CN2187798Y - Rectifier on-line trouble monitoring alarm device for multi-phase rectifier - Google Patents
Rectifier on-line trouble monitoring alarm device for multi-phase rectifier Download PDFInfo
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- CN2187798Y CN2187798Y CN 94206750 CN94206750U CN2187798Y CN 2187798 Y CN2187798 Y CN 2187798Y CN 94206750 CN94206750 CN 94206750 CN 94206750 U CN94206750 U CN 94206750U CN 2187798 Y CN2187798 Y CN 2187798Y
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- monitoring alarm
- signal
- rectifier cell
- phase
- rectifier
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Abstract
The utility model relates to a rectifier on-line trouble monitoring alarm device for a multi-phase (three phase, six phase, and twelve phase) rectifier, and aims at discovering the trouble of the open circuit and / or the short circuit of a single or more rectifying components in time to protect that a multi-phase generator and a transformer can not be damaged by the trouble. The monitoring alarm is mainly composed of the central processing part of a single-chip microcomputer, a signal sampling and isolation part, a trouble display part, an audible and visual alarm part, and a self test part which are connected. The short circuit eigenfunction f 1 (t) the open circuit eigenfunction f 2 (t) of the voltage of a rectifying component are used, and the single-chip microcomputer is used for identifying the nature of the trouble. The position of a trouble component can be designated accurately and audible and visual alarm signals can be sent out in time.
Description
The online malfunction monitoring alarm of rectifier cell of the utility model relates to heterogeneous (three-phase, six phases, ten two-phases) fairing.
Since the seventies, development along with large power semiconductor device, become development trend through rectification as high-power DC power supply with heterogeneous (three-phase, six phase or ten two-phases) alternating current, it is used more and more widely, and general three-phase (or six phases, ten two-phases) rectifier power source can be obtained by multiphase generator or transformer.The fault of rectifier cell directly influences the open circuit of the performance of fairing, particularly rectifier cell and the short circuit that short trouble can cause multiphase generator and local overload of transformer or danger in the fairing.Therefore for high-power multiphase rectifying device,, must detect the fault of rectifier cell and warning immediately in time for the harm of protecting multiphase generator and transformer not caused by the rectifier cell fault.
The purpose of this utility model is that a kind of multiphase rectifying device rectifier cell On-line Fault monitoring alarm will be provided; with the open circuit of finding one or more rectifier cells in time or (with) short trouble; protection multiphase generator and transformer are not damaged by fault, improve the on-road efficiency of multiphase generator and transformer.
The purpose of this utility model realizes with following method: the rectifier cell malfunction monitoring alarm of multiphase rectifying device is made up of central processing portion and the signal sampling that links with it and isolated part, display part, sound and light alarm part, self check part etc.
The online malfunction monitoring alarm of the rectifier cell of multiphase rectifying device, its number of phases can be three-phase, six phase or ten two-phases, and this monitoring alarm comprises central processing portion, signal sampling and isolated part, fault display part, sound and light alarm part and self check part; The central processing portion of this monitoring alarm is made up of the control rectifier cell fault-signal sampling single-chip microcomputer that line data handles of going forward side by side, this monitoring alarm has a resistor voltage divider circuit part that the combined-voltage signal is sampled, an isolated amplifier part of isolating unlike signal is arranged, this monitoring alarm shows that the part of rectifier cell fault is a light emitting diode matrix, and self check partly is shift register and charactron; Described central processing portion comprises single-chip microcomputer (8098), memory under program (EPROM2764), data memory (RAM6264), programmable parallel I/O mouth (8255A) and data latches (74LS373); Adopt rectification output negative terminal as ground to being total to anode tap element voltage signal, adopt the rectification output plus terminal as ground common cathode end rectifier cell voltage signal; The signal sampling part all is connected to analog switch (4051), and the isolated amplifier of different signals being isolated amplification is AD202KN; Light emitting diode matrix connects to shift register (74LS164), light emitting diode L194 and hummer; Self check partly comprises shift register (74LS164) and is attached thereto the charactron (LA5011) that connects.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is a central processing portion circuit diagram of the present utility model;
Fig. 3 is signal sampling of the present utility model and isolated part circuit diagram;
Fig. 4 is a display part of the present utility model circuit diagram.
The core of this monitoring alarm is a central processing portion, as shown in Figure 2.Mainly be formed by connecting by single-chip microcomputer (8098) and memory under program (EPROM2764), data memory (RAM6264), data latches (74LS373) and expansion parallel port (8255A) etc.Wherein software program is stored among the EPROM2764, and with the A/D data-storing of voltage signal on each rectifier cell in RAM6264, realize signals collecting by single-chip microcomputer 8098, and the signal of gathering carried out analyzing and processing.Because the I/O mouth that 8098 single-chip microcomputers provide is few, so adopt 8255A as the expansion I/O mouth.Programmable parallel mouth 8255A has 38 bit parallel mouths, and this monitoring alarm is selected wherein 4 analog switches that come the control signal sampling of PA, promptly controls A, B, C and the INH of analog switch 4051,3 analog switches that are used for controlling the A/D input in the PC mouth.
Signal sampling and isolated part are as shown in Figure 3.Consider in the general high-power rectifying device that current signal is difficult to sampling, so the signal of this monitoring alarm sampling is the ac voltage signal of multiphase rectifying device input end and the d. c. voltage signal of fairing output terminal.Adopt electric resistance partial pressure that the combined-voltage signal is sampled.Be sampled as example with a 12-phase rectification device, this device has 12 ac input ends and a pair of dc output end (U
D+, U
D-), these 14 end points (be numbered respectively A1, B1, C1 ... A4, B4, C4, U
D+, U
D-) as this monitoring alarm sampled signal input endpoint be connected to A1, B1 in the sample circuit (Fig. 3), C1 ... A4, B4, C4, U
D+, U
D-The point.Constitute the A1 last voltage U of negative electrode rectifier cell D2 mutually by resistance R 22 with R36
D2Sample circuit, R21 and R34 constitute B1 mutually negative electrode rectifier cell D4 go up voltage U
D4Sample circuit, all the other phase negative electrode rectifier cell voltage sampling circuits are made up of R20 and R11～R33 and R24 respectively; In like manner, constitute the A1 last voltage U of anode rectification element D1 mutually by R59 and R71
D1Sample circuit, all the other anode rectification element voltage sample circuits are made up of R58 and R48～R70 and R60.Form rectifier output voltage U in addition by R23 and R36
dSample circuit.25 tunnel sampled signals are delivered to U3, U4, four analog switches of U8, U9 (4051) respectively, are sampled by U1, U6 photoelectrical coupler (TLP521-4) control by single-chip microcomputer.As can be seen from Figure 3, sampling section has two ground, and one is the negative pole (U of fairing
D-), one is the positive pole (U of fairing
D+); equipotential not between two ground; so adopting U5 and U10 isolated amplifier (AD202KN) isolates sampled signal mutually; guarantee accurately to measure the voltage signal that is in high common mode voltage under like this, and the energy erasure signal caused measuring error of source Disturbance in Power Net and holding circuit are not damaged.Single-chip microcomputer 8098 is by the programmed instruction finished control analog switch (4051(1)～4051(4)) break-make, sample to each road signal sequence is touring with the frequency of determining, single-chip microcomputer in data memory (RAM6264), and in time carries out data processing with the data-storing gathered.
The software that single-chip microcomputer is carried out is according to each rectifier cell voltage signal fundamental function:
That is: ∫
T Of
1i(t) dt ≈ 0, the i element short circuit.
∫
T Of
2i(t) dt＞S, i element open circuit.
In the formula, T is the cycle of ten two-phase alternating current power supplys, and S is a selected constant, f
1(t) for the function of short circuit feature; f
2(t) be the function of open circuit feature.
The utility model fault display part is made up of light emitting diode matrix, and each rectifier cell state is represented with one red one yellow two light emitting diodes: two lamps all do not work, and this element is normal; Red light is bright, and this element is short-circuited; Amber light is bright, this element open circuit.The display part circuit is seen accompanying drawing 4, wherein with 8 bit strings go into/and go out shift register (74LS164) and expand delivery outlet, the break-make of 8 light emitting diodes of each 74LS164 control.A 12-phase rectification device has 24 rectifier cells, needs 48 diode displaying, is controlled by 6 74LS164.If the rectifier cell to 4 12-phase rectification devices carries out malfunction monitoring, then form array of display by 192 light emitting diodes, (L1～L192), the effective shift register 74LS164 of control light-emitting diodes needs 24 (74LS164(1)～(6), 74LS164(8 altogether)～(25) as shown in Figure 5).
The sound and light alarm part is mainly controlled Sheffer stroke gate (75452), light emitting diode L194 and hummer by single-chip microcomputer by shift register 74LS164 and is realized.When rectifier cell broke down, single-chip microcomputer sent instruction, and by the light emitting diode matrix of display part, clear and definite indication fault rectifier cell position and nature of trouble make the L194 LED flash simultaneously, and hummer sends " pout, pout ... " alarm sound.
This monitoring alarm self check part, reaching the shift register (74LS164) and the charactron (LA5011) that link with it by central processing portion single-chip microcomputer (8098) forms, can detect this monitoring alarm each several part certainly has non-fault, charactron indication fault part code name.Accompanying drawing 1～accompanying drawing 4 is embodiment of the present utility model, below in conjunction with accompanying drawing this monitoring alarm principle is described further.Accompanying drawing 1 is this monitoring alarm theory diagram, and accompanying drawing 2 is central processing portion connection layout.Mainly form by single-chip microcomputer (8098) and memory under program (EPROM2764), data memory (RAM6264), data latches (74LS373) and expansion parallel port (8255A) etc.Monitoring alarm working procedure and Fault Identification data processor all are stored among the EPROM2764, and voltage signal sample data on each rectifier cell is stored among the RAM6264, by single-chip microcomputer 8098 control signals samplings with carry out data processing.Programmable parallel mouth 8255A is as the expansion I/O mouth of single-chip microcomputer 8098, and wherein the break-make of analog switch (4051) U3, U4, U8, each road signal of U9 in 4 control charts 3 in the PA mouth realizes signal sampling control.
