CN105486893B - Apparatus for generating oscillating wave - Google Patents
Apparatus for generating oscillating wave Download PDFInfo
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- CN105486893B CN105486893B CN201410484394.2A CN201410484394A CN105486893B CN 105486893 B CN105486893 B CN 105486893B CN 201410484394 A CN201410484394 A CN 201410484394A CN 105486893 B CN105486893 B CN 105486893B
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- 230000010355 oscillation Effects 0.000 abstract description 24
- 230000009471 action Effects 0.000 abstract description 7
- 230000003534 oscillatory effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Abstract
The invention discloses a kind of apparatus for generating oscillating wave.The apparatus for generating oscillating wave includes: power circuit, for providing alternating current；The first end of switching circuit, switching circuit is connect with power circuit；Resonant tank；And isolating transformer, the first end of isolating transformer and the second end of switching circuit connect, the second end of isolating transformer is connect with resonant tank.Through the invention, it solves the problems, such as to generate oscillation wave action oscillation wave waveform using regular tap, makes apparatus for generating oscillating wave that there is anti-interference ability, ensure that the accuracy of oscillation wave waveform.
Description
Technical field
The present invention relates to field of power systems, in particular to a kind of apparatus for generating oscillating wave.
Background technique
Currently, cable in practical application can or raw material immature due to manufacturing process it is impure and there are air gap and have
Evil property impurity, while being also possible to generate various defects and lead to shelf depreciation in the laying of cable and operational process.
Shelf depreciation is the running biggish security risk of power cable.Under the long term of shelf depreciation, insulating materials
Continuous aging eventually leads to insulation breakdown, causes major accident.It is found in insulation system in time by the detection to shelf depreciation
Weak link, find out failure cause, guarantee power cable quality, ensure power system security reliability service, have very heavy
The realistic meaning wanted.But Partial Discharge Detection be used for in-site measurement when, external noise serious interference is brought very to measurement
It is mostly difficult.Prior art application damp oscillatory wave carries out the detection and positioning of shelf depreciation to cable.In order to guarantee to cable into
The accuracy of row Partial Discharge Detection, must be requested that the waveform of damp oscillatory wave is accurate, then the device for generating damp oscillatory wave is answered
This has effective anti-interference ability.The device of traditional generation damp oscillatory wave generallys use common switch.Pass through adjusting
When the frequency of driving voltage and the identical resonance frequency of resonant tank, make resonant tank that resonance occur.When capacitor in resonant tank
Voltage when reaching preset voltage value, closure switch then produce damp oscillatory wave at resonant tank capacitor.But it utilizes
Traditional switch realizes that the generation of damp oscillatory wave can have certain time delay, and traditional switch executes slow in one's movements, Er Qiekai
Impurity existing for the Central Shanxi Plain can interfere the waveform of damp oscillatory wave, eventually lead to and realized using damp oscillatory wave to cable local discharge
Detection there are errors, have serious consequences.
Aiming at the problem that utilizing regular tap to generate oscillation wave action oscillation wave waveform in the related technology, not yet propose at present
Effective solution scheme.
Summary of the invention
The main purpose of the present invention is to provide a kind of apparatus for generating oscillating wave, to solve to generate oscillation using regular tap
The problem of wave action oscillation wave waveform.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of apparatus for generating oscillating wave.The oscillation
Wave generation device includes: power circuit, for providing alternating current；Switching circuit, the first end and power circuit of switching circuit connect
It connects；Resonant tank；And isolating transformer, the first end of isolating transformer and the second end of switching circuit connect, and transformation is isolated
The second end of device is connect with resonant tank.
Further, apparatus for generating oscillating wave further include: rectification circuit is connect with power circuit, is used for alternating current
It is rectified into direct current；Filter capacitor, it is in parallel with rectification circuit；And inverter circuit, the first end and filter capacitor of inverter circuit
Parallel connection, for being square-wave signal by DC conversion.
Further, inverter circuit includes: the first transistor group, wherein and the first transistor group includes the first transistor, the
Two-transistor, third transistor and the 4th transistor, the first transistor are connected in parallel on third crystal after connecting with second transistor
The concatenated both ends of tetra- transistor of Guan Yu；And first diode group, first diode group include first diode, the two or two pole
Pipe, third diode and the 4th diode, first diode is in parallel with the first transistor, the second diode and second transistor
Parallel connection, third diode is in parallel with third transistor, the 4th diode and the 4th coupled in parallel.
