CN108092504A - A kind of parameter determination method and device of Buck circuits - Google Patents
A kind of parameter determination method and device of Buck circuits Download PDFInfo
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- CN108092504A CN108092504A CN201711285278.8A CN201711285278A CN108092504A CN 108092504 A CN108092504 A CN 108092504A CN 201711285278 A CN201711285278 A CN 201711285278A CN 108092504 A CN108092504 A CN 108092504A
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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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
Abstract
The present invention provides a kind of parameter determination methods and device of Buck circuits, first determine duty cycle, and are initially worth to inductance inductance value initial value and capacitor's capacity initial value based on switching frequency；Then judge whether inductance inductance value initial value and capacitor's capacity initial value meet intrinsic safety requirements, and then obtain final inductance inductance value, capacitor's capacity and switching frequency, it can not only ensure that Buck circuits meet ripple performance requirement, Buck circuits can more be made to meet the requirement of essential safety performance.The present invention needs to carry out inductance inductance value initial value and capacitor's capacity initial value the judgement of intrinsic safety requirements, substantially increases the accuracy of final inductance inductance value, capacitor's capacity and switching frequency；And the present invention is solved by extreme value and separates inductance and capacitance, and complicated iterative solution process is not required, process is simple, it is easy to accomplish.
Description
Technical field
The present invention relates to explosion-proof electrification security technology areas, and in particular to a kind of parameter determination method and dress of Buck circuits
It puts.
Background technology
Buck circuits applied to explosive gas atmosphere need quickly to protect so that Buck by rational parameter coordination
The essential safety performance of circuit is met the requirements.Due to Buck circuits there are turn on process and the procedures of turn-off of switching tube, inductance with
And the energy storage of capacitance and release power process, therefore Buck circuits belong to compound circuit, it is impossible to directly using GB3836.4-2010
In minimum keep-alive voltage (Minimum Igniting Voltage, MIV) curve and minimum ignition current (Minimum
Igniting Current, MIC) curve determines the parameters of Buck circuits, it is necessary to apply integral energy constraint.The ginseng of Buck circuits
Number must simultaneously meet ripple performance requirement and the requirement of essential safety performance, and wherein essential safety performance index refers to meeting such as
Lower three conditions：1) the total surplus energy of inductance and capacitance is less than the minimum ignition energy (Minimum of explosive mixed gas
Ignition Energy, MIE), 2) inductance meets MIC curves, and 3) capacitance meets MIV curves.Occur inductance open-circuit arc or
During person's capacitance short-circuit electric arc, it is assumed that detection circuit can quickly cut off power supply, and ignore power input energy and resistance consumption energy
On the premise of, if the total surplus energy of inductance and capacitance reaches essential safety due to being less than MIE, Buck circuits.The prior art
The parameter determination method of middle Buck circuits does not consider the integral energy constraint corresponding to the total surplus energy of inductance and capacitance, causes
The essential safety performance of Buck circuits is unsatisfactory for requiring.
The content of the invention
The defects of in order to which the above-mentioned circuits of Buck in the prior art is overcome to be unsatisfactory for the requirement of essential safety performance, the present invention provides
A kind of parameter determination method and device of Buck circuits first determine duty cycle, and are initially worth to inductance sense based on switching frequency
It is worth initial value and capacitor's capacity initial value；Then judge whether inductance inductance value initial value and capacitor's capacity initial value meet essential peace
Full requirement, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value are respectively final inductance sense
Otherwise value, capacitor's capacity and switching frequency determine final switch frequency according to inductance inductance value initial value and capacitor's capacity initial value
Rate, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain final inductance inductance value
And capacitor's capacity, it can not only ensure that Buck circuits meet ripple performance requirement, more Buck circuits can be made to meet intrinsic safety
It can requirement.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
On the one hand, the present invention provides a kind of parameter determination method of Buck circuits, and the Buck circuits include power supply, switch
Pipe, diode, inductance, capacitance and resistance；The power supply, switching tube, inductance and resistance are sequentially connected in series, the cathode of the diode
It is connected between switching tube and inductance, anode is connected between resistance and power supply, and described capacitance one end is connected to inductance and electricity
Between resistance, the other end is connected between resistance and power supply；The definite method includes：
Switching frequency initial value is determined according to ripple factor, and calculates the duty cycle and resistance of switching tube；
Determine the relation of the total surplus energy and inductance inductance value initial value and capacitor's capacity initial value of inductance and capacitance, and root
Inductance and capacitance are determined according to the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value
Total surplus energy-minimum and switching frequency initial value and duty cycle relation；
Electricity is determined according to the relation of the total surplus energy-minimum of inductance and capacitance and switching frequency initial value and duty cycle
Feel inductance value initial value and capacitor's capacity initial value, and judge whether inductance inductance value initial value and capacitor's capacity initial value meet essence
Safety requirements, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value are respectively final inductance
Inductance value, capacitor's capacity and switching frequency；Otherwise final switch is determined according to inductance inductance value initial value and capacitor's capacity initial value
Frequency, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain final inductance sense
Value and capacitor's capacity.
The duty cycle is calculated as follows：
Wherein, D represents duty cycle, VoRepresent output voltage, ViRepresent input voltage.
The resistance is calculated as follows：
Wherein, R represents resistance, IoRepresent load current.
The total surplus energy and the relation of inductance inductance value initial value and capacitor's capacity initial value of the inductance and capacitance are pressed
Formula determines：
Wherein, WrAt the beginning of representing that the total surplus energy of inductance and capacitance, L represent that inductance inductance value initial value, C represent capacitor's capacity
Initial value.
According to the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value, press
Formula determines inductance and the total surplus energy-minimum of capacitance and switching frequency initial value and the relation of duty cycle：
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, Δ V% tables
Show ripple factor.
According to the total surplus energy-minimum of inductance and capacitance and switching frequency initial value and the relation of duty cycle, as the following formula
Determine inductance inductance value initial value and capacitor's capacity initial value：
Wherein, WminRepresent the total surplus energy setting value of inductance and capacitance.
It is described to judge whether inductance inductance value initial value and capacitor's capacity initial value meet intrinsic safety requirements, including：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum searched respectively in GB3836.4-2010 is lighted
Current curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity
Initial value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, I1Represent that the minimum in GB3836.4-2010 lights electricity
The corresponding electric current of flow curve, V1Represent that the minimum in GB3836.4-2010 lights the corresponding voltage of voltage curve.
It is described that final switching frequency is determined according to inductance inductance value initial value and capacitor's capacity initial value, including：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is most at this time
Whole switching frequency.
On the other hand, the present invention also provides a kind of parameter determining device of Buck circuits, the Buck circuits include power supply,
Switching tube, diode, inductance, capacitance and resistance；The power supply, switching tube, inductance and resistance are sequentially connected in series, the diode
Cathode is connected between switching tube and inductance, and anode is connected between resistance and power supply, and described capacitance one end is connected to inductance
Between resistance, the other end is connected between resistance and power supply；The determining device includes：
Computing module for determining switching frequency initial value according to ripple factor, and calculates the duty cycle and electricity of switching tube
Hinder resistance value；
Determining module, for determining that the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity are initial
The relation of value, and it is true according to the total surplus energy and the relation of inductance inductance value initial value and capacitor's capacity initial value of inductance and capacitance
Determine inductance and the total surplus energy-minimum of capacitance and switching frequency initial value and the relation of duty cycle；
Judgment module, for the total surplus energy-minimum according to inductance and capacitance and switching frequency initial value and duty cycle
Relation determine inductance inductance value initial value and capacitor's capacity initial value, and judge inductance inductance value initial value and capacitor's capacity initial value
Whether intrinsic safety requirements are met, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value difference
For final inductance inductance value, capacitor's capacity and switching frequency；Otherwise it is true according to inductance inductance value initial value and capacitor's capacity initial value
Fixed final switching frequency, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain
Final inductance inductance value and capacitor's capacity.
Duty cycle is calculated as follows in the computing module：
Wherein, D represents duty cycle, VORepresent output voltage, ViRepresent input voltage.
