CN111130339B - High-voltage gain boost converter - Google Patents
High-voltage gain boost converter Download PDFInfo
- Publication number
- CN111130339B CN111130339B CN201911366686.5A CN201911366686A CN111130339B CN 111130339 B CN111130339 B CN 111130339B CN 201911366686 A CN201911366686 A CN 201911366686A CN 111130339 B CN111130339 B CN 111130339B
- Authority
- CN
- China
- Prior art keywords
- digital
- output
- unit
- module
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
Abstract
The invention provides a high-voltage gain boost converter, and belongs to the technical field of switching power supplies. The power supply comprises a filtering energy storage unit, a switch unit, a voltage doubling unit and an output capacitor unit, wherein the input end of the filtering energy storage unit is connected with the anode of a power supply interface, the output end of the filtering energy storage unit is respectively connected with one end of the switch unit and the input end of the voltage doubling unit, the output end of the voltage doubling unit is connected with one end of the output capacitor unit and the anode of a load interface, and the other end of the output capacitor unit, the cathode end of the load interface and the other end of the switch unit are respectively connected with the cathode of the power supply interface. The invention has the beneficial effects that: high voltage gain of the converter is achieved.
Description
Technical Field
The present invention relates to switching power supply structures, and particularly to a high voltage gain boost converter.
Background
In the existing high-voltage gain topology, a high-gain DC/DC converter constructed based on a switched capacitor network is a common non-isolated topology, and the principle is that the voltage is improved in a mode of series discharge and parallel charge by utilizing the property that the voltage of a capacitor cannot be suddenly changed. However, the switched capacitor network structure also has a certain disadvantage, and the realization of the series-parallel connection charge-discharge process requires that a voltage difference exists in the capacitor network to enable the parallel capacitor circuit to realize the charge-discharge between capacitors, but the charge-discharge process can be realized at an instant when the switch state changes, so that a larger pulse current value exists in the charge-discharge network, and meanwhile, the efficiency of the converter is reduced due to the large current when the impedance value in the charge-discharge circuit is lower. In addition, because the boost topology has certain limitation in control, the effect is poor by adopting the single closed-loop control of the voltage.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-voltage gain boost converter, which realizes the high-voltage gain of the converter.
The power supply comprises a filtering energy storage unit, a switch unit, a voltage doubling unit and an output capacitor unit, wherein the input end of the filtering energy storage unit is connected with the anode of a power supply interface, the output end of the filtering energy storage unit is respectively connected with one end of the switch unit and the input end of the voltage doubling unit, the output end of the voltage doubling unit is connected with one end of the output capacitor unit and the anode of a load interface, and the other end of the output capacitor unit, the cathode end of the load interface and the other end of the switch unit are respectively connected with the cathode of the power supply interface.
The invention is further improved, and the filtering energy storage unit is an inductor L.
The invention is further improved, and the switch unit is a switch tube S.
In a further improvement of the present invention, the output capacitor unit includes a capacitor C1 and a capacitor C3 connected in series.
The invention further improves the voltage doubling unit, which comprises an inductor Ls, a capacitor C2 and diodes D1-D3, wherein the output end of the filtering energy storage unit is respectively connected with one end of the inductor Ls and the anode of the diode D3, the other end of the inductor Ls is respectively connected with the anode of the diode D1 and the cathode of the diode D2 through the capacitor C2, the cathode of the diode D3 is respectively connected with the anode of the diode D3 and is connected between the serially connected C1 and C3, the other end of the diode D1 is connected with the other end of the capacitor C1, and the other end of the capacitor C3 is connected with the cathode of a power interface.
The invention is further improved and also comprises a control unit, wherein the control unit comprises an input current sampling module, a voltage-multiplying current sampling module, an output current sampling module, a current inner ring control module and an outer ring digital controller which are respectively connected with the control end of the switch unit, wherein the input end of the outer ring digital controller is respectively connected with the output ends of the input current sampling module and the output current sampling module, the input end of the current inner ring control module is respectively connected with the output end of the outer ring digital controller and the output end of the voltage-multiplying current sampling module, and the output end of the current inner ring control module is connected with the control end of the switch unit.
The invention is further improved, the input current sampling module comprises a resistor Rc and a resistor Rd which are connected in series with the anode of the power interface, the other end of the resistor Rd is grounded, the first input end of the digital controller module is connected between the resistor Rc and the resistor Rd, the output current sampling module comprises a resistor Ra and a resistor Rb which are connected in series with the output voltage, the other end of the resistor Rb is grounded, and the second input end of the digital controller module is connected between the resistor Ra and the resistor Rb.
The invention is further improved, the outer ring digital controller comprises a first analog-to-digital conversion module, a second analog-to-digital conversion module, a digital-to-analog conversion module, a digital closed-loop controller and a digital compensation module, wherein the input end of the first analog-to-digital conversion module is connected with the input current sampling module, the output end of the first analog-to-digital conversion module is connected with the input end of the digital compensation module, the input end of the second analog-to-digital conversion module is connected with the output current sampling module, the output end of the second analog-to-digital conversion module is connected with the input end of the digital closed-loop controller, the output numerical value of the digital closed-loop controller and the numerical value output by the digital compensation module are subjected to subtraction operation and then input into the input end of the digital-to-analog conversion module, and the output end of the digital-to-analog conversion module is subjected to the current reference value required by the inner-loop control module.
The invention is further improved, and the digital closed-loop controller comprises a digital PID controller, a singlechip, a DSP or an FPGA digital controller.
The invention is further improved, the current inner loop control module comprises a comparator and a D trigger connected with the output end of the comparator, wherein the non-inverting input end of the comparator is connected with the output end of the voltage-multiplying current sampling module, the inverting input end of the comparator is connected with the output end of the analog-to-digital conversion module, and the D trigger gives the duty ratio of the switch module to realize current mode control.
Compared with the prior art, the invention has the beneficial effects that: the converter can realize high voltage gain, and meanwhile, compared with a switched capacitor network, the converter loss is reduced because the voltage doubling unit of the converter is in the energy flowing process, and meanwhile, a switching tube of the converter realizes zero current switching-on; the mixed signal current control mode enables the converter to realize cycle-by-cycle current protection, obtain faster dynamic response and realize complex control strategies, and particularly when the converter enters certain specific working conditions, the digital control chip can properly adjust the control method and improve the performance of the converter.
Drawings
FIG. 1 is a schematic diagram of the circuit of the present invention;
fig. 2 is a schematic diagram of a circuit including a control unit according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the high-voltage gain boost converter of the present invention includes a switching tube S, an input inductor L with a filtering and energy storing function, a voltage doubling unit and an output capacitor unit, wherein the voltage doubling unit includes an inductor Ls, a capacitor C2, and diodes D1, D2, and D3, the output terminal of the voltage doubling unit includes two capacitors C1 and C3 connected in series to form the input capacitor unit, and the output terminal of the voltage doubling unit is further connected to a load RO. One end of the switch S, the anode of the diode D3 and the input end of the Ls are connected with the output end of the input inductor L, the other end of the switch tube S is grounded, the two series output capacitors C1 and C3 are connected in series and then connected with the output load Ro in parallel, the middle points of the output capacitors C1 and C3 are connected with the connection points of the diodes D2 and D3, the other ends of the inductor Ls and the capacitor C2 are connected with the connection points of the diodes D1 and D2, and the diode D1 is connected with the input end of the load.
When a switching tube S of the converter is switched on and off, a capacitor C2 and an inductor Ls series branch in the voltage doubling unit respectively carry out charging and discharging processes with two output capacitors C1 and C3 to finish energy transfer, and the voltage on the two series output capacitors and the voltage at two ends of the voltage doubling unit realize dynamic balance, so that high voltage gain of the converter is realized. The capacitor C2 and the inductor Ls are connected in series to form a branch circuit, so that the switching tube S realizes zero current switching-on, the impedance of a charge-discharge loop is improved, the pulse current is reduced, and the efficiency of the high-voltage gain converter is improved. The high-voltage gain boost converter is simple in structure, flexible in design and adjustment and high in practicability.
As shown in fig. 2, the present embodiment further includes a control unit for controlling the switching tube S, where a control strategy of the control unit is an analog-digital mixed signal current control mode, and for the characteristics of a high-voltage gain topology that input current is large and dynamic response is general, the control architecture adopts a continuous analog comparator and a D flip-flop to implement a current inner loop of a peak current control mode, and an outer loop is implemented by a digital controller, and the digital controller calculates a current reference value required by the inner-loop continuous analog comparator by sampling output voltage and output current, so as to provide a duty ratio of the switching tube of the converter through the D flip-flop, thereby implementing current mode control.
Specifically, the control unit of this example includes an input current sampling module, a voltage-doubling current sampling module, an output current sampling module, an inner current ring control module and an outer ring digital controller that are respectively connected to the S control end of the switching tube, wherein the input end of the outer ring digital controller is respectively connected to the output ends of the input current sampling module and the output current sampling module, the input end of the inner current ring control module is respectively connected to the output end of the outer ring digital controller and the output end of the voltage-doubling current sampling module, and the output end of the inner current ring control module is connected to the control end of the switching unit.
The input current sampling module of this example includes resistance Rc and resistance Rd of establishing ties at the power source interface positive pole, resistance Rd's the other end ground connection, the first input termination resistance Rc of digital controller module and resistance Rd between, output current sampling module is including concatenating resistance Ra and resistance Rb on output voltage, resistance Rb's the other end ground connection, digital controller module's the second input termination resistance Ra and resistance Rb between.
The outer ring digital controller of the embodiment comprises a first analog-to-digital conversion module (ADC), a second analog-to-digital conversion module (ADC), a digital-to-analog conversion module (DAC), a digital closed-loop controller and a digital compensation module, wherein the input end of the first analog-to-digital conversion module is connected with an input current sampling module, the output end of the first analog-to-digital conversion module is connected with the input end of the digital compensation module, the input end of the second analog-to-digital conversion module is connected with an output current sampling module, the output end of the second analog-to-digital conversion module is connected with the input end of the digital closed-loop controller, the output value of the digital closed-loop controller and the value output by the digital compensation module are subjected to subtraction operation and then input into the input end of the digital-to-analog conversion module, and the output end of the digital-to-analog conversion module is subjected to current reference value required by an inner-loop control module.
The implementation method of the analog-to-digital conversion circuit in this example also includes various integrated analog-to-digital conversion (ADC) circuits, such as parallel, successive approximation type, integral type, sigma-delta modulation type, pipeline type, etc., and the digital-to-analog conversion circuit can also be implemented by various existing integrated analog-to-digital conversion circuits.
The digital closed-loop controller of this embodiment is implemented by using a digital PID controller, and certainly, the digital closed-loop controller of this embodiment may also be implemented by using a program algorithm for implementing similar functions, for example, by using a digital controller such as a single chip, a DSP (digital processing chip), an FPGA, or the like, without specific circuit limitations.
The current inner loop control module of the embodiment comprises a comparator and a D trigger connected with the output end of the comparator, wherein the non-inverting input end of the comparator is connected with the output end of the voltage-multiplying current sampling module, the inverting input end of the comparator is connected with the output end of the analog-to-digital conversion module, and the D trigger gives the duty ratio of the switch module to realize current mode control. The D trigger of the embodiment adopts a pulse width modulation circuit PWM, the voltage-multiplying current sampling module is a sampling resistor R, and the sampling resistor R is arranged between the switching tube S and the negative electrode of the power supply, and other current detection methods can also be used.
The high-voltage gain boost converter and the control strategy thereof provided by the invention enable the converter to realize high-voltage gain, and simultaneously, because the voltage doubling unit is formed by connecting the capacitor and the inductor in series, the energy flow between the voltage doubling unit and the output capacitor is realized through the diode, the converter loss is reduced compared with a switched capacitor network by the voltage doubling unit of the capacitor and the inductor in the energy flow process, and meanwhile, the zero current switching-on of a switching tube of the converter is realized. The mixed signal current control mode enables the converter to realize cycle-by-cycle current protection, obtain faster dynamic response and realize complex control strategies, and particularly when the converter enters certain specific working conditions, the digital control chip can properly adjust the control method and improve the performance of the converter.
The above-described embodiments are intended to be illustrative, and not restrictive, of the invention, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A high voltage gain boost converter, characterized by: the power supply comprises a filtering energy storage unit, a switch unit, a voltage doubling unit and an output capacitor unit, wherein the input end of the filtering energy storage unit is connected with the anode of a power supply interface, the output end of the filtering energy storage unit is respectively connected with one end of the switch unit and the input end of the voltage doubling unit, the output end of the voltage doubling unit is connected with one end of the output capacitor unit and the anode of a load interface, the other end of the output capacitor unit, the cathode end of the load interface and the other end of the switch unit are respectively connected with the cathode of the power supply interface,
the control unit comprises an input current sampling module, a voltage doubling current sampling module, an output current sampling module, a current inner ring control module and an outer ring digital controller, wherein the input end of the outer ring digital controller is respectively connected with the output ends of the input current sampling module and the output current sampling module, the input end of the current inner ring control module is respectively connected with the output end of the outer ring digital controller and the output end of the voltage doubling current sampling module, the output end of the current inner ring control module is connected with the control end of the switch unit,
the outer ring digital controller comprises a first analog-to-digital conversion module, a second analog-to-digital conversion module, a digital-to-analog conversion module, a digital closed-loop controller and a digital compensation module, wherein the input end of the first analog-to-digital conversion module is connected with the input current sampling module, the output end of the first analog-to-digital conversion module is connected with the input end of the digital compensation module, the input end of the second analog-to-digital conversion module is connected with the output current sampling module, the output end of the second analog-to-digital conversion module is connected with the input end of the digital closed-loop controller, the output numerical value of the digital closed-loop controller and the numerical value output by the digital compensation module are subjected to subtraction operation and then input into the input end of the digital-to-analog conversion module, and the output end of.
2. The high voltage gain boost converter of claim 1, wherein: the filtering energy storage unit is an inductor L.
3. The high voltage gain boost converter of claim 1, wherein: the switch unit is a switch tube S.
4. The high voltage gain boost converter of claim 1, wherein: the output capacitance unit comprises a capacitor C1 and a capacitor C3 which are connected in series.
5. The high voltage gain boost converter of claim 4, wherein: the voltage doubling unit comprises an inductor Ls, a capacitor C2 and diodes D1-D3, wherein the output end of the filtering energy storage unit is respectively connected with one end of the inductor Ls and the anode of the diode D3, the other end of the inductor Ls is respectively connected with the anode of the diode D1 and the cathode of the diode D2 through the capacitor C2, the cathode of the diode D3 is connected with the anode of the diode D2 and connected between the serially connected C1 and C3, the cathode of the diode D1 is connected with the other end of the capacitor C1, and the other end of the capacitor C3 is connected with the cathode of a power interface.
6. A high voltage gain boost converter according to any of claims 1-5, wherein: input current sampling module is including establishing ties at anodal resistance Rc of power source interface and resistance Rd, resistance Rd's other end ground connection, outer loop digital controller's first input termination resistance Rc and resistance Rd between, output current sampling module is including concatenating resistance Ra and resistance Rb on output voltage, resistance Rb's other end ground connection, outer loop digital controller's second input termination resistance Ra and resistance Rb between.
7. The high voltage gain boost converter of claim 6, wherein: the digital closed-loop controller comprises a digital PID controller, a single chip microcomputer and a DSP or FPGA digital controller.
8. The high voltage gain boost converter of claim 7, wherein: the current inner loop control module comprises a comparator and a D trigger connected with the output end of the comparator, wherein the in-phase input end of the comparator is connected with the output end of the voltage-multiplying current sampling module, the reverse phase input end of the comparator is connected with the output end of the digital-to-analog conversion module, and the D trigger gives the duty ratio of the switch unit to realize current mode control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366686.5A CN111130339B (en) | 2019-12-26 | 2019-12-26 | High-voltage gain boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911366686.5A CN111130339B (en) | 2019-12-26 | 2019-12-26 | High-voltage gain boost converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111130339A CN111130339A (en) | 2020-05-08 |
| CN111130339B true CN111130339B (en) | 2021-09-10 |
Family
ID=70503074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911366686.5A Active CN111130339B (en) | 2019-12-26 | 2019-12-26 | High-voltage gain boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111130339B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008050272A2 (en) * | 2006-10-26 | 2008-05-02 | Nxp B.V. | Voltage-boosting stage |
| JP2010226793A (en) * | 2009-03-19 | 2010-10-07 | Ihi Corp | Bidirectional step-up/down converter |
| CN205195559U (en) * | 2015-11-23 | 2016-04-27 | 山东科技大学 | Novel DC -DC converter steps up |
| CN205377667U (en) * | 2016-02-01 | 2016-07-06 | 浙江艾罗电源有限公司 | Boost converter based on switched inductor |
| US11031867B2 (en) * | 2017-12-08 | 2021-06-08 | Cirrus Logic, Inc. | Digital-to-analog converter with embedded minimal error adaptive slope compensation for digital peak current controlled switched mode power supply |
| CN108880240A (en) * | 2018-08-03 | 2018-11-23 | 东南大学 | Compound double asymmetric voltage doubling unit DC-DC converters |
-
2019
- 2019-12-26 CN CN201911366686.5A patent/CN111130339B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| "A Multimode 1-MHz PFC Front End With Digital Peak Current Modulation";Ryan Fernandes,等;《IEEE TRANSACTIONS ON POWER ELECTRONICS》;20160831;第31卷(第8期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111130339A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108599564A (en) | A kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters | |
| WO2021022582A1 (en) | Single-inductor multi-output dc-dc buck converter | |
| CN106712503A (en) | Quasi-switch boost DC-DC converter employing switching inductor and switching capacitor | |
| CN105939108B (en) | A kind of quasi- boost switching DC-DC converter of switched inductors type | |
| CN105939107B (en) | A kind of quasi- boost switching DC-DC converter of mixed type | |
| CN108923410B (en) | Controller and control method and a kind of energy-trap chip for collection of energy | |
| CN103296883A (en) | Method and device for controlling direct-current-to-direct-current converter wide in input voltage and load range | |
| CN113346750A (en) | Soft switching in-phase buck-boost converter based on coupling inductor and control method | |
| CN110429817B (en) | Double-loop control circuit and method for bidirectional direct current converter | |
| CN108718156A (en) | A kind of adjustable constant-power direct-current power supply system of output voltage wide scope | |
| CN114784898A (en) | Control and design method of self-adaptive current control circuit of parallel battery cluster | |
| CN106899207B (en) | Improved constant on-time control method for high-transformation-ratio direct-current buck converter | |
| CN108391344B (en) | L ED driving system frequency conversion constant current control method based on switch capacitor converter | |
| CN111130339B (en) | High-voltage gain boost converter | |
| CN116526861A (en) | Charge equalization control system with resonance topology input, series connection, output and parallel connection combined | |
| CN108683343B (en) | Buck-Boost bridgeless PFC converter in pseudo-continuous conduction mode | |
| CN216625586U (en) | Wide-range input non-isolated three-port DC-DC converter | |
| CN114696616A (en) | Three-port high-gain boost DC/DC converter based on differential connection and control method thereof | |
| CN114759786A (en) | Current control method and circuit of buck-boost converter | |
| CN112953205A (en) | Improved ripple-free buck-boost DC-DC converter | |
| CN114499183A (en) | Wide-range input non-isolated three-port DC-DC converter | |
| CN110071651B (en) | Non-isolated boost inverter circuit with symmetrical structure | |
| CN110855145B (en) | Three-port direct current converter and control method and circuit thereof | |
| CN110034676A (en) | A kind of control method and device of converter | |
| CN211377893U (en) | Power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |