CN106655789A - Isolated DC-DC converter and control method and system thereof - Google Patents
Isolated DC-DC converter and control method and system thereof Download PDFInfo
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- CN106655789A CN106655789A CN201710025887.3A CN201710025887A CN106655789A CN 106655789 A CN106655789 A CN 106655789A CN 201710025887 A CN201710025887 A CN 201710025887A CN 106655789 A CN106655789 A CN 106655789A
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- converter
- transformer
- isolation type
- resistance
- output voltage
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Classifications
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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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
The invention discloses an isolated DC-DC converter and a control method and system thereof. The control method comprises the steps that a PWM driving signal used for driving all power switch tubes in a transformer primary-side circuit of the isolated DC-DC converter is generated and output; a transformer secondary-side coil output voltage waveform of the isolated DC-DC converter is acquired; whether the acquired transformer secondary-side coil output voltage waveform is consistent with a reference waveform or not is judged, wherein the reference waveform is a transformer secondary-side coil output voltage waveform obtained when the PWM driving signal is generated and output under the condition that wiring of transformer dotted terminals of the isolated DC-DC converter is correct; and if the acquired transformer secondary-side coil output voltage waveform is not consistent with the reference waveform, it is determined that the transformer dotted terminals of the isolated DC-DC converter are wrongly wired, and therefore whether the transformer dotted terminals of the isolated DC-DC converter are wrongly wired or not is distinguished.
Description
Technical field
The present invention relates to electric and electronic technical field, more particularly, it relates to isolation type DC-DC converter and its controlling party
Method and control system.
Background technology
Isolated form DC/DC converters are in electric automobile, energy-storage system, renewable energy power generation and superconductive energy storage system etc.
Field has broad application prospects.In order to pursue efficiently, isolated form DC/DC converters are in use, often use synchronous rectification skill
Art.But when there is the problem of transformer Same Name of Ends wrong line in the isolated form DC/DC converters under working in synchronous rectification pattern,
Aircraft bombing risk can occur.
The content of the invention
In view of this, the invention provides isolation type DC-DC converter and its control method and control system, with distinguish every
Problem of the release DC-DC converter with the presence or absence of transformer Same Name of Ends wrong line.
A kind of isolation type DC-DC converter control method, including：
Each power switch pipe in generating and export for driving the transformer primary side circuit of isolation type DC-DC converter
PWM drive signal；
Obtain the secondary transformer output voltage waveforms of the isolation type DC-DC converter；
Whether the secondary transformer output voltage waveforms that judgement gets are consistent with reference waveform；Wherein, the ginseng
Examine waveform to refer in the case of the transformer terminated line of the same name of the isolation type DC-DC converter is correct, generate and export institute
State secondary transformer output voltage waveforms resulting during PWM drive signal；
If the secondary transformer output voltage waveforms for getting are inconsistent with the reference waveform, the isolation is judged
The transformer Same Name of Ends wrong line of type DC-DC converter.
Alternatively, after the transformer Same Name of Ends wrong line for judging the isolation type DC-DC converter, also include：
In transformer primary side circuit or transformer secondary circuit when the isolation type DC-DC converter is normally run
The PWM drive signal of each power switch pipe is negated.
Wherein, the secondary transformer output voltage waveforms for obtaining the isolation type DC-DC converter, including：
The secondary transformer output voltage of the isolation type DC-DC converter is sampled, nursed one's health and shaping.
A kind of isolation type DC-DC converter control system, including processor and acquisition circuit, wherein：
The acquisition circuit, for obtaining the secondary transformer output voltage ripple of the isolation type DC-DC converter
Shape；
The processor, for generating and exports for driving the transformer primary side circuit of isolation type DC-DC converter
Each power switch pipe PWM drive signal；Judge the secondary transformer output voltage ripple that the acquisition circuit gets
Whether shape is consistent with reference waveform；Wherein, the reference waveform refers to of the same name in the transformer of the isolation type DC-DC converter
In the case of terminated line is correct, secondary transformer output voltage resulting during the PWM drive signal is generated and exported
Waveform；If the secondary transformer output voltage waveforms for getting are inconsistent with reference waveform, the isolated form DC-DC is judged
The transformer Same Name of Ends wrong line of converter.