Resistance is calculated as follows in the computing module：
Wherein, R represents resistance, IoRepresent load current.
The determining module includes the first determination unit, and first determination unit determines the total of inductance and capacitance as the following formula
Dump energy and the relation of inductance inductance value initial value and capacitor's capacity initial value：
Wherein, WrAt the beginning of representing that the total surplus energy of inductance and capacitance, L represent that inductance inductance value initial value, C represent capacitor's capacity
Initial value.
The determining module further includes the second determination unit, and second determination unit is according to inductance and the total surplus of capacitance
The relation of energy and inductance inductance value initial value and capacitor's capacity initial value determines the total surplus energy of inductance and capacitance most as the following formula
Small value and switching frequency initial value and the relation of duty cycle：
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, Δ V% tables
Show ripple factor.
The judgment module includes the 3rd determination unit, and the 3rd determination unit is according to inductance and the total surplus energy of capacitance
Minimum value and switching frequency initial value and the relation of duty cycle are measured, determines that inductance inductance value initial value and capacitor's capacity are initial as the following formula
Value：
Wherein, WminRepresent the total surplus energy setting value of inductance and capacitance.
The judgment module further includes judging unit, and the judging unit judges inductance inductance value initial value according to following processes
Whether meet intrinsic safety requirements with capacitor's capacity initial value：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum searched respectively in GB3836.4-2010 is lighted
Current curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity
Initial value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, I1Represent that the minimum in GB3836.4-2010 lights electricity
The corresponding electric current of flow curve, V1Represent that the minimum in GB3836.4-2010 lights the corresponding voltage of voltage curve.
The judgment module further includes the 4th determination unit, and the 4th determination unit is according to inductance inductance value initial value and electricity
Hold capacitance initial value, final switching frequency is determined according to following processes：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is most at this time
Whole switching frequency.
Compared with the immediate prior art, technical solution provided by the invention has the advantages that：
In the parameter determination method of Buck circuits provided by the invention, duty cycle is first determined, and it is initial based on switching frequency
It is worth to inductance inductance value initial value and capacitor's capacity initial value；Then judging inductance inductance value initial value and capacitor's capacity initial value is
It is no to meet intrinsic safety requirements, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value are respectively
Final inductance inductance value, capacitor's capacity and switching frequency, otherwise determines according to inductance inductance value initial value and capacitor's capacity initial value
Final switching frequency, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain most
Whole inductance inductance value and capacitor's capacity, can not only ensure that Buck circuits meet ripple performance requirement, more can expire Buck circuits
Sufficient essential safety performance requirement；
The parameter determining device of Buck circuits provided by the invention includes computing module, determining module and judgment module,
In computing module, for determining switching frequency initial value according to ripple factor, and calculate switching tube duty cycle and resistance resistance
Value；Determining module therein, at the beginning of determining the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity
The relation of initial value, and determine inductance and the total surplus energy-minimum of capacitance and switching frequency initial value and the relation of duty cycle；
Judgment module therein, for determining inductance inductance value initial value and capacitor's capacity initial value, and judge inductance inductance value initial value and
Whether capacitor's capacity initial value meets final inductance inductance value, capacitor's capacity and the switching frequency of intrinsic safety requirements, can not only
Ensure that Buck circuits meet ripple performance requirement, Buck circuits can more be made to meet the requirement of essential safety performance；
It needs to carry out essential peace to inductance inductance value initial value and capacitor's capacity initial value in technical solution provided by the invention
The judgement required entirely substantially increases the accuracy of final inductance inductance value, capacitor's capacity and switching frequency；
Technical solution provided by the invention is solved by extreme value and separates inductance and capacitance, and complicated iterative solution is not required
Process, process are simple, it is easy to accomplish.
Description of the drawings
Fig. 1 is Buck circuit structure diagrams in the embodiment of the present invention；
Fig. 2 is the parameter determination method flow chart of Buck circuits in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The embodiment of the present invention provides a kind of parameter determination method of Buck circuits, concrete structure such as Fig. 1 institutes of Buck circuits
Show, including power supply E, switching tube S, diode D1, inductance L, capacitance C and resistance R；Power supply E, switching tube S, inductance L and resistance R
It being sequentially connected in series, the cathode of diode D1 is connected between switching tube S and inductance L, and anode is connected between resistance R and power supply E,
Capacitance C one end is connected between inductance L and resistance R, and the other end is connected between resistance R and power supply E；The embodiment of the present invention provides
Buck circuits parameter determination method detailed process it is as follows：
S101：Switching frequency initial value is determined according to ripple factor, and calculates the duty cycle and resistance of switching tube；
Duty cycle is calculated as follows：
Wherein, D represents duty cycle, VORepresent output voltage, ViRepresent input voltage.
Resistance is calculated as follows：
Wherein, R represents resistance, IoRepresent load current.
S102：Determine the pass of the total surplus energy and inductance inductance value initial value and capacitor's capacity initial value of inductance and capacitance
System, and inductance is determined according to the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value
With the total surplus energy-minimum of capacitance and switching frequency initial value and the relation of duty cycle；
1st, the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value is as the following formula
It determines：
Wherein, WrAt the beginning of representing that the total surplus energy of inductance and capacitance, L represent that inductance inductance value initial value, C represent capacitor's capacity
Initial value.
2nd, local derviation is asked respectively to the L in formula (3) and C, obtains WrObtain minimum conditions：According toAnd
According to the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value, obtain such as following formula
The total surplus energy-minimum of inductance and capacitance and switching frequency initial value and the relation of duty cycle：
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, Δ V% tables
Show ripple factor.
S103：According to the total surplus energy-minimum of the obtained inductance of S102 and capacitance and switching frequency initial value and duty
The relation of ratio determines inductance inductance value initial value and capacitor's capacity initial value, and judges that inductance inductance value initial value and capacitor's capacity are initial
Whether value meets intrinsic safety requirements, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value point
Inductance inductance value, capacitor's capacity and switching frequency that Wei be not final；Otherwise according to inductance inductance value initial value and capacitor's capacity initial value
It determines final switching frequency, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtains
To final inductance inductance value and capacitor's capacity.
Due toAndThen inductance inductance value initial value can be with
ForCapacitor's capacity initial value can be
Since integral energy constraints is Wrmin＜ Wmin, WminRepresent the total surplus energy setting value of inductance and capacitance,
According toAnd Wrmin＜ WminIt obtainsThen understand
According toAndInductance inductance value initial value can beElectricity
Holding capacitance initial value can beIn view of above-mentioned two aspect, inductance inductance value initial value and capacitor's capacity initial value are true as the following formula
It is fixed：
Wherein, WminDifferent values is selected according to explosive gas atmosphere, is 525 μ J for I kind equipments, is set for IIA classes
Standby is 320 μ J, is 160 μ J for IIB kind equipments, is 40 μ J for IIC kind equipments.
Above-mentioned judges whether inductance inductance value initial value and capacitor's capacity initial value meet intrinsic safety requirements, detailed process
It is as follows：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum searched respectively in GB3836.4-2010 is lighted
Current curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity
Initial value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, and k can use 1.5 or 2 by GB3836.4-2010；I1It represents
The corresponding electric current of minimun burning current curves in GB3836.4-2010, V1Represent that the minimum in GB3836.4-2010 lights electricity
The corresponding voltage of line of buckling.
Above-mentioned determines final switching frequency according to inductance inductance value initial value and capacitor's capacity initial value, and detailed process is such as
Under：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is most at this time
Whole switching frequency.
Based on same inventive concept, the embodiment of the present invention also provides a kind of parameter determining device of Buck circuits, including electricity
Source E, switching tube S, diode D1, inductance L, capacitance C and resistance R；Power supply E, switching tube S, inductance L and resistance R are sequentially connected in series, and two
The cathode of pole pipe D1 is connected between switching tube S and inductance L, and anode is connected between resistance R and power supply E, and capacitance C one end connects
It is connected between inductance L and resistance R, the other end is connected between resistance R and power supply E；Buck circuits provided in an embodiment of the present invention
Parameter determining device include computing module, determining module and judgment module, separately below to the function of above three module into
Row is discussed in detail：
Computing module therein for determining switching frequency initial value according to ripple factor, and calculates the duty of switching tube
Than and resistance；
Determining module therein, for determining that the total surplus energy of inductance and capacitance holds with inductance inductance value initial value and capacitance
It is worth the relation of initial value, and according to the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value
Relation determines inductance and the total surplus energy-minimum of capacitance and switching frequency initial value and the relation of duty cycle；
Judgment module therein, for the total surplus energy-minimum according to inductance and capacitance and switching frequency initial value and
The relation of duty cycle determines inductance inductance value initial value and capacitor's capacity initial value, and judges inductance inductance value initial value and capacitor's capacity
Whether initial value meets intrinsic safety requirements, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency are initial
Value is respectively final inductance inductance value, capacitor's capacity and switching frequency；Otherwise according at the beginning of inductance inductance value initial value and capacitor's capacity
Initial value determines final switching frequency, and initial according to final switching frequency update inductance inductance value initial value and capacitor's capacity
Value, obtains final inductance inductance value and capacitor's capacity.
Duty cycle is calculated as follows in above-mentioned computing module：
Wherein, D represents duty cycle, VORepresent output voltage, ViRepresent input voltage.
Resistance is calculated as follows in above-mentioned computing module：
Wherein, R represents resistance, IoRepresent load current.
Above-mentioned determining module includes the first determination unit and the second determination unit, specific as follows：
1st, the first determination unit determines the total surplus energy and inductance inductance value initial value and capacitance of inductance and capacitance as the following formula
The relation of capacitance initial value：
Wherein, WrAt the beginning of representing that the total surplus energy of inductance and capacitance, L represent that inductance inductance value initial value, C represent capacitor's capacity
Initial value.
2nd, the second determination unit is according at the beginning of inductance and the total surplus energy of capacitance and inductance inductance value initial value and capacitor's capacity
The relation of initial value determines inductance and the total surplus energy-minimum of capacitance and switching frequency initial value and the pass of duty cycle as the following formula
System：
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, Δ V% tables
Show ripple factor.
Above-mentioned judgment module includes the 3rd determination unit and judging unit, specific as follows：
1st, the 3rd determination unit is according to the total surplus energy-minimum and switching frequency initial value and duty of inductance and capacitance
The relation of ratio determines inductance inductance value initial value and capacitor's capacity initial value as the following formula：
Wherein, WminRepresent the total surplus energy setting value of inductance and capacitance.
2nd, judging unit judges whether inductance inductance value initial value and capacitor's capacity initial value meet essence according to following processes
Safety requirements：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum searched respectively in GB3836.4-2010 is lighted
Current curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity
Initial value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, I1Represent that the minimum in GB3836.4-2010 lights electricity
The corresponding electric current of flow curve, V1Represent that the minimum in GB3836.4-2010 lights the corresponding voltage of voltage curve.
If the 3rd,WithAsynchronously meet, above-mentioned judgment module further includes the 4th determination unit, and the 4th determines
Unit determines final switching frequency according to following processes according to inductance inductance value initial value and capacitor's capacity initial value：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is most at this time
Whole switching frequency.
For convenience of description, each several part of apparatus described above is divided into various modules with function or unit describes respectively.
Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the application
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the application
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention specific embodiment modify or
Equivalent substitution, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent substitution
Within bright claims.
Claims (16)
1. a kind of parameter determination method of Buck circuits, the Buck circuits include power supply, switching tube, diode, inductance, capacitance
And resistance；The power supply, switching tube, inductance and resistance are sequentially connected in series, and the cathode of the diode is connected to switching tube and inductance
Between, anode is connected between resistance and power supply, and described capacitance one end is connected between inductance and resistance, and the other end is connected to
Between resistance and power supply；It is characterized in that, the definite method includes：
Switching frequency initial value is determined according to ripple factor, and calculates the duty cycle and resistance of switching tube；
Determine the relation of the total surplus energy and inductance inductance value initial value and capacitor's capacity initial value of inductance and capacitance, and according to electricity
Sense and the total surplus energy of capacitance and the relation of inductance inductance value initial value and capacitor's capacity initial value determine the total of inductance and capacitance
Dump energy minimum value and switching frequency initial value and the relation of duty cycle；
Inductance sense is determined according to the relation of the total surplus energy-minimum of inductance and capacitance and switching frequency initial value and duty cycle
It is worth initial value and capacitor's capacity initial value, and judges whether inductance inductance value initial value and capacitor's capacity initial value meet essential safety
It is required that if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value are respectively final inductance sense
Value, capacitor's capacity and switching frequency；Otherwise final switch frequency is determined according to inductance inductance value initial value and capacitor's capacity initial value
Rate, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain final inductance inductance value
And capacitor's capacity.
2. the parameter determination method of Buck circuits according to claim 1, which is characterized in that the duty cycle is counted as the following formula
It calculates：
<mrow>
<mi>D</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>V</mi>
<mi>o</mi>
</msub>
<msub>
<mi>V</mi>
<mi>i</mi>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, D represents duty cycle, VORepresent output voltage, ViRepresent input voltage.
3. the parameter determination method of Buck circuits according to claim 2, which is characterized in that the resistance is as the following formula
It calculates：
<mrow>
<mi>R</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>V</mi>
<mi>o</mi>
</msub>
<msub>
<mi>I</mi>
<mi>o</mi>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, R represents resistance, IoRepresent load current.
4. the parameter determination method of Buck circuits according to claim 3, which is characterized in that the inductance and capacitance it is total
Dump energy determines as the following formula with the relation of inductance inductance value initial value and capacitor's capacity initial value：
<mrow>
<msub>
<mi>W</mi>
<mi>r</mi>
</msub>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<msubsup>
<mi>LI</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mo>+</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<msubsup>
<mi>CV</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WrRepresent the total surplus energy of inductance and capacitance, L represents inductance inductance value initial value, and C represents capacitor's capacity initial value.
5. the parameter determination method of Buck circuits according to claim 4, which is characterized in that according to the total of inductance and capacitance
Dump energy and the relation of inductance inductance value initial value and capacitor's capacity initial value determine the total surplus energy of inductance and capacitance as the following formula
Measure minimum value and switching frequency initial value and the relation of duty cycle：
<mrow>
<msub>
<mi>W</mi>
<mrow>
<mi>r</mi>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mrow>
<mn>4</mn>
<mi>R</mi>
<mo>&times;</mo>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, and Δ V% represents line
Wave system number.
6. the parameter determination method of Buck circuits according to claim 5, which is characterized in that according to the total of inductance and capacitance
Dump energy minimum value and switching frequency initial value and the relation of duty cycle determine that inductance inductance value initial value and capacitance hold as the following formula
It is worth initial value：
<mrow>
<mi>L</mi>
<mo>=</mo>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mo>{</mo>
<mfrac>
<mi>R</mi>
<mrow>
<mn>4</mn>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>,</mo>
<msup>
<mi>R</mi>
<mn>2</mn>
</msup>
<mo>&times;</mo>
<mfrac>
<msub>
<mi>W</mi>
<mi>min</mi>
</msub>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
</mfrac>
<mo>}</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>C</mi>
<mo>=</mo>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mo>{</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>4</mn>
<mi>R</mi>
<mo>&times;</mo>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>,</mo>
<mfrac>
<msub>
<mi>W</mi>
<mrow>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
</mfrac>
<mo>}</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WminRepresent the total surplus energy setting value of inductance and capacitance.
7. the parameter determination method of Buck circuits according to claim 6, which is characterized in that at the beginning of the judgement inductance inductance value
Whether initial value and capacitor's capacity initial value meet intrinsic safety requirements, including：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum ignition current in GB3836.4-2010 is searched respectively
Curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity are initial
Value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, I1Represent that the minimum ignition current in GB3836.4-2010 is bent
The corresponding electric current of line, V1Represent that the minimum in GB3836.4-2010 lights the corresponding voltage of voltage curve.
8. the parameter determination method of Buck circuits according to claim 7, which is characterized in that at the beginning of the inductance value according to inductance
Initial value and capacitor's capacity initial value determine final switching frequency, including：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is opened for final at this time
Close frequency.
9. a kind of parameter determining device of Buck circuits, the Buck circuits include power supply, switching tube, diode, inductance, capacitance
And resistance；The power supply, switching tube, inductance and resistance are sequentially connected in series, and the cathode of the diode is connected to switching tube and inductance
Between, anode is connected between resistance and power supply, and described capacitance one end is connected between inductance and resistance, and the other end is connected to
Between resistance and power supply；It is characterized in that, the determining device includes：
Computing module for determining switching frequency initial value according to ripple factor, and calculates the duty cycle of switching tube and resistance resistance
Value；
Determining module, for determining the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value
Relation, and electricity is determined according to the relation of the total surplus energy of inductance and capacitance and inductance inductance value initial value and capacitor's capacity initial value
The total surplus energy-minimum of sense and capacitance and switching frequency initial value and the relation of duty cycle；
Judgment module, for the total surplus energy-minimum according to inductance and capacitance and switching frequency initial value and the pass of duty cycle
System determines inductance inductance value initial value and capacitor's capacity initial value, and judges whether are inductance inductance value initial value and capacitor's capacity initial value
Meet intrinsic safety requirements, if satisfied, inductance inductance value initial value, capacitor's capacity initial value and switching frequency initial value are respectively most
Whole inductance inductance value, capacitor's capacity and switching frequency；Otherwise determined most according to inductance inductance value initial value and capacitor's capacity initial value
Whole switching frequency, and according to final switching frequency update inductance inductance value initial value and capacitor's capacity initial value, obtain final
Inductance inductance value and capacitor's capacity.
10. the parameter determining device of Buck circuits according to claim 9, which is characterized in that the computing module is pressed
Formula calculates duty cycle：
<mrow>
<mi>D</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>V</mi>
<mi>o</mi>
</msub>
<msub>
<mi>V</mi>
<mi>i</mi>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, D represents duty cycle, VORepresent output voltage, ViRepresent input voltage.
11. the parameter determining device of Buck circuits according to claim 10, which is characterized in that the computing module is pressed
Formula calculates resistance：
<mrow>
<mi>R</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>V</mi>
<mi>o</mi>
</msub>
<msub>
<mi>I</mi>
<mi>o</mi>
</msub>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, R represents resistance, IoRepresent load current.
12. the parameter determining device of Buck circuits according to claim 11, which is characterized in that the determining module includes
First determination unit, first determination unit determine inductance and the total surplus energy of capacitance and inductance inductance value initial value as the following formula
With the relation of capacitor's capacity initial value：
<mrow>
<msub>
<mi>W</mi>
<mi>r</mi>
</msub>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<msubsup>
<mi>LI</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mo>+</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<msubsup>
<mi>CV</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>3</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WrRepresent the total surplus energy of inductance and capacitance, L represents inductance inductance value initial value, and C represents capacitor's capacity initial value.
13. the parameter determining device of Buck circuits according to claim 12, which is characterized in that the determining module is also wrapped
The second determination unit is included, second determination unit is according to the total surplus energy of inductance and capacitance and inductance inductance value initial value and electricity
Hold the relation of capacitance initial value, determine the total surplus energy-minimum of inductance and capacitance and switching frequency initial value as the following formula and account for
The relation of empty ratio：
<mrow>
<msub>
<mi>W</mi>
<mrow>
<mi>r</mi>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
<mrow>
<mn>4</mn>
<mi>R</mi>
<mo>&times;</mo>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WrminRepresent the total surplus energy-minimum of inductance and capacitance, f represents switching frequency initial value, and Δ V% represents line
Wave system number.
14. the parameter determining device of Buck circuits according to claim 13, which is characterized in that the judgment module includes
3rd determination unit, the 3rd determination unit is according to the total surplus energy-minimum of inductance and capacitance and switching frequency initial value
With the relation of duty cycle, inductance inductance value initial value and capacitor's capacity initial value are determined as the following formula：
<mrow>
<mi>L</mi>
<mo>=</mo>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mo>{</mo>
<mfrac>
<mi>R</mi>
<mrow>
<mn>4</mn>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>,</mo>
<msup>
<mi>R</mi>
<mn>2</mn>
</msup>
<mo>&times;</mo>
<mfrac>
<msub>
<mi>W</mi>
<mi>min</mi>
</msub>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
</mfrac>
<mo>}</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>C</mi>
<mo>=</mo>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mo>{</mo>
<mfrac>
<mn>1</mn>
<mrow>
<mn>4</mn>
<mi>R</mi>
<mo>&times;</mo>
<mi>f</mi>
</mrow>
</mfrac>
<msqrt>
<mfrac>
<mrow>
<mn>2</mn>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>D</mi>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>&Delta;</mi>
<mi>V</mi>
<mi>%</mi>
</mrow>
</mfrac>
</msqrt>
<mo>,</mo>
<mfrac>
<msub>
<mi>W</mi>
<mrow>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
</mrow>
</msub>
<msubsup>
<mi>V</mi>
<mi>o</mi>
<mn>2</mn>
</msubsup>
</mfrac>
<mo>}</mo>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>6</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, WminRepresent the total surplus energy setting value of inductance and capacitance.
15. the parameter determining device of Buck circuits according to claim 14, which is characterized in that the judgment module also wraps
Judging unit is included, the judging unit judges whether inductance inductance value initial value and capacitor's capacity initial value meet according to following processes
Intrinsic safety requirements：
According to inductance inductance value initial value and capacitor's capacity initial value, the minimum ignition current in GB3836.4-2010 is searched respectively
Curve and minimum light voltage curve, if meeting simultaneouslyWithInductance inductance value initial value and capacitor's capacity are initial
Value is satisfied by intrinsic safety requirements；Wherein k represents safety coefficient, I1Represent that the minimum ignition current in GB3836.4-2010 is bent
The corresponding electric current of line, V1Represent that the minimum in GB3836.4-2010 lights the corresponding voltage of voltage curve.
16. the parameter determining device of Buck circuits according to claim 15, which is characterized in that the judgment module also wraps
The 4th determination unit is included, the 4th determination unit is according to inductance inductance value initial value and capacitor's capacity initial value, according to following mistakes
Journey determines final switching frequency：
Increase switching frequency initial value, until meeting simultaneouslyWithCorresponding switching frequency is opened for final at this time
Close frequency.
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| CN103928911A (en) * | 2014-04-25 | 2014-07-16 | 西安科技大学 | Short-circuited inductance energy bypass circuit of intrinsic safety Boost converter |
| CN103973124A (en) * | 2014-05-15 | 2014-08-06 | 广州市特种机电设备检测研究院 | Method for designing intrinsic safety type quasi-resonance flyback converter |
| CN104539158A (en) * | 2014-12-17 | 2015-04-22 | 中国矿业大学盱眙矿山装备与材料研发中心 | Method for designing output intrinsic safety type LLC resonant converter |
| US20160241039A1 (en) * | 2015-02-18 | 2016-08-18 | Cyboenergy, Inc. | Smart Microgrids and Dual-Output Off-Grid Power Inverters with DC Source Flexibility |
| CN107332210A (en) * | 2017-06-05 | 2017-11-07 | 北方工业大学 | Processing method for obtaining intrinsic safety equivalent inductance |
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2017
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| CN103928911A (en) * | 2014-04-25 | 2014-07-16 | 西安科技大学 | Short-circuited inductance energy bypass circuit of intrinsic safety Boost converter |
| CN103973124A (en) * | 2014-05-15 | 2014-08-06 | 广州市特种机电设备检测研究院 | Method for designing intrinsic safety type quasi-resonance flyback converter |
| CN104539158A (en) * | 2014-12-17 | 2015-04-22 | 中国矿业大学盱眙矿山装备与材料研发中心 | Method for designing output intrinsic safety type LLC resonant converter |
| US20160241039A1 (en) * | 2015-02-18 | 2016-08-18 | Cyboenergy, Inc. | Smart Microgrids and Dual-Output Off-Grid Power Inverters with DC Source Flexibility |
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