Central processing portion is carried out analyzing and processing according to sampled data, by the short circuit fundamental function f of each rectifier cell
1(t) and open circuit fundamental function f
2(t), this element state is discerned.
The display part as shown in Figure 4, by L1 to L192 totally 192 light emitting diodes constitute the array of display of 96 rectifier cell states of 4 12-phase rectification devices.L1(red light for example) bright, represent the 1st
#Rectifier cell D1 short trouble in the fairing, the L3(amber light) bright, represent this element open fault.Light emitting diode matrix is controlled by 24 shift registers by single-chip microcomputer.When rectifier cell broke down, single-chip microcomputer carried out data processing to sampled signal in time, sends instruction, and it is bright to control corresponding light emitting diode, clear and definite indication fault position of components and nature of trouble.And by shift register (74LS164(7)) send the sound and light alarm signal.
In addition, in the present embodiment,, just can carry out on-line monitoring, warning to the rectifier cell fault of three phase rectifier device, six commutating phase devices as long as suitably change the single-chip microcomputer working procedure.
Experimental results show that the utility model gets a desired effect, working stability is reliable, can indicate the fault element position exactly, sends the sound and light alarm signal in time.
Claims (7)
1, the online malfunction monitoring alarm of a kind of rectifier cell of multiphase rectifying device, it is characterized in that: described heterogeneous can be three-phase, six mutually or ten two-phases, this monitoring alarm comprises that single chip part, sample of signal and isolated part, fault display part, sound and light alarm are partly and the self check part; The central processing portion of this monitoring alarm is made up of the sampling of the control rectifier cell fault-signal single-chip microcomputer that line data handles of going forward side by side, and this monitoring alarm has a resistor voltage divider circuit part that the combined-voltage signal is sampled; This monitoring alarm has an isolated amplifier part of isolating unlike signal; This monitoring alarm shows that the part of rectifier cell fault is a light emitting diode matrix; Self check partly is shift register and charactron.
2, monitoring alarm according to claim 1 is characterized in that: described central processing portion comprises single-chip microcomputer (8098), memory under program (EPROM2764), data memory (RAM6264), programmable parallel mouth (8255A) and data latches (74LS373).
3, alarm according to claim 1 is characterized in that: adopt rectification output negative terminal to make ground to being total to anode tap rectifier cell voltage signal, common cathode end rectifier cell voltage signal employing rectification output plus terminal is done ground.
4, according to claim 1,2,3 described monitoring alarms, it is characterized in that: the signal sampling part all is connected to analog switch (4051), and the isolated amplifier of signal differently being isolated amplification is AD202KN.
5, monitoring alarm according to claim 1 is characterized in that: light emitting diode matrix connects to shift register (74LS164) and single-chip microcomputer (8098), and each rectifier cell connects to one red one yellow two light emitting diodes.
6, monitoring alarm according to claim 1 is characterized in that: fault alarm partly comprises shift register (74LS164), light emitting diode L194 and hummer.
7, monitoring alarm according to claim 1 is characterized in that: self check partly comprises shift register (74LS164) and is attached thereto the charactron (LA5011) that connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94206750 CN2187798Y (en) | 1994-05-31 | 1994-05-31 | Rectifier on-line trouble monitoring alarm device for multi-phase rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94206750 CN2187798Y (en) | 1994-05-31 | 1994-05-31 | Rectifier on-line trouble monitoring alarm device for multi-phase rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2187798Y true CN2187798Y (en) | 1995-01-18 |
Family
ID=33825274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94206750 Expired - Fee Related CN2187798Y (en) | 1994-05-31 | 1994-05-31 | Rectifier on-line trouble monitoring alarm device for multi-phase rectifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2187798Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136720A (en) * | 2011-04-26 | 2011-07-27 | 广东明阳龙源电力电子有限公司 | Method for detecting short circuit and open circuit faults of IGBT device and controller in online manner |
| CN102830273A (en) * | 2012-08-23 | 2012-12-19 | 徐州云泰汽车电器有限公司 | Early warning device for fault of rectifier |
| CN105676112A (en) * | 2016-03-02 | 2016-06-15 | 武汉新能源接入装备与技术研究院有限公司 | Universal fault detection method and apparatus for twelve-phase rectifier bridge |
-
1994
- 1994-05-31 CN CN 94206750 patent/CN2187798Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136720A (en) * | 2011-04-26 | 2011-07-27 | 广东明阳龙源电力电子有限公司 | Method for detecting short circuit and open circuit faults of IGBT device and controller in online manner |
| CN102830273A (en) * | 2012-08-23 | 2012-12-19 | 徐州云泰汽车电器有限公司 | Early warning device for fault of rectifier |
| CN105676112A (en) * | 2016-03-02 | 2016-06-15 | 武汉新能源接入装备与技术研究院有限公司 | Universal fault detection method and apparatus for twelve-phase rectifier bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |