CN110176860A - The boost converter of the current compensation branch containing output - Google Patents
The boost converter of the current compensation branch containing output Download PDFInfo
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- CN110176860A CN110176860A CN201910527609.7A CN201910527609A CN110176860A CN 110176860 A CN110176860 A CN 110176860A CN 201910527609 A CN201910527609 A CN 201910527609A CN 110176860 A CN110176860 A CN 110176860A
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
-
- 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
- H02M3/155—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 using semiconductor devices only
- H02M3/156—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
- H02M3/155—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 using semiconductor devices only
- H02M3/1557—Single ended primary inductor converters [SEPIC]
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A kind of boost converter of the current compensation branch containing output, including inductance L1, N-channel MOS pipe M1, diode D1, capacitor Co, output current compensation branch and controller, in the output current compensation branch, when N-channel MOS pipe M1 cut-off, stream one part of current is punished from inductance L1 by its port a and is used for energy stores；It when N-channel MOS pipe M1 conducting, is released energy by its port b, provides electric current for capacitor Co and load RL；The controller uses Sofe Switch controller, and the switch state of N-channel MOS pipe M1 is controlled by its port g, and the working condition of the storage of output current compensation branch energy or release is controlled by its port c.The present invention has the characteristics that low output voltage ripple and efficient.
Description
Technical field
The present invention relates to boost converter, the boost converter of especially a kind of current compensation branch containing output, no
But output voltage ripple is small, but also can work in Sofe Switch state, is suitable for low output voltage ripple and efficient application
Occasion.
Background technique
The output electric current (referring to the electric current for flowing through freewheeling diode to output end) of traditional Boost be it is interrupted, this
It is larger that characteristic will lead to its output voltage ripple.Lesser output voltage ripple is obtained, the usual method is that increasing output electricity
Solve capacitor capacity or increase filter.But common alminium electrolytic condenser is poor to the tolerance of pulsating current, performance
It is affected by temperature serious；Common filter (such as: LC filter) can reduce the dynamic responding speed and whole efficiency of circuit.
Accordingly, it is considered to introduce output current compensation branch for traditional Boost, do not increasing output electrolytic capacitor value
Under the premise of export electric current by mending shape and improve output voltage ripple.Further, Sofe Switch controller can be used, change " is opened firmly
Pass " is the working method of " Sofe Switch ", promotes circuit efficiency.
Summary of the invention
To overcome traditional biggish deficiency of Boost output voltage ripple, the present invention provides a kind of electric current containing output
Compensate the boost converter of branch, it is therefore intended that improve output voltage ripple raising efficiency simultaneously.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of boost converter of the current compensation branch containing output, including inductance L1, N-channel MOS pipe M1, diode
D1, capacitor Co, output current compensation branch and controller, the current compensation branch have port a, port b and port c, institute
Controller is stated with port g and port c, the anode of DC power supply Vi is connected with one end of inductance L1, and the other end of inductance L1 is same
When be connected with the drain electrode of N-channel MOS pipe M1, the anode of port a and diode D1 for exporting current compensation branch, diode D1
Cathode simultaneously with the output port b of current compensation branch, capacitor Co one end and load one end of RL and be connected, load RL's
The other end is connected with the negative terminal of the other end of capacitor Co, the source electrode of N-channel MOS pipe M1 and DC power supply Vi simultaneously, output electricity
The port c of stream compensation branch is connected with the port c of controller, and the port g of controller is connected with the grid of N-channel MOS pipe M1；
In the output current compensation branch, when N-channel MOS pipe M1 cut-off, is punished and flowed from inductance L1 by its port a
One part of current is used for energy stores；It when N-channel MOS pipe M1 conducting, is released energy by its port b, for capacitor Co and is born
It carries RL and electric current is provided；
In the controller, the switch state of N-channel MOS pipe M1 is controlled by its port g, is controlled by its port c defeated
The working condition of the storage of current compensation branch energy or release out.
Further, the first preferred embodiment of the output current compensation branch, the output current compensation branch include
One end of inductance La1, N-channel MOS pipe Ma1 and diode Da1, inductance La1 are connected with the port a of output current compensation branch,
The other end of inductance La1 is connected with the anode of the drain electrode of N-channel MOS pipe Ma1 and diode Da1 simultaneously, the yin of diode Da1
Pole is connected with the port b of output current compensation branch, and the source electrode of N-channel MOS pipe Ma1 is connected with the source electrode of N-channel MOS pipe M1, N
The grid of channel MOS tube Ma1 is connected with the port c of output current compensation branch.
