CN102780372B - Exciter magnetizing device coaxial with synchronous generator - Google Patents
Exciter magnetizing device coaxial with synchronous generator Download PDFInfo
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- CN102780372B CN102780372B CN201210282464.7A CN201210282464A CN102780372B CN 102780372 B CN102780372 B CN 102780372B CN 201210282464 A CN201210282464 A CN 201210282464A CN 102780372 B CN102780372 B CN 102780372B
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 21
- 230000005284 excitation Effects 0.000 claims abstract description 73
- 230000005291 magnetic effect Effects 0.000 abstract description 21
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses an exciter magnetizing device coaxial with a synchronous generator. An exciter comprises an exciter excitation coil (LLQ), an exciter armature coil (L) and a field resistor (RC) which are connected in series to form a first magnetizing circuit. The device comprises a direct-current power supply (E), a magnetizing isolation diode (D1) and a follow current magnetizing diode (D2). The direct-current power supply (E), the magnetizing isolation diode (D1), the exciter excitation coil (LLQ) and the field resistor (RC) are connected in series to form a second magnetizing circuit. The exciter excitation coil (LLQ), the field resistor (RC) and the follow current magnetizing diode (D2) are connected in series to form a third magnetizing circuit. The exciter magnetizing device is simple to operate, safe and reliable, and suitable for re-magnetizing magnetic poles of a direct-current exciter coaxial with a large and medium- synchronous generator after loss of excitation, and the device can rectify and magnetize exciter output reversed polarity caused by various reasons.
Description
Technical field
The present invention relates to the one technology that magnetizes, particularly, relate to a kind of exciter magnetizer coaxial with synchronous generator.
Background technology
Do not have at present specially for the coaxial exciter of the synchronous generator technology that magnetizes, close with it, similar technology has pair small-sized DC generator technology that magnetizes under static state, this is for cannot effectively magnetize during at magnetic pole loss of excitation at 400KW to 500KW and above exciter (DC generator) with the coaxial power of synchronous generator at all, also have and utilize special magnet exciting coil to implement to relevant magnetic pole the technology that magnetization is magnetized, but its operation, structure is comparatively complicated, not being suitable for the exciter coaxial to synchronous generator (DC generator) carries out magnetic pole loss of excitation and magnetizes, above-mentioned its representative art has: the magnetizer of the electric rotating machine that application number is 200410062815.9 and electric rotating machine Magnitizing method, application number is a kind of magneto magnetization method of 201110108169.5 and the assembly etc. that magnetizes, their basic comprisings existing similar close, the main body of similar technique.But above technology all can not effective and safe ground magnetize or the anti-magnetic of exciter rectified a deviation and magnetized with the coaxial exciter magnetic pole of synchronous generator what cause because of a variety of causes.
Summary of the invention
The object of this invention is to provide a kind of exciter magnetizer coaxial with synchronous generator, magnetize or the anti-magnetic of exciter is rectified a deviation and magnetized with the coaxial exciter magnetic pole of synchronous generator what cause because of a variety of causes for solving effective and safe.
To achieve these goals, the invention provides a kind of exciter magnetizer coaxial with synchronous generator, wherein exciter comprises exciter excitation coil, armature of exciter coil and field resistance, this exciter excitation coil, armature of exciter coil and field resistance are in series, form first loop of magnetizing, it is characterized in that, this device comprises: DC power supply, magnetize isolating diode and the afterflow diode that magnetizes; DC power supply, the isolating diode that magnetizes, exciter excitation coil and field resistance are in series, and form second loop of magnetizing; Exciter excitation coil, field resistance and the afterflow diode that magnetizes is in series, and forms the 3rd loop of magnetizing.
By technique scheme, the present invention adopts the DC power supply of DC power supply as the loop of magnetizing, and can realize magnetizing to described exciter; The isolating diode that magnetizes will magnetize loop and the unidirectional isolation of DC power supply, prevent that DC power supply from becoming the load of exciter excitation coil; The magnetize access of diode of afterflow can realize the afterflow in the loop of magnetizing is magnetized.Can effectively control the time of magnetizing by the access of controlling DC power supply, and wiring is simple to operate, safe and reliable, be applicable to magnetizing again after the coaxial DC exciter magnetic pole loss of excitation of big-and-middle-sized synchronous generator, also can the exciter output reversed polarity causing because of a variety of causes rectified a deviation and be magnetized.
Other features and advantages of the present invention are described in detail the embodiment part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the coaxial exciter magnetizer of provided by the invention and synchronous generator.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the schematic diagram of the coaxial exciter magnetizer of provided by the invention and synchronous generator, and as shown in Figure 1, exciter comprises exciter excitation coil LLQ, armature of exciter coil L and field resistance R
c, this exciter excitation coil LLQ, armature of exciter coil L and field resistance R
cbe in series, form first loop of magnetizing, this device comprises: DC power supply E, magnetize isolating diode D1 and the afterflow diode D2 that magnetizes; DC power supply E, the isolating diode D1 that magnetizes, exciter excitation coil LLQ and field resistance R
cbe in series, form second loop of magnetizing; Exciter excitation coil LLQ, field resistance R
c, and the afterflow diode D2 that magnetizes be in series, form the 3rd loop of magnetizing.
Wherein, this device also comprises control switch K, and this control switch K is series at second and magnetizes in loop, for controlling the break-make in the loop of magnetizing.Can magnetize by the break-make realization forward at intermittence of controlling control switch K, that is, control the time of closed and disconnected, to realize the control of the time of the magnetizing length to exciter excitation coil LLQ, thereby realize the control to exciter output voltage.In the time that control switch K is closed, DC power supply E magnetizes to exciter excitation coil LLQ forward, in the time that control switch K disconnects, exciter excitation coil LLQ self-induction back-emf is carried out afterflow to exciter excitation coil LLQ and is magnetized by the afterflow diode D2 that magnetizes, and the sense of current that afterflow the is magnetized sense of current that magnetizes when closed with control switch K is identical.
This device also comprises the afterflow current-limiting resistance R that magnetizes, and this afterflow current-limiting resistance R that magnetizes is series at the 3rd and magnetizes in loop, for the protection of the afterflow diode D2 that magnetizes.
This device also comprises magnet exciting coil isolating diode D3, this magnet exciting coil isolating diode D3 is series at first and magnetizes in loop, the self-induction back-emf that exciter excitation coil LLQ produces is used for isolating exciter excitation coil LLQ and armature of exciter coil L, so that can not exert an influence to armature of exciter coil L.
Wherein DC power supply E can be a storage battery, the DC power supply that also can be composed in series for multiple storage batterys.
In Fig. 1, remove exciter excitation coil LLQ, field resistance R
cbe outward element, exciter excitation coil LLQ and field resistance R with outer all the other elements of armature of exciter coil L
cbe connected in series, afterflow magnetize diode D2 and afterflow magnetize current-limiting resistance R be connected in series after and exciter excitation coil LLQ and field resistance R
cparallel connection, afterflow is magnetized the anodic bonding of diode D2 to field resistance R
cone end, the magnetize negative electrode of diode D2 of afterflow is connected to one end of exciter excitation coil LLQ by the afterflow current-limiting resistance R that magnetizes, after DC power supply E, magnetize isolating diode D1 and control switch K series connection and exciter excitation coil LLQ and field resistance R
cin parallel, magnetize the anodic bonding of isolating diode D1 to the positive pole of DC power supply E, the negative electrode of isolating diode D1 of magnetizing is connected to exciter excitation coil LLQ, control switch K can be placed in DC power supply E and any position of the series circuit of the isolating diode D1 that magnetizes, the anodic bonding of magnet exciting coil isolating diode D3 is to armature of exciter coil L, the negative electrode of magnet exciting coil isolating diode D3 is connected to exciter excitation coil LLQ, exciter excitation coil LLQ, field resistance R in above annexation
cwith armature of exciter coil L be and exciter and the relevant coil of energized circuit and the resistance of generator coaxle.
DC power supply E can select automobile storage battery, and capacity should be greater than 30Ah, and terminal voltage should be greater than the magnitude of voltage of exciter excitation coil LLQ under normal 3000 revs/min, if can adopt not plurality of groups of storage batteries to be composed in series DC power supply.Generator speed is promoted to 3000 revs/min, by universal instrument measurement armature of exciter coil L both end voltage, in the time of exciter excitation coil LLQ pole core loss of excitation, armature of exciter coil L both end voltage should be zero volt left and right or little, intermittent Closed control K switch, with to exciter excitation coil LLQ by force forward magnetize.Control switch K is magnetized to exciter excitation coil LLQ by the isolating diode D1 forward that magnetizes by DC power supply E when closed, when control switch K disconnects by exciter excitation coil LLQ self-induction back-emf by afterflow magnetize diode D2 and afterflow magnetize current-limiting resistance R to exciter excitation coil LLQ afterflow magnetize, until armature of exciter coil L voltage meets the demands.Due to very large with the supporting general power capacity of coaxial exciter of synchronous generator, the process that magnetizes is longer, utilize control switch K to carry out forward while magnetizing, control switch K disconnects moment, the self-induction back-emf that exciter excitation coil LLQ produces is because the isolation of magnet exciting coil isolating diode D3 can not involve armature of exciter coil L, and its back-emf energy can be carried out secondary afterflow to exciter excitation coil LLQ and magnetized by the afterflow diode D2 loop of magnetizing.
In more detail, on the magnetic pole that exciter excitation coil LLQ is corresponding under normal circumstances, should there is the remanent magnetism that polarity is correct, with synchronous generator raising speed to 3000 revs/min of processes of rotating speed, remanent magnetism should be able to make armature of exciter coil L produce certain direct voltage and exciter excitation coil LLQ is formed to positive feedback exciting current to set up the VD of polarity correct (bearing just down as upper shown in Fig. 1), and this voltage value is looked field resistance R
cresistance is different and different.When due to excitation system misoperation, generator output loop suddenly-applied short circuit, the reasons such as exciter excitation loop loose contact have formed exciter excitation coil magnetic pole loss of excitation or anti-magnetic pole phenomenon, while start again after shutdown, with the armature of exciter coil L output voltage of generator coaxle be zero or output reversed polarity (being incorrect polarity) voltage, be exciter excitation coil remanence disappearance or the anti-magnetic of magnet exciting coil magnetic pole, now armature of exciter coil L both end voltage is lower, can not set up voltage or output voltage incorrect polarity (shown in Fig. 1, be upper negative under just), at this moment can pass through external direct current power supply E DC power supply, intermittently exciter excitation coil LLQ being carried out to forward magnetizes, in the time that control switch K is closed, DC power supply E carries out forward to exciter excitation coil LLQ and magnetizes, in the time that control switch K disconnects, exciter excitation coil LLQ self-induction back-emf is carried out afterflow to exciter excitation coil LLQ and is magnetized by afterflow diode D2 and the afterflow current-limiting resistance R that magnetizes that magnetizes, the afterflow sense of current and the control switch K sense of current that magnetizes when closed that magnetizes is identical.Simultaneously, to carry out under 3000 revs/min of nonstatic state owing to originally magnetizing, the induced potential of armature of exciter coil L also can magnetize to exciter excitation coil LLQ by magnet exciting coil isolating diode D3, magnetize through several times, through the long period process that magnetizes, exciter excitation coil LLQ can set up the remanent magnetism that size meets the demands with polarity, can be successfully to implementing to magnetize with the coaxial exciter of synchronous generator or the anti-magnetic correction of exciter magnetic pole forward magnetizes.
In Fig. 1, exciter excitation coil LLQ, field resistance R
cwith armature of exciter coil L be former exciter circuit coil and resistance, when test of magnetizing, field resistance R
cshould put appropriate location, field resistance R
calso can be used as magnetizes successfully recovers to regulate exciter voltage output also and then the element of regulator generator reactive power after normal wiring.In circuit, the isolating diode D1 effect of magnetizing is by the effective unidirectional isolation of loop and DC power supply E of magnetizing, prevent that DC power supply E from becoming the load of exciter excitation coil LLQ, the afterflow current-limiting resistance R that magnetizes plays metering function to the afterflow electric current that magnetizes being produced by exciter excitation coil LLQ, prevent the excessive damage afterflow of the freewheel current diode D2 that magnetizes, and exciter is had to inhibitory action because of the output voltage sudden change that freewheel current produces.
In loop, the magnetize maximal integer mass flow electric current of diode D2 and magnet exciting coil isolating diode D3 of isolating diode D1, afterflow that magnetizes should be greater than the electric current that exciter excitation coil LLQ passes through under normal circumstances, and peak-inverse voltage should be greater than exciter excitation coil LLQ both end voltage under normal circumstances
doubly, afterflow is magnetized current-limiting resistance R resistance by approximating the consideration of exciter excitation coil LLQ D.C. resistance, and its power consumption also presses exciter excitation coil LLQ normal voltage and electric current product calculates consideration.Correction to the armature of exciter voltage reversed polarity causing due to a variety of causes is magnetized, before magnetizing because exciter excitation coil LLQ pole polarity is with pole polarity is contrary under normal circumstances, its process of magnetizing need be passed through the long period, depending on varying in size from the exciter capacity of generator coaxle and anti-magnetic magnetic field and different, generally should be about 1 hour.While magnetizing, monitor that it is zero or when normal critical point that armature of exciter coil L both end voltage polarity becomes Voltage-output from reversed polarity, need continue repeatedly the forward pole polarity of former exciter excitation coil LLQ of just can rectifying a deviation that magnetizes, its main cause is because ferromagnetic material demagnetization is magnetized due to characteristic, in the time that forward magnetic field increases to a certain value, although the magnetic flux density of magnet is zero, magnet externally aobvious magnetic (corresponding armature of exciter coil