CN104052291A - Methods And Systems For Calibrating A Resonant Converter - Google Patents
Methods And Systems For Calibrating A Resonant Converter Download PDFInfo
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- CN104052291A CN104052291A CN201410096700.5A CN201410096700A CN104052291A CN 104052291 A CN104052291 A CN 104052291A CN 201410096700 A CN201410096700 A CN 201410096700A CN 104052291 A CN104052291 A CN 104052291A
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- resonance converter
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- input voltage
- voltage
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Abstract
Methods and systems for calibrating an inductor-inductor-capacitor (LLC) resonant converter (100) are provided herein. The method includes calculating input voltage mathematically as a function of at least one of an output voltage, a load current, and tolerances of components of the LLC resonant converter and operating the LLC resonant converter in an open loop mode at a nominal resonant frequency. The method also includes measuring output voltage of the LLC resonant converter and comparing the measured output voltage to the calculated input voltage.
Description
The cross reference of related application
The application requires the priority of the U.S. Provisional Patent Application number 61/793,763 of submitting on March 15th, 2013, by reference to its entirety being incorporated to herein.
Background technology
The art relates generally to power converter, more specifically, relates to the method and system of calibrating resonance converter.
Adopt the current design real example method of inductance-inductor-capacitor (LLC) resonance converter topological structure to determine the input voltage requiring in output stage, with all tolerances in adaptive circuit.For example, tolerance can comprise the variation of the +/-5% in variation and/or the capacitance of the +/-5% to 8% in resonant inductance value.Because real example method is used the poorest case conditions, so the method does not realize high efficiency under all loading conditions and all output voltages.Known method is used look-up table or closes circulation (close-a-loop) resonance frequency.
Summary of the invention
In one embodiment, provide a kind of method of calibrating resonance converter.The method comprises: on mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and LLC transducer; And operate LLC transducer with nominal resonance frequency under open loop mode.The method also comprises: the output voltage of measuring LLC transducer; And the input voltage of the output voltage comparing and measuring and calculating.
In another embodiment, provide a kind of inductance-inductor-capacitor (LLC) resonance converter.This transducer comprises inverter, resonant tank and is coupled to inverter and the controller of resonant tank.Controller is configured to: on mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and LLC transducer; And operate LLC transducer with nominal resonance frequency under open loop mode.Controller is also configured to: the output voltage of measuring LLC transducer; And the voltage of the output voltage comparing and measuring and calculating.
According to first aspect of the present disclosure, a kind of method of calibration inductance-inductor-capacitor (LLC) resonance converter is provided, described method comprises:
On mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and described LLC resonance converter;
Under open loop mode, operate described LLC resonance converter with nominal resonance frequency;
Measure the output voltage of described LLC resonance converter; And
More measured output voltage and the input voltage calculating.
According to the method for first aspect, wherein, under open loop mode, operate described LLC resonance converter and comprise with predefined load and operating.
According to the method for first aspect, wherein, under open loop mode, operate described LLC resonance converter and comprise with predefined input voltage and operating.
According to the method for first aspect, wherein, on mathematics, calculate input voltage and comprise: according to
v bus =
v out ×
n t ×
m+
i out ×
f×
y±
xcalculate input voltage, wherein, V
outthe output voltage of described LLC resonance converter, N
tbe the turn ratio of transformer, M is multiplier, I
outbe the real-time output current of described LLC resonance converter, f is incoming frequency, and y is the coefficient of representative across the ripple of 400V bus, and x is the calibration factor that can obtain at test period.
According to the method for first aspect, wherein, described LLC resonance converter comprises half bridge rectifier, and described method also comprises calculates input voltage to described multiplier M 2 value.
According to the method for first aspect, wherein, described LLC resonance converter comprises full-bridge rectifier, and described method also comprises calculates input voltage to described multiplier M 1 value.
According to the method for first aspect, wherein, when measured output voltage is during lower than calculated input voltage, described method comprises x application negative value.
According to the method for first aspect, also comprise the size of the described voltage of definite function as the difference between input voltage measured and that calculate.
According to the method for first aspect, wherein, when measured output voltage is during higher than calculated input voltage, described method also comprise to x application on the occasion of.
According to the method for first aspect, also comprise the size of the described voltage of definite function as the difference between input voltage measured and that calculate.
According to second aspect of the present disclosure, a kind of inductance-inductor-capacitor (LLC) resonance converter is provided, comprising:
Inverter;
Resonant tank; And
Controller, is coupled to described inverter and described resonant tank, and described controller is configured to:
On mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and described LLC transducer;
Under open loop mode, operate described LLC resonance converter with nominal resonance frequency;
Measure the output voltage of described LLC resonance converter; And
More measured output voltage and the voltage calculating.
According to the LLC resonance converter of second aspect, wherein, described controller is also configured to operate with at least one in predefined load and predefined voltage.
According to the LLC resonance converter of second aspect, wherein, in order to calculate input voltage on mathematics, described controller is also configured to basis
v bus =
v out ×
n t ×
m+
i out ×
f×
y±
xcalculate input voltage.
According to the LLC resonance converter of second aspect, wherein, V
outthe output voltage of described LLC resonance converter, N
tbe the turn ratio of transformer, M is multiplier, I
outbe the real-time output current of described LLC resonance converter, f is incoming frequency, and y is the coefficient of representative across the ripple of 400V bus, and x is the calibration factor that can obtain at test period.
According to the LLC resonance converter of second aspect, also comprise half bridge rectifier, described controller is also configured to the value to M application 2.
According to the LLC resonance converter of second aspect, also comprise full-bridge rectifier, described controller is also configured to the value to M application 1.
According to the LLC resonance converter of second aspect, wherein, when measured output voltage is during lower than calculated voltage, described method comprises x application negative value.
According to the LLC resonance converter of second aspect, wherein, when measured output voltage is during higher than calculated voltage, described method comprise to x application on the occasion of.
According to the LLC resonance converter of second aspect, wherein, described resonant tank comprises resonant inductance and resonant capacitance.
Brief description of the drawings
Fig. 1 is the circuit diagram of conventional LLC series resonant converter;
Fig. 2 is the chart illustrating for the gain curve of the LLC power converter shown in Fig. 1;
Fig. 3 is the chart that look-up table is shown and is applied to the efficiency comparison between the demonstration equation of the rectifier with near the loopback value (tank value) nominal;
Fig. 4 is the chart that look-up table is shown and is applied to the efficiency comparison between the demonstration equation of the rectifier with the loop element at the low side of range of tolerable variance (tank element).
Embodiment
Fig. 1 is the circuit diagram of inductance-inductor-capacitor (LLC) series resonant converter 100, and this series resonant converter 100 is for by input voltage V
gbe converted to the different voltage V of its output
o.In example embodiment, transducer 100 comprises inverter 102, LLC series resonant tank 104 and rectifier 106.Inverter 102 is half-bridge inverters, and comprises the first switch (M
p) 110 and second switch (M
n) 112.Switch 110 and 112 is by complementary drive, with the input V at resonant tank (resonant tank) 104
inproduce square wave.Inductance (the L that resonant tank 104 comprises series coupled
s) 114, series capacitor (C
s) 116 and resonant inductance (L
p) 118, to realize resonance.Resonant inductance 118 and load parallel coupled.
In example embodiment, rectifier 106 comprises centre-tapped transformer 120, filter capacitor (C
f) 122, the first rectifier diode (D
p) 124 and the second rectifier diode (D
n) 126.The rectifier 106 AC waveform rectification in self-resonance loop 104 is in the future DC output.Rectifier 106 can be half bridge rectifier, full-bridge rectifier or can make rectifier 106 bring into play like that as described in this article the rectifier of any other type of function.In low output voltage, the application of high electric current, the first and second rectifier diodes 124 and 126 are replaced by synchronous rectifier (not shown), to reduce the voltage drop (conduction loss) across each semiconductor rectifier.
In example embodiment, LLC transducer 100 also comprises the controller 108 that can be coupled to communicatedly inverter 102, resonant tank 104 and/or rectifier 106.Controller 108 is configured to carry out one or more operations of transducer 100, as further illustrated herein.For example, controller 108 use mathematical expressions are calculated best bus voltage, and described bus voltage is as the function of the tolerance of the element (being resonant inductance 118 and resonant capacitance 116) in output voltage, load current, incoming frequency and/or LLC loop 104.This is convenient to each element and operates under peak efficiencies, and can not reduce other performances such as noise meter noise (psophometric noise).Mathematical expression provides as follows:
V bus =
V out ×
N t ×
M＋
I out ×
f×
y±
x （1）
" V
out" be the output voltage of LLC transducer 100." N
t" be the turn ratio of transformer 120." M " is multiplier, for the value of half bridge rectifier application 2, and applies 1 value for full-bridge rectifier." I
out" be the real-time output current of LLC transducer 100." f " is incoming frequency, and " y " is the coefficient of representative across the ripple of 400V bus, and " x " is the calibration factor that can obtain at test period.
In example embodiment, by complete calibration with nominal resonance frequency operation LLC transducer 100 under open loop mode.Can also, by with predefined load or with predefined input voltage operation LLC transducer 100, complete and under open loop mode, operate LLC transducer 100.At this test period, measure output voltage V
o, and with expect nominal value comparison.If the output voltage V of measuring
olower than desired value, can infer that so particular loop has lower resonance frequency, therefore coefficient x is by Ju You – v
esymbol, and size is the function of measured value to the difference between desired value.Or, if the voltage of measuring is higher than desired, this means that the resonance frequency of this unit is higher than nominal, and will have+v of coefficient x
esymbol.Size is the function of measured value to the difference between desired value.
Fig. 2 is the chart illustrating for the gain curve of (shown in Fig. 1) LLC power converter 100.Gain curve is corresponding to the normalization DC output voltage of LLC power converter 100, and comprises the first normalized gain curve 200, the second normalized gain curve 205 and the 3rd normalization gain curve 210.In example embodiment, resonant inductance has the variation of +/-8%, and resonant capacitance has the variation of +/-5%.As shown in Figure 2, nominal resonance frequency is approximately 186kHz, and nominal output voltage is between 1V and 1.02V.
Fig. 3 is the chart that the efficiency comparison between the system that uses the system of look-up table and use the above-mentioned equation (1) that is applied to the rectifier with near the loopback value of nominal is shown.The first curve 300 determines that with using equation (1) efficiency of LLC transducer of voltage is associated.The second curve 305 and the system relationship of determining voltage with look-up table.In example embodiment, equation (1) is applied to having near the rectifier of the loopback value of nominal.As shown in Figure 3, compared with using the curve 305 of look-up table, the curve 300 that represents equation (1) spreads all over almost whole opereating specification and realizes more high efficiency.
Fig. 4 is the chart that look-up table is shown and has the efficiency comparison between the equation (1) of the rectifier of the loop element of the low side of range of tolerable variance.The first curve 400 determines that with using equation (1) efficiency of LLC transducer of voltage is associated.The second curve 405 and the system relationship of determining voltage with look-up table.As shown in Figure 4, compared with using the curve 405 of look-up table, the curve 400 that represents equation (1) spreads all over all whole opereating specifications substantially and realizes more high efficiency.
The embodiment of explanation provides a kind of controller herein, realizes the mathematical method of calculating best bus voltage, and this bus voltage is the function of the tolerance of output voltage, load current, incoming frequency and LLC loop element (being resonant inductance and resonant capacitance).Embodiment can make each element operate under peak efficiencies, and can not reduce other performances such as noise meter noise.In addition, the coefficient that embodiment provides a kind of process to obtain the tolerance for compensating LLC resonance converter, and without measuring circuit frequency.
This written explanation uses the example that comprises preference pattern to disclose the present invention, can make in addition any technical staff of this area that the present invention is tried out, and comprises the method for manufacturing and using any equipment or system and carry out any combination.The scope of patentability of the present invention is defined by claim, and can comprise thinkable other examples of those skilled in the art.If these other examples have the inscape of the literal language that is not different from claim, if or it comprises the inscape of equal value with the literal language of claim with non-essence difference, these other examples expections fall in the scope of claim so.
Term controller used herein can refer to electronic controller, and it can comprise computer processor or treatment facility (not shown).Processor be generally can process information any hardware, described information is all such as, if any (being generally " computer program ", software, firmware etc.) and/or other suitable electronic information such as such as data, computer readable program code, instructions.For example, processor can be configured to computer program or order, and it can be stored in plate borne processor, or can be stored in addition in associated memory (not shown).In another example, processor can be embodied as or comprise in addition one or more application-specific integrated circuit (ASIC)s (ASIC), field programmable gate array (FPGA) etc.Therefore, although processor can computer program be carried out one or more functions, the processor of various examples can be carried out one or more functions, and without the assistance of computer program.Electronics used herein or computer storage are generally any hardware of the information of can storing, data, computer program and/or other suitable information of described information such as occasional nature or permanent nature.In one example, memory can be configured to storing various information in one or more databases.Memory can comprise volatibility and/or nonvolatile memory, can be fix or movably.The example of suitable memory comprises random-access memory (ram), read-only memory (ROM), hard disk drive, flash memories, thumb actuator, removable computer diskette, CD, tape or some above-mentioned combinations.CD can comprise compact disk read-only memory (CDROM), compact disc read memory write (CD-R/W), digital video disk storage (DVD) etc.In various examples, memory can be called as computer-readable recording medium, it can be different from all if information is carried into the computer-readable transmission medium of another the temporary signal of electronics from a position as the non-provisional equipment that can store information.The computer-readable medium of explanation generally can refer to computer-readable recording medium or computer-readable transmission medium herein.
Claims (10)
1. a method for calibration inductance-inductor-capacitor (LLC) resonance converter (100), described method comprises:
On mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and described LLC resonance converter;
Under open loop mode, operate described LLC resonance converter with nominal resonance frequency;
Measure the output voltage of described LLC resonance converter; And
More measured output voltage and the input voltage calculating.
2. the method for claim 1, wherein calculating input voltage on mathematics comprises: according to
v bus =
v out ×
n t ×
m+
i out ×
f×
y±
xcalculate input voltage, wherein, V
outthe output voltage of described LLC resonance converter (100), N
tbe the turn ratio of transformer (120), M is multiplier, I
outbe the real-time output current of described LLC transducer, f is incoming frequency, and y is the coefficient of representative across the ripple of 400V bus, and x is the calibration factor that can obtain at test period.
3. method as claimed in claim 2, wherein, described LLC resonance converter (100) comprises half bridge rectifier (106), and described method also comprises calculates input voltage to described multiplier M 2 value.
4. method as claimed in claim 2, wherein, described LLC resonance converter (100) comprises full-bridge rectifier (106), and described method also comprises calculates input voltage to described multiplier M 1 value.
5. method as claimed in claim 2, wherein, when measured output voltage is during lower than calculated input voltage, described method comprises x application negative value.
6. method as claimed in claim 2, wherein, when measured output voltage is during higher than calculated input voltage, described method also comprise to x application on the occasion of.
7. an inductance-inductor-capacitor (LLC) resonance converter (100), comprising:
Inverter (102);
Resonant tank (104); And
Controller (108), is coupled to described inverter and described resonant tank, and described controller is configured to:
On mathematics, calculate as at least one the input voltage of function in the tolerance of the assembly of output voltage, load current and described LLC resonance converter;
Under open loop mode, operate described LLC resonance converter with nominal resonance frequency;
Measure the output voltage of described LLC resonance converter; And
More measured output voltage and the voltage calculating.
8. LLC resonance converter as claimed in claim 7, wherein, described controller (108) is also configured to operate with at least one in predefined load and predefined voltage.
9. LLC resonance converter as claimed in claim 7, wherein, in order to calculate input voltage on mathematics, described controller (108) is also configured to basis
v bus =
v out ×
n t ×
m+
i out ×
f×
y±
xcalculate input voltage, wherein, V
outthe output voltage of described LLC transducer (100), N
tbe the turn ratio of transformer (120), M is multiplier, I
outbe the real-time output current of described LLC transducer, f is incoming frequency, and y is the coefficient of representative across the ripple of 400V bus, and x is the calibration factor that can obtain at test period.
10. LLC resonance converter as claimed in claim 7, wherein, described resonant tank (104) comprises resonant inductance (118) and resonant capacitance (116).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361793763P | 2013-03-15 | 2013-03-15 | |
| US61/793763 | 2013-03-15 | ||
| US14/189,154 US9548670B2 (en) | 2013-03-15 | 2014-02-25 | Methods and systems for calibrating a resonant converter |
| US14/189154 | 2014-02-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104052291A true CN104052291A (en) | 2014-09-17 |
| CN104052291B CN104052291B (en) | 2019-11-15 |
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ID=51504772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410096700.5A Active CN104052291B (en) | 2013-03-15 | 2014-03-17 | For calibrating the method and system of resonance converter |
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| Country | Link |
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| CN (1) | CN104052291B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107229028A (en) * | 2016-03-24 | 2017-10-03 | 大陆汽车有限公司 | Method and battery sensor for determining load current |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570276A (en) * | 1993-11-15 | 1996-10-29 | Optimun Power Conversion, Inc. | Switching converter with open-loop input voltage regulation on primary side and closed-loop load regulation on secondary side |
| US20090244934A1 (en) * | 2008-03-28 | 2009-10-01 | Delta Electronics Inc. | Synchronous rectification circuit having burst mode controller and controlling method thereof |
| WO2011102910A1 (en) * | 2010-02-22 | 2011-08-25 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
| US20120275197A1 (en) * | 2009-02-27 | 2012-11-01 | Delta Electronics (Shanghai) Co., Ltd. | Layouts of multiple transformers and multiple rectifiers of interleaving converter |
-
2014
- 2014-03-17 CN CN201410096700.5A patent/CN104052291B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5570276A (en) * | 1993-11-15 | 1996-10-29 | Optimun Power Conversion, Inc. | Switching converter with open-loop input voltage regulation on primary side and closed-loop load regulation on secondary side |
| US20090244934A1 (en) * | 2008-03-28 | 2009-10-01 | Delta Electronics Inc. | Synchronous rectification circuit having burst mode controller and controlling method thereof |
| US20120275197A1 (en) * | 2009-02-27 | 2012-11-01 | Delta Electronics (Shanghai) Co., Ltd. | Layouts of multiple transformers and multiple rectifiers of interleaving converter |
| WO2011102910A1 (en) * | 2010-02-22 | 2011-08-25 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107229028A (en) * | 2016-03-24 | 2017-10-03 | 大陆汽车有限公司 | Method and battery sensor for determining load current |
| CN107229028B (en) * | 2016-03-24 | 2020-01-21 | 大陆汽车有限公司 | Method and battery sensor for determining a load current |
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|---|---|
| CN104052291B (en) | 2019-11-15 |
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