Either, second of preferred embodiment of the output current compensation branch, the output current compensation branch include
Inductance Lb1, inductance Lb2, N-channel MOS pipe Mb1 and diode Db1, one end of inductance Lb1 and the end of output current compensation branch
Mouthful a is connected, and the other end of inductance Lb1 is connected with the drain electrode of N-channel MOS pipe Mb1, the source electrode of N-channel MOS pipe Mb1 and meanwhile with N ditch
The source electrode of road metal-oxide-semiconductor M1 and one end of inductance Lb2 are connected, and the other end of inductance Lb2 is connected with the anode of diode Db1, and two
The cathode of pole pipe Db1 is connected with the port b of output current compensation branch, the grid and output current compensation of N-channel MOS pipe Mb1
The port c of branch is connected, and there are coupled relations by inductance Lb1 and inductance Lb2, and one end of inductance Lb1 and one end of inductance Lb2 are same
Name end.Consider that there are leakage inductances between inductance Lb1 and inductance Lb2, can add voltage peak absorbing branch, voltage peak absorbing branch
Including resistance Rb1, capacitor Cb1 and diode Db2, one end of resistance Rb1 simultaneously with one end of inductance Lb1 and capacitor Cb1
One end is connected, and the other end of resistance Rb1 is connected with the cathode of the other end of capacitor Cb1 and diode Db2 simultaneously, diode
The anode of Db2 is connected with the other end of inductance Lb1.Because of the reason of coupling inductance Lb1 and Lb2, the of current compensation branch is exported
Two kinds of preferred embodiments have broader output current compensation range than the first preferred embodiment for exporting current compensation branch.
Again either, the third preferred embodiment of the output current compensation branch, the output current compensation branch packet
Include inductance Lc1, inductance Lc2, N-channel MOS pipe Mc1 and diode Dc1, one end and the output current compensation branch of inductance Lc1
Port a is connected, and the other end of inductance Lc1 is connected with one end of the drain electrode of N-channel MOS pipe Mc1 and inductance Lc2 simultaneously, inductance
The other end of Lc2 is connected with the anode of diode Dc1, the port b phase of the cathode and output current compensation branch of diode Dc1
Even, the source electrode of N-channel MOS pipe Mc1 is connected with the source electrode of N-channel MOS pipe M1, the grid and output electric current of N-channel MOS pipe Mc1
The port c for compensating branch is connected, and there are coupled relation, one end of inductance Lc1 and one end of inductance Lc2 by inductance Lc1 and inductance Lc2
It is Same Name of Ends.Consider that there are leakage inductances between inductance Lc1 and inductance Lc2, can add voltage peak absorbing branch, voltage peak absorbing
Branch includes resistance Rc1, capacitor Cc1 and diode Dc2, one end of resistance Rc1 one end with inductance Lc1 and capacitor simultaneously
One end of Cc1 is connected, and the other end of resistance Rc1 is connected with the cathode of the other end of capacitor Cc1 and diode Dc2 simultaneously, and two
The anode of pole pipe Dc2 is connected with the other end of inductance Lc1.Export the third preferred embodiment and output electric current of current compensation branch
The effect for compensating second of preferred embodiment (Lb2 > Lb1) of branch is close.
