CN202231500U - Non-contact charger capable of automatic tracking of resonant frequency of switch power circuit - Google Patents
Non-contact charger capable of automatic tracking of resonant frequency of switch power circuit Download PDFInfo
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- CN202231500U CN202231500U CN2011203119419U CN201120311941U CN202231500U CN 202231500 U CN202231500 U CN 202231500U CN 2011203119419 U CN2011203119419 U CN 2011203119419U CN 201120311941 U CN201120311941 U CN 201120311941U CN 202231500 U CN202231500 U CN 202231500U
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Abstract
The utility model relates to a non-contact charger capable of automatic tracking of the resonant frequency of a switch power circuit. The non-contact charger comprises an asymmetric half-bridge series connection resonance circuit, a current chopper voltage stabilizing circuit, a separable transformer and a series connection resonant frequency tracking control circuit. The asymmetric half-bridge series connection resonance circuit is connected with the separable transformer and a series connection resonant frequency tracking controller. The separable transformer is connected with the current chopper voltage stabilizing circuit. The asymmetric half-bridge series connection resonance circuit is adopted by the original edge side of the separable transformer of the non-contact charger, and the current chopper voltage stabilizing circuit is adopted by the secondary edge side of the separable transformer. The asymmetric half-bridge series connection resonance circuit is working in a resonant state under the control of the series connection resonant frequency tracking control circuit, and sine wave current is output. The stability of output voltage is controlled by the current chopper voltage stabilizing circuit via chopper waves. The non-contact charger of the utility model enables stability and loading capability of a charger system to be improved, and allows switch stress and loss to be minimized.
Description
Technical field
The utility model relate to a kind of can be from the non-contact charger of motion tracking power circuit resonance frequency, be suitable for the non-contact charger of making portable electronic products.
Background technology
Traditional charging technique of electric equipment is mainly directly contacted by lead and carries out; Generally supply power the problem of that this charging modes exists is dangerous, move very flexible, be not suitable for adverse circumstances (moist, explosive) and special occasions etc. under water, through the contact of plug and socket.Non-contact charge technology based on the electromagnetic induction coupling principle; Compare with traditional contact charging technique; It not only overcome existing charging technique intrinsic by the lead contact brought like electric spark, connect inconvenience and security problems; Be specially adapted to power supply occasions such as inflammable, explosive, moist, moving object (like electric motor car etc.), implant into body medical device; But also can be embedded in the occasion that needs power supply easily, and realize power supply whenever and wherever possible, have good application prospect.
Because the former avris of high-frequency power transformer of non-contact charger and secondary side are not fixing assemblings; Be to separate movably, there is bigger air gap the centre, thereby causes that transformer leakage inductance is big, magnetizing inductance less (so this high frequency transformer is also referred to as separable transformer or loosely coupled transformer); Not only on switching device, produce bigger voltage stress and switching loss and more high frequency leakage magnetic field; And influence the stability of non-contact charger system and the ability of electric energy transmitting, therefore for improving the efficient and the stability of non-contact charger system, when research and design noncontact induction charging system; Must consider the influence of leakage inductance, magnetizing inductance; And the leakage inductance of utilizing transformer is optimal selection as the series resonant converter topology of resonant inductance, not only can eliminate the due to voltage spikes that leakage inductance causes, and reduces the stress of switching device; Reduce electromagnetic interference and electromagnetic noise, realize zero current or ZVT.And, also can improve the ability that energy emission of the former limit of separable transformer and secondary energy receive because resonance can provide sinusoidal waveform electric current preferably.But the non-contact charger of using for portable electronic products; Because the position that portable electronic products (the electric energy receiving terminal of charger or the secondary side of separable transformer) is placed on (the former avris of separable transformer) on the transmitting terminal of charger more at random; Be separable transformer secondary coil and primary coil correspondence position more at random; This will make the leakage inductance of separable transformer and magnetizing inductance change greatly; Thereby the natural resonance frequency of series resonant circuit is changed, cause Circuits System ability unstable and transmission of power to reduce.
Summary of the invention
The utility model purpose provide a kind of can be from the non-contact charger of motion tracking power circuit resonance frequency, be suitable for the non-contact charger of making portable electronic products.Having the contactor frequency can the automatic tracking circuit natural resonance frequency, makes circuit working in resonance condition, thereby improves advantages such as Circuits System stability and transmission of power ability.
The utility model adopts following scheme to realize: a kind ofly can comprise asymmetrical half-bridge series resonant circuit, current chopping voltage stabilizing circuit, separable transformer, series resonance frequency follow-up control circuit from the non-contact charger of motion tracking switch power circuit resonant frequencies; It is characterized in that: said asymmetrical half-bridge series resonant circuit connects separable transformer and series resonance frequency tracking control unit, and said separable transformer connects the current chopping voltage stabilizing circuit; The leakage inductance that said asymmetrical half-bridge series resonant circuit utilizes separable transformer is as resonant inductance; Through detecting the electric current of the former avris of separable transformer, the switching tube operating frequency of guaranteeing the asymmetrical half-bridge series resonant circuit by the control of series resonance frequency follow-up control circuit is from motion tracking resonant circuit natural resonance frequency; Said current chopping voltage stabilizing circuit is through detecting the Current Control output voltage stabilization of output voltage, separable transformer secondary side.
In the utility model one embodiment; Said asymmetrical half-bridge series resonant circuit is made up of the equivalent leakage inductance Lp and the magnetizing inductance Lm of switching tube Q1, Q2, resonant capacitance Cp and separable transformer; The source electrode of described switching tube Q1, the drain electrode of Q2 are connected with former limit one end of separable transformer through described resonant capacitance Cp, and the former limit other end of said separable transformer is connected with the source electrode of said switching tube Q2.
In the utility model one embodiment; Described series resonance frequency follow-up control circuit; Utilize the phase-locked loop circuit structure, through the former avris electric current of sampling separable transformer, output can drive described switching tube Q1, Q2 from the switching signal of motion tracking series resonant circuit natural resonance frequency.
In the utility model one embodiment; Said current chopping voltage stabilizing circuit is by diode D1, D2, D3, D4, D5, and switching tube Q3 constitutes, through sampling and outputting voltage and separable transformer secondary side electric current; Send the angle of flow of Signal-controlled switch pipe Q3 then, make output voltage stabilization.
In the utility model one embodiment, described series resonance frequency follow-up control circuit based on PHASE-LOCKED LOOP PLL TECHNIQUE is to adopt phase-locked loop CD4046 chip design to realize.
The utility model advantage: owing to adopt technology of frequency tracking based on phase-locked loop; Can make the switching frequency of asymmetrical half-bridge series resonant circuit follow the tracks of the natural resonance frequency of power resonance circuit constantly; The former avris electric current of separable transformer levels off to sine wave, thereby not only makes the asymmetrical half-bridge switch can work in soft on off state, reduces switch stress and loss; And improved separable transformer and transmitted the electric energy ability, make charger circuit system steady operation more.Simultaneously adopt first full-bridge rectification at the separable transformer secondary, and then the current chopping voltage stabilizing circuit, not only make the charger output voltage stabilization, and load capacity is strong.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the power circuit schematic diagram of the utility model.
Fig. 3 is the separable transformer structural representation.
Fig. 4 is a separable transformer figure equivalent circuit diagram.
Fig. 5 is the utility model embodiment circuit theory diagrams.
Embodiment
Execution mode to the utility model specifies with reference to the accompanying drawings.
As shown in Figure 1, present embodiment is made up of asymmetrical half-bridge series resonant circuit 1, separable transformer 2, current chopping voltage stabilizing circuit 3, series resonance frequency follow-up control circuit 4.Asymmetrical half-bridge series resonant circuit 1 is under 4 controls of series resonance frequency follow-up control circuit; The switching frequency automatic tracking circuit natural resonance frequency of circuit; Circuit working is in resonance condition, makes that former avris electric current is to level off to sinusoidal wave electric current, and this electric current passes to the secondary side by separable transformer 3; Through current chopping voltage stabilizing circuit 2, the output galvanic current is pressed.
Please continue with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5, be example with phase-locked loop CD4046 chip here, wherein; Fig. 2 is the power circuit schematic diagram; Fig. 3 is the separable transformer structural representation, and Fig. 4 is its equivalent circuit diagram of separable transformer, and Fig. 5 is the utility model embodiment circuit theory diagrams.
In the embodiment circuit: asymmetrical half-bridge series resonant circuit 1 is by switching tube Q1, Q2, and the equivalent leakage inductance Lp of resonant capacitance Cp and separable transformer 2 (Tc) and magnetizing inductance Lm constitute.
Series resonance frequency follow-up control circuit 4 is by phase-locked loop chip CD4046 and peripheral circuit resistance R 4, R6, R7, R8, R9, R10, R11, R14; Capacitor C 2, C4, C5, C6, C7; Diode D6, D7, D8, comparator C omp1, inverter ic 1, IC2, IC2 constitute; Wherein resistance R 4, R6; Capacitor C 2, C5, diode D6, D7 and inverter ic 1, IC2, IC2 are the complementary drive signal that generates the phase-locked loop signal of CD4046 output in two-way band dead band, driving switch pipe Q1, Q2 respectively.Based on PHASE-LOCKED LOOP PLL TECHNIQUE, the former avris electric current that resistance R sp sampling obtains makes the electric current in the former avris circuit approach sine wave through control signal control switch pipe Q1, the Q2 of output ability automatic tracking circuit natural resonance frequency behind this circuit.
Current chopping voltage stabilizing circuit 3 main circuits are by diode D1, D2, D3, D4, D5, switching tube Q3, and capacitor C o constitutes, and control circuit is by amplifier Am1, Am2, comparator C omp2 and resistance R 1, R2, R3, R5, R12, R13, capacitor C 3 constitutes.Control circuit is through resistance R 1, R2 sampling and outputting voltage and resistance R ss sampling secondary side electric current; Pass through signal amplification circuit Am1, Am2 again; Then through comparator C omp2 relatively these two signals; Thereby generating with secondary side electric current is the synchronizing signal of benchmark, is used to control the angle of flow of Q3 pipe, makes output voltage stabilization.
The non-contact charger series resonance frequency follow-up control circuit 4 that is used for portable electronic products of the utility model is to realize with phase-locked loop chip CD4046; Separable transformer 2 former avris connect asymmetrical half-bridge series resonant circuit 1; Separable transformer 2 secondary side joint current chopping voltage stabilizing circuits 3; Asymmetrical half-bridge series resonant circuit 1 works in resonance condition, the sine wave output electric current, and current chopping voltage stabilizing circuit 3 is stable through the copped wave control output voltage.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model.
Claims (5)
1. an ability comprises asymmetrical half-bridge series resonant circuit, current chopping voltage stabilizing circuit, separable transformer, series resonance frequency follow-up control circuit from the non-contact charger of motion tracking switch power circuit resonant frequencies; It is characterized in that: said asymmetrical half-bridge series resonant circuit connects separable transformer and series resonance frequency tracking control unit, and said separable transformer connects the current chopping voltage stabilizing circuit; The leakage inductance that said asymmetrical half-bridge series resonant circuit utilizes separable transformer is as resonant inductance; Through detecting the electric current of the former avris of separable transformer, the switching tube operating frequency of guaranteeing the asymmetrical half-bridge series resonant circuit by the control of series resonance frequency follow-up control circuit is from motion tracking resonant circuit natural resonance frequency; Said current chopping voltage stabilizing circuit is through detecting the Current Control output voltage stabilization of output voltage, separable transformer secondary side.
2. according to claim 1 can be from the non-contact charger of motion tracking switch power circuit resonant frequencies; It is characterized in that: said asymmetrical half-bridge series resonant circuit is made up of the equivalent leakage inductance Lp and the magnetizing inductance Lm of switching tube Q1, Q2, resonant capacitance Cp and separable transformer; The source electrode of described switching tube Q1, the drain electrode of Q2 are connected with former limit one end of separable transformer through described resonant capacitance Cp, and the former limit other end of said separable transformer is connected with the source electrode of said switching tube Q2.
3. according to claim 2 can be from the non-contact charger of motion tracking switch power circuit resonant frequencies; It is characterized in that: described series resonance frequency follow-up control circuit; Utilize the phase-locked loop circuit structure; Through the former avris electric current of sampling separable transformer, output can drive described switching tube Q1, Q2 from the switching signal of motion tracking series resonant circuit natural resonance frequency.
4. according to claim 1 can be from the non-contact charger of motion tracking switch power circuit resonant frequencies; It is characterized in that: said current chopping voltage stabilizing circuit is by diode D1, D2, D3, D4, D5; Switching tube Q3 constitutes; Through sampling and outputting voltage and separable transformer secondary side electric current, send the angle of flow of Signal-controlled switch pipe Q3 then, make output voltage stabilization.
5. according to claim 1 can it is characterized in that from the non-contact charger of motion tracking switch power circuit resonant frequencies: described series resonance frequency follow-up control circuit adopts phase-locked loop CD4046 chip design to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203119419U CN202231500U (en) | 2011-08-24 | 2011-08-24 | Non-contact charger capable of automatic tracking of resonant frequency of switch power circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203119419U CN202231500U (en) | 2011-08-24 | 2011-08-24 | Non-contact charger capable of automatic tracking of resonant frequency of switch power circuit |
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| CN202231500U true CN202231500U (en) | 2012-05-23 |
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| CN2011203119419U Expired - Fee Related CN202231500U (en) | 2011-08-24 | 2011-08-24 | Non-contact charger capable of automatic tracking of resonant frequency of switch power circuit |
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| CN103516354A (en) * | 2013-10-23 | 2014-01-15 | 江南大学 | Electromagnetism resonance type wireless electric energy transmission lock phase frequency tracking circuit |
| CN103779951A (en) * | 2014-01-03 | 2014-05-07 | 无锡市产品质量监督检验中心 | Electric bicycle magnetic coupling resonance type wireless charger |
| CN104079076A (en) * | 2013-03-29 | 2014-10-01 | 河南工程学院 | Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof |
| 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 |
| CN105052008A (en) * | 2013-03-18 | 2015-11-11 | 株式会社Ihi | Power supply apparatus and non-contact power supply system |
| CN105981279A (en) * | 2014-03-13 | 2016-09-28 | 欧姆龙株式会社 | Current resonant type dc voltage converter, control integrated circuit, and current resonant type dc voltage conversion method |
| CN106655845A (en) * | 2017-03-13 | 2017-05-10 | 中惠创智（深圳）无线供电技术有限公司 | Series resonant circuit and power supply |
| CN107342688A (en) * | 2016-04-29 | 2017-11-10 | 华为技术有限公司 | A kind of resonant power converter and its frequency tracking method |
| CN110563100A (en) * | 2019-10-15 | 2019-12-13 | 上海万森水处理有限公司 | Scale inhibition and scale removal device and method based on random pulse sequence alternating electromagnetic field |
| CN116807567A (en) * | 2023-08-29 | 2023-09-29 | 深圳臣诺医疗器械有限公司 | Ultrasonic knife shearing control system and method adaptive to different tissues of human body |
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2011
- 2011-08-24 CN CN2011203119419U patent/CN202231500U/en not_active Expired - Fee Related
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| CN105052008A (en) * | 2013-03-18 | 2015-11-11 | 株式会社Ihi | Power supply apparatus and non-contact power supply system |
| US10298063B2 (en) | 2013-03-18 | 2019-05-21 | Ihi Corporation | Power-supplying device and wireless power supply system |
| CN105052008B (en) * | 2013-03-18 | 2018-08-24 | 株式会社Ihi | For electric installation and contactless power supply system |
| CN104079076A (en) * | 2013-03-29 | 2014-10-01 | 河南工程学院 | Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof |
| 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 |
| CN103516354A (en) * | 2013-10-23 | 2014-01-15 | 江南大学 | Electromagnetism resonance type wireless electric energy transmission lock phase frequency tracking circuit |
| CN103516354B (en) * | 2013-10-23 | 2016-02-10 | 江南大学 | Electromagentic resonance formula wireless power transmission frequency of phase locking tracking circuit |
| CN103779951A (en) * | 2014-01-03 | 2014-05-07 | 无锡市产品质量监督检验中心 | Electric bicycle magnetic coupling resonance type wireless charger |
| CN103779951B (en) * | 2014-01-03 | 2015-12-30 | 无锡市产品质量监督检验中心 | Electric bicycle magnet coupled resonant type wireless charger |
| EP3118983A4 (en) * | 2014-03-13 | 2017-11-22 | Omron Corporation | Current resonant type dc voltage converter, control integrated circuit, and current resonant type dc voltage conversion method |
| CN105981279B (en) * | 2014-03-13 | 2018-06-12 | 欧姆龙株式会社 | Current resonance type dc voltage changer, control integrated circuit and current resonance type DC voltage transforming method |
| US10079545B2 (en) | 2014-03-13 | 2018-09-18 | Omron Corporation | Current resonant type DC voltage converter, control integrated circuit, and current resonant type DC voltage conversion method |
| CN105981279A (en) * | 2014-03-13 | 2016-09-28 | 欧姆龙株式会社 | Current resonant type dc voltage converter, control integrated circuit, and current resonant type dc voltage conversion method |
| CN107342688A (en) * | 2016-04-29 | 2017-11-10 | 华为技术有限公司 | A kind of resonant power converter and its frequency tracking method |
| US10439501B2 (en) | 2016-04-29 | 2019-10-08 | Huawei Technologies Co., Ltd. | Resonant power converter and frequency tracking method for resonant power converter |
| CN107342688B (en) * | 2016-04-29 | 2020-01-17 | 华为技术有限公司 | Resonant power converter and frequency tracking method thereof |
| CN106655845A (en) * | 2017-03-13 | 2017-05-10 | 中惠创智（深圳）无线供电技术有限公司 | Series resonant circuit and power supply |
| CN110563100A (en) * | 2019-10-15 | 2019-12-13 | 上海万森水处理有限公司 | Scale inhibition and scale removal device and method based on random pulse sequence alternating electromagnetic field |
| CN110563100B (en) * | 2019-10-15 | 2023-10-27 | 上海万森低碳科技有限公司 | Scale inhibition and removal device and method based on random pulse sequence alternating electromagnetic field |
| CN116807567A (en) * | 2023-08-29 | 2023-09-29 | 深圳臣诺医疗器械有限公司 | Ultrasonic knife shearing control system and method adaptive to different tissues of human body |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20140824 |
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| EXPY | Termination of patent right or utility model |