CN102624263B - Capacitance bridge inductance bridge series resonance current transformer - Google Patents
Capacitance bridge inductance bridge series resonance current transformer Download PDFInfo
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- CN102624263B CN102624263B CN201210041277.XA CN201210041277A CN102624263B CN 102624263 B CN102624263 B CN 102624263B CN 201210041277 A CN201210041277 A CN 201210041277A CN 102624263 B CN102624263 B CN 102624263B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
Capacitance bridge inductance bridge series resonance current transformer, the present invention is by electric capacity (C), inductance (containing resistance) (LR) is placed in respectively two H type switch bridges, allow electric capacity (C) and inductance (containing resistance) (LR) can change separately direction, and be together in series again and form LRC series network by switch bridge, LRC series network forms capacitance bridge inductance bridge series resonance current transformer with dc source and other related elements again. The present invention is simple in structure, controls also simply, uses different switch elements can be applied to high frequency, also can be applied to low frequency; Because electric capacity (C) can change direction by switch bridge, power conversion is simple, thorough, it is real soft switch circuit, and switch only need leave without pass, make SCR can give full play to its strong point, can be applied to frequency conversion voltage adjusting, frequency control, direct current ac converter, electromagnetic induction heating below 25KHz, also can be applied to low frequency heavy-current inductor load control.
Description
Technical field: the invention belongs to current transformer technical field.
Background technology: inductance (containing resistance) (LR) device is energy-storage travelling wave tube, and this just makes dynamic inductance loadResidue energy storage become and in dynamic inductance load control, be difficult to the problem processed, for example stepper motor, switch magneticResistance motor needs complicated power conversion circuits. Utilizing LRC series connection to vibrate can be by inductance (containing resistance) (LR)Energy storage transfer in electric capacity (C) device, but energy to changing away more here, otherwise system fortuneBe about to stop to this. For this reason, in full-bridge LRC series resonance topological structure, be provided with and allow oscillating capacitance (C)Institute's accumulate can be to the passage of power source transition, but this makes the control strategy of system become the complicated effect of conversion simultaneouslyFruit is also bad.
Summary of the invention: for solving the transfer problem of inductive load quadergy, many researchers have proposed variousSolution, and the solution of the present invention is: the LRC in full-bridge LRC series resonance topological structure is taken apart,Be placed in two H switch bridges, electric capacity (C) and inductance (containing resistance) (LR) can be changed separatelyDirection, and be together in series again by H switch bridge, form " capacitance bridge inductance bridge series resonance " network; ElectricityHold bridge inductance bridge series resonance network and can form different converters, inversion from power supply and different co-operating memberDevice. As shown in Figure 1.
Odd number brachium pontis at two H switch bridges of first half period control is opened simultaneously, even number brachium pontis closes simultaneously,In loop, can obtain the electric current of half sine wave, inductance (containing resistance) (LR) and can on electric capacity (C)To obtain a half sine wave voltage of phase place complementation; Through 1/4th LRC series resonance cycle, vibrationThe electric current of circuit reaches maximum, and oscillating capacitance (C) voltage is zero; LRC series connection through 1/2nd is humorousShake the cycle, the electric current of oscillating circuit is reduced to zero, and oscillating capacitance (C) charges to maximum.
Odd number brachium pontis at two H switch bridges of second half period control closes simultaneously, even number brachium pontis is opened simultaneously,Because of the commutation of electric capacity (C) device, the voltage of electric capacity (C) device and the stack of the voltage of power supply, at previous half cyclePhase is stored in together with the energy of the inner energy of electric capacity (C) and power supply and discharges, because inductor has also changed direction,In inductance coil, can obtain the electric current with half sine wave of previous half period opposite direction; Through fourIn/mono-LRC series resonance cycle, the electric current of oscillating circuit reaches and is greater than previous half period maximum,Oscillating capacitance (C) voltage is zero; Through 1/2nd LRC series resonance cycle, the electric current of oscillating circuitBe reduced to zero, oscillating capacitance (C) charges to and is greater than previous half period maximum.
So move in circles, (controlled frequency is less than LRC string to make control cycle be greater than the LRC series resonance cycleConnection resonant frequency), through several control cycles, in inductance coil, can reach by stable sine-wave current,Make in theory control cycle equal the LRC series resonance cycle, in inductance coil, can obtain continuous sine waveThe continuous sine voltage of electric current and inductance coil two ends.
The present invention utilizes switch bridge to make electric capacity (C) device change direction, electric capacity (C) in the next half periodThe direction of voltage is identical with the direction of supply voltage, and stack and acting in conjunction be in inductive load, and this both solvedThe energy storage of inductive load residue, solved again the secondary transfer problem of electric capacity (C) energy storage, make to transfer to electric capacity(C) energy obtains utilization cmpletely. For as stepper motor, switched reluctance machines dynamicallyInductive load, needs the soaking of high-low pressure dual power supply to drive, therefore drive system is very complicated conventionally. The present inventionTake full advantage of the energy storage of oscillating capacitance (C), become additional supply, and make inductive load obtain needsSoaking.
The present invention is simple in structure, controls also simple. Owing to having utilized LRC series connection vibration, come from dc sourceDirect current in LRC series circuit, become the alternating current that electric current can zero passage, just do not need switch elementGo to implement to turn-off action, this just makes the selection of switch element have larger leeway. Full-controlled switching elementAdvantage is can open to close, but shortcoming is that conduction time is limited, under high frequency use because of conduction time short, at itIn safety operation area, can also work; But under low frequency because need are used for long-time energising, full-controlled switch unitPart is just beyond one's ability. Because the electric current in circuit can own zero passage, oneself turn-offs and is realSoft shutoff, does not need other more elements to manufacture the environment of soft shutoff, and this just makes SCR so partlyThe switch element of control type has had ample scope for abilities, and particularly SCR can even work under direct current under low frequency, especiallyFull-controlled switching element institute is incomparable. If adopt SCR, just control and obtain than full-controlled switching element is simpleMany, can use the very little huge operating current of current drives, there is larger advantage than full-controlled switching element.
Brief description of the drawings:
Fig. 1 is the capacitance bridge inductance bridge series resonance current transformer figure of standard; Fig. 2 explains specific embodiment 3Capacitance bridge inductance series resonance current transformer figure; Fig. 3 is the capacitance bridge inductance series connection of explaining specific embodiment 2Resonance pressure regulator figure; Fig. 4 is the capacitance bridge inductance bridge series resonance current transformer figure that explains specific embodiment 1.
Detailed description of the invention:
1, as shown in Figure 4, vibration inductor is changed to transformer (T), just can be at transformer (T)Secondary obtaining exported with the alternating voltage that approaches sine wave of prime isolation output. Due to LRC series connection vibration grooveThe quality factor on road is very high, if design improperly, oscillating capacitance (C) and vibration inductance (containing resistance) are (LR)On oscillating voltage can be the several times of input voltage, even exceed switch element rated insulation voltage; If correctly establishMeter can obtain the output voltage higher than input voltage within the scope of switch element rated insulation voltage on inductor.
2, for not needing and the direct current voltage reulation of oscillation circuit level prime isolated from power, can adopt as Fig. 3Shown topological structure, he has dispensed inductance (containing resistance) switch bridge (LR), through LRC series connection grooveThe direct current on road becomes the alternating current of positive half-wave and gives filtering storage capacitor through rectification circuit, finally by filteringElectric capacity is exported to load.
3, for need to not obtain the application that approaches sine-wave current on inductive load, as stepper motor, openControl, the electromagnetic induction heating etc. of closing reluctance motor, can adopt topological structure as shown in Figure 2.
