CN202034832U - Non-contact power transmitting device with self-adaptation power factor correction function - Google Patents
Non-contact power transmitting device with self-adaptation power factor correction function Download PDFInfo
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- CN202034832U CN202034832U CN2011201013087U CN201120101308U CN202034832U CN 202034832 U CN202034832 U CN 202034832U CN 2011201013087 U CN2011201013087 U CN 2011201013087U CN 201120101308 U CN201120101308 U CN 201120101308U CN 202034832 U CN202034832 U CN 202034832U
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Abstract
The utility model discloses a non-contact power transmitting device with a self-adaptation power factor correction function, which adopts an AC/DC/AC energy converting form, realizes functions of active power factor correction and resonance inversion by the aid of a structure consisting of a diode rectifier bridge and double half-bridge switches, and realizes functions of reactive power compensation and load self-adaptation by the aid of a structure of three-stage resonance network. The device is simple in control mode and only needs to add driving signals with constant frequencies and constant duty ratio to the double half-bridge switches. The non-contact power transmitting device with the self-adaptation power factor correction function solves the problems of low output power, high harmonic wave pollution, poor load adaptability and the like in current non-contact power transmitting technique, can be widely applicable to movable hoisting devices in factories, mine digging and conveying devices, power and underground locomotives, and various places such as factories and mines and the like with inflammable and explosive gases.
Description
Technical field
The utility model relates to a kind of non-contact electric energy transmitting device and control method thereof, relates in particular to and a kind ofly can realize resonance inversion, promotes power output, carries out Active Power Factor Correction, can adapt to the different loads situation and keep the non-contact electric energy transmitting device and the control method thereof of system stability.
Background technology
Current, (move hanging device for the power consumption equipment that moves as factory, coal mine excavation and transporting equipment, electric power and underground engines, city such as trolley bus, light rail passenger-carrying vehicle) in the electric power system, generally adopts the direct conduction pattern of contact electric energy (comprising direct lead transmission means, sliding contacting mode and the rolling way of contact).There is various problems in this electric energy transmitting pattern, for example exposed, the mechanism wear of lead, contact sparking etc., bring very big problem to safe power supply, especially in some more special occasions (for example containing the factories and miness, workshop of various flammable explosive gas etc.), the existence of contact electric spark may bring major disaster to activity in production.Therefore, expansion along with people's life and activity in production scope, traditional lead direct contact type electric energy transmitting mode can not satisfy produces and the requirement of life, and people press for a kind of novel electric energy transmitting form and satisfy power demands under novel electric equipment and the various specific condition.
The non-contact electric energy transmission technology can overcome that traditional method of supplying power to exists such as limitations such as skimming wear, contact sparking, mechanism wear and dangerous bare exposed conductor.This technology is separated the induction coupling magnetic circuit of traditional transformer, realize that the energy that no physics is connected between power supply and the load unit is coupled, developed at present and the three major types non-contact electric energy transmission system: 1. used electromagnetic induction principle, two coils are positioned over adjacent locations, the media that utilizes magnetic flux to form produces electromotive force and carries out power transfer in coupling coil; 2. directly using the electric wave energy can utilize the electric wave waveform that receives in rectification circuit by the principle of antenna transmission and acceptance in addition after the conversion process; 3. utilize the resonance method (two object energy high efficiency of transmission energy that vibration frequency is identical) of electromagnetic field, make vibrotron, one skein circle is attached to and transmits electric power side, another group is accepting electric power side, send the electromagnetic wave of certain characteristic frequency as the sender after, be diffused into reciever through electromagnetic field, electric power has just been realized wireless conduction.
The non-contact electric energy transmission technology can be applied in the multiple industrial occasions, but the restriction of switching frequency has restricted further developing of non-contact electric energy transmission technology.This is because electric energy is transmitted in the air, obtains higher coupling efficiency, the tranmitting frequency of having relatively high expectations, and general switching tube upper frequency limits such as IGBT are also only at tens kHz.The frequency of utilization of switching tube is brought up to the rapid decline that to a certain degree can cause system effectiveness, and might cause switching tube to burn.Must adopt the method for controlled resonant converter like this, with the power frequency in the transmitting coil after the maximum raising inversion.