Further, the apparatus for generating oscillating wave further include: the first driving unit, the first pin of the first driving unit with
The first transistor connection, the second pin of the first driving unit are connect with second transistor；And second driving unit, second drives
First pin of moving cell is connect with third transistor, and the second pin of the second driving unit is connect with the 4th transistor.
Further, apparatus for generating oscillating wave further include: single-chip microcontroller, the first pin and the first driving unit of single-chip microcontroller
The connection of third pin, the second pin of single-chip microcontroller connect with the third pin of the second driving unit.
Further, switching circuit includes: first switch circuit, and the first end and filter capacitor of first switch circuit connect
It connects, the second end of first switch circuit and the first end of inverter circuit connect；And second switch circuit, second switch circuit
First end and the second end of inverter circuit connect, and the second end of second switch circuit and the first end of isolating transformer connect.
Further, first switch circuit includes: third driving unit, the first pin and single-chip microcontroller of third driving unit
Third pin connection；5th transistor is connect with the second pin of third driving unit；And the 5th diode, with the 5th
Coupled in parallel.
Further, second switch circuit includes: second transistor group, in parallel with the first end of isolating transformer, wherein
Second transistor group includes the 6th transistor and the 7th transistor, and the 6th transistor is connected with the 7th transistor；Second diode
Group, the second diode group include the 6th diode and the 7th diode, wherein the 6th diode and the 6th coupled in parallel, the
Seven diodes and the 7th coupled in parallel；And the 4th driving unit, the of the first pin of the 4th driving unit and single-chip microcontroller
The connection of four pins, the second pin of the 4th driving unit connect with the 6th transistor, the third pin of the 4th driving unit and the
The connection of seven transistors.
Further, resonant tank includes inductance and capacitor, and the of isolating transformer is connected in parallel on after inductance and capacitor series connection
Two ends.
Further, rectification circuit includes at least one rectifier diode.
Apparatus for generating oscillating wave includes: power circuit through the invention, for providing alternating current；Switching circuit, switch electricity
The first end on road is connect with power circuit；Resonant tank；And isolating transformer, the first end and switching circuit of isolating transformer
Second end connection, the second end of isolating transformer connect with resonant tank, solves and utilizes regular tap to give birth in the related technology
The problem of at oscillation wave action oscillation wave waveform, and then achieved the effect that the accuracy for guaranteeing oscillation wave waveform.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the first embodiment of apparatus for generating oscillating wave according to the present invention；
Fig. 2 is the schematic diagram of the second embodiment of apparatus for generating oscillating wave according to the present invention；
Fig. 3 is the schematic diagram of the 3rd embodiment of apparatus for generating oscillating wave according to the present invention；And
Fig. 4 is the structural schematic diagram of switching circuit in apparatus for generating oscillating wave according to the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, in ordinary skill
Personnel do not make every other embodiment obtained under the premise of creative work, and protection model of the invention all should belong to
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be in addition to illustrating herein or retouching
Sequence other than those of stating is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that covering
Non-exclusive includes.
The present invention is intended to provide a kind of apparatus for generating oscillating wave.Fig. 1 is the of apparatus for generating oscillating wave according to the present invention
The schematic diagram of one embodiment, as shown in Figure 1, apparatus for generating oscillating wave includes: power circuit 10, switching circuit 20, resonant tank
30 and isolating transformer 40.
Power circuit 10, for providing alternating current.
Power circuit 10 provides alternating current for the apparatus for generating oscillating wave, and wherein the alternating current can be 220V either
380V。
The first end of switching circuit 20, switching circuit 20 is connect with power circuit.
The normal work of the control of switching circuit 20 apparatus for generating oscillating wave.The first end and power circuit of switching circuit 20
Connection, the second end of switching circuit 20 are connect with the first end of isolating transformer 40.When switching circuit 20 is closed, the oscillation wave
Generation device works normally, and when switching circuit 20 disconnects, which cannot obtain the offer of power circuit 10
Alternating current can not work normally.
Resonant tank 30, the resonant tank include inductance and capacitor, are connected in parallel on isolating transformer after inductance and capacitor series connection
40 second end.
The first end of isolating transformer 40, isolating transformer 40 is connect with the second end of switching circuit 20, isolating transformer
40 second end is connect with resonant tank 30, and isolating transformer 40 is mainly used for adjusting ac-excited voltage, adjusts driving voltage
Frequency, the resonance frequency of the frequency and resonant tank 30 that make the driving voltage is just as generating to make 30 resonance of resonant tank
Resonance potential.When the resonance potential reaches preset voltage value, switching circuit 20 is closed, when the short circuit of switching circuit 20, humorous
Damp oscillatory wave is produced at the capacitor in vibration circuit 30.
The apparatus for generating oscillating wave of first embodiment of the invention includes power circuit 10, switching circuit 20, resonant tank 30
With isolating transformer 40.When switching circuit 20 is opened a way, inductance and tested cable are given through isolating transformer 40 by power circuit 10
Equivalent capacity constitute series loop provide the lower ac-excited voltage of a voltage.When the exchange that power circuit 10 provides
When the output frequency of electricity is identical as the resonance frequency of inductance and capacitor, resonance occurs for inductance and capacitor loop, generates the high electricity of resonance
Pressure.By the alternating voltage of adjusting power circuit, the resonance potential in tested cable equivalent capacity is made to reach preset voltage value, it will
20 short circuit of switching circuit, since there are internal resistances for inductance, so, damp oscillatory wave is produced on capacitor.Through the invention first
Embodiment is solved the problems, such as to be generated oscillation wave action oscillation wave waveform using regular tap, has apparatus for generating oscillating wave and resist
Interference performance ensure that the accuracy of oscillation wave waveform.
Fig. 2 is the schematic diagram of the second embodiment of apparatus for generating oscillating wave according to the present invention, as shown in Fig. 2, oscillation wave
Generation device includes: power circuit 10, switching circuit 20, resonant tank 30, isolating transformer 40, rectification circuit 50, filtered electrical
Hold 60 and inverter circuit 70.Wherein, inverter circuit 70 includes: the first transistor group 701 and first diode group 702.
Rectification circuit 50, connect with power circuit, is used for AC rectification into direct current.The rectification circuit 50 at least wraps
Include a rectifier diode.Three-phase bridge rectification circuit is formed using six rectifier diodes in the embodiment of the present invention.
Filter capacitor 60, it is in parallel with rectification circuit.The DC voltage exported by rectification circuit 50 is through excess capacity filtered electrical
Hold 60 and enters inverter circuit 70.
The first end of inverter circuit 70, inverter circuit is in parallel with filter capacitor, for being square-wave signal by DC conversion.
Inverter circuit 70 in the embodiment of the present invention is by four insulated gate bipolar transistor IGBTs difference freewheeling diodes in parallel
Composition.The embodiment of the present invention completes high-pressure electronic switch control using IGBT switch, is the input impedance because IGBT power is big
The advantages that small, driving power is small, and switching loss is small, and working frequency is high, and element volume is big, and control circuit is simple, is very suitable to hand over
The fields such as galvanic electricity machine, frequency converter, Switching Power Supply.
Specifically, inverter circuit 70 includes: the first transistor group 701, wherein the first transistor group includes first crystal
Pipe, second transistor, third transistor and the 4th transistor, the first transistor are connected in parallel on third after connecting with second transistor
Transistor and the 4th concatenated both ends of transistor；And first diode group 702, first diode group include first diode,
Second diode, third diode and the 4th diode, first diode is in parallel with the first transistor, the second diode and
Two-transistor is in parallel, and third diode is in parallel with third transistor, the 4th diode and the 4th coupled in parallel.It wherein, is every
A IGBT freewheeling diode in parallel, in order to when electric current in circuit suddenly disappears, be generated in IGBT coil
Induced electromotive force is consumed with freewheeling diode, to protect the safety of IGBT and other elements in circuit.
The apparatus for generating oscillating wave of the embodiment of the present invention includes: power circuit 10, switching circuit 20, resonant tank 30, every
From transformer 40, rectification circuit 50, filter capacitor 60 and inverter circuit 70.It can solve utilization using the apparatus for generating oscillating wave
Regular tap generates the problem of oscillation wave action oscillation wave waveform, and the oscillation wave waveform for generating apparatus for generating oscillating wave is accurate.
Fig. 3 is the schematic diagram of the 3rd embodiment of apparatus for generating oscillating wave according to the present invention, as shown in figure 3, oscillation wave
Generation device includes: power circuit 10, switching circuit 20, resonant tank 30, isolating transformer 40, rectification circuit 50, filtered electrical
Appearance 60, inverter circuit 70, the first driving unit 80, the second driving unit 90 and single-chip microcontroller 110.