It again or is the 4th kind of preferred embodiment of the output current compensation branch, the output current compensation branch
Including inductance Ld1, inductance Ld2, N-channel MOS pipe Md1 and diode Dd1, one end of inductance Ld1 and output current compensation branch
Port a be connected, the other end of inductance Ld1 is connected with the anode of one end of inductance Ld2 and diode Dd1 simultaneously, diode
The cathode of Dd1 is connected with the port b of output current compensation branch, the drain electrode phase of the other end and N-channel MOS pipe Md1 of inductance Ld2
Even, the source electrode of N-channel MOS pipe Md1 is connected with the source electrode of N-channel MOS pipe M1, the grid and output electric current of N-channel MOS pipe Md1
The port c for compensating branch is connected, and there are coupled relation, one end of inductance Ld1 and one end of inductance Ld2 by inductance Ld1 and inductance Ld2
It is Same Name of Ends.Consider that there are leakage inductances between inductance Ld1 and inductance Ld2, can add voltage peak absorbing branch, voltage peak absorbing
Branch includes resistance Rd1, capacitor Cd1 and diode Dd2, one end of resistance Rd1 one end with inductance Ld2 and capacitor simultaneously
One end of Cd1 is connected, and the other end of resistance Rd1 is connected with the cathode of the other end of capacitor Cd1 and diode Dd2 simultaneously, and two
The anode of pole pipe Dd2 is connected with the other end of inductance Ld2.Export the 4th kind of preferred embodiment and output electric current of current compensation branch
The effect for compensating second of preferred embodiment (Lb2 < Lb1) of branch is close.
Further, the controller is Sofe Switch controller, it is assumed that the voltage of its port g is vg, the voltage of port c
For vc, switch periods T, D are the duty ratio of vg, and Dc is the duty ratio of vc, and the value range of D and Dc are 0 to 1, vg and vc
Meet formula (1) and formula (2) respectively, n is the integer more than or equal to 0:
The control strategy of " D for main Dc supplemented by " is used, steps are as follows:
Step 1: according to DC power supply Vi, load RL or described containing the boost converter for exporting current compensation branch
Output voltage Vo adjusts D, and vg is arranged by formula (1)；Meanwhile assignment Dc=D, by formula (2), vc is set；
Step 2: keeping D and vg constant, adjusts the size of Dc and by formula (2) setting vc until N-channel MOS pipe M1 meets
The operating characteristic that no-voltage or quasi- no-voltage are opened；
Step 3: repeating step 1 to step 2 until the boost converter of the current compensation branch containing output enters
Stable state.
The controller uses single-chip microcontroller, DSP or FPGA programming device, such as: TMS32F28027.
Technical concept of the invention are as follows: export current compensation branch by introducing, improve the output of traditional Boost
Voltage ripple.Meanwhile using Sofe Switch controller, entire circuit can the mode of " Sofe Switch " work, realize improved efficiency.
Beneficial effects of the present invention are mainly manifested in: in conjunction with Sofe Switch controller, the current compensation branch containing output
Boost converter can have the characteristics that low output voltage ripple and efficient.
Detailed description of the invention
Fig. 1 is circuit block diagram of the invention.
Fig. 2 is the output current compensation subcircuits figure that the embodiment of the present invention 1 uses.
Fig. 3 is the output current compensation subcircuits figure that the embodiment of the present invention 2 uses.
Fig. 4 is the output current compensation subcircuits figure that the embodiment of the present invention 3 uses.
Fig. 5 is the output current compensation subcircuits figure that the embodiment of the present invention 4 uses.
Fig. 6 is the Sofe Switch control signal timing diagram that the embodiment of the present invention 1 to embodiment 4 uses.
Fig. 7 is the simulation waveform of the embodiment of the present invention 1.
Fig. 8 is the simulation waveform of the embodiment of the present invention 2.
Fig. 9 is the simulation waveform of the embodiment of the present invention 3.
Figure 10 is the simulation waveform of the embodiment of the present invention 4.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment 1
With reference to Fig. 1, it is a kind of containing output current compensation branch boost converter, including inductance L1, N-channel MOS pipe M1,
Diode D1, capacitor Co, output current compensation branch and controller, the current compensation branch have port a, port b and end
Mouth c, the controller have port g and port c, and the anode of DC power supply Vi is connected with one end of inductance L1, and inductance L1's is another
One end is connected with the anode of the drain electrode of N-channel MOS pipe M1, the port a and diode D1 that export current compensation branch simultaneously, and two
The cathode of pole pipe D1 is connected with one end of the port b of output current compensation branch, one end of capacitor Co and load RL simultaneously, bears
The other end for carrying RL is connected with the negative terminal of the other end of capacitor Co, the source electrode of N-channel MOS pipe M1 and DC power supply Vi simultaneously,
The port c of output current compensation branch is connected with the port c of controller, the grid of the port g and N-channel MOS pipe M1 of controller
It is connected；
In the output current compensation branch, when N-channel MOS pipe M1 cut-off, is punished and flowed from inductance L1 by its port a
One part of current is used for energy stores；It when N-channel MOS pipe M1 conducting, is released energy by its port b, for capacitor Co and is born
It carries RL and electric current is provided；
In the controller, the switch state of N-channel MOS pipe M1 is controlled by its port g, is controlled by its port c defeated
The working condition of the storage of current compensation branch energy or release out.
With reference to Fig. 2, the output current compensation branch includes inductance La1, N-channel MOS pipe Ma1 and diode Da1, inductance
One end of La1 is connected with the port a of output current compensation branch, the leakage with N-channel MOS pipe Ma1 simultaneously of the other end of inductance La1
The anode of pole and diode Da1 are connected, and the cathode of diode Da1 is connected with the port b of output current compensation branch, N-channel
The source electrode of metal-oxide-semiconductor Ma1 is connected with the source electrode of N-channel MOS pipe M1, the grid and output current compensation branch of N-channel MOS pipe Ma1
Port c be connected.
With reference to Fig. 6, the controller is Sofe Switch controller, it is assumed that the voltage of its port g is vg, the voltage of port c
For vc, switch periods T, D are the duty ratio of vg, and Dc is the duty ratio of vc, and the value range of D and Dc are 0 to 1, vg and vc
Meet formula (1) and formula (2) respectively.The control strategy of " D for main Dc supplemented by " is used, steps are as follows:
Step 1: according to DC power supply Vi, load RL or described containing the boost converter for exporting current compensation branch
Output voltage Vo adjusts D, and vg is arranged by formula (1)；Meanwhile assignment Dc=D, by formula (2), vc is set；
Step 2: keeping D and vg constant, adjusts the size of Dc and by formula (2) setting vc until N-channel MOS pipe M1 meets
The operating characteristic that no-voltage or quasi- no-voltage are opened；
Step 3: repeating step 1 to step 2 until the boost converter of the current compensation branch containing output enters
Stable state.
The controller is using programming devices such as single-chip microcontroller, DSP or FPGA, such as: TMS32F28027.
Fig. 7 is an exemplary simulation waveform diagram (D=0.8) of the embodiment of the present invention 1.As shown in Figure 7, the electric current of inductance L1
IL1 is continuous, and the electric current ia for flowing into output current compensation tributary port a is interrupted, and output electric current io is also interrupted, output voltage Vo > straight
Galvanic electricity source Vi.But electric current io is exported in a switch periods T and is capacitor Co and loads up to 2 times (ratios of number of RL charging
Traditional Boost is 1 time more), output voltage ripple can be effectively reduced.When M1 conducting and Ma1 cut-off, D1 cut-off, L1 fills
Magnetic, iL1 rise；Da1 conducting, La1 put magnetic and provide energy for capacitor Co and load RL, and ia=ib decline flows through M1's up to being 0
Electric current iM1=iL1-ia≤iL1, therefore the conduction loss of M1 is lower than traditional Boost and the reverse recovery loss of Da1
It is 0, it is all advantageous to raising efficiency.When M1 cut-off and Ma1 conducting, D1 conducting, L1 puts magnetic and provides energy for capacitor Co and load RL
Amount, iL1 decline；Da1 cut-off, La1 magnetize, and ia rises；The electric current iD1=iL1-ia decline of diode D1 is until be 0, for M1 reality
Existing Sofe Switch provides condition.After iD1 falls to 0, D1 shutdown, the reverse recovery loss of D1 is 0, advantageous to raising efficiency；Ma1
It is still connected, the spur performance capacitor of La1 and M1 generate resonance.When the drain voltage vM1 of M1 drops to 0 because of resonance, controller
M1 and shutdown Ma1 are opened simultaneously, so that M1 realizes that no-voltage is open-minded, therefore the turn-on consumption of M1 is lower than traditional Boost,
It is advantageous to raising efficiency.
Embodiment 2
With reference to Fig. 1, Fig. 3 and Fig. 6, a kind of boost converter of the current compensation branch containing output exports current compensation
Branch includes inductance Lb1, inductance Lb2, N-channel MOS pipe Mb1 and diode Db1, one end and the output current compensation of inductance Lb1
The port a of branch is connected, and the other end of inductance Lb1 is connected with the drain electrode of N-channel MOS pipe Mb1, the source electrode of N-channel MOS pipe Mb1
It is connected simultaneously with one end of the source electrode of N-channel MOS pipe M1 and inductance Lb2, the other end of inductance Lb2 and the sun of diode Db1
Extremely it is connected, the cathode of diode Db1 is connected with the port b of output current compensation branch, the grid of N-channel MOS pipe Mb1 and output
The port c of current compensation branch is connected, inductance Lb1 and inductance Lb2 there are coupled relation, one end of inductance Lb1 and inductance Lb2's
One end is Same Name of Ends.
Consider between inductance Lb1 and inductance Lb2 there are leakage inductance, the output current compensation branch further includes that due to voltage spikes is inhaled
Revenue and expenditure road, voltage peak absorbing branch include resistance Rb1, capacitor Cb1 and diode Db2, and one end of resistance Rb1 is simultaneously and inductance
One end of Lb1 and one end of capacitor Cb1 are connected, the other end of resistance Rb1 while the other end and diode with capacitor Cb1
The cathode of Db2 is connected, and the anode of diode Db2 is connected with the other end of inductance Lb1.
The other structures (including controller) of embodiment 2 are same as Example 1, and the course of work is also similar to Example 1.But
It is that embodiment 2 has broader output current compensation range.When D is larger, Lb2 > Lb1 is taken to be more conducive to reduce output voltage line
Wave；When D is smaller, Lb2 < Lb1 is taken to be more conducive to reduce output voltage ripple.
Fig. 8 is an exemplary simulation waveform diagram (D=0.2, Lb2 > Lb1) for the embodiment of the present invention 2.As shown in Figure 8, inductance
The electric current iL1 of L1 is continuous, and the electric current ia for flowing into output current compensation tributary port a is interrupted, and output electric current io is also interrupted, output electricity
Press Vo > DC power supply Vi.But electric current io is exported in a switch periods T and is capacitor Co and loads RL charging often
Up to 2 times (more than traditional Boost 1 time), output voltage ripple can be effectively reduced.When M1 conducting and Mb1 cut-off, D1 is cut
Only, L1 magnetizes, and iL1 rises；Db1 conducting, Lb2 put magnetic and provide energy for capacitor Co and load RL, and ia=0, ib decline are until be
0.After ib falls to 0, Db1 cut-off, the reverse recovery loss of Db1 is 0, advantageous to raising efficiency.When M1 and Mb1 are turned off
When, D1 conducting, L1 puts magnetic and provides energy, iL1 decline for capacitor Co and load RL.When M1 cut-off but Mb1 conducting, D1 is still led
Logical, L1 still puts magnetic and provides energy for capacitor Co and load RL, and iL1 still declines；Lb1 magnetizes, and ia rises；The electric current of diode D1
ID1=iL1-ia decline realizes that Sofe Switch provides condition up to being 0, for M1.After iD1 falls to 0, D1 shutdown, D1's is reversed
Restoring loss is 0, advantageous to raising efficiency；Mb1 is still connected, and the spur performance capacitor of Lb1 and M1 generate resonance.When the drain electrode of M1
When voltage vM1 drops to 0 because of resonance, controller opens M1 and shutdown Mb1 simultaneously, so that M1 realizes that no-voltage is open-minded, therefore M1
Turn-on consumption be lower than traditional Boost, it is advantageous to raising efficiency.
Embodiment 3
With reference to Fig. 1, Fig. 4 and Fig. 6, a kind of boost converter of the current compensation branch containing output exports current compensation
Branch includes inductance Lc1, inductance Lc2, N-channel MOS pipe Mc1 and diode Dc1, one end and the output current compensation of inductance Lc1
The port a of branch is connected, the other end of inductance Lc1 simultaneously with the drain electrode of N-channel MOS pipe Mc1 and one end phase of inductance Lc2
Even, the other end of inductance Lc2 is connected with the anode of diode Dc1, the cathode of diode Dc1 and the end of output current compensation branch
Mouth b is connected, and the source electrode of N-channel MOS pipe Mc1 is connected with the source electrode of N-channel MOS pipe M1, the grid of N-channel MOS pipe Mc1 and output
The port c of current compensation branch is connected, inductance Lc1 and inductance Lc2 there are coupled relation, one end of inductance Lc1 and inductance Lc2's
One end is Same Name of Ends.
Consider between inductance Lc1 and inductance Lc2 there are leakage inductance, the output current compensation branch further includes that due to voltage spikes is inhaled
Revenue and expenditure road, voltage peak absorbing branch include resistance Rc1, capacitor Cc1 and diode Dc2, and one end of resistance Rc1 is simultaneously and inductance
One end of Lc1 and one end of capacitor Cc1 are connected, the other end of resistance Rc1 while the other end and diode with capacitor Cc1
The cathode of Dc2 is connected, and the anode of diode Dc2 is connected with the other end of inductance Lc1.
The other structures (including controller) of embodiment 3 are same as Example 2, the course of work also taken with embodiment 2 Lb2 >
It is similar when Lb1.
Fig. 9 is an exemplary simulation waveform diagram (D=0.5) of the embodiment of the present invention 3.As shown in Figure 9, the electric current of inductance L1
IL1 is continuous, and the electric current ia for flowing into output current compensation tributary port a is interrupted, and output electric current io is also interrupted, output voltage Vo > straight
Galvanic electricity source Vi.But electric current io is exported in a switch periods T and is capacitor Co and loads up to 2 times (ratios of number of RL charging
Traditional Boost is 1 time more), output voltage ripple can be effectively reduced.When M1 conducting and Mc1 cut-off, D1 cut-off, L1 fills
Magnetic, iL1 rise；Dc1 conducting, coupling inductance Lc1 and Lc2 put magnetic jointly and are capacitor Co and load RL and provide energy, under ia=ib
Drop flows through electric current iM1=iL1-ia≤iL1 of M1, therefore the conduction loss of M1 is lower than traditional Boost until be 0, right
Raising efficiency is advantageous.After ib falls to 0, Dc1 cut-off, the reverse recovery loss of Dc1 is 0, also advantageous to raising efficiency.Work as M1
When cut-off and Mc1 conducting, D1 conducting, L1 puts magnetic and provides energy, iL1 decline for capacitor Co and load RL；Lc1 magnetizes, and ia rises；
The electric current iD1=iL1-ia decline of diode D1 realizes that Sofe Switch provides condition up to being 0, for M1.After iD1 falls to 0, D1
Shutdown, the reverse recovery loss of D1 is 0, advantageous to raising efficiency；Mc1 is still connected, and the spur performance capacitor of Lc1 and M1 generate humorous
Vibration.When the drain voltage vM1 of M1 repeatedly drops to 0 because of resonance, controller opens M1 and shutdown Mc1 simultaneously, so that M1 is realized
No-voltage is open-minded, therefore the turn-on consumption of M1 is lower than traditional Boost, advantageous to raising efficiency.
Embodiment 4
With reference to Fig. 1, Fig. 5 and Fig. 6, a kind of boost converter of the current compensation branch containing output exports current compensation
Branch includes inductance Ld1, inductance Ld2, N-channel MOS pipe Md1 and diode Dd1, one end and the output current compensation of inductance Ld1
The port a of branch is connected, and the other end of inductance Ld1 is connected with the anode of one end of inductance Ld2 and diode Dd1 simultaneously, and two
The cathode of pole pipe Dd1 is connected with the port b of output current compensation branch, the leakage of the other end and N-channel MOS pipe Md1 of inductance Ld2
Extremely it is connected, the source electrode of N-channel MOS pipe Md1 is connected with the source electrode of N-channel MOS pipe M1, the grid of N-channel MOS pipe Md1 and output
The port c of current compensation branch is connected, inductance Ld1 and inductance Ld2 there are coupled relation, one end of inductance Ld1 and inductance Ld2's
One end is Same Name of Ends.
Consider between inductance Ld1 and inductance Ld2 there are leakage inductance, the output current compensation branch further includes that due to voltage spikes is inhaled
Revenue and expenditure road, voltage peak absorbing branch include resistance Rd1, capacitor Cd1 and diode Dd2, and one end of resistance Rd1 is simultaneously and inductance
One end of Ld2 and one end of capacitor Cd1 are connected, the other end of resistance Rd1 while the other end and diode with capacitor Cd1
The cathode of Dd2 is connected, and the anode of diode Dd2 is connected with the other end of inductance Ld2.
The other structures (including controller) of embodiment 4 are same as Example 2, the course of work also taken with embodiment 2 Lb2 <
It is similar when Lb1.
Figure 10 is an exemplary simulation waveform diagram (D=0.2) of the embodiment of the present invention 4.As shown in Figure 10, the electricity of inductance L1
Stream iL1 is continuous, and the electric current ia for flowing into output current compensation tributary port a is interrupted, and output electric current io is also interrupted, and output voltage Vo >
DC power supply Vi.But number up to 2 times that electric current io is capacitor Co and loads RL charging are exported in a switch periods T
(more than traditional Boost 1 time), can effectively reduce output voltage ripple.When M1 conducting and Md1 cut-off, D1 cut-off, L1
It magnetizes, iL1 rises；Dd1 conducting, Ld1 put magnetic and provide energy for capacitor Co and load RL, and ia=ib decline flows through M1 up to being 0
Electric current iM1=iL1-ia≤iL1, therefore the conduction loss of M1 is lower than traditional Boost, advantageous to raising efficiency.When
After ib falls to 0, Dd1 cut-off, the reverse recovery loss of Dd1 is 0, also advantageous to raising efficiency.When M1 and Md1 are turned off,
D1 conducting, L1 put magnetic and provide energy, iL1 decline for capacitor Co and load RL.When M1 cut-off but Md1 conducting, D1 is still connected, L1
It still puts magnetic and provides energy for capacitor Co and load RL, iL1 still declines；Coupling inductance Ld1 and Ld2 magnetize jointly, and ia rises；Two poles
The electric current iD1=iL1-ia decline of pipe D1 realizes that Sofe Switch provides condition up to being 0, for M1.After iD1 falls to 0, D1 is closed
Disconnected, the reverse recovery loss of D1 is 0, advantageous to raising efficiency；Md1 is still connected, and the spur performance capacitor of Ld1 and Ld2 and M1 produce
Raw resonance.When the drain voltage vM1 of M1 drops to minimum point because of resonance, controller opens M1 and shutdown Md1 simultaneously, so that M1
Realize that quasi- no-voltage is open-minded, therefore the turn-on consumption of M1 is lower than traditional Boost, it is advantageous to raising efficiency.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention is also and in this field skill
Art personnel conceive according to the present invention it is conceivable that equivalent technologies mean.
Claims (7)
1. a kind of boost converter of the current compensation branch containing output, it is characterised in that: the current compensation branch containing output
Boost converter include inductance L1, N-channel MOS pipe M1, diode D1, capacitor Co, output current compensation branch and control
Device, the current compensation branch have port a, port b and port c, and the controller has port g and port c, DC power supply
The anode of Vi is connected with one end of inductance L1, and the other end of inductance L1 is mended with the drain electrode of N-channel MOS pipe M1, output electric current simultaneously
The anode for repaying the port a and diode D1 of branch is connected, the cathode of diode D1 while the end with output current compensation branch
One end of mouth b, one end of capacitor Co and load RL are connected, and load the other end of RL while the other end, N-channel with capacitor Co
The source electrode of metal-oxide-semiconductor M1 and the negative terminal of DC power supply Vi are connected, and export the port c of current compensation branch and the port c of controller
It is connected, the port g of controller is connected with the grid of N-channel MOS pipe M1；
In the output current compensation branch, when N-channel MOS pipe M1 cut-off, by its port a from inductance L1 punishment stream one
Electric current is divided to be used for energy stores；It when N-channel MOS pipe M1 conducting, is released energy by its port b, is capacitor Co and load RL
Electric current is provided；
In the controller, the switch state of N-channel MOS pipe M1 is controlled by its port g, and output electricity is controlled by its port c
The working condition of stream compensation branch energy storage or release.
2. the boost converter of the current compensation branch containing output as described in claim 1, it is characterised in that: the output electricity
Stream compensation branch includes inductance La1, N-channel MOS pipe Ma1 and diode Da1, one end and the output current compensation branch of inductance La1
The port a on road is connected, the other end of inductance La1 simultaneously with the drain electrode of N-channel MOS pipe Ma1 and the anode phase of diode Da1
Even, the cathode of diode Da1 is connected with the port b of output current compensation branch, the source electrode and N-channel MOS of N-channel MOS pipe Ma1
The source electrode of pipe M1 is connected, and the grid of N-channel MOS pipe Ma1 is connected with the port c of output current compensation branch.
3. the boost converter of the current compensation branch containing output as described in claim 1, it is characterised in that: the output electricity
Stream compensation branch includes inductance Lb1, inductance Lb2, N-channel MOS pipe Mb1 and diode Db1, and one end of inductance Lb1 and output are electric
The port a of stream compensation branch is connected, and the other end of inductance Lb1 is connected with the drain electrode of N-channel MOS pipe Mb1, N-channel MOS pipe Mb1
Source electrode simultaneously be connected with one end of the source electrode of N-channel MOS pipe M1 and inductance Lb2, the other end and diode of inductance Lb2
The anode of Db1 is connected, and the cathode of diode Db1 is connected with the port b of output current compensation branch, the grid of N-channel MOS pipe Mb1
Pole is connected with the port c of output current compensation branch, inductance Lb1 and inductance Lb2 there are coupled relation, one end of inductance Lb1 with
One end of inductance Lb2 is Same Name of Ends.
4. the boost converter of the current compensation branch containing output as described in claim 1, it is characterised in that: the output electricity
Stream compensation branch includes inductance Lc1, inductance Lc2, N-channel MOS pipe Mc1 and diode Dc1, and one end of inductance Lc1 and output are electric
The port a of stream compensation branch is connected, the other end of inductance Lc1 simultaneously with the drain electrode of N-channel MOS pipe Mc1 and inductance Lc2 one
End is connected, and the other end of inductance Lc2 is connected with the anode of diode Dc1, the cathode and output current compensation branch of diode Dc1
Port b be connected, the source electrode of N-channel MOS pipe Mc1 is connected with the source electrode of N-channel MOS pipe M1, the grid of N-channel MOS pipe Mc1 and
The port c for exporting current compensation branch is connected, and there are coupled relation, one end of inductance Lc1 and inductance by inductance Lc1 and inductance Lc2
One end of Lc2 is Same Name of Ends.
5. the boost converter of the current compensation branch containing output as described in claim 1, it is characterised in that: the output electricity
Stream compensation branch includes inductance Ld1, inductance Ld2, N-channel MOS pipe Md1 and diode Dd1, and one end of inductance Ld1 and output are electric
The port a of stream compensation branch is connected, the other end of inductance Ld1 simultaneously with one end of inductance Ld2 and the anode phase of diode Dd1
Even, the cathode of diode Dd1 is connected with the port b of output current compensation branch, the other end and N-channel MOS pipe of inductance Ld2
The drain electrode of Md1 is connected, and the source electrode of N-channel MOS pipe Md1 is connected with the source electrode of N-channel MOS pipe M1, the grid of N-channel MOS pipe Md1
It is connected with the port c of output current compensation branch, there are coupled relation, one end of inductance Ld1 and electricity by inductance Ld1 and inductance Ld2
The one end for feeling Ld2 is Same Name of Ends.
6. the boost converter of the current compensation branch containing output as described in one of Claims 1 to 5, it is characterised in that: institute
Stating controller is Sofe Switch controller, it is assumed that the voltage of its port g is vg, and the voltage of port c is vc, switch periods T, D
For the duty ratio of vg, Dc is the duty ratio of vc, and the value range of D and Dc are that 0 to 1, vg and vc meet formula (1) and formula respectively
(2), n is the integer more than or equal to 0:
The control strategy of " D for main Dc supplemented by " is used, steps are as follows:
Step 1: according to the output of DC power supply Vi, the boost converter of load RL or described current compensation branch containing output
Voltage Vo adjusts D, and vg is arranged by formula (1)；Meanwhile assignment Dc=D, by formula (2), vc is set；
Step 2: keeping D and vg constant, adjusts the size of Dc and by formula (2) setting vc until N-channel MOS pipe M1 meets zero electricity
The operating characteristic that pressure or quasi- no-voltage are opened；
Step 3: repeating step 1 to step 2 until the boost converter of the current compensation branch containing output enters surely
State.
7. the boost converter of the current compensation branch containing output as claimed in claim 6, it is characterised in that: the controller
Using single-chip microcontroller, DSP or FPGA programming device.
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