fault, at first, influence the big instability of unit output-power fluctuation; Secondly, cause rectifier bridge to be damaged easily; If fault is not found not to be excluded, and the operation of long-time continuous overcurrent, can burn out input phase shifting transformer winding, and may cause whole phase shifting transformer to be burnt out, and whole high voltage converter all may be damaged.Hence one can see that, for three-phase input phase shortage can be in time correct the importance of detection, but high pressure detects because lack detection circuit relates to again, high-low pressure altogether, the no center line of three-phase input, easily and reason such as under-voltage fault erroneous judgement, and become one of technological difficulties in the cell failure detection.
As shown in Figure 1, be traditional phase shortage detection method circuit diagram, isolate three-phase voltage by the power frequency isolating transformer, the former limit star of three transformers connects, the input voltage of former edge joint power cell, the inferior limit of each transformer connects current rectifying and wave filtering circuit, and current rectifying and wave filtering circuit connects voltage comparator circuit, and the voltage swing judgement after moving according to rectification, filter has or not phase shortage.The advantage of this method is an electrical isolation degree height, reliable; Shortcoming is to need heavy Industrial Frequency Transformer, circuit complexity etc.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, a kind of high voltage transducer power unit input phase loss detector is provided.
In order to achieve the above object, technical scheme of the present invention provides a kind of high voltage transducer power unit input phase loss detector, it is characterized in that, comprise that the high pressure input is converted to single-phase low-voltage output circuit, the A phase output terminal that the high pressure input is converted to single-phase low-voltage output circuit connects first reduction voltage loop and second reduction voltage loop respectively, the B phase output terminal connects second reduction voltage loop and the 3rd reduction voltage loop respectively, the C phase output terminal connects first reduction voltage loop and the 3rd reduction voltage loop respectively, first reduction voltage loop, second reduction voltage loop is connected the first voltage stabilizing current rectifying and wave filtering circuit respectively with the 3rd reduction voltage loop, the second voltage stabilizing current rectifying and wave filtering circuit and the 3rd voltage stabilizing current rectifying and wave filtering circuit, the first voltage stabilizing current rectifying and wave filtering circuit, the second voltage stabilizing current rectifying and wave filtering circuit is connected first respectively with the 3rd voltage stabilizing current rectifying and wave filtering circuit and isolates change-over circuit, second isolates change-over circuit and the 3rd isolates change-over circuit, and first isolates change-over circuit, the second isolation change-over circuit and the 3rd is isolated change-over circuit and is connected A phase default phase signal output circuit respectively, B phase default phase signal output circuit and C be the default phase signal output circuit mutually.
Advantage of the present invention is:
1, electrical isolation degree height, antijamming capability is strong;
2, circuit realizes that simply, components and parts use few, reduces the cost of circuit itself, improves the reliability of circuit.
Description of drawings
Fig. 1 is traditional phase shortage detection method circuit diagram;
Fig. 2 is a high voltage transducer power unit input phase loss detector circuit diagram of the present invention.
Embodiment
Further specify the present invention below in conjunction with embodiment.
Embodiment
As shown in Figure 2, be high voltage transducer power unit input phase loss detector circuit diagram of the present invention, described a kind of high voltage transducer power unit input phase loss detector, comprise that the high pressure input is converted to single-phase low-voltage output circuit, the A phase output terminal that the high pressure input is converted to single-phase low-voltage output circuit connects first reduction voltage loop and second reduction voltage loop respectively, the B phase output terminal connects second reduction voltage loop and the 3rd reduction voltage loop respectively, the C phase output terminal connects first reduction voltage loop and the 3rd reduction voltage loop respectively, first reduction voltage loop, second reduction voltage loop is connected the first voltage stabilizing current rectifying and wave filtering circuit respectively with the 3rd reduction voltage loop, the second voltage stabilizing current rectifying and wave filtering circuit and the 3rd voltage stabilizing current rectifying and wave filtering circuit, the first voltage stabilizing current rectifying and wave filtering circuit, the second voltage stabilizing current rectifying and wave filtering circuit is connected first respectively with the 3rd voltage stabilizing current rectifying and wave filtering circuit and isolates change-over circuit, second isolates change-over circuit and the 3rd isolates change-over circuit, and first isolates change-over circuit, the second isolation change-over circuit and the 3rd is isolated change-over circuit and is connected A phase default phase signal output circuit respectively, B phase default phase signal output circuit and C be the default phase signal output circuit mutually.
Wherein, described high pressure input is converted to each road of single-phase low-voltage output circuit and forms by four identical high-tension resistives of resistance, High AC voltage is imported in the middle of the high-tension resistive of four series connection, by the series connection dividing potential drop of two high-tension resistives, simultaneously ac voltage signal is given two-way voltage stabilizing, rectification, filter circuit respectively; The high pressure input is converted to single-phase low-voltage output circuit, is used for the three-phase high-voltage alternating voltage of input is converted to the alternating voltage output of three tunnel single-phase low pressure.
Each road of described voltage stabilizing current rectifying and wave filtering circuit absorbs electric capacity, a bi-directional voltage stabilizing diode, a rectifier bridge and a filter capacitor by one and forms, the ac voltage signal of low pressure is through absorbing electric capacity filtering high-frequency signal, by the voltage stabilizing of bi-directional voltage stabilizing diode, give rectifier bridge and carry out full-wave rectification, by filter capacitor ac voltage signal is converted to stably d. c. voltage signal at last and gives the isolation change-over circuit; The ac voltage signal that is used for importing single-phase low pressure of described voltage stabilizing current rectifying and wave filtering circuit carries out voltage stabilizing, rectification, filtering, and ac voltage signal is converted to d. c. voltage signal stably.
Each road of described isolation change-over circuit all is made up of a current-limiting resistance and an optocoupler, and d. c. voltage signal is given optocoupler through the current limliting of resistance with signal, and the isolation conversion by optocoupler finally sends default phase signal to cell controller and handles.Described isolation change-over circuit is used for giving cell controller default phase signal with d. c. voltage signal by the conversion of optocoupler, makes the high pressure input detect and can keep apart with low voltage control.
The course of work of this circuit is as follows:
Three-phase alternating voltage A, the B of power cell, C are converted to single-phase low-voltage output circuit by the high pressure input, intersect after the high-tension resistive step-down in twos, form three tunnel single-phase low-voltage ac voltage signal outputs, give three tunnel voltage stabilizings, rectification, filter circuit respectively ac voltage signal is converted to d. c. voltage signal, be transferred to the input of optocoupler, optocoupler according to the output level of the big or small control output end of signal, is given cell controller with the default phase signal of A, B, C three-phase again.When the power cell operate as normal, three-phase alternating voltage does not drop into 200V when following, behind step-down, voltage stabilizing, rectification, filter circuit, the d. c. voltage signal of delivering to the input of optocoupler is enough to make the complete conducting of optocoupler, make three tunnel default phase signal all give the cell controller detection to set level, cell controller is not reported the phase shortage incident; Reach a input ac voltage more than mutually mutually and drop into 200V when following when power cell occurs one, behind step-down, voltage stabilizing, rectification, filter circuit, the d. c. voltage signal of delivering to the input of optocoupler will cause the incomplete conducting of optocoupler, make to have at least in three tunnel default phase signal one the tunnel to be to give cell controller to be lower than the signal of setting level, cell controller again according to this default phase signal quote corresponding that be phase shortage mutually.
When the phase shortage accident occurs, the voltage of input all is very low, generally all in several volts, the voltage of high voltage transducer power unit phase loss detector of the present invention about with 200V is standard, judge as whether phase shortage really occurring, can avoid the input voltage of three-phase alternating voltage fluctuation to occur or occur the possibility of wrong report when disturbing.
Claims (1)
1. high voltage transducer power unit input phase loss detector, it is characterized in that, comprise that the high pressure input is converted to single-phase low-voltage output circuit, the A phase output terminal that the high pressure input is converted to single-phase low-voltage output circuit connects first reduction voltage loop and second reduction voltage loop respectively, the B phase output terminal connects second reduction voltage loop and the 3rd reduction voltage loop respectively, the C phase output terminal connects first reduction voltage loop and the 3rd reduction voltage loop respectively, first reduction voltage loop, second reduction voltage loop is connected the first voltage stabilizing current rectifying and wave filtering circuit respectively with the 3rd reduction voltage loop, the second voltage stabilizing current rectifying and wave filtering circuit and the 3rd voltage stabilizing current rectifying and wave filtering circuit, the first voltage stabilizing current rectifying and wave filtering circuit, the second voltage stabilizing current rectifying and wave filtering circuit is connected first respectively with the 3rd voltage stabilizing current rectifying and wave filtering circuit and isolates change-over circuit, second isolates change-over circuit and the 3rd isolates change-over circuit, and first isolates change-over circuit, the second isolation change-over circuit and the 3rd is isolated change-over circuit and is connected A phase default phase signal output circuit respectively, B phase default phase signal output circuit and C be the default phase signal output circuit mutually.
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| CNA2008102052151A CN101447667A (en) | 2008-12-30 | 2008-12-30 | High voltage transducer power unit input phase loss detector |
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| CNA2008102052151A CN101447667A (en) | 2008-12-30 | 2008-12-30 | High voltage transducer power unit input phase loss detector |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN102778612A (en) * | 2011-05-13 | 2012-11-14 | Ls产电株式会社 | Apparatus for detecting input phase missing and method thereof |
| TWI403747B (en) * | 2009-08-05 | 2013-08-01 | Univ Nat Cheng Kung | System and method for detecting phase failure of the brushless motor and a brushless motor control system with the phase failure detection |
| CN103283107A (en) * | 2010-12-28 | 2013-09-04 | 松下电器产业株式会社 | Power controller |
| CN104459353A (en) * | 2014-11-27 | 2015-03-25 | 国家电网公司 | PLC transmission instrument |
| CN107294403A (en) * | 2017-06-19 | 2017-10-24 | 上海电气富士电机电气技术有限公司 | A kind of three-phase input lack detection circuit |
| CN109406890A (en) * | 2018-11-23 | 2019-03-01 | 深圳市汇川技术股份有限公司 | Three-phase alternating current input phase failure detection method, system, equipment and storage medium |
| CN111381162A (en) * | 2018-12-27 | 2020-07-07 | 罗伯特·博世有限公司 | Determining an interrupted motor phase of an electric motor |
-
2008
- 2008-12-30 CN CNA2008102052151A patent/CN101447667A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI403747B (en) * | 2009-08-05 | 2013-08-01 | Univ Nat Cheng Kung | System and method for detecting phase failure of the brushless motor and a brushless motor control system with the phase failure detection |
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN102419400B (en) * | 2010-09-28 | 2014-04-09 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN103283107A (en) * | 2010-12-28 | 2013-09-04 | 松下电器产业株式会社 | Power controller |
| CN103283107B (en) * | 2010-12-28 | 2015-09-02 | 松下电器产业株式会社 | Power control unit |
| CN102778612A (en) * | 2011-05-13 | 2012-11-14 | Ls产电株式会社 | Apparatus for detecting input phase missing and method thereof |
| CN104459353A (en) * | 2014-11-27 | 2015-03-25 | 国家电网公司 | PLC transmission instrument |
| CN107294403A (en) * | 2017-06-19 | 2017-10-24 | 上海电气富士电机电气技术有限公司 | A kind of three-phase input lack detection circuit |
| CN109406890A (en) * | 2018-11-23 | 2019-03-01 | 深圳市汇川技术股份有限公司 | Three-phase alternating current input phase failure detection method, system, equipment and storage medium |
| CN109406890B (en) * | 2018-11-23 | 2021-07-27 | 深圳市汇川技术股份有限公司 | Three-phase AC input open-phase detection method, system, equipment and storage medium |
| CN111381162A (en) * | 2018-12-27 | 2020-07-07 | 罗伯特·博世有限公司 | Determining an interrupted motor phase of an electric motor |
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Open date: 20090603 |