In addition, in occasions such as machine driving, track traffic, it is higher to be used to drive power demand.Realize the utilization of non-contact electric energy transmission technology in these occasions, the inverter with high power output is necessary.Have certain methods to make inverter power big, wherein the most direct is that system's input voltage is promoted than good method.Yet generally speaking, the input voltage that changes merely on the electrical energy transformer can run into the many-sided difficulties of actual service conditions such as cost and space to a great extent.
In non-contact electric energy transmission system, need direct voltage and be input to inverter, thereby carry out the non-contact electric energy transmission to produce the high-frequency emission electric current.But in actual use, be difficult to find direct DC power supply usually, the direct voltage that uses in industry is all by the industrial frequency AC electric rectification.So just brought the problem of harmonic wave, particularly when the non-contact electric energy transmission applied to powerful occasion, the high-current harmonic problem that causes was especially obvious.Therefore limiting the harmonic wave extent of injury, make it satisfy the corresponding regulation that relevant departments make, also is the problem that the noncontact electric energy transmission technology need solve.
In the non-contact electric energy transmission system of fixed frequency, running frequency is a rated frequency.Want power delivery to reach maximum, secondary compensation electric capacity must equate with the resonance compensation electric capacity under this frequency.If but descend owing to temperature rise causes electric capacity, through-put power will inevitably descend.In order to guarantee power output, need to increase primary supply voltage or voltage, thereby apparent power is increased.If adopt frequency-variable controller then can make system operate in the zero phase angle Frequency point of power end load impedance always.System power supply only need provide the active power that consumes in the system, has reduced the apparent power to power supply.But this moment, another problem of appearance is if in spectral range, when having a plurality of zero phase angle points to exist, so just is difficult to determine the ideal control point.
When the load of non-contact electric energy transmission system changes, can directly cause the change of its resonance frequency, at this moment confusion can take place in the FREQUENCY CONTROL of system, causes system's instability.And depart from ideal value to a certain degree the time when the running frequency of power supply, may cause the power delivery ability of system greatly to descend.Guarantee the stability of system and increase the power delivery ability, just must guarantee that under variable loads system still can self-adapting resonance.
Summary of the invention
Technical problem:The purpose of this utility model is the deficiency that overcomes existing non-contact electric energy transmission technology implementation, proposes a kind ofly can to realize resonance inversion, promotes power output, carries out Active Power Factor Correction, can adapt to the different loads situation and keep the non-contact electric energy transmitting device of system stability.
Technical scheme:The non-contact electric energy transmitting device of band adaptive power factor correcting of the present utility model comprises that promptly first rectifier diode, second rectifier diode, the 3rd rectifier diode, the 4th rectifier diode are formed the first uncontrollable rectifier bridge to four rectifier diodes, one utmost point of the input of the first uncontrollable rectifier bridge is connected to input power supply one by input inductance and extremely goes up, another utmost point of the first uncontrollable rectifier bridge input is directly connected to the input power supply, and another extremely goes up the output parallel voltage-stabilizing electric capacity of the first uncontrollable rectifier bridge; Promptly first inverter power tube, second inverter power tube are composed in series the inversion half-bridge to two inverter power tube, the two ends of inversion half-bridge are input and the two ends that are connected respectively to electric capacity of voltage regulation, the two ends of first inverter power tube first buffer capacitor in parallel, the two ends of second inverter power tube second buffer capacitor in parallel; The two ends of second inverter power tube are the output of inversion half-bridge; Two filter capacitors are that first filter capacitor, second filter capacitor are in series and are connected on the first uncontrollable rectifier bridge input, and its common point links to each other by the mid point of boost inductance with the inversion half-bridge.
Compensating element, is that electric capacity or inductance are connected with the loosely coupled transformer primary side, and is connected the two ends of second inverter power tube; Resonant capacitance is in parallel with the loosely coupled transformer primary side.
The loosely coupled transformer secondary side links to each other with rectification load, also promptly four rectifier diodes are that the 5th rectifier diode, the 6th rectifier diode, the 7th rectifier diode, the 8th rectifier diode are formed the second uncontrollable rectifier bridge, and the loosely coupled transformer secondary side links to each other with the input of the second uncontrollable rectifier bridge; Be connected to the output of the second uncontrollable rectifier bridge after filter inductance and the series connection of the 3rd filter capacitor; Load is in parallel with the 3rd filter capacitor.
Loose coupling pressure-changing secondary side links to each other with non-rectification load, also is that loose coupling pressure-changing secondary side links to each other with the 3rd filter capacitor, and load is in parallel with the 3rd filter capacitor.
The control method of the non-contact electric energy transmitting device of band adaptive power factor correcting of the present utility model is: apply first drive signal, second drive signal of same period T on first inverter power tube, second inverter power tube respectively, and two driving signal frequency is constant, duty ratio is constant; First drive signal, second drive signal can not apply simultaneously; In each drive signal in the cycle in the T, satisfy between the Dead Time Td between the time T on2 that the time T on1 that first drive signal applies, second drive signal apply, two signals and concern Ton1+Ton2+2Td=T; Regulate the length of application time Ton1, Ton2 and come the output voltage and the power output of adjusting device, come boosted output voltages and power output by increasing application time ratio Ton1/Ton2, reduce application time ratio Ton1/Ton2 and reduce output voltage and power output.
Beneficial effect:
(1) system resonance inversion, the power that switching tube consumes in the process that turns on and off are approximately zero, also are that switching loss is approximately zero, have realized the function of soft switch;
(2) this device circuit has the function of boost converter, thereby the DC bus-bar voltage that raise has promoted the power output of system;
(3) input current has well been followed the tracks of input voltage, i.e. voltage and electric current same-phase have realized the purpose of power factor correction;
(4) this device has certain adaptability to load variations, can both keep stable resonance inversion when load is situations such as pure resistive, resistance sense, capacitance-resistance, rectification load;
(5) whole apparatus system is relatively simple for structure, and control is convenient.
Description of drawings
The principle schematic of Fig. 1 non-contact electric energy transmission system,
Fig. 2 structural representation of the present utility model,
The structural representation of Fig. 3 the utility model another embodiment,
Fig. 4 power tube drive waveforms of the present utility model schematic diagram
The course of work schematic diagram of Fig. 5 the utility model circuit when input voltage is positive half cycle,
The course of work schematic diagram of Fig. 6 the utility model circuit when input voltage is negative half period.
Have among the figure: input power supply 1, input inductance 2, first filter capacitor 3, second filter capacitor 4, first rectifier diode 5, second rectifier diode 6, the 3rd rectifier diode 7, the 4th rectifier diode 8, boost inductance 9, electric capacity of voltage regulation 10, first inverter power tube 11, second inverter power tube 12, first buffer capacitor 13, second buffer capacitor 14, resonant capacitance 15, loosely coupled transformer primary side 16, loosely coupled transformer secondary side 17, the 5th rectifier diode 18, the 6th rectifier diode 19, the 7th rectifier diode 20, the 8th rectifier diode 21, filter inductance 22, the 3rd filter capacitor 23, load 24, the mid point 25 of inversion half-bridge, compensating element, 26.
Embodiment
Be illustrated in figure 1 as the principle schematic of non-contact electric energy transmission system, as seen from the figure, non-contact electric energy transmission system can be divided into primary return and secondary loop two large divisions, and be connected with load equipment with powersupply system respectively, first, inferior two loop levels realize the non-contact electric energy transmission by the magnetic field of space coupling.The effect of primary return is that power supply is produced high-frequency current after the high-frequency inversion conversion, in transmitting coil, launch, interrogation energy near the variation magnetic field of the less air gap of the pick-up winding in the secondary loop primary return transmitting coil, through energy converter high-frequency electrical energy is converted into the form of energy that load equipment needs, this has just finished whole noncontact power transfer process.
Be illustrated in figure 2 as structural representation of the present utility model, four rectifier diodes 5～8 are formed uncontrollable rectifier bridge, and its input links to each other with power frequency supply by input inductance 2, and its output is connected on the positive and negative electrode of electric capacity of voltage regulation 10.First inverter power tube 11, second inverter power tube 12 are formed the inversion half-bridges, each power tube is all in parallel buffer capacitor, and the input of inversion half-bridge is connected on the positive and negative electrode of electric capacity of voltage regulation 10, and the two ends of power tube 12 are the output of inversion half-bridge.Two filter capacitors, boost inductances 9 connect into star structure, and capacitance terminal links to each other with uncontrollable rectifier bridge input, and the inductance end links to each other with the mid point 25 of inversion half-bridge.It is inductance that compensating element, 26 is formed LCL(compensating element,s 26 with equivalent inductance, the resonant capacitance 15 of loosely coupled transformer primary side 16) or CCL(compensating element, 26 be electric capacity) three rank resonant networks of form, compensating element, 26 selects electric capacity or inductance to depend on the parameter of back grade.Loose coupling pressure-changing secondary side 17 links to each other with rectification load.
The compensating action that three rank resonant networks have the loosely coupled transformer leakage inductance makes device be operated in the resonance inversion state, and first buffer capacitor 13,14 of second buffer capacitors make device can realize soft switch.Boost inductance 9 and first inverter power tube 11, second inverter power tube 12 cooperate the function of finishing the boost chopper, and the voltage of the dc bus electric capacity of voltage regulation 10 that has been equivalent to raise has promoted power output.First filter capacitor 3, second filter capacitor 4, input inductance 2 are formed low pass filter, also provide mid point (common point of first filter capacitor 3, second filter capacitor 4) for the boost chopper simultaneously.
And the chopper circuit that constitutes of boost inductance 9, first inverter power tube 11, second inverter power tube 12, electric capacity of voltage regulation 10, can control the electric current of rectifier bridge (first rectifier diode 5, second rectifier diode 6, the 3rd rectifier diode 7, the 4th rectifier diode 8) output, make it follow the tracks of sinusoidal voltage, finally make the input current of system follow the tracks of input voltage, realize the function of Active Power Factor Correction (APFC).
And the converter that three rank resonant networks (LCL type or CCL type) are realized has the two-fold advantage of series resonance and parallel resonance: stabilized voltage characteristic will be got well than series resonance, and stabilized current characteristic also will be got well than parallel resonance, so the adaptive load ability is strong.So except that rectification load, change its load form as shown in Figure 3, when being pure resistive, resistance sense, capacitance-resistance, load can both keep system stability, realize resonance.
The control of this circuit is simple, only needs the driving model that frequency is constant, duty ratio is constant, and shown in 4, Ton1, Ton2 are the time that the switching tube drive signal applies in each switch periods T, and Td is the Dead Time between the drive signal.In fact, two switches can adopt asymmetric drive sequences, and promptly Ton1 and Ton2 are unequal.The length of regulating application time Ton1, Ton2 is the output voltage and the power output of adjustable apparatus, output voltage, power output raise when increasing application time ratio Ton1/Ton2, otherwise output voltage, power output reduce when reducing application time ratio Ton1/Ton2.
Replace back level equivalent capacity, inductance, resistance respectively with Cs, Lp, RLeq, circuit working pattern and switch switch mode as shown in Figure 5 when input voltage is positive half cycle.Under the stable situation, converter is that the resonant process of positive half cycle will change through following mode at input voltage:
Mode 1: the IGBT conducting among the switching tube S1 promptly enters mode 1.Under this mode, Ds1 is the diode of unique conducting in the rectifier bridge.
Mode 2: turn-off when switching tube S1 realizes no-voltage, circuit promptly enters mode 2.Under this mode, the Ds1 conducting is still only arranged in the rectifier bridge, the buffer capacitor Cs1 of last brachium pontis switching tube S1 is recharged so its voltage rises, the buffer capacitor Cs2 of following brachium pontis switching tube S2 after be elevated voltage VCb discharge thus its voltage descend.
Mode 3: after buffer capacitor Cs1 and Cs2 finished charging, discharge process respectively, circuit entered mode 3.This moment, diode Ds1 continued to keep conducting, and the inverse parallel diode D2 among the switching tube S2 is also open-minded.
Mode 4: switching tube S2 obtains drive signal, and circuit promptly enters mode 4.This stage D s1 keeps conducting, and switching tube S2 realizes that also no-voltage is open-minded.
Mode 5: when diode Ds1 realizes zero-current switching, current switching enters mode 5 during to Ds4.This moment, inductance L b and S2 cooperated the function that constitutes the boost booster circuit.
Mode 6: this pattern starts from the S2 no-voltage and turn-offs.Rectifier bridge is diode Ds4 conducting only, and the buffer capacitor Cs1 of last brachium pontis switching tube S1 is risen by charge its voltage of resonance current, and the Cs2 discharge voltage descends simultaneously.
Mode 7: in case buffer capacitor Cs1, Cs2 finish discharge, charging process respectively, mode 7 beginnings.Current path switches to the antiparallel D1 of switching tube S1 from Cs1, and Ds4 continues to keep conducting.
Mode 8: when the Ds4 zero-current switching, circuit entered mode 8 when the Ds1 no-voltage was opened.This mode ends at the soft switch conduction of switching tube S1.So far, circuit is finished the course of work of a complete cycle.
Circuit working pattern and switch switch mode as shown in Figure 6 when input voltage is negative half period, similar when its each mode and input voltage are positive half cycle, the relation that also presents antithesis, corresponding each mode diode current flow switch corresponds to Ds3, Ds2 respectively by Ds1, Ds4.
Claims (2)
1. non-contact electric energy transmitting device with the adaptive power factor correcting, it is characterized in that i.e. first rectifier diode (5) of four rectifier diodes, second rectifier diode (6), the 3rd rectifier diode (7), the 4th rectifier diode (8) is formed the first uncontrollable rectifier bridge, one utmost point of the input of the first uncontrollable rectifier bridge is connected to input power supply (1) by input inductance (2) and extremely goes up, another utmost point of the first uncontrollable rectifier bridge input is directly connected to input power supply (1), and another extremely goes up the output parallel voltage-stabilizing electric capacity (10) of the first uncontrollable rectifier bridge; Promptly first inverter power tube (11), second inverter power tube (12) are composed in series the inversion half-bridge to two inverter power tube, the two ends of inversion half-bridge are input and the two ends that are connected respectively to electric capacity of voltage regulation (10), the two ends of first inverter power tube (11) first buffer capacitor (13) in parallel, the two ends of second inverter power tube (12) second buffer capacitor (14) in parallel; The two ends of second inverter power tube (12) are the output of inversion half-bridge; Two filter capacitors are that first filter capacitor (3), second filter capacitor (4) are in series and are connected on the first uncontrollable rectifier bridge input, and its common point links to each other with the mid point (25) of inversion half-bridge by boost inductance (9).
2. the non-contact electric energy transmitting device of band adaptive power factor correcting according to claim 1, it is characterized in that compensating element, (26) is that electric capacity or inductance are connected with loosely coupled transformer primary side (16), and be connected the two ends of second inverter power tube (12); Resonant capacitance (15) is in parallel with loosely coupled transformer primary side (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201013087U CN202034832U (en) | 2011-04-08 | 2011-04-08 | Non-contact power transmitting device with self-adaptation power factor correction function |
| CN2011100880953A CN102130515A (en) | 2011-04-08 | 2011-04-08 | Non-contact power transmission device and control method with adaptive power factor correction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201013087U CN202034832U (en) | 2011-04-08 | 2011-04-08 | Non-contact power transmitting device with self-adaptation power factor correction function |
| CN2011100880953A CN102130515A (en) | 2011-04-08 | 2011-04-08 | Non-contact power transmission device and control method with adaptive power factor correction |
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| CN2011201013087U Expired - Fee Related CN202034832U (en) | 2011-04-08 | 2011-04-08 | Non-contact power transmitting device with self-adaptation power factor correction function |
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| CN102130515A (en) * | 2011-04-08 | 2011-07-20 | 东南大学 | Non-contact power transmission device and control method with adaptive power factor correction |
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN102969802A (en) * | 2012-11-01 | 2013-03-13 | 重庆大学 | Current type wireless power supply system load self-adapting control method |
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| CN102005930A (en) * | 2009-09-03 | 2011-04-06 | 天津工程师范学院 | Non-contact electric energy transmission system |
| CN101719726B (en) * | 2009-12-04 | 2011-10-26 | 重庆大学 | Method and device for non-contact type synchronous transmission of energy and signal |
| CN101789637B (en) * | 2010-02-26 | 2013-01-02 | 南京博兰得电子科技有限公司 | Inductive coupling type electric energy transmission device |
| CN102130515A (en) * | 2011-04-08 | 2011-07-20 | 东南大学 | Non-contact power transmission device and control method with adaptive power factor correction |
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2011
- 2011-04-08 CN CN2011100880953A patent/CN102130515A/en active Pending
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Cited By (13)
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|---|---|---|---|---|
| CN102130515A (en) * | 2011-04-08 | 2011-07-20 | 东南大学 | Non-contact power transmission device and control method with adaptive power factor correction |
| CN103988392A (en) * | 2011-12-09 | 2014-08-13 | 株式会社丰田自动织机 | Contactless power transmission device |
| CN102447494A (en) * | 2011-12-31 | 2012-05-09 | 上海贝岭股份有限公司 | Broadband coupling circuit for multicarrier communication |
| CN103259445A (en) * | 2012-02-16 | 2013-08-21 | 阳光电源股份有限公司 | Inverter power source device |
| CN103368276A (en) * | 2012-04-05 | 2013-10-23 | 罗伯特·博世有限公司 | Wireless energy transmission |
| CN102969802B (en) * | 2012-11-01 | 2014-07-16 | 重庆大学 | Current type wireless power supply system load self-adapting control method |
| CN102969802A (en) * | 2012-11-01 | 2013-03-13 | 重庆大学 | Current type wireless power supply system load self-adapting control method |
| CN104124863A (en) * | 2013-04-28 | 2014-10-29 | 海尔集团技术研发中心 | Method and system for power factor correction based on radio energy transmission system |
| CN106160247A (en) * | 2014-10-20 | 2016-11-23 | 三星电机株式会社 | For wirelessly sending the equipment of electric power |
| US10027130B2 (en) | 2014-10-20 | 2018-07-17 | Samsung Electro-Mechanics Co., Ltd. | Apparatus for transmitting power wirelessly |
| US10790675B2 (en) | 2014-10-20 | 2020-09-29 | Wits Co., Ltd. | Apparatus for transmitting power wirelessly |
| CN115189451A (en) * | 2022-07-26 | 2022-10-14 | 上海陆芯电子科技有限公司 | Charger system |
| CN115189451B (en) * | 2022-07-26 | 2023-10-03 | 上海陆芯电子科技有限公司 | Charger system |
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| Publication number | Publication date |
|---|---|
| CN102130515A (en) | 2011-07-20 |
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