Pure inductance (containing resistance) (LR) loads under dc source driving, and its electric current is according to inductance (containing resistance)(LR) time constant exponentially curve rises, and when electric current reaches predetermined value, need to turn-off by force, so-called" firmly turn-off ", closes the inductance coil of having no progeny and remains in addition energy storage and other device need to be set he is changed away,Preferably send power supply back to.
The performance that the present invention utilizes LRC series connection vibration to dynamic inductance load control, to inductive currentRise time slightly affects (time that reaches same electric current slightly increases), makes electricity but seal in electric capacity (C)The maximum current that sense (containing resistance) (LR) can reach is restricted, and starts to subtract in the time reaching maximum currentLittle. The present invention utilizes LRC vibration, after reaching maximum, inductive current just starts to oscillating capacitance (C) charging,While all emitting to inductance electric energy, inductive current is 1 o'clock, and all inductive energy storage is transferred in electric capacity (C),Electric capacity (C) charges to electric capacity (C) both end voltage a little more than supply voltage. The present invention as for stepper motor,Switched reluctance machines, without closed-loop control, is simplified control strategy because maximum current is restricted,For having created condition without sensor control.
Oscillating capacitance (C) is placed in separately a H switch bridge by the present invention, makes the electric capacity (C) can be singleSolely change direction, electric capacity (C) voltage of transference supply voltage opposite direction forwards to identical with supply voltage directionPosition, the energy storage of electric capacity (C) can be added on power supply and discharge to inductive load. Normal for the timeThe large inductive load that number is very large, improve large inductive load and will increase in LR the response speed of power supply excitationResistance (R), and the increase of resistance (R) just bring system capacity consumption increase, heating increase. Due toCapacitance energy storage can be added in loop, can obtain the excitation of beyond supply voltage far away on inductance coil, canTo be responded fast. Because electric capacity can commutate, the residue energy storage of inductance is transformed into electric capacity not just laterNeed again to power source transition, but directly act on load as additional supply, therefore energy conversion efficiencyThe highest, loss reduction, topological structure are the simplest.
The performance that the present invention utilizes LRC series connection vibration to dynamic inductance load control, loop current is automaticZero passage, electric capacity (C) voltage leading current 90 degree reach negative maximum simultaneously, have caused best " softTurn-off " environment, create favourable condition to the application of switch element.
Claims (1)
1. capacitance bridge inductance bridge series resonance current transformer, is placed in respectively two H type switch bridges by capacitor, inductorIn, first H type switch bridge is made up of switch S 1, S2, S3, S4, second H type switch bridge bySwitch S 5, S6, S7, S8 form, one end connecting valve S1 of capacitor, the switch tie point of S4,The switch tie point of other end connecting valve S2, S3; One end connecting valve S5, the S8 of inductor opensClose tie point, the switch tie point of other end connecting valve S6, S7, forms capacitance bridge and inductance thusBridge; Described inductor contains inductance and resistance; By switch S 4, the corresponding connection of S5, switch S 3, S6 coupleShould connect, capacitance bridge and inductance bridge are together in series and form LRC series network, LRC series network again withDc source and other related elements composition capacitance bridge inductance bridge series resonance current transformer; Switch S 1, S3,S5, S7 are odd number brachium pontis, and switch S 2, S4, S6, S8 are even number brachium pontis, wherein, and at first partlyThe odd number brachium pontis of two H type switch bridges of periodic Control is opened simultaneously, even number brachium pontis closes simultaneously, can in loopTo obtain the electric current of half sine wave, on inductor and capacitor, obtain a half-sine wave electricity of phase place complementationPress; Through 1/4th LRC series resonance cycle, the electric current of oscillating circuit reaches maximum; ProcessIn 1/2nd LRC series resonance cycle, the electric current of oscillating circuit is reduced to zero, and oscillating capacitance charges toMaximum; Odd number brachium pontis at two H type switch bridges of second half period control closes simultaneously, even number brachium pontisOpen, because of the commutation of capacitor, the voltage of capacitor and the stack of the voltage of power supply, at previous half cycle simultaneouslyPhase is stored in together with the energy of energy in capacitor and power supply and discharges, in the inductance coil of inductorTo with the electric current of half sine wave of previous half period opposite direction; Go here and there through 1/4th LRC againConnection harmonic period, the electric current of oscillating circuit reaches the maximum that is greater than the previous half period; Again through two pointsOne of the LRC series resonance cycle, the electric current of oscillating circuit is reduced to zero, oscillating capacitor charges to greatlyIn the maximum of previous half period.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210041277.XA CN102624263B (en) | 2012-02-23 | 2012-02-23 | Capacitance bridge inductance bridge series resonance current transformer |
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| CN201210041277.XA CN102624263B (en) | 2012-02-23 | 2012-02-23 | Capacitance bridge inductance bridge series resonance current transformer |
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| CN102624263A CN102624263A (en) | 2012-08-01 |
| CN102624263B true CN102624263B (en) | 2016-05-18 |
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| CN107331585B (en) * | 2017-06-09 | 2019-07-23 | 西安交通大学 | A kind of electromagnetic repulsion mechanism of frequency-adjustable speed-adjustable |
| CN108039693A (en) * | 2017-09-18 | 2018-05-15 | 全球能源互联网研究院有限公司 | A kind of dc circuit breaker energy supplying system and its control method and device |
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|---|---|---|---|---|
| US5412557A (en) * | 1992-10-14 | 1995-05-02 | Electronic Power Conditioning, Inc. | Unipolar series resonant converter |
| CN1599221A (en) * | 2004-07-23 | 2005-03-23 | 西安交通大学 | Single-phase large power single-stage converter topological and control method based on bridge circuit |
| CN1770614A (en) * | 2004-11-01 | 2006-05-10 | 福州大学 | Resonant soft-switching inversion circuit |
| CN1933307A (en) * | 2006-08-31 | 2007-03-21 | 上海交通大学 | Active passive mixed single phase power factor correcting circuit |
| US7817452B2 (en) * | 2007-08-13 | 2010-10-19 | Stephen William Smith | Phase shifted H-Bridge resonant converter with symmetrical currents |
| CN201774270U (en) * | 2010-07-22 | 2011-03-23 | 荣信电力电子股份有限公司 | Transformer-free inductive energy storage topological structure |
-
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- 2012-02-23 CN CN201210041277.XA patent/CN102624263B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5412557A (en) * | 1992-10-14 | 1995-05-02 | Electronic Power Conditioning, Inc. | Unipolar series resonant converter |
| CN1599221A (en) * | 2004-07-23 | 2005-03-23 | 西安交通大学 | Single-phase large power single-stage converter topological and control method based on bridge circuit |
| CN1770614A (en) * | 2004-11-01 | 2006-05-10 | 福州大学 | Resonant soft-switching inversion circuit |
| CN1933307A (en) * | 2006-08-31 | 2007-03-21 | 上海交通大学 | Active passive mixed single phase power factor correcting circuit |
| US7817452B2 (en) * | 2007-08-13 | 2010-10-19 | Stephen William Smith | Phase shifted H-Bridge resonant converter with symmetrical currents |
| CN201774270U (en) * | 2010-07-22 | 2011-03-23 | 荣信电力电子股份有限公司 | Transformer-free inductive energy storage topological structure |
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Addressee: Chen Yiding Document name: Notification of Publication and of Entering the Substantive Examination Stage of the Application for Invention |
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Effective date of registration: 20200629 Address after: Room 1501-02, 15 / F, building B2, 700 Yishan Road, Xuhui District, Shanghai, 200233 Patentee after: Shanghai Zhuoyue Medical Technology Co., Ltd Address before: 650216, Kunming District, Yunnan province Guandu Shuguang Eastern Railway District 4, building 2, unit 601 Patentee before: Chen Yiding |
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