Alternatively, the processor is gone back after the transformer Same Name of Ends wrong line for judging the isolation type DC-DC converter
The each work(in transformer primary side circuit or transformer secondary circuit during for the isolation type DC-DC converter normally to be run
The PWM drive signal of rate switching tube is negated.
Wherein, the circuit that obtains is exported specifically for the secondary transformer to the isolation type DC-DC converter
Voltage is sampled, nursed one's health and shaping.
Wherein, the acquisition circuit includes：Over-sampling modulate circuit and signal transformation circuit, the signal transformation circuit is connected on
The output end of the over-sampling modulate circuit.
Wherein, the over-sampling modulate circuit is put including first resistor, second resistance, 3rd resistor, the 4th resistance and computing
Big device, specifically：
One end of the first resistor and the second resistance connect respectively the transformer secondary of isolation type DC-DC converter around
The two ends of group；The inverting input of another termination operational amplifier of the first resistor；The second resistance it is another
Terminate the in-phase input end of the operational amplifier；The 3rd resistor be connected to the in-phase input end of the operational amplifier with
Between first power supply；4th resistance is connected between the output end of the operational amplifier and inverting input；Described
One resistance is equal with the second resistance resistance, and the 3rd resistor is equal with the 4th resistance.
Wherein, the signal transformation circuit includes the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and comparator,
Specifically：
5th resistance connects the output end of the operational amplifier and the in-phase input end of the comparator；Described
Six resistance connect the inverting input and first power supply of the comparator；7th resistance connects the defeated of the comparator
Go out end and in-phase input end；8th resistance connects the output end and second source of the comparator.
A kind of isolation type DC-DC converter, including：Any one the isolation type DC-DC converter control being disclosed as above out
System.
It can be seen from above-mentioned technical scheme that, the present invention generates PWM drive signal and goes in driving transformer primary circuit
Each power switch pipe when, voltage is applied on primary coil, obtain induced voltage on secondary coil, and transformer termination of the same name
The secondary coil output voltage waveforms obtained during wrong line, the secondary coil output electricity obtained when correct with transformer terminated line of the same name
Corrugating be it is complementary, based on this, the present invention by by the secondary coil for actually obtaining output voltage waveforms with precalculate
To reference waveform compare, transformer Same Name of Ends whether wrong line is identified according to comparing result.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of isolation type DC-DC converter control method flow chart disclosed in the embodiment of the present invention；
Fig. 2 is a kind of isolation type DC-DC converter structural representation disclosed in prior art；
Fig. 3 is that a kind of phase-shift full-bridge high-frequency isolates bi-directional DC-DC topological structure schematic diagram disclosed in prior art；
Fig. 4 be disclosed in the embodiment of the present invention it is a kind of be applied to shown in Fig. 3 topology PWM drive signal and reference waveform when
Sequence figure；
Fig. 5 is a kind of isolation type DC-DC converter control system architecture schematic diagram disclosed in the embodiment of the present invention；
Fig. 6 is a kind of acquisition electrical block diagram disclosed in the embodiment of the present invention.
Specific 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 only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of isolation type DC-DC converter control method, to distinguish isolated form
DC-DC converter whether there is the problem of transformer Same Name of Ends wrong line, including：
Step S01：Before isolation type DC-DC converter normally runs, generate and export for driving the isolated form DC-
PWM (Pulse Width Modulation, the pulse width of each power switch pipe in the transformer primary side circuit of DC converters
Modulation) drive signal.
The PWM drive signal can be that the PWM that output is needed when isolation type DC-DC converter normally runs drives letter
Number；Can also be self-defining drive signal, only distinguish that Same Name of Ends is used.
Step S02：Obtain the secondary transformer output voltage waveforms of the isolation type DC-DC converter.
Wherein, the secondary transformer output voltage waveforms for obtaining the isolation type DC-DC converter, concrete bag
Include：The secondary transformer output voltage of the isolation type DC-DC converter is sampled, nursed one's health and shaping, to avoid
Same Name of Ends discrimination results are affected because of sampled signal distortion.
Step S03：Whether the secondary transformer output voltage waveforms that judgement gets are consistent with reference waveform, if obtaining
The secondary transformer output voltage waveforms got are inconsistent with the reference waveform, into step S04, otherwise, into step
Rapid S05.
Wherein, the reference waveform refers to correct in the transformer terminated line of the same name of the isolation type DC-DC converter
In the case of, generate and export secondary transformer output voltage waveforms resulting during the PWM drive signal.
Step S04：Judge the transformer Same Name of Ends wrong line of the isolation type DC-DC converter, finishing control.
Step S05：Judge that the transformer terminated line of the same name of the isolation type DC-DC converter is correct, finishing control.
Below, start with from the circuit structural analysis of isolation type DC-DC converter, technical scheme described in Fig. 1 is described in detail.
Referring to Fig. 2, isolation type DC-DC converter includes transformer T, transformer primary side circuit 100 and transformer secondary electricity
Road 200.Transformer T has a pair of coupling coils, is respectively primary coil LS1With secondary coil LS2, LS1On electric current i1And LS2
On electric current i2Referred to as inducing current.The end (or going out end) that enters of this pair of inducing currents is defined as into the coupling coil in engineering
Same Name of Ends, and mark this to terminal with a pair of symbols, a pair of terminal for for example being marked with " " number in Fig. 2 (1,2) be
The Same Name of Ends of the coupling coil, unlabelled a pair of terminal (1', 2') is also the Same Name of Ends of the coupling coil.Terminal 1,2'
Different name end each other, terminal 1', 2 different name ends each other.
Transformer T Same Name of Ends wrong lines, refer to should in transformer primary side circuit 100 and transformer secondary circuit 200
The terminal misconnection on a pair of Same Name of Ends is connected on a pair of different name ends.Driving transformer former limit is gone when PWM drive signal is generated
During each power switch pipe in circuit 100, primary coil LS1On be applied in voltage, secondary coil LS2Upper acquisition induced voltage, and
The secondary coil L obtained during transformer T Same Name of Ends wrong linesS2Output voltage waveforms, obtain when correct with transformer T terminated lines of the same name
The secondary coil L for arrivingS2Output voltage waveforms are complementary.
Based on this, the embodiment of the present invention first calculate transformer T terminated lines of the same name it is correct when, generate and export the PWM
The secondary coil L that should be obtained during drive signalS2Output voltage waveforms, as reference waveform；The PWM will be generated and exported again
The secondary coil L actually obtained during drive signalS2Output voltage waveforms are made comparisons with the reference waveform, if two waveforms are identical,
Then understand that transformer T terminated lines of the same name are correct；If two waveforms are different, transformer T Same Name of Ends wiring errors are understood.
Illustrate, Fig. 3 shows a kind of canonical topology of isolation type DC-DC converter, be phase-shift full-bridge high-frequency isolation
Bi-directional DC-DC topology, is described in detail below.
The transformer secondary circuit 200 of topology includes inductance L, electric capacity C shown in Fig. 31, electric capacity Cc, power switch tube S1, work(
Rate switching tube S2, power switch tube S3, power switch tube S4And power switch tube Sc, wherein：C1Anode Jing L meet ScElectric energy it is defeated
Go out end, C1Negative terminal Jing CcMeet ScElectrical energy inputs；S1Electric energy output end meet S3Electrical energy inputs；S2Electric energy output end
Meet S4Electrical energy inputs；S1And S2Electrical energy inputs meet ScElectric energy output end；S3And S4Electric energy output end meet C1It is negative
End.The transformer primary side circuit 100 of topology includes electric capacity C shown in Fig. 32, power switch tube S5, power switch tube S6, power switch
Pipe S7And power switch tube S8, wherein：S5Electric energy output end meet S7Electrical energy inputs；S6Electric energy output end meet S8Electric energy
Input；S5And S6Electrical energy inputs meet C2Anode；S7And S8Electric energy output end meet C2Negative terminal.Topology shown in Fig. 3
The primary coil L of transformer TS1Two bridge arm midpoints of connection transformer primary circuit 100, secondary coil LS2Connection transformer
Two bridge arm midpoints of secondary circuit 200.
When transformer T Same Name of Ends is distinguished, S is firstly generated and exported5～S8PWM drive signal, wherein：S5With S8's
PWM drive signal first half cycle be high level, the later half cycle be low level；S6With S7PWM drive signal and S5PWM drive
Dynamic signal is complementary.If primary coil LS1In meet S6The terminal at place bridge arm midpoint, with secondary coil LS2In meet S1In the bridge arm of place
The terminal of point is a pair of Same Name of Ends (as shown in Figure 3), then reference waveform UTShow as first half cycle is for low level, later half cycle
High level.Based on this, if the secondary coil L for actually gettingS2Output voltage waveforms and UTIt is identical, illustrate transformer T Same Name of Ends
Wiring is correct, otherwise then illustrates wiring error.
In the case of judging that transformer T terminated lines of the same name are correct, the normal operation of topology shown in control based on direct control chart 3.
In the case where transformer T Same Name of Ends wrong lines are judged, transformer T terminated lines of the same name can be manually adjusted, can be by shown in Fig. 3
The PWM drive signal of each power switch pipe in transformer primary side circuit 100 during topological normal operation is negated, it is also possible to will be become
The PWM drive signal of each power switch pipe in depressor secondary circuit 200 is negated.
From the foregoing, it will be observed that each power that embodiment of the present invention generation PWM drive signal is gone in driving transformer primary circuit is opened
When closing pipe, voltage is applied on primary coil, induced voltage is obtained on secondary coil, and obtained during transformer Same Name of Ends wrong line
Secondary coil output voltage waveforms, the secondary coil output voltage waveforms obtained when correct with transformer terminated line of the same name are mutual
Mend, based on this, the embodiment of the present invention by by the secondary coil for actually obtaining output voltage waveforms with precalculate what is obtained
Reference waveform is compared, and transformer Same Name of Ends whether wrong line is identified according to comparing result.
Referring to Fig. 5, the embodiment of the invention discloses a kind of isolation type DC-DC converter control system, including processor 100
With obtain circuit 200, wherein：
Circuit 200 is obtained, for obtaining the secondary transformer output voltage ripple of the isolation type DC-DC converter
Shape；
Processor 100, for generating and exports for driving the transformer primary side circuit of isolation type DC-DC converter
The PWM drive signal of each power switch pipe；Judge to obtain the secondary transformer output voltage waveforms that get of circuit 200 with
Whether reference waveform is consistent；Wherein, the reference waveform refers to the transformer termination of the same name in the isolation type DC-DC converter
In the case of line is correct, secondary transformer output voltage waveforms resulting during the PWM drive signal are generated and exported；
If the secondary transformer output voltage waveforms for getting are inconsistent with reference waveform, the isolated form DC-DC conversion is judged
The transformer Same Name of Ends wrong line of device.
Alternatively, processor 100 is gone back after the transformer Same Name of Ends wrong line for judging the isolation type DC-DC converter
The each work(in transformer primary side circuit or transformer secondary circuit during for the isolation type DC-DC converter normally to be run
The PWM drive signal of rate switching tube is negated.
Wherein, circuit 200 is obtained specifically for the secondary transformer output electricity to the isolation type DC-DC converter
Pressure is sampled, is nursed one's health and shaping.
Wherein, obtaining circuit 200 includes：Over-sampling modulate circuit and signal transformation circuit, the signal transformation circuit is connected on
The output end of the over-sampling modulate circuit.
Specifically, referring to Fig. 6, the over-sampling modulate circuit includes first resistor R1, second resistance R2, 3rd resistor R3,
Four resistance R4With operational amplifier U1, wherein：First resistor R1With second resistance R2One end meet vice-side winding L respectivelyS2Two
End；First resistor R1Another termination operational amplifier U1Inverting input；Second resistance R2Another termination operational amplifier
U1In-phase input end；3rd resistor R3It is connected to operational amplifier U1In-phase input end and the first power supply (as+1.5V power supplys)
Between；4th resistance R4It is connected on operational amplifier U1Output end and inverting input between；First resistor R1With second resistance R2
Resistance is equal, 3rd resistor R3With the 4th resistance R4Resistance is equal.
Referring also to Fig. 6, the signal transformation circuit includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, it is the 8th electric
Resistance R8With comparator U2, wherein：5th resistance R5Concatenation operation amplifier U1Output end and comparator U2In-phase input end；The
Six resistance R6Connection comparator U2Inverting input and first power supply；7th resistance R7Connection comparator U2Output end
With in-phase input end；8th resistance R8Connection comparator U2Output end and second source (such as+3.3V power supplys).
Obtain circuit 200 shown in Fig. 6 to nurse one's health, be shaped as level the sampled signal that level is+1 → -1 →+1 → -1
For+2 → 0 →+2 → 0 signal output.
Additionally, the embodiment of the invention also discloses a kind of isolation type DC-DC converter, including：It is as disclosed above arbitrary
Plant isolation type DC-DC converter control system.
In sum, when the present invention generates each power switch pipe that PWM drive signal is gone in driving transformer primary circuit,
Voltage is applied on primary coil, induced voltage is obtained on secondary coil, and the secondary obtained during transformer Same Name of Ends wrong line
Coil output voltage waveform, the secondary coil output voltage waveforms obtained when correct with transformer terminated line of the same name be it is complementary,
Based on this, the present invention is by the way that the secondary coil for actually obtaining output voltage waveforms are opposed with the reference waveform for obtaining is precalculated
Than identifying transformer Same Name of Ends whether wrong line according to comparing result.
In addition it should be noted that each power switch in the transformer primary side circuit of the isolation type DC-DC converter
Pipe can be MOSFET (Metal Oxide Semiconductor FET, mos field effect transistor),
Can be IGBT (Insulated Gate Bipolar Transistor, igbt)；Transformer secondary circuit
In each power switch pipe be MOSFET.When certain power switch pipe is MOSFET, the electrical energy inputs of the power switch pipe are
The drain electrode of MOSFET, the electric energy output end of the power switch pipe is the source electrode of MOSFET, and the control end of the power switch pipe is
The grid of MOSFET.When certain power switch pipe is IGBT, the electrical energy inputs of the power switch pipe are the colelctor electrode of IGBT, are somebody's turn to do
The electric energy output end of power switch pipe is the emitter stage of IGBT, and the control end of the power switch pipe is the grid of IGBT.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For isolation disclosed in embodiment
It is relative with isolation type DC-DC converter control method disclosed in embodiment due to it for type DC-DC converter control system
Should, so description is fairly simple, related part is referring to method part illustration.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can in other embodiments be realized in the case of the spirit or scope without departing from the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent most wide scope of features of novelty.
Claims (10)
1. a kind of isolation type DC-DC converter control method, it is characterised in that include：
The PWM of each power switch pipe in generating and export for driving the transformer primary side circuit of isolation type DC-DC converter
Drive signal；
Obtain the secondary transformer output voltage waveforms of the isolation type DC-DC converter；
Whether the secondary transformer output voltage waveforms that judgement gets are consistent with reference waveform；Wherein, the reference wave
Shape referred in the case of the transformer terminated line of the same name of the isolation type DC-DC converter is correct, generates and export the PWM
Secondary transformer output voltage waveforms resulting during drive signal；
If the secondary transformer output voltage waveforms for getting are inconsistent with the reference waveform, the isolated form is judged
The transformer Same Name of Ends wrong line of DC-DC converter.
2. isolation type DC-DC converter control method according to claim 1, it is characterised in that described in the judgement every
After the transformer Same Name of Ends wrong line of release DC-DC converter, also include：
The each work(in transformer primary side circuit or transformer secondary circuit when the isolation type DC-DC converter is normally run
The PWM drive signal of rate switching tube is negated.
3. isolation type DC-DC converter control method according to claim 1, it is characterised in that described in the acquisition every
The secondary transformer output voltage waveforms of release DC-DC converter, including：
The secondary transformer output voltage of the isolation type DC-DC converter is sampled, nursed one's health and shaping.
4. a kind of isolation type DC-DC converter control system, it is characterised in that including processor and obtain circuit, wherein：
The acquisition circuit, for obtaining the secondary transformer output voltage waveforms of the isolation type DC-DC converter；
The processor, it is for generating and each in exporting for driving the transformer primary side circuit of isolation type DC-DC converter
The PWM drive signal of power switch pipe；Judge the secondary transformer output voltage waveforms that get of acquisition circuit with
Whether reference waveform is consistent；Wherein, the reference waveform refers to the transformer termination of the same name in the isolation type DC-DC converter
In the case of line is correct, secondary transformer output voltage waveforms resulting during the PWM drive signal are generated and exported；
If the secondary transformer output voltage waveforms for getting are inconsistent with reference waveform, the isolated form DC-DC conversion is judged
The transformer Same Name of Ends wrong line of device.
5. isolation type DC-DC converter control system according to claim 4, it is characterised in that the processor is being sentenced
After the transformer Same Name of Ends wrong line of the fixed isolation type DC-DC converter, it is additionally operable to the isolation type DC-DC converter just
Often the PWM drive signal of each power switch pipe in the transformer primary side circuit or transformer secondary circuit during operation is negated.
6. isolation type DC-DC converter control system according to claim 4, it is characterised in that the acquisition circuit tool
Body is used to that the secondary transformer output voltage of the isolation type DC-DC converter to be sampled, nursed one's health and shaping.
7. isolation type DC-DC converter control system according to claim 6, it is characterised in that the acquisition circuit bag
Include：Over-sampling modulate circuit and signal transformation circuit, wherein, the signal transformation circuit is connected on the output of the over-sampling modulate circuit
End.
8. isolation type DC-DC converter control system according to claim 7, it is characterised in that the sampling conditioning electricity
Road includes first resistor, second resistance, 3rd resistor, the 4th resistance and operational amplifier, wherein：
One end of the first resistor and the second resistance connects respectively the transformer secondary winding of isolation type DC-DC converter
Two ends；The inverting input of another termination operational amplifier of the first resistor；Another termination of the second resistance
The in-phase input end of the operational amplifier；The 3rd resistor is connected to the in-phase input end of the operational amplifier and first
Between power supply；4th resistance is connected between the output end of the operational amplifier and inverting input；Described first is electric
Resistance is equal with the second resistance resistance, and the 3rd resistor is equal with the 4th resistance.
9. isolation type DC-DC converter control system according to claim 8, it is characterised in that the signal shaping electricity
Road includes the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and comparator, wherein：
5th resistance connects the output end of the operational amplifier and the in-phase input end of the comparator；Described 6th is electric
The inverting input and first power supply of the resistance connection comparator；7th resistance connects the output end of the comparator
With in-phase input end；8th resistance connects the output end and second source of the comparator.
10. a kind of isolation type DC-DC converter, it is characterised in that include：Isolation as any one of claim 4-9
Type DC-DC converter control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710025887.3A CN106655789B (en) | 2017-01-13 | 2017-01-13 | Isolation type DC-DC converter and its control method and control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710025887.3A CN106655789B (en) | 2017-01-13 | 2017-01-13 | Isolation type DC-DC converter and its control method and control system |
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| CN106655789B CN106655789B (en) | 2019-05-31 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202204904U (en) * | 2011-09-09 | 2012-04-25 | 中节能(宿迁)生物质能发电有限公司 | Three-phase motor dotted terminal detector |
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| CN106655789B (en) | 2019-05-31 |
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