L Voltage-output be zero or polarity of voltage be critical point), but at this moment the vector of the microcosmic magnetic dipole moment of magnet inside is not equal to zero, the magnetic polarization that is magnet still has a larger value on original direction, if at this moment stopping forward magnetizing, the polarity of voltage of armature of exciter coil L still can be got back to the state before correction, corresponding to correcting the reversed polarity of the former armature of exciter coil L process that magnetizes, additional DC power supply E magnetizes and should make the magnetic field intensity of exciter excitation coil LLQ not only will reach magnetic induction corresponding to this ferromagnetic material magnetic strength coercive force exciter excitation coil LLQ, more should reach magnetic induction corresponding to its HCJ, at this moment the voltage that stops armature of exciter coil L after magnetizing can remain normal polarity, magnetize and can complete.On-the-spot actual magnetizing while operation, the line of being drawn by the isolating diode D1 negative pole that magnetizes can be fixed to an insulating bar one end, the upper end in contact of the line that the hand-held insulating bar other end of operating personnel is intermittently drawn described negative pole and exciter excitation coil LLQ, magnetizes to replace control switch K to carry out forward.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
The technical thought that magnetizes provided by the invention is clear, circuit connection is simple, can under 3000 revs/min, utilize additional DC power supply E to magnetize to exciter excitation coil forward that electric current is magnetized in the afterflow of electric current, exciter excitation coil LLQ self-induced e.m.f and the electric current that magnetizes that formed by armature of exciter voltage is implemented the coaxial exciter of synchronous generator and magnetized.Wiring is simple to operate, safe and reliable, is applicable to the coaxial DC exciter of big-and-middle-sized synchronous generator to implement magnetizing again after loss of excitation, also can the exciter output reversed polarity causing because of a variety of causes be rectified a deviation and be magnetized.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (4)
1. an exciter magnetizer coaxial with synchronous generator, wherein said exciter comprises exciter excitation coil (LLQ), armature of exciter coil (L) and field resistance (R
c), this exciter excitation coil (LLQ), armature of exciter coil (L) and field resistance (R
c) be in series, form first loop of magnetizing, it is characterized in that, this device comprises: DC power supply (E), the isolating diode that magnetizes (D1), for controlling second control switch (K) of break-make in loop and the afterflow diode (D2) that magnetizes that magnetizes;
Described DC power supply (E), the isolating diode that magnetizes (D1), control switch (K), exciter excitation coil (LLQ) and field resistance (R
c) be in series, form described second loop of magnetizing; And
Described exciter excitation coil (LLQ), field resistance (R
c) and the afterflow diode (D2) that magnetizes be in series, form the 3rd loop of magnetizing.
2. device according to claim 1; it is characterized in that; this device also comprises the afterflow current-limiting resistance (R) that magnetizes, and this afterflow current-limiting resistance (R) that magnetizes is series at the described the 3rd and magnetizes in loop, for the protection of described fly-wheel diode (D2).
3. device according to claim 1, it is characterized in that, this device also comprises magnet exciting coil isolating diode (D3), this magnet exciting coil isolating diode (D3) is series at described first and magnetizes in loop, the self-induction back-emf that exciter excitation coil (LLQ) produces is used for isolating exciter excitation coil (LLQ) and armature of exciter coil (L), so that can not exert an influence to armature of exciter coil (L).
4. device according to claim 1, is characterized in that, described DC power supply (E) comprises the storage battery of one or more series connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282464.7A CN102780372B (en) | 2012-08-09 | 2012-08-09 | Exciter magnetizing device coaxial with synchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282464.7A CN102780372B (en) | 2012-08-09 | 2012-08-09 | Exciter magnetizing device coaxial with synchronous generator |
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| Publication Number | Publication Date |
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| CN102780372A CN102780372A (en) | 2012-11-14 |
| CN102780372B true CN102780372B (en) | 2014-08-06 |
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| DE2350738A1 (en) * | 1973-10-10 | 1975-04-24 | Braun Ag | MOVEMENT CAMERA WITH ELECTROMAGNETICALLY ACTUATED TRIP DEVICE |
| GB2270215B (en) * | 1992-08-28 | 1996-06-26 | Yang Tai Her | Control circuit for an electrical DC machine |
| JP2003116253A (en) * | 2001-07-19 | 2003-04-18 | Toshiba Corp | Turbine generator equipment and its installation method |
| CN101257242B (en) * | 2007-12-28 | 2010-09-29 | 永济新时速电机电器有限责任公司 | Novel direct current exciting device |
| CN202713098U (en) * | 2012-08-09 | 2013-01-30 | 中国神华能源股份有限公司 | Exciter magnetizing device coaxial with synchronous generator |
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