CN107085141A - A kind of resonance point method for catching, controller and seizure system - Google Patents
A kind of resonance point method for catching, controller and seizure system Download PDFInfo
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- CN107085141A CN107085141A CN201710447101.7A CN201710447101A CN107085141A CN 107085141 A CN107085141 A CN 107085141A CN 201710447101 A CN201710447101 A CN 201710447101A CN 107085141 A CN107085141 A CN 107085141A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a kind of resonance point method for catching, this method includes determining the ideal resonant frequency f0 of the resonant network；Determine that measurement frequency is interval according to ideal resonant frequency f0 and default incidence coefficient, the measurement frequency interval includes multiple measurement frequencies including ideal resonant frequency f0；The working frequency respectively using the measurement frequency as the resonant network charges to the output capacitance of the resonant network under the same conditions, obtains the output capacitance from the charging interval needed for the first predeterminated voltage to the second predeterminated voltage；The charging interval of output capacitance under different measurement frequencies is contrasted to determine the minimum charging interval, minimum charging interval corresponding measurement frequency is defined as to the actual resonance frequency of resonant network.System is caught the embodiment of the invention also discloses a kind of controller and resonance point.The embodiment of the present invention can reduce measurement cost, improve Measurement reliability.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly to a kind of resonance point method for catching, controller and seizure system
System.
Background technology
Resonant frequency has highly important influence to the service behaviour of resonance type switching power.In actual applications, it is humorous
Shake inductance and resonant capacitance is influenceed to cause resonant frequency to there is deviation by the accuracy of manufacture and working environment etc..It is most of at present
Resonance type switching power there is no resonance point measurement function, limited mainly by the precision of manual control resonant inductance and resonant capacitance
Resonant frequency processed.The resonance type switching power of fraction carries the measurement function of resonance point, and it, which is mainly, uses current sensor
The electric current and voltage of resonant tank are measured with voltage sensor, and resonance point is obtained frequently according to obtained electric current and voltage
Rate.Although this mode can measure resonant frequency, need to borrow current sensor and voltage sensor, and in resonant frequency
Height sensors, the analog-digital converter of high speed or comparator sampling are needed to use when higher and then to recognize resonant frequency, from
And cause measurement cost to increase, reliability reduction.
Therefore, need at present it is a kind of can reduce measurement cost, improve Measurement reliability resonance point method for catching, control
Device and seizure system.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of resonance point that can be reduced measurement cost, improve Measurement reliability
Method for catching, controller and seizure system.
In a first aspect, the embodiments of the invention provide a kind of resonance point method for catching, the reality for obtaining resonant network
Resonant frequency, methods described includes：Determine the ideal resonant frequency f0 of the resonant network；According to ideal resonant frequency f0 and in advance
If incidence coefficient determines that measurement frequency is interval, the measurement frequency interval includes multiple measurements frequency including ideal resonant frequency f0
Rate；Working frequency respectively using the measurement frequency as the resonant network is to the defeated of the resonant network under the same conditions
Go out electric capacity to be charged, obtain the output capacitance from the charging interval needed for the first predeterminated voltage to the second predeterminated voltage；It is right
Than output capacitance under different measurement frequencies charging interval to determine the minimum charging interval, the minimum charging interval is corresponding
Measurement frequency is defined as the actual resonance frequency of resonant network.
Second aspect, the embodiments of the invention provide a kind of controller, the actual resonance frequency for obtaining resonant network,
The controller includes：First determining unit, the ideal resonant frequency f0 for determining the resonant network；Second determines list
Member, for determining that measurement frequency is interval according to ideal resonant frequency f0 and default incidence coefficient, the measurement frequency interval is included
Multiple measurement frequencies including ideal resonant frequency f0；Measuring unit, under the same conditions respectively with the measurement frequency
The output capacitance is charged as the working frequency of the resonant network, the output capacitance is obtained from the first default electricity
It is pressed onto the charging interval needed for the second predeterminated voltage；Comparing unit, the charging for contrasting output capacitance under different measurement frequencies
Minimum charging interval corresponding measurement frequency is recorded as F0 by the time to determine the minimum charging interval；Setting unit, is used
In the actual resonance frequency that corresponding measurement frequency of minimum charging interval is defined as to resonant network.
The third aspect, the embodiment of the present invention additionally provides a kind of resonance point and catches system, the reality for obtaining resonant network
Border resonant frequency, the system includes dc source, resonance type switching power and controller as described above, and the resonant mode is opened
Powered-down source includes inversion unit, resonant element, rectification unit, output capacitance and the voltage acquisition unit being sequentially connected electrically, described
Inversion unit electrically connects the dc source, and the controller connects the inversion unit to control the inversion unit by direct current
Electricity is converted into the alternating current of different frequency to supply the resonant element, and then makes the rectification unit output different frequency direct current
The output capacitance charging is supplied electricity to, the voltage acquisition unit gathers the voltage of the output capacitance and gives the Voltage Feedback
The controller is so that the controller carries out output control to the inversion unit.
The controller control inversion unit of the embodiment of the present invention exports the alternating current of different frequency, through resonant element, rectification
The direct current of different frequency is converted into after unit to be supplied to output capacitance to be charged, and is obtained with different measurement frequencies to defeated
When going out the charging corresponding to the charging voltage from the first predeterminated voltage to the second predeterminated voltage of output capacitance when electric capacity is charged
Between.By the principle that corresponding charging interval when being charged with resonant frequency to output capacitance is minimum, by comparing with difference
When measurement frequency charges to output capacitance the size in corresponding charging interval come determine minimum charging interval, the minimum
Charging interval corresponding measurement frequency be the resonance type switching power resonant frequency.Compared with prior art, the present invention is real
Sensor need not additionally be increased by applying example, so as to reduce measurement cost, and calculate the charging interval by controller internal clocking, its
Precision is far above extra increased sensor, so as to improve Measurement reliability.
Brief description of the drawings
Technical scheme, is used required in being described below to embodiment in order to illustrate the embodiments of the present invention more clearly
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram that a kind of resonance point provided in an embodiment of the present invention catches system；
Fig. 2 is the principle assumption diagram of resonance type switching power in Fig. 1；
Fig. 3 is a kind of schematic flow diagram of resonance point method for catching provided in an embodiment of the present invention；
Fig. 4 is capacitor charging time provided in an embodiment of the present invention and the relation curve of measurement frequency；
Fig. 5 is a kind of schematic flow diagram for resonance point method for catching that another embodiment of the present invention is provided；
Fig. 6 is a kind of schematic block diagram of controller provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
It should be appreciated that ought be in this specification and in the appended claims in use, term " comprising " and "comprising" be indicated
Described feature, entirety, step, operation, the presence of element and/or component, but be not precluded from one or more of the other feature, it is whole
Body, step, operation, element, component and/or its presence or addition for gathering.
It is the schematic diagram that a kind of resonance point provided in an embodiment of the present invention catches system referring to Fig. 1.The seizure system 1 is used
In the actual resonance frequency for obtaining resonant network.Wherein, resonant network is circuit or device comprising LC resonance circuits, such as resonance
Formula Switching Power Supply.As illustrated, the seizure system 1 includes dc source 21, resonance type switching power 20 and controller 40.Resonance
Formula Switching Power Supply 20 includes inversion unit 22, resonant element 23, rectification unit 24, output capacitance 25 and the voltage being sequentially connected electrically
Collecting unit 27.Inversion unit 22 electrically connects dc source 21, and controller 40 connects inversion unit 22 to control inversion unit 22
Direct current is converted into the alternating current of different frequency to supply resonant element 23, and then it is straight rectification unit 24 is exported different frequency
Stream supplies electricity to output capacitance 25 and charged, and voltage acquisition unit 27 gathers the voltage of output capacitance 25 and by Voltage Feedback to controller 40
So that controller 40 carries out output control to inversion unit 22.In order to reduce measurement error, in embodiments of the present invention, by right
Same output capacitance 25 carries out the charging of predetermined voltage range.In order to realize the electric discharge of the output capacitance 25, the resonant mode is opened
Powered-down source 20 also includes discharge cell 26, so that output capacitance 25 is discharged in time by discharge cell 26.
Specifically, reference picture 2, are a kind of principle assumption diagrams of resonance type switching power 20 provided in an embodiment of the present invention.
In certain embodiments, resonance type switching power 20 also includes preliminary filling unit 28, and preliminary filling unit 28 is connected to the He of inversion unit 22
Between dc source 21, for providing galvanic current for inversion unit 22.Dc source 21 can be 110V direct current
Source.KM1 in preliminary filling unit 28 is main contactor, and KM2 is preliminary filling contactor, and resistance R1 is preliminary filling resistance, and SV1 is voltage detecting
Unit.When being charged to electric capacity C1, KM1, closure KM2 are disconnected, so that dc source 21 charges for electric capacity C1, SV1 connections
The electric capacity C1 detected voltage is simultaneously sent to controller 40 by controller 40.When electric capacity C1 voltage reaches predeterminated voltage such as volume
When determining the 90% of voltage, control KM2 disconnects, KM1 closures, so as to complete the preliminary filling to electric capacity C1., can by electric capacity C1 preliminary filling
To provide stable control source for inversion unit 22, and then output capacitance C3 is charged and surveyed with different measurement frequencies
During the trial charging time, metastable supply voltage ensure that.It should be noted that when carrying out preliminary filling to electric capacity C1,
Inversion unit 22, which may be at working condition, can also be off, to wait electric capacity C1 preliminary fillings to complete, not limiting herein
It is fixed.
Inversion unit 22 includes four switching tubes VT1, VT2, VT3 and VT4, VT1, VT2, VT3 and VT4 control end connection
The output end of controller 40, to receive the control signal of controller 40 so as to export the alternating current of different frequency.Such as controller
40 can control the output duty cycle of inversion unit 22 to be the different waveform of 48.5%, frequency.In addition, inversion unit 22 can be complete
Bridge inversion or semi-bridge inversion, are not limited herein.
Resonant element 23 includes the electric capacity C2 and inductance L being serially connected.
Rectification unit 24 is used to the alternating current exported from inversion unit 22 being transformed into direct current, because inversion unit 22 is defeated
Go out the alternating current of different frequency, rectification unit 24 is also by the direct current of output different frequency to supply output capacitance C3, so that real
Now charged by output capacitance C3 of different measurement frequencies.
Discharge cell 26 is used to discharge to output capacitance 25, in embodiments of the present invention, and discharge cell 26 is resistance
R2.Voltage acquisition unit 27 is used for the voltage for detecting the two ends of output capacitance 25 in real time, and the connection controller of voltage acquisition unit 27
40, the voltage of the output capacitance 25 collected is sent to controller 40 so that controller 40 is exported to inversion unit 22 by it
Control.
In order to realize in identical charge voltage range with the different measurement frequencies in measurement frequency interval to output electricity
Hold 25 chargings to obtain the charging interval corresponding to different measurement frequencies, it is necessary to carry out output capacitance 25 by discharge cell R2
Electric discharge, the charging voltage of output capacitance 25 is charged and can be obtained so as to realize with different measurement frequencies to output capacitance 25
From the charging interval corresponding to the first predeterminated voltage to the second predeterminated voltage.The charging interval of acquisition is compared to obtain most
Small charging interval, the measurement frequency corresponding to the minimum charging interval is the resonant frequency of the resonance type switching power 20.
It is a kind of schematic flow diagram of resonance point method for catching provided in an embodiment of the present invention referring to Fig. 3.The resonance point is caught
Catch the actual resonance frequency that method is used to obtain resonant network.As illustrated, the resonance point method for catching include step S101~
S105。
S101, determines the ideal resonant frequency f0 of resonant network.
S102, determines that measurement frequency is interval, the measurement frequency area according to ideal resonant frequency f0 and default incidence coefficient
Between include ideal resonant frequency f0 including multiple measurement frequencies.
Specifically, two interval endpoint values of measurement frequency are respectively fminAnd fmax, fminFor measurement frequency minimum value, fmax
For measurement frequency maximum, fmin=k1F0, fmax=k2F0, k1And k2For preset value, and k1Less than 1, k2More than 1.
As in embodiments of the present invention, the electric capacity C2 type selectings in resonant element 23 are 4 μ F, and inductance L type selectings are 16 μ H, according to
The LC characteristics of resonant tank and the calculation formula of resonant frequency can calculate the theoretical resonance frequency f for obtaining resonant element 230=
19894Hz.Influenceed by the accuracy of manufacture and working environment, the allowable error of electric capacity is 20%, and the allowable error 10% of inductance takes
Comprehensive change system is ± 15%, and the minimum value that can obtain the resonant frequency of resonant element 23 is：
The maximum of the resonant frequency of resonant element 23 is：
, can be according to the maximum of the resonant frequency of resonant element 23 when measuring the actual resonance frequency of resonance type switching power 20
Value and minimum value are f come two endpoint values for determining measurement frequency intervalminAnd fmax。
From the foregoing, in embodiments of the present invention, k1=0.74, k2=1.36.It should be noted that being returned according to resonance
The LC characteristics on road and influenceed by the accuracy of manufacture and working environment, k1And k2Big I adjusted according to concrete application environment.This
Outside, measurement frequency interval is comprising multiple measurement frequencies including ideal resonant frequency f0, in the actual measurement of resonant frequency
During, the plurality of measurement frequency at least includes 3 measurement frequencies.It is to be appreciated that the plurality of measurement frequency can also include 4
Individual measurement frequency or 5 measurement frequencies or 10 measurement frequencies, are not especially limited herein.
S103, under the same conditions the working frequency respectively using measurement frequency as resonant network output capacitance is filled
Electricity, obtains the charging interval needed for output capacitance from the first predeterminated voltage to the second predeterminated voltage.
Specifically, output capacitance is charged respectively with each measurement frequency in measurement frequency interval, to obtain
Multiple charging intervals corresponding to output capacitance from the first predeterminated voltage to the second predeterminated voltage, that is, the number in the charging interval obtained
The number for measuring the measurement frequency included in interval with measurement frequency is identical.
Due to needing the charging measurement with different measurement frequencies to the identical charge voltage range of output capacitance progress, therefore when defeated
Go out electric capacity to charge to after the second predeterminated voltage from the first predeterminated voltage, it is necessary to carry out discharge process to output capacitance to export electricity
The voltage of appearance returns to the first predeterminated voltage, to change the test that measurement frequency carries out the charging interval.Wherein, the first predeterminated voltage
Selection with the second predeterminated voltage is based on following criterion：When being charged with different measurement frequencies to output capacitance, it is desirable to defeated
Going out electric capacity each discharge time can not be oversize, will such as be set to discharge time 1 minute.It can be seen from the flash-over characteristic of electric capacity, electricity
Pressure value bigger stage, the velocity of discharge is faster, and required discharge time is shorter.In addition, controller should be able to tell different frequencies
The charging interval size of rate comparison point, this is relevant with the sample rate of controller.In embodiments of the present invention, the first predeterminated voltage
Specific selecting step with the second predeterminated voltage is as follows：
(1) charge voltage range, is set as [V1, V2] according to default discharge time；
(2) impedance and the f0 ± △ f at ideal resonant frequency f0, are calculated respectively according to the LC characteristics of resonance circuit
Locate corresponding impedance；
(3) f0 and the corresponding time constant of tri- Frequency points of f0 ± △ f, are calculated according to time constant formula, wherein, when
Between constant k=| Z | × C, C for resonant tank electric capacity size, | Z | be impedance magnitude；
(4) charging interval of the charging voltage of output capacitance at tri- Frequency points of f0 and f0 ± △ f from V1 to V2, is calculated
t0、t1、t2；
(5) the sampling time ts of controller, is obtained, the sampling time is related to controller internal clocking；
(6) when, calculating corresponding with the frequency f0 charging of f0 ± △ two Frequency points of f each self-corresponding charging interval t1, t2
Between t0 difference, i.e. t1-t0, t2-t0, and obtain the minimum value min { t1-t0, t2-t0 } between two time differences；
(7), judge whether min { t1-t0, t2-t0 } ＞ ts set up；
(8) if, min { t1-t0, t2-t0 } ＞ ts set up, by charging voltage V1 be set as the first predeterminated voltage, charging
Voltage V2 is set as the second predeterminated voltage；If not, the charge voltage range V1 and V2 of set-up procedure (1) size, lay equal stress on
It is new to perform until min { t1-t0, t2-t0 } ＞ ts are set up.
Wherein, the LC property calculations that ideal resonant frequency f0 can be in resonant element are obtained, such as the above-mentioned resonance of correspondence
Formula Switching Power Supply C2 type selectings are 4 μ F, and inductance L type selectings are 16 μ H, can obtain the theoretical resonance frequency f of resonant element0=19894Hz.
The minimum value of the resonant frequency of resonant element is f simultaneouslymin=14722KHZ, the maximum of the resonant frequency of resonant element is fmax
=27056KHZ.f0± △ f spans are [fmin、fmax].In embodiments of the present invention, it is considered to length of testing speech and test essence
Degree, can be set as 1KHZ by △ f.
S104, contrasts the charging interval of output capacitance under different measurement frequencies to determine the minimum charging interval.
S105, minimum charging interval corresponding measurement frequency is defined as the actual resonance frequency of resonant network.
Specifically, obtained multiple charging intervals are compared so as to choose the minimum charging interval, and minimum is charged
Time corresponding measurement frequency is defined as the actual resonance frequency of resonant network.
Reference picture 5, is a kind of schematic flow diagram for resonance point method for catching that another embodiment of the present invention is provided.As schemed
Show, the method comprising the steps of S201~S211.
S201, determines the ideal resonant frequency f0 of the resonant network.
S202, determines that measurement frequency is interval, the measurement frequency area according to ideal resonant frequency f0 and default incidence coefficient
Between include ideal resonant frequency f0 including multiple measurements frequency, the measurement frequency interval in adjacent measurement frequency between differ
One frequency measurement step-length △ f, and the interval initial measurement frequency of the measurement frequency is f0, f1, f2, f1=f0- △ f, f1=
f0+△f。
S203, working frequency respectively using frequency f0, f1, f2 as the resonant network is to described defeated under the same conditions
Go out electric capacity to be charged, and correspondence obtains the charging voltage of the output capacitance from the first predeterminated voltage to the second predeterminated voltage institute
Charging interval t0, t1, the t2 needed.
S204, contrasts charging interval of the output capacitance under different measurement frequencies, judges t0 ＜ t1 and t0 ＜ t2 are
It is no to set up.
S205, if t0 ＜ t1 and t0 ＜ t2 establishments, t0 are the minimum charging interval, it would be desirable to which resonant frequency f0 is defined as humorous
The actual resonance frequency of vibrating network.
Specifically, if t0 ＜ t1 and t0 ＜ t2 establishments, t0 is the minimum charging interval, then determines ideal resonant frequency f0
For the actual resonance frequency of resonant network.
S206, if t1 ＜ t0 ＜ t2 are set up, T0 is set to by the current minimum charging interval, will current minimum charging interval T0
Corresponding measurement frequency is recorded as F0, and measurement frequency F1 is set into F1=F0- △ f, and with measurement frequency F1 to output capacitance
Charged, and obtain this corresponding to the charging voltage from the first predeterminated voltage to the second predeterminated voltage of the output capacitance
Charging interval T1.
Specifically, reference picture 4, if t1 ＜ t0 ＜ t2, it is not actual resonance point to illustrate ideal resonant frequency, actual humorous
Vibration frequency is less than ideal resonant frequency in the left side of current measurement frequency, i.e. actual resonance frequency.Can be by left by measurement frequency
Move frequency measurement step-length △ f and obtain frequency F1, and output capacitance is charged with frequency F1, and obtain the charging of output capacitance
This charging interval T1 corresponding to voltage from the first predeterminated voltage to the second predeterminated voltage.
S207, judges whether T1 ＜ T0 set up.
Specifically, T0 is the current minimum charging interval, and T1 is this charging interval, by moving to left frequency measurement step-length △ f
The size in the charging interval corresponding to progress charging measurement and comparison adjacent charging interval twice.If T1 ＜ T0 are set up, illustrate
This charging interval is less than the current minimum charging interval, redirects execution step S206；T1 ＜ T0 are invalid, perform step S208.
S208, corresponding measurement frequency F0 of minimum charging interval is defined as the actual resonance frequency of resonant network.
S209, if t2 ＜ t0 ＜ t1 are set up, T0 is set to by the current minimum charging interval, will current minimum charging interval T0
Corresponding measurement frequency is recorded as F0, and measurement frequency F1 is set into F1=F0+ △ f, and with measurement frequency F1 to output capacitance
Charged, and obtain the charging voltage of the output capacitance and filled from corresponding this of the first predeterminated voltage to the second predeterminated voltage
Electric time T1；
Specifically, reference picture 4, if t2 ＜ t0 ＜ t1, it is not actual resonance point to illustrate ideal resonant frequency, actual humorous
Vibration frequency is more than ideal resonant frequency in the right of current measurement frequency, i.e. actual resonance frequency.Can be by right by measurement frequency
Move frequency measurement step-length △ f and obtain frequency F1, and output capacitance is charged with frequency F1, and obtain the charging of output capacitance
This charging interval T1 corresponding to voltage from the first predeterminated voltage to the second predeterminated voltage.
S210, judges whether T1 ＜ T0 set up.
Specifically, T0 is the current minimum charging interval, and T1 is this charging interval, by moving to right frequency measurement step-length △ f
The size in the charging interval corresponding to progress charging measurement and comparison adjacent charging interval twice.If T1 ＜ T0, illustrate this
Charging interval is less than the current minimum charging interval, redirects execution step S209；If T1 ＜ T0 are invalid, step S211 is performed.
S211, corresponding measurement frequency F0 of minimum charging interval is determined the actual resonance frequency of resonant network.
In some other embodiments, in order to ensure each measurement frequency it is determined that measurement frequency it is interval in, with
Before measurement frequency F1=F0- △ f charge to output capacitance, methods described also includes：Judge F1 ＜ fminWhether set up；
If F1 ＜ fminIt is invalid, the step of execution is charged with measurement frequency F1 to output capacitance；If F1 ＜ fminSet up, then ought
The corresponding measurement frequency F0 of preceding minimum charging interval T0 is defined as the actual resonance frequency of resonant network.In other embodiments
In, before being charged with measurement frequency F1=F0+ △ f to output capacitance, methods described also includes：Judge F1 ＞ fmaxWhether
Set up；If F1 ＞ fmaxIt is invalid, the step of execution is charged with measurement frequency F1 to output capacitance；If F1 ＞ fmaxSet up,
The corresponding measurement frequency F0 of current minimum charging interval T0 are then defined as to the actual resonance frequency of resonant network.
In summary, as t1 ＜ t0 ＜ t2, then it is not actual resonance point to illustrate ideal resonant frequency, actual resonance frequency
Rate is on the measurement frequency F0 left side, and actual resonance frequency is less than ideal resonant frequency, by the way that measurement frequency constantly to be moved to left to △ f,
And comparing the most close charging interval twice until this charging interval is more than charging interval last time, then charging interval last time T0 is
Minimum charging interval, the measurement frequency corresponding to charging interval last time T0 is defined as the resonant frequency of resonant network.As t0 ＜ t1
And during t0 ＜ t2, then it is actual resonant frequency to illustrate ideal resonant frequency, then ideal resonant frequency f0 is defined as into resonant mode
The resonant frequency of Switching Power Supply.As t2 ＜ t0 ＜ t1, then it is not actual resonance point, actual resonance to illustrate ideal resonant frequency
Frequency is on measurement frequency F0 the right, and actual resonance frequency is less than ideal resonant frequency, by the way that measurement frequency is constantly moved to right into △
F, and compare the most close charging interval twice until this charging interval is more than charging interval last time, then charging interval last time T0
For the minimum charging interval, the measurement frequency corresponding to charging interval last time T0 is defined as the resonant frequency of resonance type switching power.
Fig. 6 is a kind of schematic block diagram of controller provided in an embodiment of the present invention.The controller 40 is used to measure resonance
The resonant frequency of network.As illustrated, the controller 40 includes the first determining unit 41, the second determining unit 42, measuring unit
43rd, comparing unit 44 and setting unit 45.
First determining unit 41, the ideal resonant frequency f0 for determining the resonant network.
Second determining unit 42, for determining that measurement frequency is interval according to ideal resonant frequency f0 and default incidence coefficient,
The measurement frequency interval includes multiple measurement frequencies including ideal resonant frequency f0.
Measuring unit 43, for being used as the work of resonant network frequency using the measurement frequency respectively under the same conditions
Rate charges to the output capacitance, obtains the output capacitance from filling needed for the first predeterminated voltage to the second predeterminated voltage
The electric time.
Comparing unit 44, during for contrasting the charging interval of output capacitance under different measurement frequencies to determine that minimum charges
Between, and minimum charging interval corresponding measurement frequency is recorded as F0.
Setting unit 45, the actual resonance frequency for corresponding measurement frequency of minimum charging interval to be defined as to resonant network
Rate.
The embodiment of the present invention is by the minimum original of corresponding charging interval when being charged with resonant frequency to output capacitance
Reason, the size in corresponding charging interval determines minimum when being charged by comparing with different measurement frequencies to output capacitance
Charging interval, the corresponding measurement frequency of minimum charging interval is the resonant frequency of the resonance type switching power.Compare
Prior art, the embodiment of the present invention need not additionally increase sensor, so that measurement cost is reduced, and when inside controller
Clock calculates the charging interval, and its precision is far above extra increased sensor, so as to improve Measurement reliability.
It is apparent to those skilled in the art that, for convenience of description and succinctly, the control of foregoing description
The specific work process of device and unit processed, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
It is apparent to those skilled in the art that, for convenience of description and succinctly, the control of foregoing description
The specific work process of device and unit processed, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed controller and method, it can pass through
Other modes are realized.For example, appliance arrangement embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, such as multiple units or component
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.In addition, shown or beg for
The coupling each other of opinion or direct-coupling or communication connection can be by the indirect of some interfaces, appliance arrangement or unit
Coupling or communication connection or electricity, mechanical or other forms are connected.
Step in present invention method can be sequentially adjusted, merged and deleted according to actual needs.
Unit in controller of the embodiment of the present invention can be combined, divided and deleted according to actual needs.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize first embodiment of the invention according to the actual needs
The purpose of scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
It is that unit is individually physically present or two or more units are integrated in a unit.It is above-mentioned integrated
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is realized using in the form of SFU software functional unit and as independent production marketing or used
When, it can be stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially
The part contributed in other words to prior art, or all or part of the technical scheme can be in the form of software product
Embody, the computer software product is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, controller, or network equipment etc.) performs the complete of each embodiment methods described of the invention
Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It is above the preferred embodiment of invention, rather than any formal limitation is done to invention.Those skilled in the art
Various equivalent changes and improvement, all equivalent changes done within the scope of the claims can be imposed on the basis of above-described embodiment
Change or modify, all should fall within the scope of invention.
Claims (10)
1. a kind of resonance point method for catching, the actual resonance frequency for obtaining resonant network, it is characterised in that methods described bag
Include：
Determine the ideal resonant frequency f0 of the resonant network；
Determine that measurement frequency is interval according to ideal resonant frequency f0 and default incidence coefficient, the measurement frequency interval includes ideal
Multiple measurement frequencies including resonant frequency f0；
Working frequency respectively using the measurement frequency as the resonant network is to the resonant network under the same conditions
Output capacitance is charged, and obtains the output capacitance from the charging interval needed for the first predeterminated voltage to the second predeterminated voltage；
The charging interval of output capacitance under different measurement frequencies is contrasted to determine the minimum charging interval, by the minimum charging interval
Corresponding measurement frequency is defined as the actual resonance frequency of resonant network.
2. the method as described in claim 1, it is characterised in that two interval endpoint values of the measurement frequency are respectively fmin
And fmax, fminFor measurement frequency minimum value, fmaxIt is described according to ideal resonant frequency f0 and default to close for measurement frequency maximum
Contact number determines that measurement frequency interval is specially：
fmin=k1F0, fmax=k2F0, the k1And k2For preset value, and k1Less than 1, k2More than 1.
3. the method as described in claim 1, it is characterised in that phase between the adjacent measurement frequency in the measurement frequency interval
Initial measurement frequency in poor frequency measurement step-length △ f, the surveying range is f0, f1, f2, f1=f0- △ f, f2=
F0+ △ f,
The working frequency under the same conditions respectively using the measurement frequency as the resonant network is to the Resonance Neural Network
The output capacitance of network is charged, and obtains the output capacitance from during charging needed for the first predeterminated voltage to the second predeterminated voltage
Between concretely comprise the following steps：
The working frequency respectively using frequency f0, f1, f2 as the resonant network is entered to the output capacitance under the same conditions
Row charging, and correspondence obtains the charging needed for the charging voltage from the first predeterminated voltage to the second predeterminated voltage of the output capacitance
Time t0, t1, t2；
The charging interval for contrasting output capacitance under different measurement frequencies, to determine the minimum charging interval, the minimum is charged
Time, corresponding measurement frequency was defined as concretely comprising the following steps for the actual resonance frequency of resonant network：
Charging interval of the output capacitance under different measurement frequencies is contrasted, if t0 ＜ t1 and t0 ＜ t2 establishments, t0 is most
The small charging interval, it would be desirable to which resonant frequency f0 is defined as the actual resonance frequency of resonant network.
4. method as claimed in claim 3, it is characterised in that methods described also includes：
If t1 ＜ t0 ＜ t2 are set up, the current minimum charging interval is set to T0, will currently corresponding survey of minimum charging interval T0
Amount frequency record is F0, and measurement frequency F1 is set into F1=F0- △ f, and output capacitance is charged with measurement frequency F1,
And obtain this charging interval corresponding to the charging voltage from the first predeterminated voltage to the second predeterminated voltage of the output capacitance
T1；
Judge whether T1 ＜ T0 set up；
If T1 ＜ T0, redirect execution and the current minimum charging interval is set to T0, will currently corresponding survey of minimum charging interval T0
Amount frequency record is F0, measurement frequency F1 is set into F1=F0- △ f, and carry out using measurement frequency F1 as to output capacitance
The step of charging, until during T1 ＞ T0, the reality that corresponding measurement frequency F0 of minimum charging interval is defined as into resonant network is humorous
Vibration frequency.
5. the method as described in claim 3 or 4, it is characterised in that methods described also includes：
If t2 ＜ t0 ＜ t1 are set up, the current minimum charging interval is set to T0, will currently corresponding survey of minimum charging interval T0
Amount frequency record is F0, and measurement frequency F1 is set into F1=F0+ △ f, and output capacitance is charged with measurement frequency F1,
And the charging voltage of the output capacitance is obtained from corresponding this charging interval T1 of the first predeterminated voltage to the second predeterminated voltage；
Judge whether T1 ＜ T0 set up；
If T1 ＜ T0, redirect execution and the current minimum charging interval is set to T0, will currently corresponding survey of minimum charging interval T0
Amount frequency record is F0, measurement frequency F1 is set into F1=F0+ △ f, and carry out using measurement frequency F1 as to output capacitance
The step of charging, until during T1 ＞ T0, corresponding measurement frequency F0 of minimum charging interval to be determined to the actual resonance of resonant network
Frequency.
6. method as claimed in claim 4, it is characterised in that charged with measurement frequency F1=F0- △ f to output capacitance
Before, methods described also includes：
Judge F1 ＜ fminWhether set up；
If F1 ＜ fminIt is invalid, the step of execution is charged with measurement frequency F1 to output capacitance；
If F1 ＜ fminSet up, then the corresponding measurement frequency F0 of current minimum charging interval T0 are defined as to the reality of resonant network
Resonant frequency.
7. method as claimed in claim 5, it is characterised in that charged with measurement frequency F1=F0+ △ f to output capacitance
Before, methods described also includes：
Judge F1 ＞ fmaxWhether set up；
If F1 ＞ fmaxIt is invalid, the step of execution is charged with measurement frequency F1 to output capacitance；
If F1 ＞ fmaxSet up, then the corresponding measurement frequency F0 of current minimum charging interval T0 are defined as to the reality of resonant network
Resonant frequency.
8. a kind of controller, the actual resonance frequency for obtaining resonant network, it is characterised in that the controller includes：
First determining unit, the ideal resonant frequency f0 for determining the resonant network；
Second determining unit, it is described to survey for determining that measurement frequency is interval according to ideal resonant frequency f0 and default incidence coefficient
Measure frequency separation and include multiple measurement frequencies including ideal resonant frequency f0；
Measuring unit, for working frequency under the same conditions respectively using the measurement frequency as the resonant network to institute
State output capacitance to be charged, obtain the output capacitance from during charging needed for the first predeterminated voltage to the second predeterminated voltage
Between；
Comparing unit, for contrasting the charging interval of output capacitance under different measurement frequencies to determine the minimum charging interval, and will
Minimum charging interval, corresponding measurement frequency was recorded as F0；
Setting unit, the actual resonance frequency for corresponding measurement frequency of minimum charging interval to be defined as to resonant network.
9. a kind of resonance point catches system, the actual resonance frequency for obtaining resonant network, it is characterised in that including direct current
Source, resonance type switching power and controller as claimed in claim 8, the resonance type switching power include what is be sequentially connected electrically
Inversion unit, resonant element, rectification unit, output capacitance and voltage acquisition unit, the inversion unit electrically connect the direct current
Power supply, the controller connects the inversion unit to control the inversion unit that direct current is converted into the exchange of different frequency
Electricity makes the rectification unit output different frequency direct current supply electricity to the output capacitance charging to supply the resonant element,
The Voltage Feedback is simultaneously given the controller so that the control by the voltage of the voltage acquisition unit collection output capacitance
Device processed carries out output control to the inversion unit.
10. resonance point as claimed in claim 9 catches system, it is characterised in that the resonance type switching power also includes pre-
Unit is filled, the preliminary filling unit is connected between inversion unit and dc source, for providing stabilization for the inversion unit
Direct current.
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