First pin of the first driving unit 80, the first driving unit 80 is connect with the first transistor, the first driving single 80
The second pin of member is connect with second transistor；Second driving unit 90, the first pin and third of the second driving unit 90 are brilliant
The connection of body pipe, the second pin of the second driving unit 90 are connect with the 4th transistor；Single-chip microcontroller 110, the first of single-chip microcontroller 110 are drawn
Foot is connect with the third pin of the first driving unit 80, and the second pin of single-chip microcontroller 110 and the third of the second driving unit 90 are drawn
Foot connection.Single-chip microcontroller 110 is used to control the driving unit of IGBT.
The apparatus for generating oscillating wave of the embodiment of the present invention includes: power circuit 10, switching circuit 20, resonant tank 30, every
From transformer 40, rectification circuit 50, filter capacitor 60, inverter circuit 70, the first driving unit 80, the second driving unit 90 and list
Piece machine 110.It solves the problems, such as to generate oscillation wave action oscillation wave waveform using regular tap using the apparatus for generating oscillating wave.
Fig. 4 is the structural schematic diagram of switching circuit in apparatus for generating oscillating wave according to the present invention.As shown in figure 4, the vibration
The structure for swinging switching circuit 20 in wave generation device includes: first switch circuit 210 and second switch circuit 220.Wherein, first
Switching circuit 210 includes: third driving unit 2101, the 5th transistor 2102 and the 5th diode 2103.Second switch circuit
220 include: second transistor group 2201, the second diode group 2202 and the 4th driving unit 2203.
The first end of first switch circuit 210, first switch circuit is connect with filter capacitor, and the second of first switch circuit
End is connect with the first end of inverter circuit.The first switch circuit is mainly used for controlling power circuit 10 and powers to whole device.
When first switch circuit 210 is opened a way, which will be unable to work normally；When first switch circuit 210 is closed
When, power circuit 10 is apparatus for generating oscillating wave charging, guarantees the normal work of the device.
Specifically, first switch circuit 210 includes: third driving unit 2101, the first pin of third driving unit with
The third pin of single-chip microcontroller connects；5th transistor 2102 is connect with the second pin of third driving unit；And the five or two pole
Pipe 2103, with the 5th coupled in parallel.Wherein, the preferably IGBT of the 5th transistor 2102 in the embodiment of the present invention, the five or two
Pole pipe 2103 is preferably freewheeling diode.
Second switch circuit 220, the first end of second switch circuit and the second end of inverter circuit connect, second switch electricity
The second end on road and the first end of isolating transformer connect.When the frequency of driving voltage makes resonant tank 30 reach resonant state
When, improving driving voltage makes resonance potential reach preset voltage value, at this point, second switch circuit 220 is by quick-make, variable-frequency electric
The output in source also will be short-circuit rapidly, and voltage and current oscillation wave will be generated in resonant tank 30.
Specifically, second switch circuit 220 includes: second transistor group 2201, in parallel with the first end of isolating transformer,
Wherein, second transistor group includes the 6th transistor and the 7th transistor, and the 6th transistor is connected with the 7th transistor；Two or two
Pole pipe group 2202, the second diode group include the 6th diode and the 7th diode, wherein the 6th diode and the 6th transistor
Parallel connection, the 7th diode and the 7th coupled in parallel；4th driving unit 2203, the first pin and monolithic of the 4th driving unit
4th pin of machine connects, and the second pin of the 4th driving unit is connect with the 6th transistor, and the third of the 4th driving unit is drawn
Foot is connect with the 7th transistor.Wherein, the 5th transistor 2102 in the embodiment of the present invention is preferably IGBT, the 5th diode
2103 be preferably freewheeling diode.
Switching circuit 20 in the embodiment of the present invention include: include: first switch circuit 210 and second switch circuit 220.
Wherein, first switch circuit 210 includes: third driving unit 2101 and the 5th transistor 2102.Second switch circuit 220 wraps
It includes: second transistor group 2201, the second diode group 2202 and the 4th driving unit 2203.The apparatus for generating oscillating wave uses should
Switching circuit 20 can make entire apparatus for generating oscillating wave have apparent rigid interference performance, to ensure that oscillation wave waveform
Accuracy.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of apparatus for generating oscillating wave characterized by comprising
Power circuit, for providing alternating current；
Switching circuit, the first end of the switching circuit are connect with the power circuit；
Resonant tank；And
Isolating transformer, the first end of the isolating transformer are connect with the second end of the switching circuit, the isolation transformation
The second end of device is connect with the resonant tank；
The switching circuit includes: first switch circuit, and the first end of the first switch circuit is connect with filter capacitor, described
The second end of first switch circuit and the first end of inverter circuit connect；And second switch circuit, the second switch circuit
First end connect with the second end of the inverter circuit, the second end of the second switch circuit and the isolating transformer
First end connection；
The first switch circuit includes: third driving unit, and the of the first pin of the third driving unit and single-chip microcontroller
The connection of three pins；5th transistor is connect with the second pin of the third driving unit；And the 5th diode, and it is described
5th coupled in parallel；
The second switch circuit includes: second transistor group, in parallel with the first end of the isolating transformer, wherein described
Second transistor group includes the 6th transistor and the 7th transistor, and the 6th transistor is connected with the 7th transistor；The
Two diode groups, the second diode group include the 6th diode and the 7th diode, wherein the 6th diode and institute
State the 6th coupled in parallel, the 7th diode and the 7th coupled in parallel；And the 4th driving unit, the described 4th
First pin of driving unit is connect with the 4th pin of the single-chip microcontroller, the second pin of the 4th driving unit with it is described
The connection of 6th transistor, the third pin of the 4th driving unit are connect with the 7th transistor；
Wherein, the resonant tank includes inductance and capacitor, is connected in parallel on the isolation after the inductance and capacitor series connection and becomes
The second end of depressor.
2. apparatus for generating oscillating wave according to claim 1, which is characterized in that the apparatus for generating oscillating wave further include:
Rectification circuit is connect with the power circuit, is used for the AC rectification into direct current；
Filter capacitor, it is in parallel with the rectification circuit；And
Inverter circuit, the first end of the inverter circuit is in parallel with the filter capacitor, for being side by the DC conversion
Wave signal.
3. apparatus for generating oscillating wave according to claim 2, which is characterized in that the inverter circuit includes:
The first transistor group, wherein the first transistor group includes the first transistor, second transistor, third transistor with
And the 4th transistor, the first transistor are connected in parallel on the third transistor and described the after connecting with the second transistor
The concatenated both ends of four transistors；And
First diode group, the first diode group include first diode, the second diode, third diode and the 4th
Diode, the first diode is in parallel with the first transistor, and second diode is in parallel with the second transistor,
The third diode is in parallel with the third transistor, the 4th diode and the 4th coupled in parallel.
4. apparatus for generating oscillating wave according to claim 3, which is characterized in that the apparatus for generating oscillating wave further include:
First pin of the first driving unit, first driving unit is connect with the first transistor, first driving
The second pin of unit is connect with the second transistor；And
First pin of the second driving unit, second driving unit is connect with the third transistor, second driving
The second pin of unit is connect with the 4th transistor.
5. apparatus for generating oscillating wave according to claim 4, which is characterized in that the apparatus for generating oscillating wave further include:
Single-chip microcontroller, the first pin of the single-chip microcontroller are connect with the third pin of first driving unit, the single-chip microcontroller
Second pin is connect with the third pin of second driving unit.
6. apparatus for generating oscillating wave according to claim 1, which is characterized in that rectification circuit includes at least one rectification two
Pole pipe.
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| CN201410484394.2A CN105486893B (en) | 2014-09-19 | 2014-09-19 | Apparatus for generating oscillating wave |
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| CN201410484394.2A CN105486893B (en) | 2014-09-19 | 2014-09-19 | Apparatus for generating oscillating wave |
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| CN105486893B true CN105486893B (en) | 2019-06-21 |
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| HUE051101T2 (en) | 2018-03-22 | 2021-03-01 | Grieshaber Vega Kg | Impedance limit switch for reducing emi emissions and method for determining a limit level of a medium through an impedance limit switch |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349734A (en) * | 2008-09-02 | 2009-01-21 | 薛建仁 | Apparatus for generating oscillating wave for electrical apparatus test |
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| CN2672660Y (en) * | 2003-12-05 | 2005-01-19 | 华为技术有限公司 | Circuit for producing analogue damping vibration wave |
| GB0709993D0 (en) * | 2007-05-24 | 2007-07-04 | Gyrus Medical Ltd | An electrosurgical system and an electrode assembly for an electrosurgical system |
| CN102279294A (en) * | 2011-08-25 | 2011-12-14 | 江苏德顺祥电气有限公司 | Current harmonic generation device with self-compensating function |
| CN103439637B (en) * | 2013-08-14 | 2016-03-02 | 西安建筑科技大学 | A kind of wave of oscillation production method for local discharge of electrical equipment test |
| CN204256002U (en) * | 2014-09-19 | 2015-04-08 | 国家电网公司 | Apparatus for generating oscillating wave |
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| CN101349734A (en) * | 2008-09-02 | 2009-01-21 | 薛建仁 | Apparatus for generating oscillating wave for electrical apparatus test |
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