CN104052291B - For calibrating the method and system of resonance converter - Google Patents
For calibrating the method and system of resonance converter Download PDFInfo
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- CN104052291B CN104052291B CN201410096700.5A CN201410096700A CN104052291B CN 104052291 B CN104052291 B CN 104052291B CN 201410096700 A CN201410096700 A CN 201410096700A CN 104052291 B CN104052291 B CN 104052291B
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Abstract
Provided herein is a kind of for calibrating the method and system of Inductivity-Inductivity-capacitor (LLC) resonance converter (100).This method includes: mathematically calculating the input voltage of the function of at least one of tolerance of component as output voltage, load current and LLC resonance converter；And LLC resonance converter is operated with nominal resonance frequency in an open loop mode.This method also includes: the output voltage of measurement LLC resonance converter；And compare the output voltage of measurement and the input voltage of calculating.
Description
Cross reference to related applications
This application claims the priority for the U.S. Provisional Patent Application No. 61/793,763 that on March 15th, 2013 submits, and lead to
It crosses to refer to and be integrally incorporated herein.
Background technique
The art relates generally to power converter, more specifically, is related to calibrating the method for resonance converter and is
System.
Real example is used using the current design of Inductivity-Inductivity-capacitor (LLC) resonance converter topological structure in output stage
Method determines the input voltage of requirement, with all tolerances in adaptive circuit.For example, tolerance may include in resonant inductance value
+/- 5% to 8% variation, and/or capacitance in +/- 5% variation.Because empirical analysis uses worst situation item
Part does not realize high efficiency under all loading conditions and all output voltages in this way.Known method is to resonance frequency
Rate is using look-up table or closes circulation (close-a-loop).
Summary of the invention
In one embodiment, a kind of method for calibrating resonance converter is provided.This method includes: mathematically calculating conduct
The input voltage of the function of at least one of the tolerance of component of output voltage, load current and LLC converter；And
LLC converter is operated with nominal resonance frequency under open loop mode.This method also includes: measuring the output voltage of LLC converter；With
And compare the output voltage of measurement and the input voltage of calculating.
In another embodiment, a kind of Inductivity-Inductivity-capacitor (LLC) resonance converter is provided.The converter includes
Inverter, resonant tank and the controller for being coupled to inverter and resonant tank.Controller, which is configured that mathematically to calculate, to be made
The input voltage of the function of at least one of the tolerance of component for output voltage, load current and LLC converter；And
LLC converter is operated with nominal resonance frequency in an open loop mode.Controller is additionally configured to: measuring the output electricity of LLC converter
Pressure；And compare the output voltage of measurement and the voltage of calculating.
According to the disclosure in a first aspect, providing a kind of side for calibrating Inductivity-Inductivity-capacitor (LLC) resonance converter
Method, which comprises
It mathematically calculates in the tolerance as the component of output voltage, load current and the LLC resonance converter
The input voltage of the function of at least one；
The LLC resonance converter is operated with nominal resonance frequency in an open loop mode；
Measure the output voltage of the LLC resonance converter；And
Compare measured output voltage and input voltage calculated.
According to the method for first aspect, wherein operating the LLC resonance converter in an open loop mode includes with predefined
Load operate.
According to the method for first aspect, wherein operating the LLC resonance converter in an open loop mode includes with predefined
Input voltage operate.
According to the method for first aspect, wherein mathematically calculating input voltage includes: according to Vbus=Vout×Nt×M+
Iout× f × y ± x calculates input voltage, wherein VoutIt is the output voltage of the LLC resonance converter, NtIt is transformer
Turn ratio, M are multiplier, IoutIt is the real-time output electric current of the LLC resonance converter, f is input frequency, and y is represented across 400V
The coefficient of the ripple of bus, x are the calibration factors that can be obtained dduring test.
According to the method for first aspect, wherein the LLC resonance converter includes half bridge rectifier, and the method is also wrapped
It includes and input voltage is calculated using 2 value to the multiplier M.
According to the method for first aspect, wherein the LLC resonance converter includes full-bridge rectifier, and the method is also wrapped
It includes and input voltage is calculated using 1 value to the multiplier M.
According to the method for first aspect, wherein described when measured output voltage is lower than input voltage calculated
Method includes to x application negative value.
It further include the difference being determined as between input voltage measured and calculated according to the method for first aspect
The size of the voltage of function.
According to the method for first aspect, wherein described when measured output voltage is higher than input voltage calculated
Method further includes to x application positive value.
It further include the difference being determined as between input voltage measured and calculated according to the method for first aspect
The size of the voltage of function.
According to the second aspect of the disclosure, a kind of Inductivity-Inductivity-capacitor (LLC) resonance converter is provided, comprising:
Inverter；
Resonant tank；And
Controller, is coupled to the inverter and the resonant tank, and the controller is configured that
Mathematically calculate as in the tolerance of the component of output voltage, load current and the LLC converter at least
The input voltage of one function；
The LLC resonance converter is operated with nominal resonance frequency in an open loop mode；
Measure the output voltage of the LLC resonance converter；And
Compare measured output voltage and voltage calculated.
According to the LLC resonance converter of second aspect, wherein the controller is additionally configured to predefined load and pre-
At least one of voltage of definition operates.
According to the LLC resonance converter of second aspect, wherein in order to mathematically calculate input voltage, the controller is also
It is configured to according to Vbus=Vout×Nt×M+Iout× f × y ± x calculates input voltage.
According to the LLC resonance converter of second aspect, wherein VoutIt is the output voltage of the LLC resonance converter, Nt
It is the turn ratio of transformer, M is multiplier, IoutIt is the real-time output electric current of the LLC resonance converter, f is input frequency, and y is
The coefficient of the ripple across 400V bus is represented, x is the calibration factor that can be obtained dduring test.
It further include half bridge rectifier according to the LLC resonance converter of second aspect, the controller is additionally configured to answer M
With 2 value.
It further include full-bridge rectifier according to the LLC resonance converter of second aspect, the controller is additionally configured to answer M
With 1 value.
According to the LLC resonance converter of second aspect, wherein when measured output voltage is lower than voltage calculated
When, the method includes to x application negative value.
According to the LLC resonance converter of second aspect, wherein when measured output voltage is higher than voltage calculated
When, the method includes to x application positive value.
According to the LLC resonance converter of second aspect, wherein the resonant tank includes resonant inductance and resonant capacitance.
Detailed description of the invention
Fig. 1 is the circuit diagram of conventional LLC series resonant converter；
Fig. 2 is the chart for showing the gain curve for LLC power converter shown in FIG. 1；
Fig. 3 is to show look-up table and the demonstration for being applied to the rectifier with nominal neighbouring loopback value (tank value)
The chart that efficiency between equation compares；
Fig. 4 is to show look-up table and be applied to the loop element (tank element) with the low side in range of tolerable variance
The chart that efficiency between the demonstration equation of rectifier compares.
Specific embodiment
Fig. 1 is the circuit diagram of Inductivity-Inductivity-capacitor (LLC) series resonant converter 100, the series resonant converter
100 are used for input voltage VgBe converted to the different voltages V at its outputo.In the exemplary embodiments, converter 100 includes inversion
Device 102, LLC series resonant tank 104 and rectifier 106.Inverter 102 is half-bridge inverter, and includes first switch (Mp)
110 and second switch (Mn)112.Switch 110 and 112 is by complementary drive, in resonant tank (resonant tank) 104
Input VinGenerate square wave.Resonant tank 104 includes the inductance (L of series coupleds), series capacitor (Cs) and resonant inductance (Lp),
To realize resonance.Resonant inductance and load parallel coupled.
In the exemplary embodiments, rectifier 106 includes centre-tapped transformer, filter capacitor (CF) the 122, first rectification two
Pole pipe (DP) the 124 and second rectifier diode (DN)126.The AC wave rectification in rectifier self-resonance in 106 future circuit 104 is DC
Output.Rectifier 106 can be half bridge rectifier, full-bridge rectifier or rectifier 106 can be made to send out like that as described in this article
Wave the rectifier of any other type of function.In low output voltage, high current application, the first and second rectifier diodes
124 and 126 are replaced by synchronous rectifier (not shown), to reduce voltage drop (the conduction damage across each semiconductor rectifier
Consumption).
In the exemplary embodiments, LLC converter 100 is also comprising being communicatively coupled to inverter 102, resonant tank 104
And/or the controller 108 of rectifier 106.Controller 108 is configured to execute one or more operations of converter 100, such as herein
As being further elaborated with.For example, controller 108 calculates best bus voltage, the bus voltage using mathematical expression
Appearance as output voltage, load current, input frequency and/or the element (i.e. resonant inductance and resonant capacitance) in the circuit LLC 104
The function of difference.This is operated under peak efficiencies convenient for each element, without reducing such as noise meter noise (psophometric
Noise other performances).Mathematical expression is given below:
Vbus=Vout×Nt×M+Iout×f×y±x (1)
“Vout" be LLC converter 100 output voltage."Nt" be transformer turn ratio." M " is multiplier, for half-bridge
Rectifier applies 2 value, and 1 value is applied for full-bridge rectifier."Iout" be LLC converter 100 real-time output electric current.
" f " is input frequency, and " y " is the coefficient for representing the ripple across 400V bus, " x " be the calibration that can obtain dduring test because
Son.
In the exemplary embodiments, school is completed by operating LLC converter 100 in an open loop mode with nominal resonance frequency
It is quasi-.Can also by with it is predefined load or with predefined bus voltage operation LLC converter 100, to complete opening
LLC converter 100 is operated under ring mode.During the test, output voltage V is measuredo, and compared with desired nominal value.Such as
The output voltage V of fruit measurementoLower than desired value, then it may be concluded that specific loop has lower resonance frequency, therefore it is
Number x will have-veSymbol, and size is function of the measured value to the difference between desired value.Alternatively, if the voltage of measurement
Higher than desired, it means that the resonance frequency of the unit is higher than nominally, and coefficient x will have+veSymbol.Size is measurement
It is worth the function to the difference between desired value.
Fig. 2 is the chart for showing the gain curve for (shown in FIG. 1) LLC power converter 100.Gain curve is corresponding
It in the normalization DC output voltage of LLC power converter 100, and include the normalization of the first normalized gain curve 200, second
Gain curve 205 and third normalized gain curve 210.In the exemplary embodiments, resonant inductance has +/- 8% variation,
And resonant capacitance has +/- 5% variation.As shown in Fig. 2, nominal resonance frequency is about 186kHz, and nominal output
Voltage is between 1V and 1.02V.
Fig. 3 be the system using look-up table of showing with using being applied to the upper of the rectifier with the loopback value near nominal
State the chart that the efficiency between the system of equation (1) compares.Fig. 3 show efficiency VS output electric current 10KZ440022155 (TEMP:
25,VIN:230.12,FREQ:60).First curve 300 and the efficiency for the LLC converter that voltage is determined using equation (1) are closed
Connection.Second curve 305 and the system relationship that voltage is determined using look-up table.In the exemplary embodiments, equation (1) is applied to
Rectifier with nominal neighbouring loopback value.As shown in figure 3, representing equation (1) compared with the curve 305 for using look-up table
Curve 300 realize higher efficiency throughout almost whole operation range.
Fig. 4 is to show look-up table and have between the equation (1) of the rectifier of the loop element of the low side of range of tolerable variance
The chart that compares of efficiency.Fig. 4 show CP2725AC54TEMP efficiency VS output electric current 11KZ20003982 (TEMP:25C,
Vin:230V,FREQ:60HZ,Vout:54.5V).First curve 400 and the LLC converter that voltage is determined using equation (1)
Efficiency association.Second curve 405 and the system relationship that voltage is determined using look-up table.As shown in figure 4, with look-up table is used
Curve 405 compare, represent the curve 400 of equation (1) throughout essentially all whole operation range and realize higher efficiency.
Embodiment illustrated herein provides a kind of controller, realizes the mathematical method for calculating best bus voltage, the bus
Voltage is the letter of the tolerance of output voltage, load current, input frequency and LLC loop element (i.e. resonant inductance and resonant capacitance)
Number.Embodiment can be such that each element operates under peak efficiencies, other performances without reducing such as noise meter noise.This
Outside, embodiment provides a kind of process to obtain the coefficient for compensating the tolerance in LLC resonance converter, and does not have to measurement circuit
Frequency.
This written explanation discloses the present invention using the example comprising preference pattern, in addition can make any technology of this field
Personnel put the invention into practice, comprising manufacturing and using any equipment or system and the method that executes any combination.The present invention
The range of patentability be defined by the claims, and may include other thinkable examples of those skilled in the art.If
Other examples have be not different from claim literal language constituent element, or if it includes with claim
Literal language have insubstantial difference equivalent structural elements, then other examples are contemplated within the scope of the claims
It is interior.
Terms used herein controller can refer to electronic controller, may include computer processor or processing is set
Standby (not shown).Processor is usually any hardware for being capable of handling information, and the information is all can if any such as data, computer
Reader code, instruction etc. (usually " computer program ", such as software, firmware) and/or other electronic information appropriate.
For example, processor is configurable to execute computer program or order, can store in onboard processing device, or in addition may be used
To be stored in associated memory (not shown).In yet another example, processor can be embodied as or additionally comprise
One or more specific integrated circuits (ASIC), field programmable gate array (FPGA) etc..Therefore, although processor is able to carry out
Computer program executes one or more functions, but various exemplary processors are able to carry out one or more functions, and
Without the assistance of computer program.Electronics or computer storage used herein can usually store any hard of information
Part, data, computer program and/or other information appropriate of the information such as occasional nature or permanent nature.One
In a example, memory is configurable to store various information in one or more databases.Memory may include volatile
Property and/or nonvolatile memory, can be fixed or movably.The example of memory appropriate includes arbitrary access
Memory (RAM), read-only memory (ROM), hard disk drive, flash memories, thumb actuator, movable computer magnetic
Disk, CD, tape or above-mentioned some combinations.CD may include compact disk read-only memory (CDROM), compact disk
Memory (CD-R/W), digital video disc memory (DVD) etc..In various examples, memory can be referred to as computer can
Storage medium is read, as the non-transitory equipment that can store information, it is possible to distinguish in such as can be by information from a position
Set the computer-readable transmission medium carried to another the temporary signal of electronics.Herein described computer-readable medium one
As can refer to computer readable storage medium or computer-readable transmission medium.
Claims (8)
1. a kind of method for calibrating Inductivity-Inductivity-capacitor (LLC) resonance converter (100), which comprises
By being coupled to Inductivity-Inductivity-capacitor resonance converter controller in Inductivity-Inductivity-capacitor resonance converter
Calibration during the Inductivity-Inductivity-capacitor resonance converter is operated with nominal resonance frequency in an open loop mode；
When operating under the nominal resonance frequency and predetermined bus voltage, the Inductivity-Inductivity-is measured by the controller
The open loop output voltage of capacitor resonance converter；And
The open loop output voltage of measurement is compared with the nominal output voltage of storage in the controller by controller, with true
Determine the polarity of Inductivity-Inductivity-capacitor resonance converter calibration factor；
Inductivity-Inductivity-capacitor resonance converter best bus voltage is calculated by controller, the open loop output as measurement
Voltage, calibration factor, load current and including Inductivity-Inductivity-capacitor resonance converter resonant inductor and resonant capacitance
The function of the predefined operational tolerance of the variation range of device；With
Inductivity-Inductivity-capacitor is operated in a normal operating mode under the best bus voltage calculated by controller
Resonance converter, to improve inductance-electricity while meeting the predefined operational tolerance of resonant inductor and resonant capacitor
Sense-efficiency of the capacitor resonance converter under all loading conditions.
2. calibration Inductivity-Inductivity-capacitor resonance converter method as described in claim 1, wherein mathematically calculate total
Line voltage includes: according to Vbus=Vout×Nt×M+Iout× f × y ± x calculates bus voltage, wherein VbusIt is bus voltage,
VoutIt is the Inductivity-Inductivity-capacitor resonance converter (100) output voltage, NtIt is the turn ratio of transformer (120), M
It is multiplier, IoutThe real-time output electric current of the Inductivity-Inductivity-capacity commutator, f is input frequency, y be represent across
The coefficient of the ripple of 400V bus, x are the calibration factors that can be obtained dduring test, wherein when measured output electricity
It forces down when the bus voltage calculated, to the calibration factor x application negative value, and works as the measured output voltage
When higher than the bus voltage calculated, to the calibration factor x application positive value.
3. calibration Inductivity-Inductivity-capacitor resonance converter method as claimed in claim 2, wherein the inductance-electricity
Sense-capacitor resonance converter (100) includes half bridge rectifier (106), and the method also includes using the multiplier M 2 value
To calculate bus voltage.
4. calibration Inductivity-Inductivity-capacitor resonance converter method as claimed in claim 2, wherein the inductance-electricity
Sense-capacitor resonance converter (100) includes full-bridge rectifier (106), and the method also includes using the multiplier M 1 value
To calculate bus voltage.
5. a kind of Inductivity-Inductivity-capacitor (LLC) resonance converter (100), comprising:
Inverter (102)；
Resonant tank (104)；And
Controller (108), is coupled to the inverter and the resonant tank, and the controller is configured that
Described in being operated in an open loop mode with nominal resonance frequency during the calibration of Inductivity-Inductivity-capacitor resonance converter
Inductivity-Inductivity-capacitor resonance converter；
When operating under the nominal resonance frequency and predetermined bus voltage, the Inductivity-Inductivity-capacitor resonance conversion is measured
The output voltage of device；And
By the way that the open loop output voltage of measurement to be compared with the nominal output voltage of storage in the controller, to determine electricity
The polarity of sense-inductor-capacitor resonance converter calibration factor；
Inductivity-Inductivity-capacitor resonance converter best bus voltage is calculated, as the open loop output voltage of measurement, school
Quasi-divisor, load current and the variation including Inductivity-Inductivity-capacitor resonance converter resonant inductor and resonant capacitor
The function of the predefined operation tolerance of range；With
Inductivity-Inductivity-capacitor resonance converter is operated in a normal operating mode under the best bus voltage calculated,
It is humorous to improve Inductivity-Inductivity-capacitor while meeting the predefined operational tolerance of resonant inductor and resonant capacitor
Efficiency of the vibration converter under all loading conditions.
6. Inductivity-Inductivity as claimed in claim 5-capacitor resonance converter, wherein the controller (108) also configures
To be operated with predefined load and at least one of predefined bus voltage.
7. Inductivity-Inductivity as claimed in claim 5-capacitor resonance converter, wherein in order to mathematically calculate bus electricity
Pressure, the controller (108) are additionally configured to according to Vbus=Vout×Nt×M+Iout× f × y ± x calculates bus voltage,
In, VbusIt is bus voltage, VoutIt is the output voltage of the Inductivity-Inductivity-capacity commutator (100), NtIt is transformer
(120) turn ratio, M are multiplier, IoutIt is the real-time output electric current of the Inductivity-Inductivity-capacity commutator, f is input frequency
Rate, y are the coefficients for representing the ripple across 400V bus, and x is the calibration factor that can be obtained dduring test, wherein when measured
The output voltage be lower than the bus voltage calculated when, to calibration factor x application the negative value, and work as it is measured
When the output voltage is higher than the bus voltage calculated, to the calibration factor x application positive value.
8. Inductivity-Inductivity as claimed in claim 5-capacitor resonance converter, wherein the resonant tank (104) includes
Resonant inductance and resonant capacitance.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361793763P | 2013-03-15 | 2013-03-15 | |
| US61/793763 | 2013-03-15 | ||
| US14/189154 | 2014-02-25 | ||
| US14/189,154 US9548670B2 (en) | 2013-03-15 | 2014-02-25 | Methods and systems for calibrating a resonant converter |
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| Publication Number | Publication Date |
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| CN104052291A CN104052291A (en) | 2014-09-17 |
| CN104052291B true CN104052291B (en) | 2019-11-15 |
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| CN201410096700.5A Active CN104052291B (en) | 2013-03-15 | 2014-03-17 | For calibrating the method and system of resonance converter |
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| DE102016204941A1 (en) * | 2016-03-24 | 2017-09-28 | Continental Automotive Gmbh | Method for determining a load current and battery sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| TWI363481B (en) * | 2008-03-28 | 2012-05-01 | Delta Electronics Inc | Synchronous rectifying circuit having burst mode controller and controlling method thereof |
| US9166489B2 (en) * | 2009-02-27 | 2015-10-20 | Delta Electronics (Shanghai) Co., Ltd. | Layouts of multiple transformers and multiple rectifiers of interleaving converter |
| AU2011218467A1 (en) * | 2010-02-22 | 2012-08-30 | Petra Solar Inc. | Method and system for controlling resonant converters used in solar inverters |
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