CN106685191B - A kind of multi-mode control method and device - Google Patents
A kind of multi-mode control method and device Download PDFInfo
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- CN106685191B CN106685191B CN201710183775.0A CN201710183775A CN106685191B CN 106685191 B CN106685191 B CN 106685191B CN 201710183775 A CN201710183775 A CN 201710183775A CN 106685191 B CN106685191 B CN 106685191B
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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
- H02M1/00—Details of apparatus for conversion
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M3/145—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 using devices of a triode or transistor type requiring continuous application of a control signal
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
This application discloses a kind of multi-mode control method and devices, this method comprises: determining the current operating mode of controlled circuit；Wherein, multiple-working mode is set for controlled circuit in advance, the operation areas of different working modes turns to target to meet controlled circuit best performance and divided, and the condition switched between different working modes is determined according to the boundary value of each operation area；Determine the current operating status of controlled circuit；According to the current operating status of controlled circuit, judge whether controlled circuit meets the condition that another operating mode is switched to from current operating mode；If satisfied, control controlled circuit is switched to another operating mode from current operating mode, to improve power electronic circuit to the adaptability of complicated applications occasion.
Description
Technical field
The present invention relates to power electronics fields, more specifically to a kind of multi-mode control method and device.
Background technique
With the complication of power electronic technique application, the traditional operating mode of some power electronic circuit can not
Meet current work requirements.
For example, bridge-type Buck-Boost circuit topological structure as shown in Figure 1, be considered as Buck half-bridge and
The cascade of Boost half-bridge, specific: S1 and S2 is the top tube and down tube of Buck half-bridge, S4 and S3 be Boost half-bridge upper tube and
Down tube, L1 are the public inductance of two half-bridges.Bridge-type Buck-Boost circuit is usually operated at the top tube and down tube of same half-bridge
Alternate conduction, under the mode that the top tube and down tube of different half-bridges simultaneously turn on, its working principle is that: during S1 and S3 is connected,
Input voltage is added on inductance L1, and inductive current rises inductive energy storage；During S2 and S4 is connected, output voltage is added in inductance L1
On, inductive current decline inductance releases energy.This operating mode is very simple, but establishes in inductance L1 each switch week
Phase elder generation's energy storage realizes that the ripple current of inductance is very big on the basis of releasing energy again, cause excessive core loss and lead
Logical loss, while the pressure filtered is also larger.Further, since each period switch of S1~S4 is primary, switch damage is also resulted in
It consumes larger.As it can be seen that bridge-type Buck-Boost circuit is run under this traditional operating mode will cause inefficiency, it can not
Meet the work requirements of the occasion more demanding to circuit efficiency.
Summary of the invention
In view of this, the present invention provides a kind of multi-mode control method and device, to improve power electronic circuit to complexity
The adaptability of application.
A kind of multi-mode control method, comprising:
Determine the current operating mode of controlled circuit；Wherein, multiple-working mode, different works are set for controlled circuit in advance
The operation area of operation mode turns to target to meet controlled circuit best performance and is divided, the item switched between different working modes
Part is determined according to the boundary value of each operation area；
Determine the current operating status of controlled circuit；
According to the current operating status of controlled circuit, judges whether controlled circuit meets from current operating mode and be switched to
The condition of another operating mode；
If satisfied, control controlled circuit is switched to another operating mode from current operating mode.
Wherein, the controlled circuit is bridge-type Buck-Boost circuit.
Wherein, described to meet controlled circuit Performance optimization, comprising: to reach the bridge-type Buck-Boost circuit most
High efficiency.
Wherein, the bridge-type Buck-Boost circuit has Buck mode, boost mode and three kinds of direct mode operation work
Mode, specific:
The Buck mode, refers to S1 and S2 alternate conduction, S3 normal off, and it is pre- to be greater than first in the duty ratio of S1 for S4 normal open
If when value, the state of switching frequency is reduced with the increase of S1 duty ratio；
The boost mode, refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, pre- less than second in the duty ratio of S3
If when value, the state of switching frequency is reduced with the reduction of S3 duty ratio；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are described
The top tube and down tube of Boost half-bridge in bridge-type Buck-Boost circuit.
Corresponding, the condition switched between the different working modes is determined according to the boundary value of each operation area, packet
It includes:
Controlled circuit works in buck mode, when the duty ratio of S1 increases to third preset value or switching frequency is reduced to
When four preset values, into direct mode operation；
Controlled circuit works in boost mode, reduces when the duty ratio of S3 is decreased to the 5th preset value or switching frequency
When to six preset values, into direct mode operation；
Into after direct mode operation, enter buck or boost mode when detecting that input voltage variable quantity is more than certain value.
Alternatively, the bridge-type Buck-Boost circuit have Buck-boost mode, Buck mode, boost mode and
Four kinds of operating modes of direct mode operation, specific:
The Buck-boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction,
The state of switching frequency is reduced with the increase of S1 duty ratio；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, the state of S4 normal open；
The boost mode refers to S1 normal open, S2 normal off, the state of S3 and S4 alternate conduction；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are described
The top tube and down tube of Boost half-bridge in bridge-type Buck-Boost circuit.
Corresponding, the condition switched between the different working modes is determined according to the boundary value of each operation area, packet
It includes:
Controlled circuit works in buck mode, when the duty ratio of S1 is greater than the first preset value, into Buck-Boost
Mode, when the duty ratio of S1 increases to the second preset value or switching frequency is reduced to third preset value, into direct mode operation；
Controlled circuit works in Boost mode, when the duty ratio of S3 is less than four preset values, into Buck-Boost
Mode, when the duty ratio of S3 is reduced to the 5th preset value or switching frequency to be reduced to six preset values, into direct mode operation；
Into after direct mode operation, enter buck mode, boost mould when detecting that input voltage variable quantity is more than certain value
Formula or Buck-Boost mode.
Alternatively, the bridge-type Buck-Boost circuit have Buck-boost mode, Buck mode, boost mode and
Four kinds of operating modes of direct mode operation, specific:
The Buck-Boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction,
The state of switching frequency is reduced with the increase of S1 duty ratio or with the reduction of S3 duty ratio；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, S4 normal open, when the duty ratio of S1 is greater than first in advance
If the state of switching frequency is reduced when value with the increase of S1 duty ratio；
The boost mode refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, when the duty ratio of S3 is pre- less than second
If the state of switching frequency is reduced when value with the reduction of S3 duty ratio；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are described
The top tube and down tube of Boost half-bridge in bridge-type Buck-Boost circuit.
Corresponding, the condition switched between the different working modes is determined according to the boundary value of each operation area, packet
It includes:
Controlled circuit works in buck mode, when the duty ratio of S1 increases to third preset value, into Buck-
Boost mode, when the duty ratio of S1 increases to the 4th preset value or switching frequency is reduced to five preset values, into straight-through mould
Formula；
Controlled circuit works in Boost mode, when the duty ratio of S3 is decreased to six preset values, into Buck-
Boost mode, when the duty ratio of S3 be decreased to the 7th preset value or when switching frequency is reduced to eight preset values, into straight-through
Mode；
Into after direct mode operation, enter buck mode, boost mould when detecting that input voltage variable quantity is more than certain value
Formula or Buck-Boost mode.
A kind of multi-mode control device, comprising:
Working mode determination unit, for determining the current operating mode of controlled circuit；Wherein, it is set in advance for controlled circuit
Determine multiple-working mode, the operation areas of different working modes turns to target to meet controlled circuit best performance and is divided,
The condition switched between different working modes is determined according to the boundary value of each operation area；
Operation area determination unit, for determining the current operating status of controlled circuit；
Switch control unit judges whether controlled circuit meets from working as the operating status current according to controlled circuit
Preceding operating mode is switched to the condition of another operating mode；If satisfied, control controlled circuit switches from current operating mode
To another operating mode.
It can be seen from the above technical scheme that the present invention finds first for it a variety of for any power electronic circuit
Operating mode analyzes the advantage and disadvantage of various operating modes, is then switched to for the variation of the power electronic circuit operating status
Optimal operating mode realizes the power electronic circuit Performance optimization.The case where relative to single mode of operation is only operated in,
The present invention improves adaptability of the power electronic circuit under complicated applications occasion by multi-mode switching.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of bridge-type Buck-Boost circuit topological structure schematic diagram disclosed in the prior art；
Fig. 2 is a kind of multi-mode control method flow chart disclosed by the embodiments of the present invention；
Fig. 3 is a kind of multi-mode controling device structure diagram disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of multi-mode control methods, to improve power electronic circuit to complexity
The adaptability of application, comprising:
Step S01: the current operating mode of controlled circuit (i.e. as the power electronic circuit of research object) is determined；Its
In, multiple-working mode is set for controlled circuit in advance, the operation area of different working modes is to meet controlled circuit performance most
It is optimized for target to be divided, the condition switched between different working modes is determined according to the boundary value of each operation area；
Step S02: the current operating status of controlled circuit is determined；
Step S03: according to the current operating status of controlled circuit, judge whether controlled circuit meets from current Working mould
Formula is switched to the condition of another operating mode；If satisfied, entering step S04；If not satisfied, return step S02；
Step S04: control controlled circuit is switched to another operating mode from current operating mode, returns to step later
Rapid S01 carries out the control of next round multi-mode.
Seen from the above description, for any power electronic circuit, the present embodiment finds multiple-working mode first for it,
The advantage and disadvantage of various operating modes are analyzed, are then switched to optimal Working mould for the variation of power electronic circuit operating status
Formula realizes power electronic circuit Performance optimization.The case where relative to single mode of operation is only operated in, the present embodiment pass through more
Pattern switching improves adaptability of the power electronic circuit under complicated applications occasion.
Above-mentioned controlled circuit can be Buck circuit, Boost circuit or bridge-type Buck-Boost circuit etc., not office
Limit.Meet controlled circuit Performance optimization, can refer to that controlled circuit reaches peak efficiency, can also be and refer to otherwise performance
It is optimal state.Below for requiring bridge-type Buck-Boost circuit to reach peak efficiency, to the technology of the present embodiment
Scheme is described in detail, and three provided kind concrete application scheme is as follows.
Scheme 1:
Bridge-type Buck-Boost circuit as shown in Figure 1 is set with Buck mode, boost mode and direct mode operation three
Kind operating mode.The Buck mode, refers to S1 and S2 alternate conduction, S3 normal off, and S4 normal open is greater than first in the duty ratio of S1
The state of switching frequency is reduced when preset value with the increase of S1 duty ratio.The boost mode refers to S1 normal open, S2 normal off, S3
With S4 alternate conduction, the state of switching frequency is reduced with the reduction of S3 duty ratio when the duty ratio of S3 is less than the second preset value.
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off.
The control thought of this programme is: when input voltage be greater than output voltage when, make bridge-type Buck-Boost circuit into
Enter Buck mode；When input voltage is less than output voltage, bridge-type Buck-Boost circuit is made to enter Boost mode；When defeated
When entering voltage equal to (or being nearly equal to) output voltage, bridge-type Buck-Boost circuit is made to enter direct mode operation.Compared to " back
The single mode of operation (hereinafter referred to as Buck-Boost mode) of scape technology " introduction, in Buck mode and Boost mode
Under, inductance L1 just participates in transmitting energy to load in energy storage or release energy while in each switch periods, to a certain extent
Inductive current ripple is reduced, while only doing switch motion there are two switching tube in each switch periods, is substantially reduced out
Close loss；Zero is even more directly reduced in the loss of direct mode operation lower switch.As it can be seen that circuit efficiency obtains under this control thought
It greatly improves.This control thought can be realized by the way of modulation using double, can also come by some digitized calculating
It realizes, does not limit to.
Under this control thought, to realize steady switching and the high efficiency between different mode, plan control as follows is now provided
Slightly: controlled circuit works in buck mode, when the duty ratio of S1 is less than or equal to the first preset value (such as 0.8), keeps out
Frequency-invariant is closed, when the duty ratio of S1 is greater than first preset value, reduces switching frequency with the increase of the duty ratio of S1, directly
Duty ratio to S1 increases to third preset value (for example, the S1 that the duty ratio of at least one switching tube is corresponding when reaching limit value
Duty ratio, it is assumed that for 0.9) or when switching frequency is reduced to the 4th preset value (such as reaching minimal switching frequency limit value, similarly hereinafter),
Into direct mode operation.Controlled circuit works in boost mode, when the duty ratio of S3 is greater than or equal to the second preset value (such as
0.2) it when, keeps switching frequency constant, when the duty ratio of S3 is less than second preset value, is dropped with the reduction of the duty ratio of S3
Low switching frequency, until the duty ratio of S3 is decreased to the 5th preset value (for example, the duty ratio of at least one switching tube reaches limit value
When corresponding S3 duty ratio, it is assumed that for 0.1) or when switching frequency is reduced to six preset values, into direct mode operation.Into straight
After logical mode, enter buck or boost mode when detecting that input voltage variable quantity is more than certain value, specifically, when input
Voltage rising value enters boost mode when being more than certain value, enters buck mode when input voltage drop-out value is more than certain value.
This control strategy realizes steady switching between different mode and high efficiency, reason are as follows: the S1 under buck mode
Duty ratio closer to 1, be switched to the oscillation of direct mode operation moment with regard to smaller, furthermore got in buck mode lower switch frequency
Height, switching loss are bigger.So this control strategy uses down conversion process during S1 duty ratio rises to 0.9 by 0.8, in this way
Compared to directly from 0.9 duty ratio when be switched to direct mode operation, this control strategy reduces S1 duty ratio and rises to 0.9 by 0.8
The switching loss of period, improves circuit efficiency, compared to directly from 0.8 duty ratio when be switched to direct mode operation, this control
Tactful handoff procedure is more stable.It also can be realized steady switching and high efficiency from boost pattern switching to direct mode operation, similarly may be used
Card, repeats no more.
Scheme 2:
Bridge-type Buck-Boost circuit as shown in Figure 1 is set with Buck-boost mode, Buck mode, boost
Four kinds of operating modes of mode and direct mode operation.The Buck-Boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are led simultaneously
Logical, S1 and S2 alternate conduction reduces the state of switching frequency with the increase of S1 duty ratio.The Buck mode, refers to S1 and S2
Alternate conduction, S3 normal off, the state of S4 normal open.The boost mode refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction shape
State.The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off.
The control strategy of this programme is as follows: controlled circuit works in buck mode, when the duty ratio of S1 is greater than first in advance
If be worth (such as 0.8), into Buck-Boost mode, the increase with S1 duty ratio continues frequency redution operation, when the duty of S1
Than increasing to the second preset value (such as 0.9) or when switching frequency is reduced to third preset value, into direct mode operation.Controlled circuit work
Make in Boost mode, when the duty ratio of S3 is less than the 4th preset value (such as 0.2), into Buck-Boost mode, is accounted for S3
The reduction of empty ratio continues frequency redution operation, when the duty ratio of S3 is reduced to the 5th preset value (such as 0.1) or switching frequency to reduce
When to six preset values, into direct mode operation.Into after direct mode operation, when detecting that input voltage variable quantity is more than certain value
Into buck mode, boost mode or Buck-Boost mode, specifically, when input voltage rising value be more than certain value when into
Enter buck mode or Buck-Boost mode, enters boost mode or Buck- when input voltage drop-out value is more than certain value
Boost mode.
This programme when difference is by buck or boost pattern switching to direct mode operation, is inserted compared to scheme 1
Buck-Boost mode, although Buck-Boost mode is slightly higher compared to buck or boost mode switching loss, compared to
The single mode of operation of " background technique " introduction still has higher efficiency.Moreover, this programme is by Buck-Boost mode
When being switched to direct mode operation, steady switching and the high efficiency between different mode equally can be realized, reason and scheme 1 are similarly no longer
It repeats.
Scheme 3:
Bridge-type Buck-Boost circuit as shown in Figure 1 is set with Buck-boost mode, Buck mode, boost
Four kinds of operating modes of mode and direct mode operation.The Buck-Boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are led simultaneously
Logical, S1 and S2 alternate conduction reduces the state of switching frequency with the increase of S1 duty ratio or with the reduction of S3 duty ratio.It is described
Buck mode, refers to S1 and S2 alternate conduction, S3 normal off, and S4 normal open is accounted for when the duty ratio of S1 is greater than the first preset value with S1
The increase of empty ratio reduces the state of switching frequency.The boost mode, refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction,
The state of switching frequency is reduced with the reduction of S3 duty ratio when the duty ratio of S3 is less than the second preset value.The direct mode operation,
Refer to S1 and S4 normal open, the state of S2 and S3 normal off.
The control strategy of this programme is as follows: controlled circuit works in buck mode, when the duty ratio of S1 is greater than first in advance
If be worth (such as 0.8), switching frequency is reduced with the increase of S1 duty ratio, when the duty ratio of S1 continues to increase to third preset value
When (such as 0.85), into Buck-Boost mode, the increase with S1 duty ratio continues frequency redution operation, until the duty ratio of S1
The 4th preset value (such as 0.9) is increased to or when switching frequency is reduced to five preset values, into direct mode operation.Controlled circuit work
In Boost mode, when the duty ratio of S3 is less than the second preset value (such as 0.2), switch frequency is reduced with the reduction of S3 duty ratio
Rate, when the duty ratio of S3 continues to be decreased to the 6th preset value (such as 0.15), into Buck-Boost mode, with S3 duty ratio
Reduction continues frequency redution operation, until the duty ratio of S3 be decreased to the 7th preset value or switching frequency be reduced to it is the 8th default
When value, into direct mode operation.Into after direct mode operation, enter buck mould when detecting that input voltage variable quantity is more than certain value
Formula, boost mode or Buck-Boost mode, specifically, entering buck mode when input voltage rising value is more than certain value
Or Buck-Boost mode, enter boost mode or Buck-Boost mode when input voltage drop-out value is more than certain value.
This programme when difference is equally by buck or boost pattern switching to direct mode operation, is inserted into compared to scheme 1
Buck-Boost mode, but compared to the single mode of operation of " background technique " introduction, there is higher efficiency.Moreover,
When by Buck-Boost pattern switching to direct mode operation, the steady switching and high efficiency between different mode equally can be realized,
Reason is similarly repeated no more with scheme 1.
Furthermore it should be noted that reducing the mode of switching frequency in scheme 1,2 and 3, points several grades is can be and intermittently dropped
Low switching frequency continuously reduces switching frequency in the form of input and output voltage feedforward compensation, does not limit to.
In addition, the waiting time for being switched to direct mode operation can also be arranged in scheme 1,2 and 3, to prevent bridge-type Buck-
The operating status of Boost circuit is shaken near the boundary value of the operation area of certain operating mode, and between two operating modes of generation
The phenomenon that frequent switching.For example, when from boost pattern switching to direct mode operation, can be set to accounting for as S1 in scheme 1
Sky is than increasing to third preset value and certain time or switching frequency being maintained to be reduced to the 4th preset value and maintenance certain time
When, into direct mode operation, to prevent that the duty ratio as S1 from shake near third preset value or switching frequency is preset the 4th
Value is nearby shaken and there is a phenomenon where frequent switchings between boost mode and direct mode operation.
Referring to Fig. 3, the embodiment of the invention discloses a kind of multi-mode control devices, to improve power electronic circuit to complexity
The adaptability of application, comprising:
Working mode determination unit 100, for determining the current operating mode of controlled circuit；It wherein, is in advance controlled electricity
Road sets multiple-working mode, and the operation areas of different working modes turns to target to meet controlled circuit best performance and drawn
Point, the condition switched between different working modes is determined according to the boundary value of each operation area；
Operation area determination unit 200, for determining the current operating status of controlled circuit；
Switch control unit 300, for the operating status current according to controlled circuit, judge controlled circuit whether meet from
Current operating mode is switched to the condition of another operating mode；If satisfied, control controlled circuit is cut from current operating mode
Change to another operating mode.
In conclusion the present invention finds multiple-working mode first for it for any power electronic circuit, analyze various
Then the advantage and disadvantage of operating mode are switched to optimal operating mode for the variation of the power electronic circuit operating status, real
The now power electronic circuit Performance optimization.The case where relative to single mode of operation is only operated in, the present invention pass through multi-mode
Switching improves adaptability of the power electronic circuit under complicated applications occasion.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of 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 widest scope of features of novelty.
Claims (9)
1. a kind of multi-mode control method characterized by comprising
Determine the current operating mode of controlled circuit；Wherein, multiple-working mode, different operating mould are set for controlled circuit in advance
The operation area of formula turns to target to meet controlled circuit best performance and is divided, the condition root switched between different working modes
It is determined according to the boundary value of each operation area；
Determine the current operating status of controlled circuit；
According to the current operating status of controlled circuit, judge controlled circuit whether meet be switched to from current operating mode it is another
The condition of operating mode；
If satisfied, control controlled circuit is switched to another operating mode from current operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has three kinds of Buck mode, boost mode and direct mode operation operating modes, specifically
:
The Buck mode, refers to S1 and S2 alternate conduction, S3 normal off, and S4 normal open is greater than the first preset value in the duty ratio of S1
When, the state of switching frequency is reduced with the increase of S1 duty ratio；
The boost mode, refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, S3 duty ratio less than the second preset value
When, the state of switching frequency is reduced with the reduction of S3 duty ratio；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
2. multi-mode control method according to claim 1, which is characterized in that the item switched between the different working modes
Part is determined according to the boundary value of each operation area, comprising:
Controlled circuit works in buck mode, when the duty ratio of S1 increases to third preset value or switching frequency is reduced to the 4th
When preset value, into direct mode operation；
Controlled circuit works in boost mode, when the duty ratio of S3 is decreased to the 5th preset value or switching frequency is reduced to the
When six preset values, into direct mode operation；
Into after direct mode operation, enter buck or boost mode when detecting that input voltage variable quantity is more than certain value.
3. a kind of multi-mode control method characterized by comprising
Determine the current operating mode of controlled circuit；Wherein, multiple-working mode, different operating mould are set for controlled circuit in advance
The operation area of formula turns to target to meet controlled circuit best performance and is divided, the condition root switched between different working modes
It is determined according to the boundary value of each operation area；
Determine the current operating status of controlled circuit；
According to the current operating status of controlled circuit, judge controlled circuit whether meet be switched to from current operating mode it is another
The condition of operating mode；
If satisfied, control controlled circuit is switched to another operating mode from current operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has Buck-boost mode, Buck mode, boost mode and direct mode operation four
Kind operating mode, specific:
The Buck-boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction, with S1
The increase of duty ratio reduces the state of switching frequency；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, the state of S4 normal open；
The boost mode refers to S1 normal open, S2 normal off, the state of S3 and S4 alternate conduction；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
4. multi-mode control method according to claim 3, which is characterized in that the item switched between the different working modes
Part is determined according to the boundary value of each operation area, comprising:
Controlled circuit works in buck mode, when the duty ratio of S1 is greater than the first preset value, into Buck-Boost mode,
When the duty ratio of S1 increases to the second preset value or switching frequency is reduced to third preset value, into direct mode operation；
Controlled circuit works in Boost mode, when the duty ratio of S3 is less than four preset values, into Buck-Boost mould
Formula, when the duty ratio of S3 is reduced to the 5th preset value or switching frequency to be reduced to six preset values, into direct mode operation；
Into after direct mode operation, detect input voltage variable quantity be more than certain value when enter buck mode, boost mode or
Buck-Boost mode.
5. a kind of multi-mode control method characterized by comprising
Determine the current operating mode of controlled circuit；Wherein, multiple-working mode, different operating mould are set for controlled circuit in advance
The operation area of formula turns to target to meet controlled circuit best performance and is divided, the condition root switched between different working modes
It is determined according to the boundary value of each operation area；
Determine the current operating status of controlled circuit；
According to the current operating status of controlled circuit, judge controlled circuit whether meet be switched to from current operating mode it is another
The condition of operating mode；
If satisfied, control controlled circuit is switched to another operating mode from current operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has Buck-boost mode, Buck mode, boost mode and direct mode operation four
Kind operating mode, specific:
The Buck-Boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction, with S1
The increase of duty ratio or the state that switching frequency is reduced with the reduction of S3 duty ratio；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, S4 normal open, when the duty ratio of S1 is greater than the first preset value
When with S1 duty ratio increase reduce switching frequency state；
The boost mode refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, when the duty ratio of S3 is less than the second preset value
When with S3 duty ratio reduction reduce switching frequency state；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
6. multi-mode control method according to claim 5, which is characterized in that the item switched between the different working modes
Part is determined according to the boundary value of each operation area, comprising:
Controlled circuit works in buck mode, when the duty ratio of S1 increases to third preset value, into Buck-Boost mould
Formula, when the duty ratio of S1 increases to the 4th preset value or switching frequency is reduced to five preset values, into direct mode operation；
Controlled circuit works in Boost mode, when the duty ratio of S3 is decreased to six preset values, into Buck-Boost mould
Formula, when the duty ratio of S3 be decreased to the 7th preset value or when switching frequency is reduced to eight preset values, into direct mode operation；
Into after direct mode operation, detect input voltage variable quantity be more than certain value when enter buck mode, boost mode or
Buck-Boost mode.
7. a kind of multi-mode control device characterized by comprising
Working mode determination unit, for determining the current operating mode of controlled circuit；Wherein, it is set in advance for controlled circuit more
Kind of operating mode, the operation areas of different working modes turns to target to meet controlled circuit best performance and is divided, different
The condition switched between operating mode is determined according to the boundary value of each operation area；
Operation area determination unit, for determining the current operating status of controlled circuit；
Switch control unit judges whether controlled circuit meets from current for the operating status current according to controlled circuit
Operating mode is switched to the condition of another operating mode；If satisfied, control controlled circuit is switched to institute from current operating mode
State another operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has three kinds of Buck mode, boost mode and direct mode operation operating modes, specifically
:
The Buck mode, refers to S1 and S2 alternate conduction, S3 normal off, and S4 normal open is greater than the first preset value in the duty ratio of S1
When, the state of switching frequency is reduced with the increase of S1 duty ratio；
The boost mode, refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, S3 duty ratio less than the second preset value
When, the state of switching frequency is reduced with the reduction of S3 duty ratio；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
8. a kind of multi-mode control device characterized by comprising
Working mode determination unit, for determining the current operating mode of controlled circuit；Wherein, it is set in advance for controlled circuit more
Kind of operating mode, the operation areas of different working modes turns to target to meet controlled circuit best performance and is divided, different
The condition switched between operating mode is determined according to the boundary value of each operation area；
Operation area determination unit, for determining the current operating status of controlled circuit；
Switch control unit judges whether controlled circuit meets from current for the operating status current according to controlled circuit
Operating mode is switched to the condition of another operating mode；If satisfied, control controlled circuit is switched to institute from current operating mode
State another operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has Buck-boost mode, Buck mode, boost mode and direct mode operation four
Kind operating mode, specific:
The Buck-boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction, with S1
The increase of duty ratio reduces the state of switching frequency；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, the state of S4 normal open；
The boost mode refers to S1 normal open, S2 normal off, the state of S3 and S4 alternate conduction；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
9. a kind of multi-mode control device characterized by comprising
Working mode determination unit, for determining the current operating mode of controlled circuit；Wherein, it is set in advance for controlled circuit more
Kind of operating mode, the operation areas of different working modes turns to target to meet controlled circuit best performance and is divided, different
The condition switched between operating mode is determined according to the boundary value of each operation area；
Operation area determination unit, for determining the current operating status of controlled circuit；
Switch control unit judges whether controlled circuit meets from current for the operating status current according to controlled circuit
Operating mode is switched to the condition of another operating mode；If satisfied, control controlled circuit is switched to institute from current operating mode
State another operating mode；
The controlled circuit is bridge-type Buck-Boost circuit；
It is described to meet controlled circuit Performance optimization, comprising: the bridge-type Buck-Boost circuit is made to reach peak efficiency；
The bridge-type Buck-Boost circuit has Buck-boost mode, Buck mode, boost mode and direct mode operation four
Kind operating mode, specific:
The Buck-Boost mode refers to that S1 and S3 are simultaneously turned on, and S2 and S4 are simultaneously turned on, S1 and S2 alternate conduction, with S1
The increase of duty ratio or the state that switching frequency is reduced with the reduction of S3 duty ratio；
The Buck mode refers to S1 and S2 alternate conduction, S3 normal off, S4 normal open, when the duty ratio of S1 is greater than the first preset value
When with S1 duty ratio increase reduce switching frequency state；
The boost mode refers to S1 normal open, S2 normal off, S3 and S4 alternate conduction, when the duty ratio of S3 is less than the second preset value
When with S3 duty ratio reduction reduce switching frequency state；
The direct mode operation refers to S1 and S4 normal open, the state of S2 and S3 normal off；
Wherein, S1 and S2 is the top tube and down tube of the Buck half-bridge in the bridge-type Buck-Boost circuit, and S4 and S3 are institutes
State the top tube and down tube of the Boost half-bridge in bridge-type Buck-Boost circuit.
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| CN107359792B (en) * | 2017-09-11 | 2019-10-29 | 阳光电源股份有限公司 | A kind of power optimization device and its control method and control device |
| CN109510465A (en) * | 2017-09-14 | 2019-03-22 | 中兴通讯股份有限公司 | A kind of Working mode switching method of conversion circuit, device and buck-boost converter |
| CN107979284B (en) * | 2017-12-29 | 2020-11-06 | 西南大学 | Method and device for estimating working mode of 3-Z network boost converter |
| CN110971122A (en) * | 2018-09-28 | 2020-04-07 | 浦登有限公司 | Multi-mode power converter |
| CN111384851B (en) * | 2018-12-31 | 2021-09-24 | 炬芯科技股份有限公司 | Control method and device of DC-DC converter |
| CN109617413B (en) * | 2019-01-30 | 2024-03-01 | 上海艾为电子技术股份有限公司 | Boost chip and mode switching circuit thereof |
| CN111371364B (en) * | 2020-03-17 | 2022-03-25 | 美的集团股份有限公司 | Boost-buck driving method and device, air conditioner and computer readable storage medium |
| CN113472199B (en) * | 2021-06-30 | 2022-09-27 | 易事特集团股份有限公司 | Mode smooth switching method and system of Buck-Boost circuit |
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