CN101997409A - DC-DC converter - Google Patents

DC-DC converter Download PDF

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Publication number
CN101997409A
CN101997409A CN2009101675338A CN200910167533A CN101997409A CN 101997409 A CN101997409 A CN 101997409A CN 2009101675338 A CN2009101675338 A CN 2009101675338A CN 200910167533 A CN200910167533 A CN 200910167533A CN 101997409 A CN101997409 A CN 101997409A
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China
Prior art keywords
power supply
converter
voltage
switching tube
detection signal
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CN2009101675338A
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Chinese (zh)
Inventor
徐德鸿
苏娜
陈敏
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Siemens AG
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Siemens AG
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Priority to CN2009101675338A priority Critical patent/CN101997409A/en
Priority to PCT/EP2010/061594 priority patent/WO2011020737A1/en
Publication of CN101997409A publication Critical patent/CN101997409A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M3/158—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 including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention relates to a DC-DC converter which comprises a main circuit and a control module, wherein the main circuit comprises a first capacitor, first to fourth switching tubes, a first inductor and a second inductor, wherein the first to fourth switching tubes are respectively connected with a backward diode in parallel, a serial circuit formed from the first switching tube and the third switching tube is connected with the first capacitor in parallel, and a serial circuit formed from the second switching tube and the fourth switching tube is connected with the first capacitor in parallel; one end of the first inductor is connected with a first DC power supply, the other end is connected with a point located on the serial circuit of the first switching tube and the third switching tube, one end of the second inductor is connected with a second DC power supply, and the other end is connected with a point located on the serial circuit of the second switching tube and the fourth switching tube; and the control module is used for controlling the working state of the first to fourth switching tubes according to a direction control signal and voltage detection signals of the first DC power supply and the second DC power supply. The DC-DC converter can reduce the pulsation of an input current and an output current.

Description

A kind of DC-DC converter
Technical field
The present invention relates to a kind of DC-DC converter.
Background technology
Traditional booster circuit only is applicable to that output voltage is higher than the occasion of input voltage, and traditional reduction voltage circuit only is applicable to that output voltage is lower than the occasion of input voltage, thereby, for needing output voltage both can be lower than the occasion that also can be higher than input voltage, traditional booster circuit and reduction voltage circuit all can't be suitable for.
For this reason, people have designed step-up/step-down circuit (Buck/Boost).Though initial step-up/step-down circuit has realized that output voltage both can rise the function that also can fall with respect to input voltage, input voltage and output voltage are reversed polarity, and such step-up/step-down circuit is unfavorable for using in electric automobile.
To this, people have proposed a kind of two-way step-up step-down DC-DC converter as shown in Figure 1, and its output voltage is a positive polarity.But the input current of this two-way step-up step-down DC-DC converter and the pulsation of output current are very big, and when being applied to storage battery, the pulsation of electric current can influence the fail safe and the useful life of battery.
Summary of the invention
Consider the problems referred to above of prior art, embodiments of the invention propose a kind of DC-DC converter, and it can reduce the pulsation of input current and output current.
A kind of DC-DC converter according to the embodiment of the invention comprises main circuit and control module, and wherein, described main circuit comprises: first electric capacity; The first, second, third and the 4th is parallel with the switching tube of backward diode separately, wherein, the series circuit that the described first and the 3rd switching tube forms is in parallel with described first electric capacity, and the series circuit that the described second and the 4th switching tube forms is in parallel with described first electric capacity; First and second inductance, wherein, a wherein end of described first inductance is connected to first DC power supply, the other end of described first inductance is connected to the point between the described first and the 3rd switching tube on the formed described series circuit of the described first and the 3rd switching tube, a wherein end of described second inductance is connected to second DC power supply, and the other end of described second inductance is connected to the point between the described second and the 4th switching tube on the formed described series circuit of the described second and the 4th switching tube, and, described control module is used for controlling described first according to the direction control signal of the flow direction that is illustrated in described DC-DC converter electric energy and the voltage detection signal of described first DC power supply and described second DC power supply, second, the operating state of third and fourth switching tube.
Description of drawings
Characteristics of the present invention, feature and advantage will become more apparent by the detailed description below in conjunction with accompanying drawing.Wherein:
Fig. 1 is the schematic diagram that the two-way step-up step-down DC-DC converter of prior art is shown;
Fig. 2 is the configuration diagram that illustrates according to the DC-DC converter of one embodiment of the invention;
Fig. 3 is the structural representation that illustrates according to the control module of one embodiment of the invention;
Fig. 4 is the structural representation that utilizes hard-wired control module that illustrates according to one embodiment of the invention;
Fig. 5 is that to illustrate be forward/u according to one embodiment of the invention at operation mode 1＞u 2Situation under the schematic diagram of the course of work of DC-DC converter;
Fig. 6 is that to illustrate be forward/u according to one embodiment of the invention at operation mode 1＜u 2Situation under the schematic diagram of the course of work of DC-DC converter;
Fig. 7 be illustrate according to one embodiment of the invention operation mode for oppositely/u 1＞u 2Situation under the schematic diagram of the course of work of DC-DC converter; And
Fig. 8 be illustrate according to one embodiment of the invention operation mode for oppositely/u 1＜u 2Situation under the schematic diagram of the course of work of DC-DC converter.
Embodiment
Below, will describe each embodiment of the present invention in conjunction with the accompanying drawings in detail.
Fig. 2 is the configuration diagram that illustrates according to the DC-DC converter of one embodiment of the invention.As shown in Figure 2, DC-DC converter 100 comprises main circuit 110 and control module 120.
Main circuit 110 comprises four switching tube S that are parallel with backward diode separately 1-S 4, three capacitor C 0-C 2, and two inductance L 1-L 2
Wherein, switching tube S 1, S 2, S 3And S 4Be parallel with backward diode D respectively 1, D 2, D 3And D 4Switching tube S 1And S 3Series connection, switching tube S 1And S 3Connect formed series circuit and capacitor C 0In parallel.Switching tube S 2And S 4Series connection, switching tube S 2And S 4Connect formed series circuit and capacitor C 0In parallel.In Fig. 2, switching tube S 1-S 4Be the insulated door gated transistors, yet the present invention not only is confined to switching tube S 1-S 4Be the insulated door gated transistors, in fact, switching tube S 1-S 4It also can be the gate-controlled switch device of power field effect transistor, power bipolar transistor or other type.
Inductance L 1An end be connected to and be positioned at switching tube S 1And S 3On the formed series circuit at switching tube S 1And S 3Between point, and inductance L 1The other end and DC power supply u 1Connect.
Inductance L 2An end be connected to and be positioned at switching tube S 2And S 4On the formed series circuit at switching tube S 2And S 4Between point, and inductance L 2The other end and DC power supply u 2Connect.
Capacitor C 1With DC power supply u 1Be connected in parallel, and capacitor C 2With DC power supply u 2Be connected in parallel.
Control module 120 is used for according to direction control signal and DC power supply u 1And u 2Voltage detection signal, perhaps, according to direction control signal, DC power supply u 1And u 2Voltage detection signal and inductance L 1Or inductance L 2Current detection signal, control switch pipe S 1-S 4Operating state (be in conducting state or be in off state).Here, this direction control signal is illustrated in the flow direction of electric energy in the DC-DC converter 100, wherein electric energy from DC power supply u 1Flow to DC power supply u 2Flow direction be called forward and electric energy from DC power supply u 2Flow to DC power supply u 1Flow direction be called oppositely.
Fig. 3 is the structural representation that illustrates according to the control module of one embodiment of the invention.As shown in Figure 3, control module 120 comprises pulse-width modulation (PWM:pulse width modulation) signal generating unit 1202, mode selected cell 1204 and driver element 1206.
Pulse-width modulation generating unit 1202 is used to produce pulse-width signal.Pulse-width modulation generating unit 1202 both can be DC power supply u 1Or u 2Voltage detection signal produce pulse-width signal as controlled quentity controlled variable, also can be DC power supply u 1Or u 2Voltage detection signal and inductance L 1Or L 2Current detection signal produce pulse-width signal as controlled quentity controlled variable.
When DC power supply u 1Or u 2Voltage detection signal when producing pulse-width signal as controlled quentity controlled variable, pulse-width modulation generating unit 1202 can use for example existing pulse duration modulation method based on voltage monocycle proportion integration differentiation (PID) control to produce pulse-width signal.
When DC power supply u 1Or u 2Voltage detection signal and inductance L 1Or L 2Current detection signal when producing pulse-width signal as controlled quentity controlled variable, pulse-width modulation generating unit 1202 can use for example existing pulse duration modulation method based on the control of electric current and voltage dicyclo to produce pulse-width signal.
Mode selected cell 1204 is used for receive direction control signal, DC power supply u 1Voltage detection signal and DC power supply u 2Voltage detection signal, the DC power supply u that is relatively received 1And u 2The magnitude relationship of voltage detection signal, and the operation mode of selecting DC-DC converter 100 according to the direction control signal that is received and comparative result.
Particularly, represent forward and comparative result when the direction control signal that is received and show DC power supply u 1Voltage detection signal greater than DC power supply u 2Voltage detection signal the time, selecting the operation mode of DC-DC converter 100 is the u of forward and DC power supply 1Voltage is greater than DC power supply u 2Voltage (forward/u 1＞u 2).
Represent forward and comparative result when the direction control signal that is received and show DC power supply u 1Voltage detection signal less than DC power supply u 2Voltage detection signal the time, selecting the operation mode of DC-DC converter 100 is the u of forward and DC power supply 1Voltage is less than DC power supply u 2Voltage (forward/u 1＜u 2).
When the direction control signal that is received is represented oppositely and comparative result shows DC power supply u 1Voltage detection signal greater than DC power supply u 2Voltage detection signal the time, the operation mode of selecting DC-DC converter 100 be the u of reverse and DC power supply 1Voltage is greater than DC power supply u 2Voltage (oppositely/u 1＞u 2).
When the direction control signal that is received is represented oppositely and comparative result shows DC power supply u 1Voltage detection signal less than DC power supply u 2Voltage detection signal the time, the operation mode of selecting DC-DC converter 100 be the u of reverse and DC power supply 1Voltage is less than DC power supply u 2Voltage (oppositely/u 1＜u 2).
Driver element 1206 is used for the pulse-width signal that produced according to mode selected cell 1204 selected operation modes and pulse-width signal generating unit 1202, each switching tube S in main circuit 110 1-S 4Export the corresponding driving signal respectively, with driving switch pipe S 1-S 4Be in conducting state or off state.
Particularly, when mode selected cell 1204 selected operation modes be forward/u 1＞u 2The time, driver element 1206 is to switching tube S 1, S 3And S 4The drive signal of output expression shutoff is with driving switch pipe S respectively 1, S 3And S 4Be in off state, and the pulse-width signal that pulse-width signal generating unit 1202 is produced is as representing that alternately the drive signal of turn-on and turn-off is exported to switching tube S 2, with driving switch pipe S 2Alternately be in conducting state and off state.
When mode selected cell 1204 selected operation modes are forward/u 1＜u 2The time, driver element 1206 is to switching tube S 1And S 4The drive signal of output expression shutoff is with driving switch pipe S respectively 1And S 4Be in off state, to switching tube S 2The drive signal of output expression conducting is with driving switch pipe S 2Be in conducting state, and the pulse-width signal that pulse-width signal generating unit 1202 is produced is as representing that alternately the drive signal of turn-on and turn-off is exported to switching tube S 3, with driving switch pipe S 3Alternately be in conducting state and off state.
When mode selected cell 1204 selected operation modes are reverse/u 1＞u 2The time, driver element 1206 is to switching tube S 2And S 3The drive signal of output expression shutoff is with driving switch pipe S respectively 2And S 3Be in off state, to switching tube S 1The drive signal of output expression conducting is with driving switch pipe S 1Be in conducting state, and the pulse-width signal that pulse-width signal generating unit 1202 is produced is as representing that alternately the drive signal of turn-on and turn-off is exported to switching tube S 4, with driving switch pipe S 4Alternately be in conducting state and off state.
When mode selected cell 1204 selected operation modes are reverse/u 1＜u 2The time, driver element 1206 is to switching tube S 2, S 3And S 4The drive signal of output expression shutoff is with driving switch pipe S respectively 2, S 3And S 4Be in off state, and the pulse-width signal that pulse-width signal generating unit 1202 is produced is as representing that alternately the drive signal of turn-on and turn-off is exported to switching tube S 1, with driving switch pipe S 1Alternately be in conducting state and off state.
It will be appreciated by those skilled in the art that the mode that control module 120 can utilize software, hardware or software and hardware to combine realizes.
Fig. 4 is the structural representation that utilizes hard-wired control module that illustrates according to one embodiment of the invention.As shown in Figure 4, control module 120 comprises sampling section 2010, pulse width control part 2020, mode selection part 2030 and logic control and drive part 2040.Here sampling section 2010 and pulse width control part 2020 form pulse-width signal generating unit 1202, and mode selects part 2030 corresponding to mode selected cell 1204, and logic control and drive part 2040 are corresponding to driver element 1206.In the present embodiment, pulse width control part 2020 is DC power supply u 1Or u 2Voltage detection signal and inductance L 1Or L 2Current detection signal as controlled quentity controlled variable, use pulse duration modulation method to produce pulse-width signal based on electric current and voltage dicyclo (voltage inter-loop electric current outer shroud) control.
Sampling section 2010 comprises sampling controller 5, and it has four inputs, is used to obtain inductance L 1Current detection signal A, DC power supply u 1Voltage detection signal B, DC power supply u 2Voltage detection signal C and inductance L 2Current detection signal D, and two output: P1 and P2.Output P1 is used for voltage sense signal B or C, and output P2 is used for output current detection signal A or D.
Pulse width control part 2020 comprises first subtracter 6, a PID controller 7, restriction controller 8, second subtracter 9, the 2nd PID control 10 and pulse width modulator 11.
First subtracter 6 is used to calculate from the signal of the output P1 of sampling controller 5 and the difference of reference voltage E.First subtracter 6 has two inputs and an output, and wherein, one of them input of first subtracter 6 connects the output P1 of sampling controller 5, and another input receives reference voltage E, with and the difference calculated of output output.
The one PID controller 7 is used for the difference of first subtracter, 6 outputs is carried out PID control.The one PID controller 7 has an input and an output, and wherein, the input of a PID controller 7 is connected to the output of first subtracter 6.
Restriction controller 8 is used to limit the value of a PID controller 7 outputs in preset range.Restriction controller 8 has an input and an output, and wherein, the input of restriction controller 8 is connected to a PID controller 7.
Second subtracter 9 is used to calculate from the value of the output of restriction controller 8 and difference from the signal of the output P2 of sampling controller 5.Second subtracter 9 has two inputs and an output, and wherein, one of them input of second subtracter 9 connects the output of restriction controller 8, and another input of second subtracter 9 connects the output P2 of sampling controller 5.
The 2nd PID controller 10 is used for the difference of second subtracter, 9 outputs is carried out PID control.The 2nd PID controller 10 has an input and an output.Wherein, the input of second controller 10 is connected to the output of second subtracter 9.
The signal that pulse width modulator 11 is used to utilize the 2nd PID controller 10 to be exported produces pulse-modulated signal.Pulse width modulator 11 has an input and an output.Wherein, the input of pulse width modulator 11 is connected to the output of the 2nd PID controller 10, and pulse width modulator 11 is exported to drive part 2040 (driver element 1206) to the pulse-width signal that it produced by its output.
Wherein, pulse width modulator 11 for example can adopt pulse-width modulation (PWM) control chip UC3525 to realize, the common circuit that first subtracter 6, a PID controller 7, restriction controller 8, second subtracter 9 and second controller 10 for example both can adopt corresponding operational amplifier to constitute realizes, also can adopt digital signal processor (DSP) or single-chip microcomputer (MCU) to realize.
Mode selects part 2030 to comprise voltage comparator 12 and logic of modality control circuit 13.
Voltage comparator 12 has two inputs and an output.Wherein, two of voltage comparator 12 inputs receive DC power supply u respectively 1Voltage detection signal B and DC power supply u 2Voltage detection signal C.Voltage detection signal B that voltage comparator 12 is relatively received and the magnitude relationship of C, and by its output output comparative result, wherein, this comparative result is B greater than C or B less than C.
Logic of modality control circuit 13 has two inputs and four outputs.Wherein, one of them input of logic of modality control circuit 13 is connected to the output of voltage comparator 12, another input receive direction control signal F of logic of modality control circuit 13.Logic of modality control circuit 13 is selected the operation mode of DC-DC converter 100 according to the direction control signal F that is received with from the comparative result of voltage comparator 12, and represents the operation mode signal of selected operation modes by its four output outputs.Particularly, when direction control signal F represents forward and is B during greater than C from the comparative result of voltage comparator 12, it is forward/u that logic of modality control circuit 13 is selected the operation mode of DC-DC converter 100 1＞u 2, and by its first output output expression forward/u 1＞u 2The operation mode signal; When direction control signal F represents forward and is B during less than C from the comparative result of voltage comparator 12, it is forward/u that logic of modality control circuit 13 is selected the operation mode of DC-DC converter 100 1＜u 2, and by its second output output expression forward/u 1＜u 2The operation mode signal; When direction control signal F represents oppositely and is B during greater than C from the comparative result of voltage comparator 12, it be reverse/u that logic of modality control circuit 13 is selected the operation mode of DC-DC converter 100 1＞u 2, and pass through its 3rd output output and represent oppositely/u 1＞u 2The operation mode signal; And when direction control signal F represents oppositely and is B during less than C from the comparative result of voltage comparator 12, it be reverse/u that logic of modality control circuit 13 is selected the operation mode of DC-DC converter 100 1＜u 2, and pass through its 4th output output and represent oppositely/u 1＜u 2The operation mode signal.
Wherein, the common circuit that voltage comparator 12 for example both can adopt corresponding operational amplifier to constitute realizes, also can adopt digital signal processor (DSP) or single-chip microcomputer (MCU) to realize.Logic of modality control circuit 13 for example can adopt with logical circuits such as door and not gates and realize.
Logic control and drive part 2040 are embodied as a circuit, are referred to herein as logic control and drive circuit 14, and it has five inputs and four outputs.Wherein, five inputs of logic control and drive circuit 14 are connected respectively to four outputs of logic of modality control circuit 13 and the output of pulse width modulator 11, and four outputs of logic control and drive circuit 14 are connected respectively to four switching tube S of main circuit 110 1-S 4Gate pole.Logic control and drive circuit 14 is according to from the operation mode signal of logic of modality control circuit 13 with from the pulse-width signal of pulse width modulator 11, to four switching tube S 1-S 4Export the corresponding driving signal respectively, with driving switch pipe S 1-S 4Be in conducting state or off state.
Logic control and drive circuit 13 for example can adopt and logical circuits such as door, not gate, and the corresponding gate-drive chip of switching tube is realized.
Fig. 5-the 8th illustrates the schematic diagram of the course of work of DC-DC converter under different operating mode according to one embodiment of the invention respectively.In Fig. 5-8, u Gs1～u Gs4Be respectively that control module 120 is exported to switching tube S 1～S 4The drive signal of gate pole, u 0Be intermediate capacitance C 0Voltage waveform, u L1, u L2It is respectively inductance L 1, L 2The voltage waveform at two ends, and i L1, i L2Be respectively to flow through inductance L 1, L 2Current waveform.
As shown in Figure 5, the operation mode when DC-DC converter is forward/u 1＞u 2The time, switching tube S 1, S 3And S 4Remain in off state, anti-and diode D 1Keep conducting, switching tube S 2With certain duty ratio work.Switching tube S 2With diode D 4In stage 1 and stages 2 alternate conduction, capacitor C 0Release energy in the stage 1, in stages 2 stored energy.
As shown in Figure 6, the operation mode when DC-DC converter is forward/u 1＜u 2The time, switching tube S 1And S 4Remain in off state, switching tube S 2Remain in conducting, switching tube S 3With certain duty ratio work.Switching tube S 3With diode D 1In stage 1 and stages 2 alternate conduction, capacitor C 0Release energy in the stage 1, in stages 2 stored energy.
As shown in Figure 7, the operation mode when DC-DC converter is reverse/u 1＞u 2The time, switching tube S 2And S 4Remain in off state, switching tube S 1Remain in conducting state, switching tube S 4With certain duty ratio work.Switching tube S 4With diode D 2In stage 1 and stages 2 alternate conduction, capacitor C 0Release energy in the stage 1, in stages 2 stored energy.
As shown in Figure 8, the operation mode when DC-DC converter is reverse/u 1＜u 2The time, switching tube S 2, S 3And S 4Remain in off state, anti-and diode D 2Keep conducting, switching tube S 1With certain duty ratio work.Switching tube S 1With diode D 3In stage 1 and stages 2 alternate conduction, capacitor C 0Release energy in the stage 1, in stages 2 stored energy.
Though it will be appreciated by those skilled in the art that among the embodiment that describes in the above, pulse width control part 2020 uses the pulse duration modulation method based on the control of voltage inter-loop electric current outer shroud to produce pulse-width signal, yet the present invention is not limited thereto.In some other embodiment of the present invention, pulse width control part 2020 also can use the pulse duration modulation method based on the control of outer voltage current inner loop to produce pulse-width signal.In this case, the output P1 outputting inductance L of sampling controller 5 1Current detection signal A or inductance L 2Current detection signal D, the output P2 output DC source u of sampling controller 5 1Voltage detection signal B or DC power supply u 2Voltage detection signal C, and first subtracter 6 does not receive reference voltage E but receives reference current.
Though it will be appreciated by those skilled in the art that main circuit 110 includes and DC power supply u in the enforcement of describing in the above 1The capacitor C that is connected in parallel 1With with DC power supply u 2The capacitor C that is connected in parallel 2Yet the present invention is not limited thereto.In some other embodiment of the present invention, main circuit 110 also can not comprise capacitor C 1And capacitor C 2
It will be appreciated by those skilled in the art that each embodiment of the present invention can make various distortion and change under the situation that does not depart from invention essence, these distortion and change should fall into protection scope of the present invention.Therefore, protection scope of the present invention should be defined by appending claims.

Claims (15)

1. DC-DC converter comprises:
Main circuit, wherein, described main circuit comprises:
First electric capacity;
The first, second, third and the 4th is parallel with the switching tube of backward diode separately, wherein, the series circuit that the described first and the 3rd switching tube forms is in parallel with described first electric capacity, and the series circuit that the described second and the 4th switching tube forms is in parallel with described first electric capacity;
First and second inductance, wherein, a wherein end of described first inductance is connected to first DC power supply, the other end of described first inductance is connected to the point between the described first and the 3rd switching tube on the formed described series circuit of the described first and the 3rd switching tube, a wherein end of described second inductance is connected to second DC power supply, and the other end of described second inductance is connected to the point between the described second and the 4th switching tube on the formed described series circuit of the described second and the 4th switching tube; And
Control module, be used for according to the direction control signal of flow direction that is illustrated in described DC-DC converter electric energy and the voltage detection signal of described first DC power supply and described second DC power supply, control described first, second, third and the operating state of the 4th switching tube.
2. DC-DC converter as claimed in claim 1, wherein, described control module further comprises:
The pulse-width signal generating unit is used for the voltage detection signal of described first DC power supply or described second DC power supply adopting corresponding pulse duration modulation method to produce pulse-width signal as controlled quentity controlled variable;
The mode selected cell is used for selecting the operation mode of described DC-DC converter according to magnitude relationship between the voltage detection signal of described first DC power supply and described second DC power supply and described direction control signal; And
Driver element is used for according to the operation mode of described selection and the pulse-width signal of described generation, drives the described first, second, third and the 4th switching tube and is in conducting state or off state.
3. DC-DC converter as claimed in claim 2, wherein,
Described pulse-width signal generating unit is further used for the current detection signal of the voltage detection signal of described first DC power supply or described second DC power supply and described first inductance or described second inductance adopting corresponding pulse duration modulation method to produce pulse-width signal as controlled quentity controlled variable.
4. as claim 2 or 3 described DC-DC converter, wherein,
Described mode selected cell is further used for that electric energy flows to described second DC power supply from described first DC power supply in the described DC-DC converter when the voltage detection signal of described first DC power supply is illustrated in greater than the voltage detection signal of described second DC power supply and described direction control signal, and the operation mode of selecting described DC-DC converter is the voltage of the voltage of forward and described first DC power supply greater than described second DC power supply.
5. as claim 2 or 3 described DC-DC converter, wherein,
Described mode selected cell is further used for that electric energy flows to described second DC power supply from described first DC power supply in the described DC-DC converter when the voltage detection signal of described first DC power supply is illustrated in less than the voltage detection signal of described second DC power supply and described direction control signal, and the operation mode of selecting described DC-DC converter is the voltage of the voltage of forward and described first DC power supply less than described second DC power supply.
6. as claim 2 or 3 described DC-DC converter, wherein,
Described mode selected cell is further used for that electric energy flows to described first DC power supply from described second DC power supply in the described DC-DC converter when the voltage detection signal of described first DC power supply is illustrated in greater than the voltage detection signal of described second DC power supply and described direction control signal, and the operation mode of selecting described DC-DC converter is the voltage of the voltage of reverse and described first DC power supply greater than described second DC power supply.
7. as claim 2 or 3 described DC-DC converter, wherein,
Described mode selected cell is further used for that electric energy flows to described first DC power supply from described second DC power supply in the described DC-DC converter when the voltage detection signal of described first DC power supply is illustrated in less than the voltage detection signal of described second DC power supply and described direction control signal, and the operation mode of selecting described DC-DC converter is the voltage of the voltage of reverse and described first DC power supply less than described second DC power supply.
8. as claim 2 or 3 described DC-DC converter, wherein,
It is that the voltage of forward and described first DC power supply is during greater than the voltage of described second DC power supply that described driver element is further used for operation mode when described selection, drive described first, third and fourth switching tube and be in off state, and utilize the pulse-width signal of described generation to drive described second switch pipe alternately to be in conducting state and off state.
9. as claim 2 or 3 described DC-DC converter, wherein,
It is that the voltage of forward and described first DC power supply is during less than the voltage of described second DC power supply that described driver element is further used for operation mode when described selection, drive the described first and the 4th switching tube and be in off state, drive described second switch pipe and be in conducting state, and utilize the pulse-width signal of described generation to drive described the 3rd switching tube alternately to be in conducting state and off state.
10. as claim 2 or 3 described DC-DC converter, wherein,
It is that the voltage of reverse and described first DC power supply is during greater than the voltage of described second DC power supply that described driver element is further used for operation mode when described selection, drive the described second and the 3rd switching tube and be in off state, drive described first switching tube and be in conducting state, and utilize the pulse-width signal of described generation to drive described the 4th switching tube alternately to be in conducting state and off state.
11. as claim 2 or 3 described DC-DC converter, wherein,
It is that the voltage of reverse and described first DC power supply is during less than the voltage of described second DC power supply that described driver element is further used for operation mode when described selection, drive described second, third and the 4th switching tube and be in off state, and utilize the pulse-width signal of described generation to drive described first switching tube alternately to be in conducting state and off state.
12. DC-DC converter as claimed in claim 3, wherein, described pulse-width signal generating unit further comprises:
Sampling controller, have four inputs and two outputs, wherein, four inputs of described sampling controller receive the current detection signal of described first and second inductance and the voltage detection signal of described first and second DC power supply respectively, and two outputs of described sampling controller are exported the current detection signal of described first inductance or described second inductance and the voltage detection signal of described first DC power supply or described second DC power supply respectively;
First subtracter, have two inputs and an output, wherein, one of them input of described first subtracter is connected to one of them output of described two outputs of described sampling controller, and another input of described first subtracter receives reference voltage or reference current;
First proportional plus integral plus derivative controller has an input and an output, and wherein, the input of described first proportional plus integral plus derivative controller is connected to the output of described first subtracter;
Restriction controller has an input and an output, and wherein, the input of described restriction controller is connected to the output of described first proportional plus integral plus derivative controller;
Second subtracter, have two inputs and an output, wherein, one of them input of described second subtracter is connected to another output of described two outputs of described sampling controller, and another input of described second subtracter is connected to the output of described restriction controller;
Second proportional plus integral plus derivative controller has an input and an output, and wherein, the input of described second proportional plus integral plus derivative controller is connected to the output of described second subtracter; And
Pulse width modulator, have an input and an output, wherein, the input of described pulse width modulator is connected to the output of described second proportional plus integral plus derivative controller, and described pulse width modulator is exported to described driver element to the pulse-width signal that it produced by its output.
13. as claim 2 or 3 described DC-DC converter, wherein, described mode selected cell further comprises:
Voltage comparator, be used for more described first DC power supply voltage detection signal and the magnitude relationship of the voltage detection signal of described second DC power supply, and output comparative result; And
Logic of modality control circuit, be used for according to described direction control signal with from the comparative result of described voltage comparator, select the operation mode of described DC-DC converter, and operation mode signal from the operation mode of described selection to described driver element output that represent.
14. as claim 2 or 3 described DC-DC converter, wherein, described driver element is embodied as a circuit.
15. DC-DC converter as claimed in claim 1, wherein, described main circuit also comprises second electric capacity and the 3rd electric capacity, and described second electric capacity is in parallel with first DC power supply, and described the 3rd electric capacity is in parallel with second DC power supply.
CN2009101675338A 2009-08-21 2009-08-21 DC-DC converter Pending CN101997409A (en)

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CN112260537A (en) * 2020-10-14 2021-01-22 哈尔滨工程大学 Direct-current Boost power supply adopting double-tube Buck-Boost circuit
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DE102014203159A1 (en) * 2014-02-21 2015-08-27 Airbus Operations Gmbh Fuel cell system in a bipolar high-voltage network and method for operating a bipolar high-voltage network
DE102014203157A1 (en) 2014-02-21 2015-08-27 Airbus Operations Gmbh Bipolar high voltage network and method for operating a bipolar high voltage network

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GB2376357B (en) * 2001-06-09 2005-05-04 3D Instr Ltd Power converter and method for power conversion
DE102007058681A1 (en) * 2007-12-06 2009-06-10 Siemens Ag Step up and step down controller, particularly for feeding, for use with half bridge and full bridge for converting direct current voltage into output direct current voltage, has fuel cells in electrical network

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CN112260537A (en) * 2020-10-14 2021-01-22 哈尔滨工程大学 Direct-current Boost power supply adopting double-tube Buck-Boost circuit
CN112421968A (en) * 2020-11-09 2021-02-26 武汉理工大学 Multipurpose converter and control method thereof
CN112421968B (en) * 2020-11-09 2024-03-08 武汉理工大学 Multipurpose converter and control method thereof

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