CN102570839A - LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance - Google Patents
LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance Download PDFInfo
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- CN102570839A CN102570839A CN2010105916497A CN201010591649A CN102570839A CN 102570839 A CN102570839 A CN 102570839A CN 2010105916497 A CN2010105916497 A CN 2010105916497A CN 201010591649 A CN201010591649 A CN 201010591649A CN 102570839 A CN102570839 A CN 102570839A
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- power supply
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- llc resonant
- voltage
- current sensor
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to an LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance. The LLC resonant DC-DC power supply comprises an input circuit, an electronic switch, an LLC resonant circuit, a high-frequency transformer circuit and an output circuit; the LLC resonant circuit comprises a first inductance coil, a first capacitor and a second inductance coil, as well as a voltage/current sensor circuit and a programmable single chip computer; the voltage/current sensor circuit comprises a voltage sensor and a current sensor; the LLC resonant circuit also comprises a second VMOS (Vertical Metal Oxide Semiconductor) tube and a second capacitor; and the second VMOS tube and the second capacitor are serially connected and then connected on two ends of the first capacitor in parallel. Through the invention, the technical problem of incapability of the adjustment of resonance frequency according to the change of a load of the power supply in the traditional power supply for a vehicle is solved. Through the invention, the system is provided with two resonance points, then the power supply can work under different resonance frequencies in different loads and the frequency of the system during the adjustment deviates a little from the resonance points, so that the work efficiency of the DC-DC power supply is improved.
Description
Technical field
The present invention relates to the automobile-used DC-DC conversion electric power of a kind of LLC mode of resonance.
Background technology
Domestic common vehicle LLC resonant type DC-DC power supply is a method of under the prerequisite of fixing 50% duty ratio, using adjustment LLC resonant circuit frequency of oscillation off-resonance point at present, adjusts output voltage and electric current.When working by day, vehicle do not work because of lighting system; Have only system works such as fuel pump and oil atomizer system, vehicle controlling computer and various kinds of sensors system, boost pump system, door glass, rain brush, changes in temperature wind; Power demand is about 200W, and power demand increases to about 800W when night, lighting system was worked.The relative more stable situation so the load variations of the unresolved power supply on vehicle of this method is big is so power-supply system can't always work in best operating efficiency zone.
Summary of the invention
The object of the invention provides the LLC resonant type DC-DC power supply that a kind of monolithic processor controlled change electric capacity changes resonance frequency, and it has solved the technical problem that existing automobile-used DC-DC power supply can't be adjusted the LLC resonance frequency according to the needs that power source loads changes.
Technical solution of the present invention is:
A kind ofly change the LLC resonant type DC-DC power supply that electric capacity changes resonance frequency, comprise input circuit, electronic switch K1, LLC resonant circuit, high frequency transformer circuit T and output circuit; Said LLC resonant circuit comprises the first inductance coil L1, the first capacitor C r and the second inductance coil L2;
Its special character is:
Also comprise voltage-current sensor circuit and programmable single chip computer S; Said voltage-current sensor circuit comprises voltage sensor A and current sensor B,
Said LLC resonant circuit also comprises the 2nd VMOS pipe K2 and second capacitor C 2 that is attempted by the first capacitor C r two ends after the series connection; And the source electrode that the drain electrode of the 2nd VMOS pipe K2 meets second capacitor C, 2, the two VMOS pipe K2 meets the first inductance coil L1;
The output of said voltage sensor A and current sensor B inserts programmable single chip computer S respectively, and said programmable single chip computer S can be according to a voltage and current signal resonance control signal of output and electronic switch control signal of voltage sensor A and current sensor B;
The resonance control signal of the output of said programmable single chip computer S is sent into the grid of the 2nd VMOS pipe K2;
The electronic switch control signal of said programmable single chip computer S is sent into electronic switch K1.
Above-mentioned electronic switch K1 is the VMOS switching tube.
The advantage that the present invention has is:
1, because the electric current of vehicle DC-DC power source loads system when working by day is more stable, and the electric current when working at night is also big than steady change, but the amplitude of variation between two electric currents is bigger.Power supply of the present invention is according to the above characteristics of bearing power state; With Single-chip Controlling numerical control switch (VMOS pipe) and electronic switch; Change the appearance value of electric capacity, the system that makes has two resonance points, makes the LLC circuit of power source loads power supply under the situation of underloading and heavy duty under different resonant, work; Frequency off-resonance point is very little when making system's adjustment, thereby improves DC-DC power work efficient.
2, the present invention can select energy saver mode work when system load is low.Improved the high efficiency of system.
3, power supply of the present invention assembling back all hardware, simple in structure, need not debugging, good reliability, be fit to mass industrialized production.
4, power supply of the present invention adopts digital circuit, and the antijamming capability of system is strong, is convenient to maintenance.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the circuit theory diagrams of LLC resonant circuit of the present invention.
Embodiment
Change the LLC resonant type DC-DC power supply that electric capacity changes resonance frequency, comprise programmable single chip computer S and the input circuit that connects successively, direct current become electronic switch K1, LLC resonant circuit, high frequency transformer circuit T, voltage-current sensor circuit, programmable single chip computer S and the output circuit of pulsating direct current; The LLC resonant circuit comprises the first inductance coil L1, the first capacitor C r, second capacitor C 2 and the second inductance coil L2; Be attempted by the first capacitor C r two ends after the 2nd VMOS pipe K2 and 2 series connection of second capacitor C, and the source electrode that the drain electrode of the 2nd VMOS pipe K2 meets second capacitor C, 2, the two VMOS pipe K2 meets the first inductance coil L1; The voltage-current sensor circuit comprises voltage sensor A and current sensor B; The output of voltage sensor A and current sensor B inserts programmable single chip computer S respectively, and programmable single chip computer S can be according to a voltage and current signal resonance control signal of output and electronic switch control signal of voltage sensor A and current sensor B; The resonance control signal of the output of programmable single chip computer S is sent into the grid of the 2nd VMOS pipe K2; Electronic switch K1 is the VMOS switching tube.The electronic switch control signal of programmable single chip computer S is sent into the grid of electronic switch K1.
Claims (2)
1. one kind changes the LLC resonant type DC-DC power supply that electric capacity changes resonance frequency, comprises input circuit, electronic switch (K1), LLC resonant circuit, high frequency transformer circuit (T) and output circuit; Said LLC resonant circuit comprises first inductance coil (L1), first electric capacity (Cr) and second inductance coil (L2);
It is characterized in that:
Also comprise voltage-current sensor circuit and programmable single chip computer (S); Said voltage-current sensor circuit comprises voltage sensor (A) and current sensor (B),
Said LLC resonant circuit also comprises the 2nd VMOS pipe (K2) and second electric capacity (C2) that is attempted by first electric capacity (Cr) two ends after the series connection; And the drain electrode of the 2nd VMOS pipe (K2) connects second electric capacity (C2), and the source electrode of the 2nd VMOS pipe (K2) connects first inductance coil (L1);
The output of said voltage sensor (A) and current sensor (B) inserts programmable single chip computer (S) respectively, and said programmable single chip computer (S) can be according to a voltage and current signal resonance control signal of output and electronic switch control signal of voltage sensor (A) and current sensor (B);
The resonance control signal of the output of said programmable single chip computer (S) is sent into the grid of the 2nd VMOS pipe (K2);
The electronic switch control signal of said programmable single chip computer (S) is sent into electronic switch (K1).
2. change electric capacity according to claim 1 changes the LLC resonant type DC-DC power supply of resonance frequency, it is characterized in that: said electronic switch (K1) is the VMOS switching tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105916497A CN102570839A (en) | 2010-12-16 | 2010-12-16 | LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105916497A CN102570839A (en) | 2010-12-16 | 2010-12-16 | LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102570839A true CN102570839A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105916497A Pending CN102570839A (en) | 2010-12-16 | 2010-12-16 | LLC (inductor-inductor-capacitance) resonant DC-DC (Direct Current-Direct Current) power supply capable of changing resonance frequency by changing capacitance |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441684A (en) * | 2013-09-13 | 2013-12-11 | 刘闯 | Fluctuating electric energy recycled high-accuracy DC/DC (direct current/direct current) converter |
| CN103475232A (en) * | 2013-09-30 | 2013-12-25 | 刘闯 | High-precision bidirectional converter for electric energy storage and circulation |
| CN103701331A (en) * | 2013-12-24 | 2014-04-02 | 深圳市开立科技有限公司 | LLC (Logical Link Control) resonant wide-voltage-range output high-efficiency power supply with variable resonant frequency |
| CN105576977A (en) * | 2014-10-09 | 2016-05-11 | 通用电气公司 | Circuit and method for resonant network |
| CN112953238A (en) * | 2021-02-25 | 2021-06-11 | 杭州优特电源有限公司 | Resonant soft switching converter |
| WO2022080253A1 (en) * | 2020-10-12 | 2022-04-21 | 株式会社村田製作所 | Variable electronic element and circuit device |
-
2010
- 2010-12-16 CN CN2010105916497A patent/CN102570839A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441684A (en) * | 2013-09-13 | 2013-12-11 | 刘闯 | Fluctuating electric energy recycled high-accuracy DC/DC (direct current/direct current) converter |
| CN103441684B (en) * | 2013-09-13 | 2017-06-06 | 刘闯 | Fluctuate electric recoverable high accuracy DC/DC converters |
| CN103475232A (en) * | 2013-09-30 | 2013-12-25 | 刘闯 | High-precision bidirectional converter for electric energy storage and circulation |
| CN103701331A (en) * | 2013-12-24 | 2014-04-02 | 深圳市开立科技有限公司 | LLC (Logical Link Control) resonant wide-voltage-range output high-efficiency power supply with variable resonant frequency |
| CN103701331B (en) * | 2013-12-24 | 2016-08-17 | 深圳开立生物医疗科技股份有限公司 | The LLC mode of resonance wide-voltage range output high-efficiency power of resonant frequency can be changed |
| CN105576977A (en) * | 2014-10-09 | 2016-05-11 | 通用电气公司 | Circuit and method for resonant network |
| WO2022080253A1 (en) * | 2020-10-12 | 2022-04-21 | 株式会社村田製作所 | Variable electronic element and circuit device |
| CN112953238A (en) * | 2021-02-25 | 2021-06-11 | 杭州优特电源有限公司 | Resonant soft switching converter |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |